Bibliografie tematiche / Diesel motor – Fuel systems

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Letteratura scientifica selezionata sul tema "Diesel motor – Fuel systems"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 28 gennaio 2023

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Articoli di riviste sul tema "Diesel motor – Fuel systems"

Vorob'ev, Yu V., e A. V. Dunaev. "Increasing the calorific value of motor fuels". Traktory i sel hozmashiny 83, n. 8 (15 agosto 2016): 48–51. http://dx.doi.org/10.17816/0321-4443-66236.

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The results of the studies of mechanochemical activation of motor fuels aimed to increase their calorific value and reduce their consumption in automotive internal combustion engines are summarized. Traditionally, the improvement in fuel efficiency and environmental friendliness of such engines is achieved by high-tech modernization of fuel systems. But it can also be achieved by modification of fuels that changes their properties and increases the calorific value. By means of methods of mechanochemistry, using the equipment with low power consumption and a simple process, the mixtures and separate oil fractions are destroyed with the formation of low molecular homologs, as well as hydrogen and carbon. The degradation of saturated hydrocarbons is the breaking of chains, and unsaturated ones are destroyed through the formation of saturated products. The hydrogenation by degradation products of the starting material is possible. The mechanochemistry of fuels is investigated on the example of a combined static mixer-activator. The activator in the form of cylinder of 150 mm length and 30-50 mm diameter is used for modifying motor fuels; it has three serial camera, embeds in any of the fuel systems of internal combustion engine, does not require the drive, is free of chemical substances, does not affect the performance of gasoline, diesel fuel, aviation kerosene, fuel oil, does not reduce the engine lifetime. The tests were performed on a test bench with YaMZ-236 diesel engine using three different diesel fuels, at first with installation of activator in the fuel supply line of fuel high pressure pump, and then in its main drain line. When idling of diesel engine with engine speed of 900-1300 rpm, the reduction of activated fuel consumption on average by 26.3% is revealed in eleven tests. The methods for improving the calorific value of fuels by different impacts are reviewed.

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Sala, José A., José F. Schlosser, Gilvan M. Bertollo, Daniela Herzog, Rovian Bertinatto e Leonardo N. Romano. "Performance of a diesel engine using different biodiesel blends and injection configurations". Revista Brasileira de Engenharia Agrícola e Ambiental 27, n. 1 (gennaio 2023): 70–78. http://dx.doi.org/10.1590/1807-1929/agriambi.v27n1p70-78.

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ABSTRACT Diesel cycle engines are widely used in a wide range of agricultural activities. Recently, with the increasing use of biodiesel mixed with petroleum diesel and the introduction of pollutant emission regulations for agricultural and road machinery, there has been a growing migration from mechanical to electronic fuel injection systems. In this experiment, the primary aim was to verify the behavior of a diesel engine, electronically managed, with controlled variation of the fuel feeding system parameters (injection time and volume injected). A four-cylinder agricultural tractor with a turbocharged engine and a common rail electronic fuel injection system was used. Tests with diesel B10 and blends of 20 and 30% biodiesel were carried out, all with 10 ppm of sulfur and the injection system electronically reprogrammed. The tests were performed under full engine load from 1,300 to 2,000 rpm. The torque, power and fuel consumption were evaluated. Advancing the injection point increased the power and decreased the specific fuel consumption for all fuels. The greater amount of injected fuel provided average power gain of up to 14.96% and average torque gain of 15.50%.

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Dubov, Georgiy, Dmitriy Trukhmanov, Iliya Kuznetsov, Sergey Nokhrin e Aleksey Sergel. "Procedure for Haul Truck On-Board LNG Fuel Systems Performance Evaluation". E3S Web of Conferences 105 (2019): 03019. http://dx.doi.org/10.1051/e3sconf/201910503019.

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The state-of-the-art of the advantages of using liquefied natural gas as a motor fuel for haul trucks instead of oil motor fuel is considered. It is noted that the energy intensity of the process of rock mass hauling by dual-fuel (gas-diesel) haul trucks is less than that of haul trucks running on diesel only. It is argued that the most promising in relation to heavy-duty mining trucks, is the conversion of diesel engines to gas-diesel operation. The universal integrated procedure for evaluating currently used haul truck on-board cryogenic fuel systems performance is presented. The method of evaluating the “rate of replacement” of diesel fuel with liquefied natural gas, when operating haul trucks equipped with on-board cryogenic fuel systems, is described in detail. The possible sequence of per-cycle, per-ingle-shift and per-day monitoring of the rate of diesel fuel replacement with liquefied natural gas is presented. The method for evaluating the economic efficiency of the operation of high-payload-capacity haul trucks conversed to gas-diesel operation is given, which allows, among other things, determining the actual service life of on-board cryogenic fuel systems and their time to failure.

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Mal'chuk, V. I., A. Yu Dunin, I. V. Alekseev, Yu V. Trofimenko e S. M. Kalinina. "Fuel systems for feeding mixed fuels in high-speed diesel engines". Traktory i sel hozmashiny 84, n. 9 (15 settembre 2017): 3–10. http://dx.doi.org/10.17816/0321-4443-66310.

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The article presents the results of the assembly and testing of the fuel system variants developed at the Moscow State Automobile and Road Technical University for the supply of mixed fuel with the possibility of changing their composition during the injection process. The nozzle housing for mixed fuel differs from the housing of the serial product by the presence of two channels for supplying to the atomizer, respectively, the main fuel and additive. The nozzle is equipped with a sprayer, which also has channels for supplying diesel and alternative fuels. The supply of diesel fuel through the axial channel in the nozzle of the nebulizer is also of fundamental importance, since it inevitably falls into the gap between the needle and the body and thereby facilitates the lubrication of this precision pair. Mixing of the components of the mixture is carried out in the cavity located at the base of the locking cone of the needle. This is another principal feature of the nozzle atomizer design, intended for mixed fuel. Motor fuel mixture research was carried out on a single-cylinder engine mounted on the universal crate of IT-9 (1 Ch 10.5 / 12). It is shown that an increase in the proportion of water in a mixture with diesel fuel leads to an improvement in the composition of combustion products in diesel. Thus, with a 50 % water content, carbon emissions are reduced by almost 10 times, nitrogen oxides by a factor of 2,6, and carbon oxide by a factor of 2,5. The working capacity of the development during its operation as a part of the diesel engine (2 Ch × 10.5 / 12) is shown and the possibility of improving its ecological characteristics with a reduction in the consumption of diesel fuel by partial replacement with ethanol is demonstrated.

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Priporov, Igor. "DIESEL POWER SYSTEM ON MIXED FUEL ON MTP TYPE TRACTOR". SCIENCE IN THE CENTRAL RUSSIA, n. 3 (30 giugno 2022): 120–28. http://dx.doi.org/10.35887/2305-2538-2022-3-120-128.

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One of the types of motor fuel for motor diesel engines is a mixed fuel obtained by mixing mineral diesel fuel and vegetable oil. The experience of using such a mixed fuel on the MTР-80 tractor shows that the start and heating of the diesel engine must be carried out on mineral diesel fuel, and the operation of the diesel engine in other modes - on mixed fuel The purpose of the research is to develop a diesel power system on mixed fuel for adapting diesel engines of automotive equipment, for example, MTР type tractors to work on viscous vegetable fuel (31.54-34.56cSt). Most of the known systems have disadvantages, which are inherent in not being adapted to work on rapeseed oil, due to its viscosity, as well as contamination of the two-section pumping pump and mixing of contaminated fuels in the mixer, which leads to their contamination with suspended flakes. At the Department of Tractors, Automobiles and Technical Mechanics, the author proposed a diesel power system on mixed fuel, for which RF patent No. 2757356 was obtained. The article presents the device and the technological process of its operation. The execution of technological operations in the diesel power system on the mixed fuel of the MTР tractor type allows to improve the quality of cleaning due to the high viscosity of vegetable fuel (31.54-34.56 cSt) for the operation of the diesel engine. In addition, a multimedia device and a computer are used in the system, which controls the quality of mixing of two types of fuels. Further scientific research should be aimed at the introduction of computer equipment into the power supply system of the MTР type tractor diesel engine.

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Khakimov, J., M. Shatrov e J. Turdiev. "INVESTIGATION OF DIESEL ENGINE`S WORKING PROCESS ON LIGHT FUEL". Technical science and innovation 2020, n. 1 (31 marzo 2020): 19–27. http://dx.doi.org/10.51346/tstu-01.20.1-77-0047.

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The article considers the investigation results of the working process of diesel on light fuel. Consumption of natural resources in the form of hydrocarbon fuels, which is steadily increasing in transport, the number of rolling stock, and combustion products of motor fuels cause environmental pollution. It is shown that the transition to cheaper alternative types of fuel, by its characteristics, not inferior to liquid motor fuels, is one of the options to reduce operating costs and harmful emissions. The scheme of classification of gas systems of fuel transfer is presented: by design of the system of filling and storage of gas; by quantity of the substituted basic fuel in the system of fuel supply; by method of dosing of fuel; by name and place of sending of a control signal; by design of the unit of decrease in pressure of gas; by design and a site of heating devices of a gas stream of a high pressure; by a method of ignition of a gas-air mix; by a method of change of indicators of working process; by an aggregate condition of used According to the results of theoretical and operational research of the gas engine based on a supercharged diesel engine: the necessity of using a gas injector power supply system has been established; the power and torque of the gas engine created on the basis of a supercharged diesel engine practically do not differ from that of the diesel engine, which is explained by a relatively high degree of compression for engines with spark ignition (ε=2); it has been shown that in the long term it is possible to use gas supply systems under pressure directly into the engine cylinder. As a result, the most affordable commercial alternative fuel for road transport in Uzbekistan turned out to be natural gas.

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Lenďák, Peter, Juraj Jablonický, Daniela Uhrinová, Ján Kosiba e Ján Polerecký. "Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles". Advanced Materials Research 1059 (dicembre 2014): 119–25. http://dx.doi.org/10.4028/www.scientific.net/amr.1059.119.

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Solid carbon (C) is produced during hydrocarbon fuels combustion by the molecules heat decomposition process in a local lack of oxygen. More reactive hydrogen consumed the part of oxygen in the zone of an oxygen-rich mixture, so carbon particles are not gaining access to oxygen. Solid carbon particles are bound to other various materials such as mechanical impurities, sulphates, condensates, and liquid fuel residues, some of them with high toxicity – such as polycyclic aromatic hydrocarbons (PAH). The cause of high solid carbon emissions is a significant inhomogeneity of the mixture up to the value λ = 0 inside the fuel droplets where oxygen absences up to λ = ∞ in the space where fuel does not even come. Therefore, solid carbon emissions highly depend on the quality of atomization of the fuel which is injected into the cylinder. The supply of oxygen required for oxidation is improved by increasing the total amount of the air in the cylinder. In Slovakia as well as in other countries (the Czech Republic, etc.), there have been recently multiple instances of removing catalysts from vehicles by services, deactivation of diesel particulate filters (DPF, SCR), or vehicle control units reprogramming (tuning), or a combination of the previous actions. From the perspective of a company and its interest, it is a large interference with vehicle design, and it also affects the relationship with the environment. From the perspective of society, it is irrelevant whether it is the individual's conduct or the conduct of certain groups. This article explores the possible solutions for checking the illegal diesel engines conversion due to deactivation of particulate matter filters in exhaust systems of diesel engines as well as the current legislation that covers this issue.

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KROPIWNICKI, Jacek, Przemysław DOMINICZAK, Zbigniew KNEBA, Sławomir MAKOWSKI, Janusz CIEŚLIŃSKI e Maciej ZIÓŁKOWSKI. "Analysis of the possibilities of using of DME fuel in motor boat drive systems". Combustion Engines 171, n. 4 (1 novembre 2017): 74–80. http://dx.doi.org/10.19206/ce-2017-413.

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The characteristics of alternative fuel for diesel: dimethyl ether (DME) and an analysis of the potential to reduce emissions of toxic compounds by the engines when running on this fuel have been presented in this work. Basic types of design solutions of gas supply and control systems, possible for use in internal combustion engines with DME supply have been also presented. The paper presents a study of the legislation and an analysis of the feasibility of the system storage and fueling DME on board small vessels.

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Y, Kryzhanivskyi, Kryshtopa S, Kryshtopa L, Hnyp M e Mykytii I. "EXPERIMENTAL STUDIES OF DIESEL ENGINE INDICATORS WORKING ON THE MIXTURES OF BIODIESEL FUELS RECEIVED FROM BLUE-GREEN ALGAE". National Transport University Bulletin 1, n. 46 (2020): 153–62. http://dx.doi.org/10.33744/2308-6645-2020-1-46-153-162.

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This article considers usage of blue-green algae as biomaterials for creation of motor biofuels. The object of the study is effect of blended biodiesel fuels from blue-green algae on the environmental and energy performances for the diesel engine. The purpose of the work is experimental study of changes of power and ecological characteristics of automobile diesel engines using petroleum diesel and their mixtures with biofuels derived from blue-green algae. Methods of research are experimental, laboratory ones. As a result of performed experimental researches dependences of changing of the effective engine power on the use of diesel fuel and a mixture of diesel fuel with the received bioactive supplements based on methyl esters of the lipid fraction of blue-green algae Chroococcfles in the amount of 5, 10 and 20% were established. It has been experimentally established that the effective power of an engine using a mixture of diesel fuel with the derived bioactive compounds based on methyl esters of the lipid fraction of blue-green algae Chroococcfles in the amount of 5, 10 and 20% will decrease by an average of 0,9, 1,8 and 3,5 %. It has been experimentally determined that the content of carbon monoxide in the use of a mixture of diesel fuel with the derived bioactive compounds based on methyl esters of the lipid fraction of blue-green algae Chroococcfles in the amount of 5, 10 and 20 % will decrease by an average of 6,5, 13,9 and 28,7 %. The obtained results allow to optimize the choice of fuels for power systems of internal combustion engines and to reduce emissions of harmful substances in exhaust gases of automobile diesel engines. KEY WORDS: BIOFUELS, DIESEL ENGINE, ALGAE, POWERFUL CHARACTERISTICS, ENVIRONMENTAL INDICATORS.

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Knaub, Ludmila. "Improvement of mixing processes in diesel engines". Technology audit and production reserves 3, n. 1(59) (30 giugno 2021): 16–18. http://dx.doi.org/10.15587/2706-5448.2021.232050.

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The object of research is gas-dynamic vortex processes in heterogeneous polydisperse flows. One of the most problematic issues in engine building is the completeness of combustion and the rate of fuel burnout in the given coordinates on the allotted hourly interval in the combustion chamber. These indicators, in turn, determine stringent requirements for used fuels in terms of thermophysical parameters that affect sawing, evaporation and mixing with an oxidizer. In the course of the study, methods of mathematical modeling were used based on the theory of similarity. Methods have been developed for preparing a combustible mixture for detonation-free combustion of a cheap alternative fuel. A method for assessing the quality of spraying low cetane fuel is proposed. A mathematical model is obtained for calculating the change in the parameters of the quality of atomization and the differential characteristics of fuel injection. This is necessary for theoretical studies of gas-dynamic processes in additional power systems for diesel engines in an unsteady three-dimensional flow with variable parameters of a polydisperse flow of a combustible mixture. It has been proven that with a decrease in the camshaft rotational speed, the injection speed will be insufficient to achieve the required spray quality due to a decrease in the speed. This made it possible to redesign the additional system using a separate dual fuel supply. Research samples of an additional power supply system for the ЯМЗ–24 ОН diesel engine (Yaroslavl Motor Plant, Russia) have been developed. Comparative tests of the engine operation on stable gas condensate with the main fuel equipment and an additional system have been carried out. Oscillograms of the tests were obtained and analyzed. The research results provided the basis for the use of low cetane cheap gas condensate in diesel engines. This will improve the economic, power and environmental performance of the engines. Compared to standard cetane fuels, the price of fuel will decrease by 40 %, engine power will increase by 20 %, and the environmental performance of exhaust gases will decrease by 10–30 %.

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Più fonti

Tesi sul tema "Diesel motor – Fuel systems"

Arter, Micah. "The effects of diesel fuel density on fuel consumption measurements of portable in-use emissions measurement systems". Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5509.

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Thesis (M.S.)--West Virginia University, 2007.
Title from document title page. Document formatted into pages; contains vii, 91 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 60-62).

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Tran, Xuan-Thien Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Modelling and simulation of electronically controlled diesel injectors". Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2003. http://handle.unsw.edu.au/1959.4/19278.

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The study presents a one-dimensional, transient and compressible flow models of a commercial Common Rail Injector (CRI) and a prototype of a single-fuel Hydraulically actuated Electrically controlled Unit Injector (HEUI) developed at the University of New South Wales (UNSW) in conjunction with local industry. The unique feature of the UNSW HEUI is the fact that it uses diesel fuel as the driver for pressure amplification within the unit injector. The work undertaken is part of a wider study aimed at optimization of the design of diesel injectors for dual-fuel systems to reduce green house gas emissions. The contribution of this thesis is the development of the model of the UNSW HEUI injector, which can be used to investigate possible modifications of the injector for its use in dual-fuel injection systems. The developed models include electrical, mechanical and hydraulic subsystems present in the injectors. They are based on Kirchhoff??s laws, on the mass and momentum conservation equations and on the equilibrium of forces. The models were implemented in MATLAB/SIMULINK graphical software environment, which provides a high degree of flexibility and allows simulation of both linear and nonlinear elements. The models were used to perform sensitivity analysis of both injectors. The sensitivity analysis has revealed that the temperature of the solenoid coil is one of the critical parameters affecting the timing and the quantity of the fuel injection of both injectors. Additional critical parameters were found to be the dimensions of the piston of the CRI, the stiffness of the needle spring of the HEUI and the dimensions of the intensifier of the HEUI. The models also revealed that in the case of pilot injections the speed of the solenoid is the major limiting factor of the performance. The developed models provide better understanding of the issues and limitations of the injectors. They give detailed insight into their working principles. The investigations of the models permit making quantitative analysis of the timing of the HEUI solenoid and to evaluate the proposed change of the direction of the pressure acting on the HEUI solenoid plunger.

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Chien, Jui-Yu. "The future and outlook of alternative fuel bus industry and its marketing strategy". CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2332.

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According to the current governmental regulations, all diesel buses will be replaced in the United States and the European market within the next ten years. There are over 60,000 buses in the United States and each year over 3,000 new buses of approximately 40 feet in length are purchased. The bus market has a growth rate of four to five percent per year over the last two years. The improvements in technology offered by United States companies prove unsatisfactory in terms of bus performance and the emissions of new buses. The energy crisis in the United States and concern over the health hazards of the diesel fuel exhaust gases and particulates, alternative fuel vehicles are in great demand in the transit market world wide.

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Toral, del Rio Maria Isabel. "An analysis of the influence of phosphorus poisoning on the exhaust emission after treatement systems of light-duty diesel vehicles". Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/697.

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Climate change has become a discussion topic of exponentially increasing urgency and importance amoung world leaders of all disciplines. These changes are brought about by the emission of so-called Greenhouse gases from various human activities. The primary cause of CO2 emissions is the burning of the Earth’s supply of nonrenewable natural fossil fuels like coal, oil and natural gas. The world first agreed on the prevention of “dangerous” climatic changes at the Earth Summit in 1992. The Kyoto Protocol of 1997 was the first step toward protection of the atmosphere and prescribes restrictions on emission pollutants. Since then the vehicle gas emissions are being controlled by means of different gas emissions norms, like the European Union Norm in Europe. The automotive manufacturers and suppliers are collectively working on reducing overall vehicle emissions. They are focusing on several different emission limiting possibilities, for example improved engine design, special fuel development and exhaust gas treatment systems. The exhaust gas treatment process requires continuous controlling and management of the exhaust gas emissions while driving a vehicle. Certain factors such as high emission temperatures have a negative influence on the life span of these systems. Their functionality and durability is also known to be reduced by the presence of chemical poisoning species like sulphur, phosphorus, zinc and calcium. The chemical poisoning species are produced during combustion of fuel and engine oil. They are therefore contained in the exhaust emissions and can poison the catalyst when passing over it. Phosphorous poisoning is particularly problematic and should be reduced considerably. This study involves the investigation of the phosphorous poisoning process and aims to provide clarity regarding the influences of different fuel and oil compositions on the severity of the process. Engine oil and biodiesel are two major sources of phosphorous poisoning. The phosphorus contained in biodiesel fuel is a natural component and can be minimized during the refining procedure. In contrast to others studies, the biodiesel fuel used during this project was SME (Soya Methyl Ester) with a 20% biodiesel content. This choice of fuel was made because of the increasingly important role that this type of biodiesel is playing in the European market and the future tendency to increase the percentage of biodiesel in the mixture with standard diesel fuel. The phosphorus contained in engine oil is a necessary additive to retain the antioxidant and anti-wear properties of the oil. This study examined the poisoning influences from the most commonly used phosphorus containing oil additive, Zinc Dithiophosphates (ZDDP), as well as a Zn-free, phosphorus containing anti-wear oil additive. This formulation provides information about the phosphorus poisoning process as caused by the engine oil in the absence of Zn in the oil additives. The results show how the phosphorus content in biodiesel fuel affects the functionality of the exhaust gas treatment systems and the importance of reducing the permitted content of phosphorus contained in the fuel. Reducing the phosphorus content in the fuel will conserve the functionality of the exhaust gas treatment systems during their operational life and thereby protect the environmental from emission pollutants. It also provides insight into the differences in the poisoning processes when the phosphorus deposited on the catalyst comes from biodiesel fuel and when it comes from the engine oil. Finally the results also illustrate the influence of different phosphorous forms contained in engine oil additives on the catalyst poisoning process. This information could be used for the development of new oil additive formulations.

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Douxchamps, Pierre-Alexis. "Diesel thermal management optimization for effective efficiency improvement". Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210123.

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This work focuses on the cooling of diesel engines. Facing heavy constraints such

as emissions control or fossil energy management, political leaders are forcing car

manufacturers to drastically reduce the fuel consumption of passenger vehicles. For

instance, in Europe, this fuel consumption has to reach 120 g CO2 km by 2012, namely 25 % reduction from today's level.

Such objectives can only be reached with an optimization of all engines components

from injection strategies to power steering. A classical energy balance of an internal

combustion engine shows four main losses: enthalpy losses at the exhaust, heat

transfer to the cylinder walls, friction losses and external devices driving. An

optimized cooling will improve three of them: the heat transfer losses by increasing

the cylinder walls temperature, the friction losses by reducing the oil viscosity and

the coolant pump power consumption.

A model is first built to simulate the engine thermal behavior from the combustion

itself to the temperatures of the different engine components. It is composed by two

models with different time scales. First, a thermodynamic model computes the in cylinder

pressure and temperature as well as the heat flows for each crank angle.

These heat flows are the main input parameters for the second model: the nodal

one. This last model computes all the engine components temperatures according

to the nodal model theory. The cylinder walls temperature is then given back to

the thermodynamic model to compute the heat flows.

The models are then validated through test bench measurements giving excellent

results for both Mean Effective Pressure and fluids (coolant and oil) temperatures.

The used engine is a 1.9l displacement turbocharged piston engine equipped with

an in-cylinder pressure sensor for the thermodynamic model validation and thermocouples

for the nodal model validation.

The model is then used to optimize the coolant mass flow rate as a function of

the engine temperature level. Simulations have been done for both stationary

conditions with effciency improvement up to 7% for specific points (low load, high

engine speed) and transient ones with a heating time improvement of about 2000s.

This gains are then validated on the test bench showing again good agreement.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

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Kotze, Johan. "A comparative study on the performance of biodiesel in a modern 1.9L turbo diesel engine". Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4293.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: This thesis comprises of the testing and evaluation of a modern diesel engine running on both biodiesel and mineral diesel on the upgraded Bio-fuels Testing Facility (BTF) at Stellenbosch University. The project was motivated by the need to install a modern diesel engine onto the existing BTF test rig for biodiesel testing. In this project, the BTF was re-designed to support a new Volkswagen 1.9L TDI engine. The capabilities of the BTF were then expanded further by the implementation of a low-cost pressure indicating system, utilising an optical pressure transducer. During the testing of biodiesel, it was found that the calorific value of the biodiesel was 14% lower than that of the tested mineral diesel. The ignition quality (cetane index) of the biodiesel was also lower than that of the mineral diesel. Even so, the engine only experienced a maximum power loss of 4.2%. During heat-release analysis, it was determined that there was no significant difference in the combustion process of biodiesel and that of mineral diesel. The conclusion could be made that biodiesel is suitable for use in modern TDI engines. Testing validated the operation of the upgraded test cell, and in trials it was determined that the test results are highly repeatable. The pressure indicating set proved to have some limitations. Only simplified heat-release analyses and reasonable indicated power calculations could be performed with the indicating set. Recommendations were made for improvement in future research.
Centre for Renewable and Sustainable Energy Studies

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Strouhal, Pavel. "Aplikace vysokotlakého palivového systému na vznětový motor". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254441.

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This diploma thesis is focused on examining the development of a diesel tractor engine with a newer injection system, concretely common-rail system. Mainly it is about the application of the high pressure fuel pump, fuel rail and injectors. With regard to the used components are appropriate adjustments made on the engine, and then checked using the available calculations. Brief mention is given to the theoretical summary of the contemporary state of applied injection system and its development trend. Selecting adjustments is primarily based on observed operating load. However, it is also striving to their simplest implementation. An integral part of this work is drawing documentation of newly designed components.

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Tugsal, Umut. "FAULT DIAGNOSIS OF ELECTRONIC FUEL CONTROL (EFC) VALVES VIA DYNAMIC PERFORMANCE TEST METHOD". ProQuest, 2009. http://hdl.handle.net/1805/2094.

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Indiana University-Purdue University Indianapolis (IUPUI)
Electronic Fuel Control (EFC) valve regulates fuel flow to the injector fuel supply line in the Cummins Pressure Time (PT) fuel system. The EFC system controls the fuel flow by means of a variable orifice that is electrically actuated. The supplier of the EFC valves inspects all parts before they are sent out. Their inspection test results provide a characteristic curve which shows the relationship between pressure and current provided to the EFC valve. This curve documents the steady state characteristics of the valve but does not adequately capture its dynamic response. A dynamic test procedure is developed in order to evaluate the performance of the EFC valves. The test itself helps to understand the effects that proposed design changes will have on the stability of the overall engine system. A by product of this test is the ability to evaluate returned EFC valves that have experienced stability issues. The test determines whether an EFC valve is faulted or not before it goes out to prime time use. The characteristics of a good valve and bad valve can be observed after the dynamic test. In this thesis, a mathematical model has been combined with experimental research to investigate and understand the behavior of the characteristics of different types of EFC valves. The model takes into account the dynamics of the electrical and mechanical portions of the EFC valves. System Identification has been addressed to determine the transfer functions of the different types of EFC valves that were experimented. Methods have been used both in frequency domain as well as time domain. Also, based on the characteristic patterns exhibited by the EFC valves, fuzzy logic has been implemented for the use of pattern classification.

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Gill, Simaranjit Singh. "Controlling diesel NO_x & PM emissions using fuel components and enhanced aftertreatment techniques : developing the next generation emission control system". Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3643/.

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The following research thesis focuses on methods of controlling nitrogen oxides (NO_x) and particulate matter (PM) emissions emitted from a low temperature diesel exhaust. This involves studying the influence of hydrogen (H₂) on various aftertreatment devices such as hydrocarbon selective catalytic reduction (HC-SCR) over silver-alumina (Ag-Al₂O₃) catalysts for lean NO_x reduction, platinum diesel oxidation catalysts (DOC) for nitrogen dioxide (NO₂) production and passive regeneration methods for the diesel particulate filter (DPF). H₂ was implemented on-board either through diesel exhaust gas fuel reforming or via the simulation of ammonia (NH₃) dissociation. Both methods showed to be very effective in enhancing the activity of a silver HC-SCR catalyst for the reduction of NO_x with conversions reaching 90% with the aid of an upstream DPF. A combined DOC and catalysed DPF (cDPF) configuration proved promising for passive regeneration in the presence of reformed exhaust gas recirculation (REGR). The addition of H₂ over the DOC led to an improved catalyst light-off temperature and increased rate of oxidation for NO₂ production. Implementing filtered EGR (FEGR) removes the hydrocarbon (HC) and soot recirculation penalty, thus minimising particulate growth which results in a significantly reduced engine-out soot emission during exhaust gas recirculation (EGR) and hence, an improved NO_x/soot ratio. Introducing fuel components which enhance the cetane number and oxygenate the diesel fuel allow better control of the NO_x/soot trade-off with improved soot oxidation properties.

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Bilha, Vitor Meira. "Análise do processo de retificação interna aplicado à fabricação de bicos injetores diesel". Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1889.

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A utilização mais eficiente dos recursos naturais tem levado a indústria a aumentar a eficiência dos produtos manufaturados. Veículos de transporte Diesel estão incluídos neste cenário. Nos motores Diesel, um componente importante do sistema de injeção é o bico injetor. Uma legislação recente no Brasil introduziu limites de emissões EURO5. Estes novos parâmetros tiveram impacto no projeto do bico injetor com tolerâncias sendo reduzidas, em especial na área da sede do corpo do bico injetor, alterando o parâmetro funcional de pressão de abertura do produto. Neste cenário, o impacto desta superfície cônica retificada sobre a pressão de abertura é grande, bem como, sobre o desempenho do motor Diesel. Este estudo tem como objetivo analisar o defeito de topografia superficial típico e recorrente no processo de retificação interna cônica da sede do corpo dos bicos injetores. Um experimento planejado foi realizado de acordo com método Taguchi e determinou-se a relação sinal-ruído para dois parâmetros de topografia 2D. A superfície da sede também foi analisada utilizando análise topográfica 3D. Os resultados deste estudo incluem a indicação de possíveis causas do defeito recorrente, caracterização dos principais elementos do processo de retificação, caracterização da superfície retificada e otimização dos parâmetros do processo de retificação.
Industries of manufactured products have increased their efficiency optimizing the natural resources usage and Diesel commercial vehicles are included in this scenario. For Diesel engines, one of the most important components of the injection system is the nozzle injector. In Brazil, EURO5 legislation was recently introduced, bringing new emission limits for Diesel engines. Because of this, the nozzle injector design has changed and some manufacturing tolerances were reduced, in special the body seat geometry. This also changed the nozzle opening pressure. In this new process, the body seat grinded conical surface impacts on this functional parameter and consequently the Diesel engine performance. This study has as target to analyze a recurrent defect in the internal conic grinding process of the nozzle body seat. A trial was performed in this process according to Taguchi method and signal / noise ratio for 2D topographic parameters were defined. The body seat surface was also analyzed using 3D topographic analysis. The results of this study include the possible cause of the recurrent failure, characterization of the ground surface, process main elements integrity assessment and optimization of the grinding process parameters.

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Più fonti

Libri sul tema "Diesel motor – Fuel systems"

F, Wellington B., a cura di. Diesel engines and fuel systems. 3^a ed. Melbourne: Longman Cheshire, 1992.

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-Ing, Bauer H. Dipl, e Robert Bosch GmbH, a cura di. Diesel-engine management. 3^a ed. Plochingen: Robert Bosch, 2004.

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Southwest Research Institute. Fuels and Lubricants Technology Dept. Diesel fuel lubricity requirements for LDD vehicles: Interim phase final report. Alpharetta, GA: Coordinating Research Council, Inc., 2009.

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Kershaw, John F. Diesel engine electronics and fuel management systems. Upper Saddle River, N.J: Pearson Prentice Hall, 2006.

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Wellington, B. F. Diesel engines and fuel systems. 4^a ed. Melbourne: Longman Australia, 1995.

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International Off-Highway & Powerplant Congress & Exposition (1985 Milwaukee, Wis.). Fuel injection equipment: Analysis and design. Warrendale, PA: Society of Automotive Engineers, 1985.

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Dagel, John F. Diesel engine and fuel system repair. 2^a ed. New York: Wiley, 1988.

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Diesel engine and fuel system repair. 3^a ed. Englewood Cliffs, N.J: Regents/Prentice Hall, 1994.

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N, Brady Robert, a cura di. Diesel engine and fuel system repair. 4^a ed. Upper Saddle River, N.J: Prentice Hall, 1998.

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Ochocki, Włodzimierz. Numeryczne sterowanie systemy wtrysku paliwa silników wysokoprążnych. Poznań: Wydawn. Poznańskiego Tow. Przyjaciół Nauk, 1994.

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Capitoli di libri sul tema "Diesel motor – Fuel systems"

Stone, Richard. "Diesel Engine Fuel Economy". In Motor Vehicle Fuel Economy, 54–80. London: Macmillan Education UK, 1989. http://dx.doi.org/10.1007/978-1-349-09399-1_3.

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Egler, Walter, Rolf Jürgen Giersch, Friedrich Boecking, Jürgen Hammer, Jaroslav Hlousek, Patrick Mattes, Ulrich Projahn, Winfried Urner e Björn Janetzky. "Fuel Injection Systems". In Handbook of Diesel Engines, 127–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-89083-6_5.

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Grieshabe, Hermann, e Jens Olaf Stein. "Overview of diesel fuel-injection systems". In Diesel Engine Management, 72–77. Wiesbaden: Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-03981-3_7.

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Projahn, Ulrich, Helmut Randoll, Erich Biermann, Jörg Brückner, Karsten Funk, Thomas Küttner, Walter Lehle e Joachim Zuern. "Fuel Injection System Control Systems". In Handbook of Diesel Engines, 175–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-89083-6_6.

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Stone, Richard. "Transmission Systems". In Motor Vehicle Fuel Economy, 81–118. London: Macmillan Education UK, 1989. http://dx.doi.org/10.1007/978-1-349-09399-1_4.

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Karathanassis, Ioannis K., Foivos (Phoevos) Koukouvinis e Manolis Gavaises. "Multiphase Phenomena in Diesel Fuel Injection Systems". In Energy, Environment, and Sustainability, 95–126. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0335-1_8.

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Pasel, Joachim, Remzi Can Samsun, Ralf Peters e Detlef Stolten. "Fuel Processing of Low-Sulfur Diesel for Fuel Cell Systems". In Renewable Energy in the Service of Mankind Vol I, 103–11. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17777-9_10.

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Khatri, Deepti, Rahul Goyal e Abhishek Sharma. "Effects of Silicon Dioxide Nanoparticles on the Combustion Features of Diesel Engine Using Water Diesel Emulsified Fuel". In Energy Systems and Nanotechnology, 119–30. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1256-5_8.

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Shrajber, Marina, Alexandr Grischenko, Valeriy Ivanov e Alexander Zarifyan. "Thermal and Stress–Strain State of the Diesel Locomotive Asynchronous Motor". In Lecture Notes in Networks and Systems, 269–77. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11058-0_26.

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Ovcharenko, Sergei, Oleg Balagin e Dmitrii Balagin. "Modelling of Heating Process of the High-Pressure Fuel Pipeline of the Fuel Equipment of Diesel Locomotives". In Lecture Notes in Networks and Systems, 271–79. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11051-1_26.

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Atti di convegni sul tema "Diesel motor – Fuel systems"

Sanada, Kazushi, e Tetsuro Miyazaki. "Application of DDVC Fuel Injection System to Ship Speed Control". In BATH/ASME 2016 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpmc2016-1760.

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This paper describes an application of direct drive volume control (DDVC) to ship speed control. The DDVC fuel injection device consists of an AC servo motor, a fixed-displacement oil-hydraulic pump, and an oil-hydraulic cylinder. The cylinder piston pushes a fuel pump to pressurize fuel and an injection valve opens to inject fuel into a combustion chamber. Timing and the quantity of fuel injection can be controlled by the electric signal added to the AC servo motor. In this paper, the DDVC fuel injection device is applied to engine speed control of marine diesel engine and ship speed control. A simulation model is made including a model of the DDVC fuel injection device, propeller model, and hull motion model. Firstly, engine speed control system is proposed. Stop injection angle is automatically adjusted according to engine speed error signal. Secondarily, ship speed control is proposed. Propeller pitch angle is used to control ship speed. Simulation study of these control systems are presented to show the capability of the DDVC fuel injection device for marine diesel engine.

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Ho¨hn, Bernd-Robert, Hermann Pflaum e Daniel Tomic. "Performance and Fuel Consumption of “CVT-Hybrid-Driveline”". In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95154.

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This paper presents results of a research project which is carried out at the Technical University Munich, Germany. In this project the “CVT-Hybrid-Driveline” is designed, manufactured and investigated in close cooperation with OEM (GM Powertrain Europe) and suppliers (EPCOS AG, ZF Friedrichshafen AG and ZF SACHS AG). The focus is put on reduction of fuel consumption at low additional cost for hybrid components. The “CVT-Hybrid-Driveline” is a hybrid car driveline using Diesel-engine, electric motor with double layer capacitors and a CVT-type transmission. The driveline is assembled into an OPEL VECTRA vehicle for investigations on practical use of this hybrid system. In addition the driveline is installed at test rig for detailed investigations on consumption, energy flow and control system behavior. The concept is presented and explained in this document. Based on simulation of the hybrid system the drivability is shown for various situations of driving; fuel consumption of the CVT-Hybrid is evaluated and discussed both for standard cycle and for specific driving course.

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Averbukh, M., A. Kuperman, G. Geula, S. Gadelovitch e V. Yuhimenko. "Combining Diesel Generators With Ultracapacitors to Enhance Stability and Reliability". In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37930.

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Diesel generator based auxiliary power units (DG-APU) are widely used in different civil and military applications. Fuel economy and service life are probably the most important issues concerning their operation. Controlling engine throttle position in accordance with the load power allows regulating fuel supply to the engine to optimize fuel consumption. Despite the advantage of the method, control stability is sacrificed in case of light load operation as follows. When the DG-APU is running with a light load, engine throttle position should be nearly closed in order to minimize fuel consumption. If a load step is applied in such situation, engine velocity may drop sharply until complete stop because of insufficient control system bandwidth. This is why velocity and throttle position of a DG-APU should not be decreased below some level even if load power is low to maintain reliability at the expense of increased specific fuel consumption. Moreover, for small diesel-generators the throttle position is usually fixed. Thereby, relatively wide range load power variations (typical for many of diesel-generator applications) cause excessive fuel consumption. The situation may be sufficiently improved by connecting ultracapacitors (UC) on the DG-APU output terminals, introducing additional inertia allowing smoothing engine velocity decrease during a sudden load increase thus providing more time to the control system to regulate throttle position. As a result, DG-APU would be operated much more efficiently at light loads without sacrificing stability. Moreover, the UC may be used at as starter motor power source, removing starting stress from electrochemical batteries. Present work investigates the improvements in UC-supported DG-APU fuel efficiency and stability compared to conventional technical solutions. The research is based on mathematical modeling of the entire system, verified by experiments. The results support the presented ideas and quantitatively demonstrate the improved fuel economy and reliability of small DG-APUs.

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Lawlor, Shawn P., Robert C. Steele e Peter Baldwin. "Advanced Supersonic Component Engine for Military Applications". In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27336.

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A 1500 kWe Brayton cycle engine is in development that has the efficiency of a diesel, but with the size, weight and maintenance attributes of a gas turbine. The Advanced Supersonic Component Engine (ASCE) combines many of the proven features of shock wave compression and expansion systems, commonly used in supersonic flight inlet and nozzle designs, with turbo-machinery practices employed in conventional axial flow gas turbines. The superior efficiency of the ASCE is a result of high pressure shock wave compression and supersonic expansion phenomena that produce high component efficiencies and a unique engine configuration that minimizes flow stream turning losses throughout the system. The engine employs a two stage counter-rotating configuration to achieve a 30:1 pressure ratio and a 42% simple cycle efficient engine to drive a high-speed direct drive permanent magnet (PM) electric motor/generator for all electric power and propulsion applications. The system promises a specific fuel consumption equal to or better than current reciprocating diesel engines in this size range, but with a 10:1 weight reduction and a 4:1 improvement in time-between-overall compared to marine diesel systems in this size range. This is a 2:1 increase in fuel efficiency at full power over existing gas turbines in this size range.

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Shiraishi, Keiichi, e Venky Krishnan. "Electro-Assist Turbo for Marine Turbocharged Diesel Engines". In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25667.

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Turbocharged diesel engines are widely used in the marine industry and have a significant impact on global CO2 and NOx emissions. Turbochargers are an integral component of any diesel engine and they play a critical role in their performance. Mitsubishi Heavy Industries (MHI) and Calnetix Technologies have developed a unique technology called the “Electro-Assist Turbo” (EAT). The EAT unit consists of a specially designed high speed permanent magnet motor directly mounted to the turbocharger rotating assembly. The high speed motor applies torque to the turbocharger rotor enabling it maintain or vary rotor speed at low engine exhaust flow rates in order to supply sufficient charge air to maximize engine performance. Turbocharged diesel engines suffer from inherent deficiencies at low engine speeds; there is not enough energy in the exhaust to produce an optimum and readily available level of boost for the engine intake air system at off-design points. This technology proves even more important as the majority of large marine vessels are now operating in a “slow steaming” part throttle mode. To date the majority of marine diesel engines use auxiliary air blowers (AAB) to supply additional air to the engine intake during off design point operation. These AABs are inefficient and not intended nor designed to be used in constant operation. The EAT unit can provide a higher discharge pressure at the same electrical power consumption as an AAB. This more efficient design with higher discharge pressure further improves fuel efficiency and eliminates the need to run an external piece of machinery during operation, thus lowering maintenance costs. This paper will provide an overview of the design, integration and initial testing of the 100kW Electro-Assist Turbo into a Mitsubishi Exhaust-gas Turbocharger (MET)-83 marine diesel turbocharger. In addition this paper will go over the custom designed aerodynamic motor housing structure that holds the non-rotating components without penalizing performance of the turbocharger, special software developed for the variable frequency drive system that enables the flexible operation of the high speed motor, and features of the high speed permanent magnet motor that allows for operation without any active cooling. Also, this paper will provide and discuss the initial test results of the EAT integrated into the MET-83 turbocharger along with engine testing results provided by MHI. Low cost designs will be discussed that enable turbochargers currently in operation to be retrofitted and the further improvements taking place to commercialize.

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Brown, Jacob A., John Mizia, Daniel B. Olsen e Bryan D. Wilson. "On-Engine Demonstration of Micro-Pilot Ignition System for a Cooper-Bessemer GMV-4TF". In ASME 2003 Internal Combustion Engine and Rail Transportation Divisions Fall Technical Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/icef2003-0762.

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This investigation assesses the benefits of retrofitting a diesel micro-pilot ignition system on a Cooper-Bessemer GMV-4TF two-stroke cycle natural gas engine with a 14” (36 cm) bore and a 14” (36 cm) stroke. The pilot fuel injectors are mounted through an adaptor in one of the spark plug holes in a set of dual-spark plug heads. A high pressure, common-rail, diesel fuel delivery system is employed and customizable power electronics control the current signal to the pilot injectors. Pilot fuel is supplied by a variable displacement, high-pressure pump that is driven with an electric motor. Software is developed that interfaces with the pump and controls and monitors the fuel rail pressure. Micro-pilot quantities from 11.5 to 20 mm3 (.0007 to .0012 in3) are explored at rail pressures from 200 to 1400 bar (2,900 to 20,300 psig). Three independent variables, pilot ignition timing, pilot fuel quantity, and pilot fuel rail pressure, are manipulated. An optimization sequence is performed to minimize total fuel consumption.

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Riis, Dan. "Developing Non-Gasoline Burning Outboard Motors for the UK MoD". In ASME 2005 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/icef2005-1223.

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The UK Ministry of Defence (MoD) operates a wide range of small, high performance boats, used in varying environments, and locations throughout the world. These boats primarily operate using outboard motors (OBMs) due to the optimum power to size and weight ratios they provide, and the ease of maintenance compared to inboard motor boats. The use of OBMs has, with the exception of a large and heavy 27hp diesel (compression ignition) OBM, necessitated the use of Petrol (CIVGAS - F67). This dependency evolved from the difficulty encountered developing a reliable compression ignition OBM over the full power range required (20–250hp) at acceptable power to weight/size ratios. Given the lack of a perceived market for such an engine, very little development work was done in this area in the private sector. The requirement to run OBMs on CIVGAS presents a number of problems for the MoD, including logistical, availability (especially for Special Forces), and safety (especially for HM Ships required to store the fuel on the upper decks). The Marine Propulsion Systems Integrated Project Team (MPS IPT) within MoD’s Defence Logistics Organisation (DLO), was therefore mandated to develop solutions aimed at removing MoD’s reliance on CIVGAS. This resulted in a two pronged approach investigating both micro-gas turbines and multi-fuel OBMs. This paper will present the issues encountered and the development work completed to-date developing multi-fuel reciprocating OBM technology. The primary focus has been developing direct injection, spark ignition multi-fuel OBM technology, capable of using petrol, AVTUR (F34), AVCAT (F44), diesel, and marine distillate oil (MDO - F76). The paper will discuss the project plan, the technologies involved, development work, including test and trials, and the way ahead for the future.

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Zhou, Yi, Kayvan Pazouki e Rose Norman. "The Modelling and Optimal Control of a Hybrid Propulsion System for an Ice-Capable Ship". In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95142.

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Abstract Due to the effect of global warming, navigation on the Northern Sea Route (NSR) has become a more economical and reliable choice for international cargo transportation. In some ways, global warming has increased the opportunity of shipping activities in the Arctic region and hence the need for ice-capable vessels. NSR shipping provides benefits for international trade, but challenges still exist. Although conventional direct drive propulsion system connected to 2 stroke marine engine is normally considered the most efficient approach for long-range transport, for icebreaking operation which requires prime movers to work at partial load, conventional mechanical propulsion systems generally have poor fuel efficiency and high emissions. Moreover, the harmful gases produced by ships trading in NSR have a significant impact on the Arctic climate. Moreover, a traditional mechanical drive icebreaker with a diesel engine is required to operate at high torque, low rpm during icebreaking operation. Thus conventional diesel engine that isn’t optimised to operate at this point would be inefficient and would produce black carbon due to incomplete combustion, which has the potential to cause ice, snow, and cloud albedo out of proportion with normal pattern, thus lead to serious impacts on the Arctic environment and eco-system. Arctic ship propulsion systems have been developing since the 19th century, with modifications such as the use of diesel electric propulsion systems and nuclear power propulsion systems which can ideally meet the requirements of ice breaking operation (low speed and high torque), however, drawbacks still exist in these systems, such as poor fuel efficiency at low speeds for diesel electric propulsion and for nuclear power, there are limitations such as high initial cost, management of nuclear waste and the fact that the required deep knowledge of nuclear technology is mastered by few countries. Hybrid propulsion is a new technology for ice-capable ships, which can address the partial loading efficiency problem in diesel-electric propulsion by charging and discharging a battery energy storage unit which can allow the ship to work in zero-emission mode in some sensitive areas. In this paper, detailed modelling, primary control strategies (voltage and frequency stability) and efficiency analysis of system components such as the motor, generator, battery and conversion devices etc. are and implemented in software, and then the whole power system is simulated with a secondary control strategy (load power sharing and battery aging concern) in both ice and open water load conditions. The results from the diesel electric system and hybrid system total fuel consumption within a target journey are compared to investigate the advantage of the hybrid system, which show up to a 40% fuel consumption reduction for hybrid propulsion arrangement. A tertiary control strategy for energy management is analysed and implemented in the system to further reduce system fuel consumption.

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Pham, T. H., P. P. J. van den Bosch, J. T. B. A. Kessels e R. G. M. Huisman. "Cost-Effective Energy Management for Hybrid Electric Heavy-Duty Truck Including Battery Aging". In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3729.

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Battery temperature has large impact on battery power capability and battery life time. In Hybrid Electric Heavy-duty trucks (HEVs), the high-voltage battery is normally equipped with an active Battery Thermal Management System (BTMS) guaranteeing a desired battery life time. Since the BTMS can consume a substantial amount of energy, this paper aims at integrating the Energy Management Strategy (EMS) and BTMS to minimize the overall operational cost of the truck (considering diesel fuel cost and battery life time cost). The proposed on-line strategy makes use of the Equivalent Consumption Minimization Strategy (ECMS) along with a physics-based approach to optimize both the power split (between the Internal Combustion Engine (ICE) and the Motor Generator (MG)) and the BTMS’s operation. The strategy also utilizes a quasi-static battery cycle-life model taking into account the effects of battery power and battery temperature on the battery capacity loss. Simulation results present an appropriate strategy for EMS and BTMS integration, and demonstrate the trade-off between the total vehicle fuel consumption and the battery life time.

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Wressell, D. L., L. K. Tartibu e F. K. Tekweme. "Development and Performance Assessment of a Hydraulic Hybrid System". In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70509.

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Abstract The automotive industry has for some years considered hydraulic regeneration systems for use in hybrid vehicles; combining the concurrent use of an internal combustion engine and a hydraulic system to reduce fuel consumption and increase performance. This study describes the development of a hydraulic hybrid system using a small passenger vehicle (SPV) model and a hydraulic hybrid pump/motor (P/M) model. A model of an SPV vehicle was developed and validated using MATLAB Simulink. Simulations were performed to analyse and test the performance of the hybrid system. This study addresses the gap related to the prediction of the performance of the hydraulic hybrid system for use on an SPV. A novel control system was developed to simulate the drive cycle and predict the fuel-saving of the hydraulic hybrid system. Variables included accumulator size, hydraulic P/M displacement and accumulator pre-charge, which were adjusted to optimise the hydraulic hybrid system. The Fuel consumption of the model before the implementation of the hybrid system was calibrated with the recorded fuel consumption of the test vehicle. The hydraulic hybrid system was then developed and implemented to the SPV model along with a revised control system. The fuel-saving of a novel hydraulic hybrid control was estimated using MATLAB Simulink. A controller was developed to manage the distribution of energy between the hydraulic system and the diesel engine. The effects of the hybrid system on the brakes and the engine demand were analyzed. The results indicated a 45% reduction in diesel engine demand and a 65% decrease in brake usage throughout the drive cycle. The model of the hydraulic hybrid passenger vehicle predicted a fuel saving of approximately 17%. This study shows that the hydraulic hybrid system can potentially improve fuel consumption and optimize engine performance in passenger vehicles.

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Rapporti di organizzazioni sul tema "Diesel motor – Fuel systems"

Chapman, Elana M., Andre L. Boehman, Kimberly Wain, Wallis Lloyd, Joseph M. Perez, Donald Stiver e Joseph Conway. IMPACT OF DME-DIESEL FUEL BLEND PROPERTIES ON DIESEL FUEL INJECTION SYSTEMS. Office of Scientific and Technical Information (OSTI), luglio 2002. http://dx.doi.org/10.2172/802864.

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Elana M. Chapman, Andre Boehman, Kimberly Wain, Wallis Lloyd, Joseph M. Perez, Donald Stiver e Joseph Conway. IMPACT OF DME-DIESEL FUEL BLEND PROPERTIES ON DIESEL FUEL INJECTION SYSTEMS. Office of Scientific and Technical Information (OSTI), aprile 2004. http://dx.doi.org/10.2172/828878.

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Lacey, Paul I., e Sidney J. Lestz. Fuel Lubricity Requirements for Diesel Injection Systems. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1991. http://dx.doi.org/10.21236/ada235972.

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Chan, A. K. Ignition assist systems for direct-injected, diesel cycle, medium-duty alternative fuel engines: Final report phase 1. Office of Scientific and Technical Information (OSTI), febbraio 2000. http://dx.doi.org/10.2172/753778.

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Kono, Naoki, Yoshikazu Kobayashi e Hiroshi Takeda. Effect of Fuel Properties on Diesel Exhaust Emissions From Vehicles Equipped With Advanced Aftertreatment Systems for Emission Reduction. Warrendale, PA: SAE International, settembre 2005. http://dx.doi.org/10.4271/2005-08-0489.

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Agrawal, Asha Weinstein, Hilary Nixon e Cameron Simmons. Investing in California’s Transportation Future: Public Opinion on Critical Needs. Mineta Transportation Institute, dicembre 2020. http://dx.doi.org/10.31979/mti.2020.1861.

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Abstract (sommario):

In 2017, the State of California adopted landmark legislation to increase the funds available for transportation in the state: Senate Bill 1 (SB1), the Road Repair and Accountability Act of 2017. Through a combination of higher gas and diesel motor fuel taxes, SB1 raises revenue for four critical transportation needs in the state: road maintenance and rehabilitation, relief from congestion, improvements to trade corridors, and improving transit and rail services. To help state leaders identify the most important projects and programs to fund within those four topical areas, we conducted an online survey that asked a sample of 3,574 adult Californians their thoughts on how the state can achieve the SB1 objectives. The survey was administered from April to August 2019 with a survey platform and panel of respondents managed by Qualtrics. Quota sampling ensured that the final sample closely reflects California adults in terms of key socio-demographic characteristics and geographic distribution. Key findings included very strong support for improving all transportation modes, reducing air pollution and greenhouse gas emissions from transportation, and more convenient options to travel without driving. Respondents placed particular value on better maintenance for both local streets and roads, as well as highways. Finally, the majority of respondents assessed all types of transportation infrastructure in their communities as somewhat or very good.

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Vehicle Surge Reduction Technology during Towing in Parallel HEV Pickup Truck. SAE International, marzo 2022. http://dx.doi.org/10.4271/2022-01-0613.

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This paper proposes a technology to reduce vehicle surge during towing that utilizes motors and shifting to help ensure comfort in a parallel HEV pickup truck. Hybridization is one way to reduce fuel consumption and help realize carbon neutrality. Parallel HEVs have advantages in the towing, hauling, and high-load operations often carried out by pickup trucks, compared to other HEV systems. Since the engine, motor, torque converter, and transmission are connected in series in a parallel HEV, vehicle surge may occur when the lockup clutch is engaged to enhance fuel efficiency, similar to conventional powertrains. Vehicle surge is a low-frequency vibration phenomenon. In general, the source is torque fluctuation caused by the engine and tires, with amplification provided by first-order torsional driveline resonance, power plant resonance, suspension resonance, and cabin resonance. This vibration is amplified more during towing. Therefore, this paper proposes two surge reduction technologies to help achieve fuel efficiency and surge at the same time during towing. One technology is a gear shift control that avoids engine operating zones where two or more resonance frequencies coincide, which is realized by changing the equivalent inertia via appropriate gear selection. The second technology is an anti-vibration control, which makes effective use of the hybrid system motors by adding motor torque to suppress the relative displacement between the driveline and the tires.

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