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Littérature scientifique sur le sujet « Engitec »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Engitec"

Kania, Henryk, et Mariola Saternus. « Evaluation and Current State of Primary and Secondary Zinc Production—A Review ». Applied Sciences 13, n^o 3 (3 février 2023) : 2003. http://dx.doi.org/10.3390/app13032003.

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This article presents the history of zinc, its production and demand. The quantity of zinc production, both primary zinc from ores and concentrates, and secondary zinc from scrap and zinc-rich waste, was discussed. A comprehensive economic analysis covers zinc prices in the years 1960–2021. The basic methods of obtaining zinc from ores, including pyrometallurgical (Imperial Smelting Process ISP, Kivcet, Ausmelt) and hydrometallurgical (roasting–leaching–electrowinning RLE, atmospheric direct leaching ADL, Engitec Zinc Extraction EZINEX, zinc pressure leach) and their short characteristics, are presented. The global zinc market and the main areas of its application were analyzed. Technologies used for the recovery of zinc from scrap are discussed along with their characteristics. Galvanized steel is the main source of secondary zinc, both in the galvanizing process and in the remelting of galvanized steel. It can be easily recycled with other scrap steel in the electric arc furnace (EAF) for steel production. Currently, with high volatility in the price of zinc, as well as its natural resources in the earth’s crust, recycling is an important activity, despite the fact that zinc concentrates have a relatively constant chemical composition, while the resulting zinc waste contains zinc in varying amounts.

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Lister, A. « II — A. Lister ». Journal of Navigation 38, n^o 3 (septembre 1985) : 431–35. http://dx.doi.org/10.1017/s0373463300032793.

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Several years ago, when Airbus Industrie launched their twin-engined A 300 Airbus, it became apparent that a new generation of long-range aircraft was about to add a different facet to the shape of international air travel. The enormous power available from the big fan engines coming into use meant that adequate performance was available even when an engine failure meant the loss of half the installed thrust. Coupled to this was a standard of fuel economy and tank capacity which meant that the new aircraft were capable of operating over ranges far in excess of those previously attained by twin-engined aircraft.

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Rubino, L., R. I. Crane, J. S. Shrimpton et C. Arcoumanis. « An electrostatic trap for control of ultrafine particle emissions from gasoline-engined vehicles ». Proceedings of the Institution of Mechanical Engineers, Part D : Journal of Automobile Engineering 219, n^o 4 (1 avril 2005) : 535–46. http://dx.doi.org/10.1243/095440705x6668.

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Health concerns over ultrafine (< 100 nm) particles in the urban atmosphere have focused attention on measurement and control of particle number as well as mass. Gasoline-engined as well as diesel-engined vehicles are likely to be within the scope of future particulate matter (PM) emission regulations. As a potential option for after-treatment of PM emissions from gasoline engines, the trapping performance of a catalysed wire-cylinder electrostatic trap has been investigated, first in a laboratory rig with simulated PM and then in the exhaust of a direct injection spark ignition engine. In the simulation experiments, the trap achieved capture efficiencies by total particle number exceeding 90 per cent at wire voltages of 7–10 kV, gas temperatures up to 400°C, and operating durations up to one hour, with no adverse effects from a catalyst coating on the collecting electrode. In the engine tests, at moderate speeds and loads, capture efficiency was 60–85 per cent in the homogeneous combustion mode and 50–60 per cent, of a much larger number of engine-out particles, in the stratified (overall-lean) mode. Gas residence time in the trap appeared to be a major factor in determining efficiency. The electrical power requirement and the effect on engine back-pressure were both minimal.

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Wilde, G. L. « A New Approach to the Design of the Large Turbofan Power Plant ». Proceedings of the Institution of Mechanical Engineers, Part G : Journal of Aerospace Engineering 209, n^o 2 (avril 1995) : 85–104. http://dx.doi.org/10.1243/pime_proc_1995_209_277_02.

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The lower direct operating costs of the Big Twin subsonic transports encourage the building of ever larger turbofan engines installed on the wings. The steadily improving reliability of the turbofans and the good safety statistics of twin-engined aircraft over many years encourages this trend. Fuel economy is still the dominant factor in determining the design layout of turbofan engines. It requires the combination of the highest possible thermal efficiency of the gas generator core of the engine with optimum propulsion efficiency of the power plant as a whole in cruise flight, allowing for engine nacelle drag and nacelle to wing interference drag. High thermal efficiency and high propulsion efficiency together, lead to relatively small volume flow rate gas generators and high volume flow rate propulsion fans. The resulting geometrical mismatch between the compressors and turbines of the principal turbomachinery components within the engine, introduces losses that penalize the performance gains expected from theoretical considerations of thermodynamics cycle and component efficiencies alone. The paper presents two possible turbofan design layouts intended to overcome the limitation of current turbofan power plant designs. The aim is to design a power plant with the highest thrust per unit frontal area combined with the highest air miles per gallon in cruise flight.

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Salama, Ramiz, et Mohamed ElSayed. « Basic elements and characteristics of game engine ». Global Journal of Computer Sciences : Theory and Research 8, n^o 3 (29 décembre 2018) : 126–31. http://dx.doi.org/10.18844/gjcs.v8i3.4023.

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Contemporary game engines are invaluable tools for game development. There are many engines available, each of them which excel in certain features. Game Engines is a continuous series that helps us to make and design beautiful games in the simplest and least resource way. Game drives support a wide variety of play platforms that can translate the game into a game that can be played on different platforms such as PlayStation, PC, Xbox, Android, IOS, Nintendo and others. There is a wide range of game engines that suit every programmer and designed to work on Unity Game Engine, Unreal Game Engine and Construct Game Engine. In the research paper, we discuss the basic elements of the game engine and how to make the most useful option among Game Engines depending on your different needs and needs of your game. Keywords: Game engine, game engine element, basics of game engine.

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Ke, Zhenying, Yang Xu et Zihao Guo. « Analysis of the social impact of heat engine and its future application ». IOP Conference Series : Earth and Environmental Science 1011, n^o 1 (1 avril 2022) : 012007. http://dx.doi.org/10.1088/1755-1315/1011/1/012007.

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Abstract This paper aims to evaluate the social impact of the heat engine and analyze the application of heat engines in the future. This paper starts with some background information on heat engines and the challenges of gas pollution and gas shortage. The concepts of efficiency and environmental friendliness of the heat engine are widely discussed, which speeds up the development of several kinds of heat engines. We discuss the application of heat engines in different industries from three main aspects: agriculture, marine engine, and aviation. They improve our daily life and provide the required energy to the community. Thermoacoustic Heat Engine (TAHE), Liquid Air Cycle Engines (LACE), and a new class of Heat engine without the expulsion of reaction mass are introduced in this paper. Furthermore, the article will cover some futures. One is artificial intelligence, and another one is about biofuel, which helps heat engines to have higher efficiency and less pollution, and also how heat engines are involved in the next decade.

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Biernat, Krzysztof, Izabela Samson-Bręk, Zdzisław Chłopek, Marlena Owczuk et Anna Matuszewska. « Assessment of the Environmental Impact of Using Methane Fuels to Supply Internal Combustion Engines ». Energies 14, n^o 11 (7 juin 2021) : 3356. http://dx.doi.org/10.3390/en14113356.

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This research paper studied the environmental impact of using methane fuels for supplying internal combustion engines. Methane fuel types and the methods of their use in internal combustion engines were systematized. The knowledge regarding the environmental impact of using methane fuels for supplying internal combustion engines was analyzed. The authors studied the properties of various internal combustion engines used for different applications (specialized engines of power generators—Liebherr G9512 and MAN E3262 LE212, powered by biogas, engine for road and off-road vehicles—Cummins 6C8.3, in self-ignition, original version powered by diesel fuel, and its modified version—a spark-ignition engine powered by methane fuel) under various operating conditions in approval tests. The sensitivity of the engine properties, especially pollutant emissions, to its operating states were studied. In the case of a Cummins 6C8.3 modified engine, a significant reduction in the pollutant emission owing to the use of methane fuel, relative to the original self-ignition engine, was found. The emission of carbon oxide decreased by approximately 30%, hydrocarbons by approximately 70% and nitrogen oxide by approximately 50%, as well as a particulate matter emission was also eliminated. Specific brake emission of carbon oxide is the most sensitive to the operating states of the engine: 0.324 for a self-ignition engine and 0.264 for a spark-ignition engine, with the least sensitive being specific brake emission of nitrogen oxide: 0.121 for a self-ignition engine and 0.097 for a spark-ignition engine. The specific brake emission of carbon monoxide and hydrocarbons for stationary engines was higher in comparison with both versions of Cummins 6C8.3 engine. However, the emission of nitrogen oxide for stationary engines was lower than for Cummins engines.

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MITIANIEC, Władyslaw, et Konrad BUCZEK. « Modification of four-stroke engine for operation in two-stroke cycle for automotive application ». Combustion Engines 162, n^o 3 (1 août 2015) : 3–12. http://dx.doi.org/10.19206/ce-116860.

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The main disadvantages of two-stroke engines such a big fuel consumption and big emission of hydrocarbons or carbon monoxide can be reduced by new proposal of design of two stroke engine based on four stroke engines. The paper describes the operation of high supercharged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice of valve timings, geometrical parameters of inlet and outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations and engine parameters are determined on the simulation process by use GT-Power program and CFD program for different engine configurations. The initial results included in the paper show influence of valve timing on engine work parameters and predicted exhaust gas emission. The simulation results show that the nitrogen oxides are considerably reduced in comparison to four-stroke engines because of higher internal exhaust gas recirculation. The innovation of this proposal is applying of variable valve timing with turbocharging system in the two-stroke engine and obtaining a significant downsizing effect. The conclusions shows the possibilities of applying two-stroke poppet valve engine as a power unit for transportation means with higher total efficiency than traditional engines with possible change of engine operation in two modes: two- and four stroke cycles. The main disadvantages of two-stroke engines such a big fuel consumption and big emission of hydrocarbons or carbon monoxide can be reduced by new proposal of design of two stroke engine based on four stroke engines. The paper describes the operation of high supercharged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice of valve timings, geometrical parameters of inlet and outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations and engine parameters are determined on the simulation process by use GT-Power program and CFD program for different engine configurations. The initial results included in the paper show influence of valve timing on engine work parameters and predicted exhaust gas emission. The simulation results show that the nitrogen oxides are considerably reduced in comparison to four-stroke engines because of higher internal exhaust gas recirculation. The innovation of this proposal is applying of variable valve timing with turbocharging system in the two-stroke engine and obtaining a significant downsizing effect. The conclusions shows the possibilities of applying two-stroke poppet valve engine as a power unit for transportation means with higher total efficiency than traditional engines with possible change of engine operation in two modes: two- and four stroke cycles.

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Rabeta, Bismil, Mohammad A.F Ulhaq, Aswan Tajuddin et Agus Sugiharto. « Simulasi Graphical User Interface Analisis Termodinamika Mesin Turboprop Menggunakan Perangkat Lunak Matlab R2020a ». Jurnal Teknologi Kedirgantaraan 6, n^o 2 (1 septembre 2021) : 31–50. http://dx.doi.org/10.35894/jtk.v6i2.44.

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A turboprop engine is a hybrid engine that delivers thrust or jet thrust and also drives the propeller. This is basically similar to a turbojet except the turbine works through the main shaft which is connected to the reduction gear to rotate the propeller in front of the engine. This research was conducted to determine the development of engine performance in thermodynamic analysis so as to know the value of each parameter on a engine that has been developing for 20 to 50 years with different engine manufacturing. So that in this study a comparison of the thermodynamic analysis of the TPE-331, PT6A-42 and H85-200 engines was carried out. In the TPE331-10, PT6A-42, and H85-200 turboprop engines the value of fuel to air ratio and shaft work increases with increasing altitude while compressor work, fuel flow rate, shaft power, propeller thrust, jet thrust, total thrust, equivalent engine power and ESFC decrease with increasing altitude. Furthermore, the turbine's working value is relatively stable as the altitude increases. After that, the value of compressor work and turbine work on the PT6A-42 engine was greater than that of the TPE331-10, and H85-200 engines. However, the value of the fuel to air ratio, fuel flow rate, shaft power, jet thrust, equivalent engine power and ESFC on the H85-200 engine was greater than the TPE331-10 and PT6A engines. Furthermore, at sea level, the value of the axle, propeller thrust, and total thrust on the H85-200 engine is greater than that of the TPE331-10 and PT6A-42 engines but at an altitude of 25,000 ft, the PT6A-4 engine has a greater value than that of the TPE331-10 and PT6A-42 engines. TPE331-10, and H85-200 engines.

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Shokrollahihassanbarough, Farzad, Ali Alqahtani et Mirosław Wyszynski. « Thermodynamic simulation comparison of opposed two-stroke and conventional four-stroke engines ». Combustion Engines 162, n^o 3 (1 août 2015) : 78–84. http://dx.doi.org/10.19206/ce-116867.

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Today’s technology leveraging allows OP2S (Opposed Piston 2-Stroke) engine to be considered as an alternative for the conventional four-stroke (4S) engines as mechanical drive in various applications, mainly in transportation. In general, OP2S engines are suited to compete with conventional 4-stroke engines where power-to-weight ratio, power-to-bulk volume ratio and fuel efficiency are requirements. This paper does present a brief advent, as well as the renaissance of OP2S engines and the novel technologies which have been used in the new approach. Also precise thermodynamic benefits have been considered, to demonstrate the fundamental efficiency advantage of OP2S engines. Hence, simulations of two different engine configurations have been taken into consideration: a one-cylinder opposed piston engine and two-cylinder conventional piston four-stroke engine. In pursuance of fulfilling this goal, the engines have been simulated in AVL Boost™ platform which is one of the most accurate Virtual Engine Tools, to predict engine performance such as combustion optimization, emission and fuel consumption. To minimize the potential differences of friction losses, the bore and stroke per cylinder are taken as constant. The closed-cycle performance of the engine configurations is compared using a custom analysis tool that allows the sources of thermal efficiency differences to be identified and quantified. As a result, brake thermal efficiency, power and torque of OP2S engine have been improved compared to conventional engines while emission concern has been alleviated.

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Thèses sur le sujet "Engitec"

Joo, Won-Gu. « Intake/engine flowfield coupling in turbofan engines ». Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319865.

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Boswell, Michael John. « Gas engines for domestic engine-driven heat pumps ». Thesis, Oxford Brookes University, 1992. http://radar.brookes.ac.uk/radar/items/37f7ed18-4b86-6ab3-8ba6-1c27947fb1ce/1.

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An experimental and theoretical investigation has been undertaken into the performance of a small prototype, water-cooled, gas-fuelled engine designed for use as a domestic heat pump prime mover. In light of the application, fuel type and capacity, both experimental and theoretical study of similar engines is at best poorly documented in the literature. A comprehensive engine test facility has been set up, incorporating extensive calorimetry, a separate lubrication system, emissions monitoring and high speed data acquisition for in-cylinder pressure measurement and analysis. Two new experimental cylinder heads have been designed together with new induction and exhaust systems, both to improve performance and to enable further investigation of the combustion process. A preliminary parametric study of the combustion process established that the thermal efficiency and emission levels are strongly dependent on operational and design variables and that a lean, fast-burning combustion process in a slow speed engine coupled with careful control of other operating variables had the potential for improving efficiency, reducing emissions, and lowering frictional losses and noise levels with enhanced durability. Accordingly, new information has been obtained relating to rates of heat release, energy flows and emission levels over a wide range of design and operating conditions with utility for and consistent with an envelope of conditions appropriate to such a lean burn strategy. Modelling techniques have been developed and used as diagnostic tools in conjunction with the experimental data to investigate the influence of operating and design variables on rates of heat release and energy flows. The models have been validated using the experimental data over a wide range of operating conditions and incorporated into a thermodynamic engine model for use as a sub-model in an overall heat pump model. The experimental and theoretical programme has provided a valuable insight into the lean burn strategy and realised a considerable improvement in the performance of the prototype engine. The theoretical study benefits from a new approach to small gas engine design and development.

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Calnan, Peter John Courtney Benedict. « Analysis of new engine cycles for spark ignition engines ». Thesis, Brunel University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389985.

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Blaauw, Pieter. « Search engine poisoning and its prevalence in modern search engines ». Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002037.

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The prevalence of Search Engine Poisoning in trending topics and popular search terms on the web within search engines is investigated. Search Engine Poisoning is the act of manipulating search engines in order to display search results from websites infected with malware. Research done between February and August 2012, using both manual and automated techniques, shows us how easily the criminal element manages to insert malicious content into web pages related to popular search terms within search engines. In order to provide the reader with a clear overview and understanding of the motives and the methods of the operators of Search Engine Poisoning campaigns, an in-depth review of automated and semi-automated web exploit kits is done, as well as looking into the motives for running these campaigns. Three high profile case studies are examined, and the various Search Engine Poisoning campaigns associated with these case studies are discussed in detail to the reader. From February to August 2012, data was collected from the top trending topics on Google’s search engine along with the top listed sites related to these topics, and then passed through various automated tools to discover if these results have been infiltrated by the operators of Search Engine Poisoning campaings, and the results of these automated scans are then discussed in detail. During the research period, manual searching for Search Engine Poisoning campaigns was also done, using high profile news events and popular search terms. These results are analysed in detail to determine the methods of attack, the purpose of the attack and the parties behind it

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Lee, Byungho. « Methodology for rapid static and dynamic model-based engine calibration and optimization ». Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1117638435.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xv, 222 p.; also includes graphics. Includes bibliographical references (p. 211-222) Available online via OhioLINK's ETD Center

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Sanders, Matthew Graham. « Analytical applications of the peroxyoxalate chemiluminescence reaction ». Thesis, University of Plymouth, 1999. http://hdl.handle.net/10026.1/1832.

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The overall objectives of this thesis were to investigate the potential of the peroxyoxalate chemiluminescence (POOL) reaction for the quantitative detection of target analytes in non-aqueous matrices and to compare quantitative performance with fluorescence detection. The target analytes investigated were polycyclic aromatic hydrocarbons (PAHs) and aliphatic amines. These were selected as an important class of compounds in engine exhaust emissions and a detergent additive in diesel fuel respectively. Chapter one outlines the challenges of analysing petroleum products and engine exhaust emissions and discusses the potential of luminescence techniques, particularly chemiluminescence (CL), for the quantification of trace components. The chapter also reviews the technique of flow injection (FT) as a means of sample delivery for CL detection and as a potential technique for field deployment. Liquid chromatography techniques are described as a means of separation of complex matrices, e.g. fuels and engine exhaust particulates, in the laboratory prior to CL detection. The luminescence properties of several PAHs were investigated in Chapter Two. Optimum excitation and emission wavelengths for eleven PAHs in four different solvents were determined using a batch fluorescence technique. A FI approach was used to determine PAH concentrations using fluorescence and POCL detection. Two aryl oxalates; bis(2,4-dinitophenyl)oxalate and bis(2,4,6-trichlorophenyl)oxalate were compared for their suitability for PAH determinations and an investigation of the key variables (e.g. concentration of aryl oxalate and hydrogen peroxide, mobile phase composition and pH) affecting POCL was performed. Recommendations for the optimum conditions for the determination of PAHs by POCL detection were determined, A comparison between a photodiode based detection device and a low power (12V) photomultiplier tube was also described. In Chapter Three the procedure of using POCL detection as a post column liquid chromatography (LC) detector for PAHs has been considered. The performance of the POCL detection system was compared with wavelength programmed fluorescence. Both reversed and normal phase LC was investigated and the suitability of POCL detection with each approach was discussed. Additionally the procedure for the LC separation and analysis of SRM 1649 (Urban Dust/Organics) and SRM 1650 (Diesel Particulate Matter) was described. The relative performance of fluorescence and CL detection are discussed. Chapter four describes the principles of multivariate calibration of spectrophotometric data, and three commonly applied techniques (PCR, PLSI and PLS2). Fluorescence data was obtained for synthetic mixtures of PAHs containing two, three, four and five components. A procedure whereby individual spectra were 'glued' together before undergoing data analysis has been developed and the results obtained discussed. POCL emission spectra for five PAHs were acquired using a two-dimensional charge coupled device (CCD). The sensitivity of the CCD system toward POCL detection of PAHs and a multivariate investigation using benzo[a]pyrene and benzo[k]fluoranthene has been described. The potential of the fluorescence and CL approaches used has been discussed. Chapter five describes the aryl oxalate sulphorhodamine-101 CL reaction and its application to the determination of amines. A FI optimisation of the reaction parameters is presented together with some quantitative data for the detection of a homologous series of amines and dodecylamine (a commonly added detergent compound in diesel fuels). The application of the technique toward the detection of dodecylamine in a diesel fuel matrix and the potential as a field deployable technique was also considered.

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Kapadia, Bhavin Kanaiyalal. « Development Of A Single Cylinder SI Engine For 100% Biogas Operation ». Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/283.

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This work concerns a systematic study of IC engine operation with 100% biogas as fuel (as opposed to the dual-fuel mode) with particular emphasis on operational issues and the quest for high efficiency strategies. As a first step, a commercially available 1.2 kW genset engine is modified for biogas operation. The conventional premixing of air and biogas is compared with a new manifold injection strategy. The effect of biogas composition on engine performance is also studied. Results from the genset engine study indicate a very low overall efficiency of the system. This is mainly due to the very low compression ratio (4.5) of the engine. To gain further insight into factors that contribute to this low efficiency, thermodynamic engine simulations are conducted. Reasonable agreement with experiments is obtained after incorporating estimated combustion durations. Subsequently, the model is used as a tool to predict effect of different parameters such as compression ratio, spark timing and combustion durations on engine performance and efficiency. Simulations show that significant improvement in performance can be obtained at high compression ratios. As a step towards developing a more efficient system and based on insight obtained from simulations, a high compression ratio (9.2) engine is selected. This engine is coupled to a 3 kW alternator and operated on 100% biogas. Both strategies, i.e., premixing and manifold injection are implemented. The results show very high overall (chemical to electrical) efficiencies with a maximum value of 22% at 1.4 kW with the manifold injection strategy. The new manifold injection strategy proposed here is found to be clearly superior to the conventional premixing method. The main reasons are the higher volumetric efficiency (25% higher than that for the premixing mode of supply) and overall lean operation of the engine across the entire load range. Predictions show excellent agreement with measurements, enabling the model to be used as a tool for further study. Simulations suggest that a higher compression ratio (up to 13) and appropriate spark advance can lead to higher engine power output and efficiency.

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SHOJAEE, Maryam. « Modelling for the thermal degradation of engine oil in diesel engines ». Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385.

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Thermal oil oxidation is an important reason for the engine oil degradation in trucks. Having a comprehensive model that includes all the influential factors while it is feasible for being implemented in the ECUs, was aimed for this work. Therefore, the chemical investigating of the problem leaded to propose a first kinetic model and its thermal analysis caused modelling the oil thermal behaviour. The latter was developed for four compartments: Bearings, turbocharger, piston cooling and oil sump in the oil path through the lubrication system, because the highest oil temperature happens due to friction, combustion of fuels and exhaust gas transportation. Independency from the design parameters of the compartments and simplicity of models for the ECU implementation caused to investigate two various modelling hybrid approach: physical modelling and control theory approach. The first one was done for the bearings and piston cooling, and showed a high level of complexity leading to switch to the second approach. The latter was applied for all compartments while it satisfied requested requirements. To adjust and evaluate the models, an experimental campaign was devoted to acquiring the needed parameters with consideration of the project budget. Also using the previous simulation and experimental efforts at the company provided a possibility to develop flow rate sub-models used in the thermal modelling. The proposed model for all compartments, well predicted the oil thermal behaviour for both stationary and dynamic operating conditions. A comparison between the experimental data for the oil in the oil sump and turbo charger was done to show the reliability of the related models in both stationary and transient statuses. For the bearings, the simulation data for stationary condition were applied as a reference. The modelled oil temperature after piston cooling was compared to a set of experimental data that presented the probable temperature in some conditions close to stationary operating points.

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Duszynski, Marek. « Measurement of lubricant film thickness in reciprocating engines ». Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/8268.

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Kalinov, Pavel. « Intelligent Web Exploration ». Thesis, Griffith University, 2012. http://hdl.handle.net/10072/365635.

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The hyperlinked part of the internet known as "the Web" arose without much planning for a future of millions of publishers and countless pieces of online content. It has no in-built mechanism to find anything, so tools external to it were introduced: initially web directories and then search engines. Search engines are based on machine learning and have been extremely successful. However, they have some inherent limitations and cannot, by design, address some needs: they serve the "information locating" need only and not "information discovery". Search engine users have learned to accept them and in many cases do not realise how their search has been limited by shortcomings of the model. Before the advent of the search engine, web directories were the only information-finding tool on the web. They were manually built and could not compete economically with the effciency of search engines. This lead to their virtual extinction, with the effect that the "information discovery" need of users is no longer served by any major information provider. Furthermore, none of the dominant information-finding models account for the person of the user in any meaningful way controllable by (or even visible to) the user. This work proposes a method to combine a search engine, a web directory and a personal information management agent into an intelligent Web Exploration Engine in a way which bridges the gaps between these seemingly unrelated tools. Our hybrid, for which we have developed a proof-of-concept prototype [Kalinov et al., 2010b], allows users to both locate specific data and to discover new information. Information discovery is served by a web directory which is built with the assistance of a dynamic hierarchical classifier we developed [Kalinov et al., 2010a]. The category structure achieved by it is also the basis of a large number of nested search engines, allowing information locating both in general (similar to a "standard" search engine) and in a variety of contexts selectable by the user.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Information and Communication Technology
Science, Environment, Engineering and Technology
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Livres sur le sujet "Engitec"

Ulrich, Adler, dir. Motronic engine management : Engine management for spark-ignition engines. 3^e éd. Stuttgart : Robert Bosch, 1994.

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Engineers, Society of Automotive, et SAE International Congress & Exposition (1993 : Detroit, Mich.), dir. Tribology of engines and engine oils. Warrendale, Pa : Society of Automotive Engineers, 1993.

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GmbH, Robert Bosch, dir. Ignition : Engine management for spark-ignition engines. 3^e éd. Stuttgart : Robert Bosch, 1996.

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Val'eho, Mal'donado, et Nikolay Chaynov. Calculation of kinematics and dynamics of inline piston engines. ru : INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1058850.

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The textbook discusses the kinematics and dynamics of inline piston internal combustion engines with axial and deaxial crank mechanism. The necessary material for calculating the forces and moments acting in the engine is given, the balancing of engines, the construction of vector diagrams of pressure on the crankshaft bearings are considered, examples of calculations are given. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of higher educational institutions studying in the field of training "Energy engineering".

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GmbH, Robert Bosch, dir. Spark plugs : Engine management for spark-ignition engines. 4^e éd. Stuttgart : Robert Bosch, 1997.

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J, Allen David, United States. Dept. of Energy. Office of Vehicle and Engine Research and Development. et United States. National Aeronautics and Space Administration., dir. Testing of a variable-stroke stirling engine. Washington, D.C : U.S. Dept. of Energy, Conservation and Renewable Energy, Office of Vehicle and Engine R&D, 1986.

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I, Kurziner R., et United States. National Aeronautics and Space Administration., dir. Theory and design of flight-vehicle engines. Washington, DC : National Aeronautics and Space Administration, 1987.

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P, Badgley, Doup D et United States. National Aeronautics and Space Administration., dir. Adiabatic Wankel type rotary engine. [Washington, DC : National Aeronautics and Space Administration, 1989.

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Nguyen, Hung Lee. Performance and combustion characteristics of direct-injection stratified-charge rotary engines. [Washington, DC] : National Aeronautics and Space Administration, 1987.

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Nguyen, Hung Lee. Performance and combustion characteristics of direct-injection stratified-charge rotary engines. [Washington, DC] : National Aeronautics and Space Administration, 1987.

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Chapitres de livres sur le sujet "Engitec"

Decher, Reiner. « More Components : Inlets, Mixers, and Nozzles ». Dans The Vortex and The Jet, 137–54. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8028-1_13.

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AbstractTheintegrationof a gas turbine engine into a functioning jet propulsion engine for an airplane requires more components: inlets and nozzles. For the inlet, the special care exercised to avoid ingestion of boundary layers air is described. The design features of nozzles are described and extended to include discussion of more extreme configurations such as those found on rocket engines.

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Marlok, Hannes, Christian Trabold et Alexander Puck. « Engine Component Development for H2 Combustion Engines ». Dans Heavy-Duty-, On- und Off-Highway-Motoren 2021, 177–87. Wiesbaden : Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-38105-9_13.

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Decher, Reiner. « Propulsion for Flight : Power or Thrust ? » Dans The Vortex and The Jet, 95–107. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8028-1_9.

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AbstractAn engine is required to provide the power necessary for overcoming the drag of flight. There are not many engine types available to perform that important function: they all have advantages and limitations. They share common features and are different in fundamental ways. The histories of their development paced the history of man’s ability to fly and the modern gas turbine engine is the climax of that progression toward today’s state of aviation. In this chapter we focus on the salient features of engines as they relate to flight.

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Li, Ruiguang, Meng Shen, Hao Yu, Chao Li, Pengyu Duan et Lihuang Zhu. « A Survey on Cyberspace Search Engines ». Dans Communications in Computer and Information Science, 206–14. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-33-4922-3_15.

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AbstractThis paper introduces the concept of cyberspace search engine, and makes a deep survey on 5 well-known search engines, say Shodan, Censys, BinaryEdge, ZoomEye and Fofa, by querying official websites, analyzing APIs, and making academic research. We discuss the following items in details: Supporting internet protocols, Total amounts of detected devices, Device information, Scanning frequency, System architecture, The third party databases, Probes distribution, etc. We give a comprehensive comparison of the detecting abilities and working principles of the cyberspace search engines.

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Calabretta, Michele, Alessandro Sitta, Salvatore Massimo Oliveri et Gaetano Sequenzia. « Simulation of Dynamic Stresses on High Performance Engine Valve Spring System Considering Coil Clashing Effect ». Dans Lecture Notes in Mechanical Engineering, 108–13. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_18.

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AbstractThe valve train plays a major role in the performance of internal combustion engines by controlling the combustion process and it is therefore one of the key aspects for increasing the efficiency of combustion engines. Considering the dynamics, the spring force must be high enough to reliably close the valve preventing from seating bouncing due to surge modes after the valve closure. On the other side, the spring force should be kept as low as possible in order to reduce the engine friction losses and consequently the fuel consumption. In the high-performance engines, the valve springs have to be designed and optimized for sustaining higher stresses with compact dimensions leading to critical material and manufacturing processes. This requires a reduction of moving masses and a strong focus on design and process optimization of the coil springs for reducing the mechanical load and the friction losses at low engine speed. At the same time, valve train should be reliable at high engine speed. The calculation of stresses and contact forces for moving parts under dynamic load is essential for durability analysis. A method to calculate the contact of moving masses is described and proposed to justify valve motions experimental results. To fully understand the failure mechanism of test bed reliability trials, the dynamic stresses have been calculated modeling the real springs’ shape. The contact forces have been reproduced considering the coil clash effects and the dynamic behavior of the flexible spring.

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Jacobs, Timothy J. « Internal Combustion Engines internal combustion engine , Developments internal combustion engine developments in ». Dans Encyclopedia of Sustainability Science and Technology, 5499–547. New York, NY : Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0851-3_430.

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Seaman, Bill. « The Engine of Engines – Toward a Computational Ecology ». Dans Integral Biomathics, 297–309. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28111-2_29.

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Fiedler, Torben, Joachim Rösler, Martin Bäker, Felix Hötte, Christoph von Sethe, Dennis Daub, Matthias Haupt, Oskar J. Haidn, Burkard Esser et Ali Gülhan. « Mechanical Integrity of Thermal Barrier Coatings : Coating Development and Micromechanics ». Dans Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 295–307. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_19.

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Abstract To protect the copper liners of liquid-fuel rocket combustion chambers, a thermal barrier coating can be applied. Previously, a new metallic coating system was developed, consisting of a NiCuCrAl bond-coat and a Rene 80 top-coat, applied with high velocity oxyfuel spray (HVOF). The coatings are tested in laser cycling experiments to develop a detailed failure model, and critical loads for coating failure were defined. In this work, a coating system is designed for a generic engine to demonstrate the benefits of TBCs in rocket engines, and the mechanical loads and possible coating failure are analysed. Finally, the coatings are tested in a hypersonic wind tunnel with surface temperatures of 1350 K and above, where no coating failure was observed. Furthermore, cyclic experiments with a subscale combustion chamber were carried out. With a diffusion heat treatment, no large-scale coating delamination was observed, but the coating cracked vertically due to large cooling-induced stresses. These cracks are inevitable in rocket engines due to the very large thermal-strain differences between hot coating and cooled substrate. It is supposed that the cracks can be tolerated in rocket-engine application.

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Alshmrany, Kaled M., Mohannad Aldughaim, Ahmed Bhayat et Lucas C. Cordeiro. « FuSeBMC v4 : Smart Seed Generation for Hybrid Fuzzing ». Dans Fundamental Approaches to Software Engineering, 336–40. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99429-7_19.

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AbstractFuSeBMC is a test generator for finding security vulnerabilities in C programs. In Test-Comp 2021, we described a previous version that incrementally injected labels to guide Bounded Model Checking (BMC) and Evolutionary Fuzzing engines to produce test cases for code coverage and bug finding. This paper introduces an improved version of FuSeBMC that utilizes both engines to produce smart seeds. First, the engines run with a short time limit on a lightly instrumented version of the program to produce the seeds. The BMC engine is particularly useful in producing seeds that can pass through complex mathematical guards. Then, FuSeBMC runs its engines with extended time limits using the smart seeds created in the previous round. FuSeBMC manages this process in two main ways. Firstly, it uses shared memory to record the labels covered by each test case. Secondly, it evaluates test cases, and those of high impact are turned into seeds for subsequent test fuzzing. In this year’s competition, we participate in the Cover-Error, Cover-Branches, and Overall categories. The Test-Comp 2022 results show that we significantly increased our code coverage score from last year, outperforming all tools in all categories.

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Wallner, Thomas, et Scott A. Miers. « Internal Combustion Engines internal combustion engine , Alternative Fuels internal combustion engine alternative fuels for ». Dans Encyclopedia of Sustainability Science and Technology, 5461–99. New York, NY : Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0851-3_865.

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Actes de conférences sur le sujet "Engitec"

Förster, Jürgen, Andrea Lohmann, Manfred Mezger et Klaus Ries-Müller. « Advanced Engine Misfire Detection for SI-Engines ». Dans International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1997. http://dx.doi.org/10.4271/970855.

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Dupraz, P., O. Sename et L. Dugard. « Engine torque estimation for DI diesel engines ». Dans 1999 European Control Conference (ECC). IEEE, 1999. http://dx.doi.org/10.23919/ecc.1999.7099697.

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Akc¸a, Serdar, Serdar Demir, Ian Pennington et Okan Ataman. « Engine Durability Test Cycle for Heavy-Duty Engines ». Dans ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25174.

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Dynamometer durability testing plays a very important role in engine design verification process as it is still the most reliable method to ensure the product quality before starting mass production. To ensure that the new engine as designed and manufactured will perform in a manner that increases customer satisfaction, the stresses present in the dynamometer durability test has to be representative of those an engine will meet in customer usage. Thus, it is an important task to derive proper test cycles for dynamometer tests as they should definitely be correlated to customer usage in order not to under/over-test the subject. Customer-Correlated General Durability (CCGD) test, which targets system-to-system interactions rather than component-specific or subsystem-specific failure modes, is developed in this manner. In current CCGD cycles used in engine companies, state speed/load residencies reflecting the overall lifetime driving of the engine of concern is taken into account with randomized ramp-up and ramp-down stages to cover transient driving conditions. The cycle creation method can be divided into two phases: Data Collection & Data Analysis. Also there are two types of data used: Vehicle Data & Customer Field Data to obtain real world customer usage profile.

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Yagi, Shizuo, Kazuo Fujiwara, Nobuhiko Kuroki et Yoshio Maeda. « Estimate of Total Engine Loss and Engine Output in Four Stroke S.I. Engines ». Dans International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1991. http://dx.doi.org/10.4271/910347.

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Kimmich, F., et R. Isermann. « Model based engine torque supervision for diesel engines using the engine speed signal ». Dans Proceedings of 2002 American Control Conference. IEEE, 2002. http://dx.doi.org/10.1109/acc.2002.1023929.

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Ap, N. S., et N. C. Golm. « Thermal Balance Between the Engine Oil and the Engine Coolant of Turbo Diesel Engines ». Dans International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1997. http://dx.doi.org/10.4271/970939.

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Shin, Y., et W. K. Cheng. « Engine-Out “Dry” Particular Matter Emissions from SI Engines ». Dans International Fuels & Lubricants Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1997. http://dx.doi.org/10.4271/972890.

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Carey, Lenard R., Denis C. Roberts et Harold Shaub. « Factors Influencing Engine Oil Consumption in Today's Automotive Engines ». Dans 1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1989. http://dx.doi.org/10.4271/892159.

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Mattarelli, E., et A. Muscio. « Potential of Thermal Engine Encapsulation on Automotive Diesel Engines ». Dans 7th International Conference on Engines for Automobile. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2005. http://dx.doi.org/10.4271/2005-24-067.

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Scafati, Ferdinando Taglialatela, Francesco Pirozzi, Francesco Carpentieri, Giuseppe Finizio, Francesco Nocerino et Leonardo Colombo. « A Smart Engine Management System for Low Emissions Motorcycle Engines ». Dans 8th International Conference on Engines for Automobiles. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2007. http://dx.doi.org/10.4271/2007-24-0053.

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Rapports d'organisations sur le sujet "Engitec"

Vakaliuk, Tetiana A., et Svitlana I. Pochtoviuk. Analysis of tools for the development of augmented reality technologies. [б. в.], juillet 2021. http://dx.doi.org/10.31812/123456789/4625.

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The article considers cross-platform products that should be used to develop augmented reality technolo- gies: Unreal Development, Kit, Unity, Godot, Engine, Cocos2D, MonoGame, Unreal Engine, Marmalade, and others. Also, the possibilities of known SDKs for the development of augmented reality applications (Wikitude, Vuforia, Kudan, Maxst, Xzimg, NyARToolkit, Metaio SDK) are given. It is established that for the development of augmented reality technologies can be used not only cross-platform engines but also sets of development tools. Such kits allow you to speed up and simplify the process of developing any program with elements of augmented reality. These advantages and disadvantages will help beginners to choose the most convenient tool for developing augmented reality technologies. In addition, the article attempts to identify criteria and indicators for the selection of such environments, as well as their expert evaluation.

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Victor Wong, Tian Tian, G. Smedley, L. Moughon, Rosalind Takata et J. Jocsak. Low-Engine-Friction Technology for Advanced Natural-Gas Reciprocating Engines. Office of Scientific and Technical Information (OSTI), novembre 2006. http://dx.doi.org/10.2172/907969.

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Victor Wong, Tian Tian, Luke Moughon, Rosalind Takata et Jeffrey Jocsak. LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES. Office of Scientific and Technical Information (OSTI), mars 2006. http://dx.doi.org/10.2172/890706.

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Victor W. Wong, Tian Tian, Grant Smedley et Jeffrey Jocsak. LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES. Office of Scientific and Technical Information (OSTI), septembre 2004. http://dx.doi.org/10.2172/862408.

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Victor W. Wong, Tian Tian et Grant Smedley. LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES. Office of Scientific and Technical Information (OSTI), août 2003. http://dx.doi.org/10.2172/822221.

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Cheng, Wai, Victor Wong, Michael Plumley, Tomas Martins, Grace Gu, Ian Tracy, Mark Molewyk et Soo Youl Park. Lubricant Formulations to Enhance Engine Efficiency in Modern Internal Combustion Engines. Office of Scientific and Technical Information (OSTI), avril 2017. http://dx.doi.org/10.2172/1351980.

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Hall, Matt, et Ron Matthews. On-Board Engine Exhaust Particulate Matter Sensor for HCCI and Conventional Diesel Engines. Office of Scientific and Technical Information (OSTI), septembre 2011. http://dx.doi.org/10.2172/1111424.

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Dandge, Ajay Ramlal, et Vishwas Vaidya. Early Warning System for Light Commercial Engines using EMOS (Engine MOnitoring System) Controller. Warrendale, PA : SAE International, septembre 2010. http://dx.doi.org/10.4271/2010-32-0120.

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Dennis Schmitt et Daniel Olsen. Systematic Engine Uprate Technology Development and Deployment for Pipeline Compressor Engines through Increased Torque. Office of Scientific and Technical Information (OSTI), septembre 2005. http://dx.doi.org/10.2172/890714.

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