Готові списки джерел за темами / Piston coating

Добірка наукової літератури з теми "Piston coating"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Piston coating"

1

Mar'in, Dmitriy, Il'mas Salahutdinov, Denis Molochnikov, Rail' Mustyakimov, and Ilnar Gayaziev. "RESULTS OF MOTOR TESTS OF EXPERIMENTAL GASOLINE INTERNAL COMBUSTION ENGINE." Vestnik of Kazan State Agrarian University 14, no. 4 (April 12, 2020): 64–68. http://dx.doi.org/10.12737/2073-0462-2020-64-68.

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Анотація:
Current trends in the engine industry are aimed at improving the power and fuel-economic indicators of an internal combustion engine (ICE). This, in turn, is accompanied by an increase in the mechanical and thermal load on the details of the cylinder-piston group (CPG). One of the most loaded parts of the CPG is the piston. Overheating of the piston leads to premature wear of rubbing surfaces, occurrence of piston rings and their breakdowns, jamming of pistons, burnouts of the piston bottom, etc. Modern technology can protect engine parts subject to thermal stresses, especially pistons, by using structural coatings or special insulating materials. The main idea of such a coating is to reflect thermal energy back into the combustion chamber, which should prevent the piston from overheating. Thermal protective coatings are applied by plasma and detonation methods, however, such coatings are destroyed during operation and therefore they are not widely used to reduce the temperature level of the piston. To improve the thermal insulation properties of the piston, it is proposed to form a heat-insulating coating on the working surfaces of the piston head by microarc oxidation (MAO). A distinctive feature of MAO is the participation in the process of covering formation of surface microdischarges that have a very significant and specific effect on the forming covering, as a result of which the composition and structure of the resulting oxidized layers are significantly different, and the properties are significantly increased compared to conventional anode films. Comparative motor tests, the results of which showed that an engine equipped with pistons with a heat-insulating coating on the working surfaces of the head, increase power by 5.3% and reduce fuel consumption by 5.7%, compared with an engine equipped with standard pistons.
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2

Thibblin, Anders, and Ulf Olofsson. "A study of suspension plasma-sprayed insulated pistons evaluated in a heavy-duty diesel engine." International Journal of Engine Research 21, no. 6 (October 3, 2019): 987–97. http://dx.doi.org/10.1177/1468087419879530.

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Анотація:
Thermal barrier coatings can be used to reduce the heat losses in heavy-duty diesel engines. A relatively new coating method for thermal barrier coatings is suspension plasma-spraying. Single-cylinder engine tests have been run to evaluate how heat losses to piston, cylinder head and exhausts as well as the specific fuel consumption are influenced by coating pistons with two different suspension plasma-sprayed thermal barrier coatings and one atmospheric plasma-sprayed thermal barrier coating, and comparing the results to those from an uncoated steel piston. The two suspension plasma-sprayed thermal barrier coatings showed reduced heat losses through the piston and less heat redirected to the cylinder head compared to conventional atmospheric plasma-sprayed thermal barrier coating, while one suspension plasma-sprayed coating with yttria-stabilized zirconia as top coat material showed increased exhaust temperature. However, the indicated specific fuel consumption was higher for all tested thermal barrier coatings than for an uncoated engine. The best performing thermal barrier coating with respect to indicated specific fuel consumption was a suspension plasma-sprayed coating with gadolinium zirconate as top coat material.
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3

Belov, Vyacheslav P., Dmitry V. Apelinsky, and Vadim N. Bezhenar. "Influence of heat-protective coatings on the temperature state of tractor diesel pistons." Izvestiya MGTU MAMI 16, no. 2 (January 18, 2023): 107–13. http://dx.doi.org/10.17816/2074-0530-106387.

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Анотація:
BACKGROUND: The paper presents the results of thermometry of pistons with the TsNIDI type combustion chamber (CC) of the D-240 and the D-245 tractor diesel engines. Various constructive and technological measures aimed at increasing the thermal resistance of pistons are considered. AIMS: To evaluate the effect of heat-protective coatings on the temperature state of pistons with the TsNIDI type combustion chamber. METHODS: Motor bench tests of the D-240 and the D-245 diesel engines, equipped with pistons with heat-protective coatings (HPC) on the bottom, were carried out. In the process of research, the influence of the HPC on the thermal state of the pistons as well as on the power and economic indicators of these diesel engines was studied. RESULTS: It is established that hard anodizing leads to a slight decrease in temperatures and their differences at characteristic points of the piston in stationary and non-stationary diesel operation modes. It is noted that the slow rise in temperature at the bottom of the piston is caused by a decrease in the amount of heat supplied to it due to the low thermal conductivity of the oxide layer. It is shown that the PN85Yu15 gas-plasma coating leads to a significant decrease in temperatures and their differences along the piston bottom. It is determined that this coating helps to reduce the specific effective fuel consumption due to the reduction of the ignition delay period in the combustion process. It is noted that a slower growth rate of temperatures and their differences, especially in the zone of the edge of the CC, should reduce the magnitude of thermal stresses, and therefore increase the thermal resistance of the experimental pistons. CONCLUSIONS: It is revealed that the most effective way to reduce the heat stress of the piston is the application of heat-protective coatings on its bottom. The influence of the abovementioned coatings on the nature of the temperature distribution and their differences in the piston head is investigated.
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4

Chitthaarth, M. R., and K. Manivannan. "Thermal Analysis of Ceramic Coated Aluminium Piston with Slots." Applied Mechanics and Materials 592-594 (July 2014): 786–90. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.786.

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Анотація:
The main aim is to control thermal expansion in aluminium piston at high working condition. A plasma sprayed ceramic coating (TBC) is applied on the piston crown as a top coat and NiCrAl is applied as the middle layer as bond coat to improve the addition strength between the top coat and the metal subtract layer as AlSi alloy; we introduce a thermal slot on the piston shrink to regulate the heat flow in piston and make it cooler. We analyse the piston with these two implementations to determine the thermal analysis of the piston. The results can be shown in the various comparisons of coating thickness of top coat with thermal slots on the piston shrink. Increase in coating thickness reduces the stress in the coatings. It is observed that 85°C increase in 0.8mm coat than the ordinary piston.
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5

Liu, Yu Wei, Wei Zheng Zhang, and Yuan Fu Cao. "Thermal Analysis of an Anodic Oxide Coating Diesel Engine Piston Using 3-D Finite Element Method." Advanced Materials Research 548 (July 2012): 450–55. http://dx.doi.org/10.4028/www.scientific.net/amr.548.450.

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Анотація:
According to the phenomenon that the piston’s reliability and durability have been significantly weakened due to its high temperature, hard anodizing is used to hinder the heat transfer from the combustion gas to the metal base of the piston. Thermal analyses are performed on pistons with different thicknesses of anodic oxide coatings. The effects of coatings on the thermal behaviors of the pistons are investigated. The numerical results are compared with each other. It has been shown that the maximum surface temperature of the coated pistons with anodic oxide coating which has low thermal conductivity are significantly improved. Also, considering the hard anodizing process, the 100 ~ 150μm thickness of the anodic oxide coating would meet the requirements of the piston’s reliability.
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6

Al-Bdeiri, Mahmood, Vladimir Krasilnikov, and Sergey Sergeev. "Modified quasi-stationary method for studying changes in transition temperatures of diesel engine pistons coated with heat-shielding materials." Proceedings of Irkutsk State Technical University 24, no. 5 (October 2020): 954–65. http://dx.doi.org/10.21285/1814-3520-2020-5-954-965.

Повний текст джерела
Анотація:
The purpose of the work is to identify complex transient heat flow paths in the combustion chamber of engine, significantly improve the models of diesel engine heat flow, and study the effect of aluminum oxide coating by the galvanic plasma method on short-term and long-term reactions of the piston head. The analysis of operation of aluminum alloy coated diesel engine piston is carried out using a modified quasi -steady method and a finite element method. A thermodynamic analysis is presented using energy and state equations with corresponding gas heat transfer. Time-dependent boundary conditions are set on the gas-blown surfaces of 2D finite element transition models of combustion chamber components. It is shown that this methodology can reveal complex transient paths of the heat flow in engine combustion chambers and distribution details of heat losses in various cooling media. Numerical simulation has shown that the maximum temperature increase relative to the uncoated piston is 64.3% for the coating thickness of 0.13 mm. Tests have shown that the coatings can endure up to 280 thermal cycles. It is found out that predictions of numerical simulation are in good agreement with the results of experiments conducted with repaired pistons. The experimental operation of Cummins КТА 38 engines at Chernogorsk and Vostochno-Beysk coal mines has shown that the engine equipped after repair with the piston coated with aluminum applied by the galvanic plasma method has been in operation for 2 years and 3 months, whereas its set overhaul period is 18,000 hours. Therefore, the proposed methodology allows to reduce temperature variations in the piston and, thereby increase the service life of engine pistons coated with the use of the thermal barrier coating technology.
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7

Sitdikov, V. M., N. Yu Dudareva, A. A. Ishemguzhin, and I. A. Dautov. "Emission control and reduction in the combustion chamber of an internal combustion engine." Trudy NAMI, no. 4 (January 3, 2023): 83–95. http://dx.doi.org/10.51187/0135-3152-2022-4-83-95.

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Анотація:
Introduction (problem statement and relevance). The task of emission control and reduction for internal combustion engines (ICE) is a relevant issue of the modern engine building. However, the catalytic converters potential is limited and almost exhausted. The paper authors study the possibility to partially reduce toxic emissions directly in the engine combustion chamber by means of the ceramic coating formed on the piston crown.The purpose of the paper is to study the influence of the coating formed by the method of microarc oxidation on the combustion chamber parts on the ICE exhaust toxicity.Methodology and research methods. The experimental method of research was applied. The research was carried out on the RMZ-551i engine. Engine tests were performed in various load modes: the rotation rate changed from 2000 to 6000 rpm, and the throttle opening amounted to 25, 50, 75 and 100% in each speed mode.Results. The paper presents experimental data proving the real possibility to decrease the ICE exhaust gas toxicity through formation of a ceramic coating on the piston crown. A relative decrease of carbon monoxide concentration in exhaust gases by 3.1% was noticed when using coatings on pistons compared to using standard pistons. Along with the decrease of CO amount, a relative increase of carbon dioxide (СО2) concentration by 2.1% is noticed.Practical significance. The provided experimental data obtained in the engine tests showed the possibility to partially reduce the amount of toxic components in exhaust gases directly in the combustion chamber by means of the coating on the piston crown formed by microarc oxidation method.
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8

Mahalingam, S., S. Ganesan, H. Yashik Ahammed, and V. Venkatesh. "Effect on Performance and Emission Analysis of Advanced Ceramic Material Coated Piston Crown Using Plasma Spray Coating Techniques." Applied Mechanics and Materials 766-767 (June 2015): 612–17. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.612.

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Анотація:
Advanced ceramic coating technologies are commonly used as metal coatings for internal combustion engine components and aerospace application. The thermal barrier coatings are being applied to the engine components to increasing life and improve the performance of the engine. This experimental study is focused on advanced ceramic material of Zirconia stabilized with the yttrium oxide (Zirconia 80% wt and Yttia 20 % by weight) applied on the piston crown for analyzing the performance and emission characteristics of the diesel engine. By using ceramics coated piston crown, the brake thermal efficiency and specific fuel consumption were improved as compared to that of the piston without coating. Exhaust emission level of CO, UHC and NOx are also considerably reduced using advanced ceramic metal coating techniques.
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9

Maryin, Dmitry, Andrei Glushchenko, Anton Khokhlov, Evgeny Proshkin, and Rail Mustyakimov. "Results of engine tests of an experimental gasoline internal combustion engine." BIO Web of Conferences 17 (2020): 00078. http://dx.doi.org/10.1051/bioconf/20201700078.

Повний текст джерела
Анотація:
To improve the power and fuel and economic performance of a gasoline internal combustion engine, it has been proposed to improve the insulating properties of the piston by forming a heat-insulating coating on the working surfaces of the piston head with a thickness of 25...30 μm using the microarc oxidation method. Comparative results of engine tests are carried out, which showed that an engine equipped with pistons with a heat-insulating coating on the working surfaces of the head increases power by 5.3 % and reduces hourly fuel consumption by 5.7 % compared to an engine equipped with standard pistons.
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10

Jayanth, P., and E. Sangeeth Kumar. "Investigation and Analysis of Wear Reduction in Piston Rings through Coating." Applied Mechanics and Materials 813-814 (November 2015): 874–79. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.874.

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Анотація:
In this study, the surface of a Piston Ring in the engine is coated with multilayered coating powder using plasma-spray technique, and its surface behavior is subsequently analyzed. The purpose of this study is to analyze the mechanical and thermal effects of surface coating for a Piston Ring during friction. Here specimens with and without coatings were prepared and then microstructure, hardness and corrosion tests were carried out. From the experimental results and Ansys results, it has been found that the coated specimen has improved the properties in improving the diesel engine performance. The results show less deformation and fewer scratches due to wear on the multilayer coated Piston Ring as compared to the uncoated one. The surfaces topography and the structure of the plasma spray coatings is observed on the scanning Electron microscope. The evaluation of the adhesion of coatings is made using the hardness test and also compared using the thermal barrier properties. Taking into account the results of measurements, one can state that the lowest wear and thermal resistance on piston rings by plasma spray coating.
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Більше джерел

Дисертації з теми "Piston coating"

1

Skytte, af Sätra Ulf. "Wear of piston rings in hydrostatic transmissions." Doctoral thesis, KTH, Machine Design (Div.), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-432.

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Анотація:

This study focuses on the wear of piston rings in a hydraulic radial piston motor. The piston ring has to satisfy increasing demands for reliability and longer service life. It has two contacting surfaces, the face and the flank, and operates under a boundary lubrication state.

This first part of the project aimed to detect and characterise piston ring wear. Measurement by weighing gives an overall value for wear defined as loss of mass. Two-dimensional form and surface roughness measurements show the distribution of wear on the piston ring face in contact with the cylinder bore and the piston ring flank in contact with the piston groove. Three-dimensional analyses, both quantitative and qualitative, allow the wear mechanisms to be identified.

The wear of piston rings from an actual hydraulic motor was characterised. As well, rig testing was performed in two different test rig set-ups, one simulating the sliding movement of the piston ring and the other the tilting movement at the end of the strokes. Wear during the running-in period was investigated, and the findings indicate that the period when this takes place is of short duration. In the long term, mild wear makes the surfaces smoother than they were when new, resulting in a very low wear coefficient. Significant levels of wear were measured on both contacting surfaces of the piston ring. In cases in which the flank exhibits more wear than the face, the wear on the flank can be reduced by proper design of the piston groove.

The second part of the project aimed to evaluate use of a textured surface for the cylinder bore counter surface and a coated surface for the piston ring. Three modelling experiments were performed to characterise the friction and wear properties under lean boundary lubrication conditions. Under such conditions, textured surfaces have the advantage of retaining more lubricant and supplying it over a longer time. Stable friction was also a distinctive feature of the textured surface. Use of a coating could also possibly reduce the amount of wear. Though a smooth surface, like a polished one, is hard to beat for a working texture, a coated surface is far ahead of a smooth uncoated one. Different manufactured and commonly used cylinder bore surfaces, including textured ones, were evaluated in the sliding movement test rig. That allowed favourable wear properties, such as lowest wear coefficient, to be determined with the use of a roller burnished surface.

A final part of the research involved simulating wear on the piston ring face throughout the entire service life of a hydraulic motor. This allowed us to determine the roles of surface roughness and coating in prolonging service life and achieving acceptable and secure piston ring operation. The model is simple and realistic, but still needs to be refined so as to correspond even better to reality.

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2

Rizzo, Giuseppe, Antonino Bonanno, Giorgio Paolo Massarotti, Luca Pastorello, Mariarosa Raimondo, Federico Veronesi, and Magda Blosi. "Energy efficiency improvement by the application of nanostructured coatings on axial piston pump slippers." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200187.

Повний текст джерела
Анотація:
Axial piston pumps and motors are widely used in heavy-duty applications and play a fundamental role in hydrostatic and power split drives. The mechanical power losses in hydraulic piston pumps come from the friction between parts in relative motion. The improvement, albeit marginal, in overall efficiency of these components may significantly impact the global efficiency of the machine. The friction between slipper and swash plate is a functional key in an axial piston pump, especially when the pump (at low rotational speed or at partial displacement) works in the critical areas where the efficiency is low. The application of special surface treatments have been exploited in pioneering works in the past, trying different surface finishing or adding ceramic or heterogeneous metallic layers. The potential of structured coatings at nanoscale, with superhydrophobic and oleophobic characteristics, has never been exploited. Due to the difficulty to reproduce the real working conditions of axial piston pump slippers, it has been made a hydraulic test bench properly designed in order to compare the performance of nano-coated slippers with respect to standard ones. The nano-coated and standard slippers have been subjected to the following working conditions: a test at variable pressure and constant rotational speed, a test at constant pressure and variable rotational speed. The comparison between standard and nanocoated slippers, for both working conditions, shows clearly that more than 20% of friction reduction can be achieved using the proposed nano-coating methodology.
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3

Tsala, Moto Serge Parfait. "Compatibilité tribologique d’un revêtement de surface avec une application donnée : Cas d’un revêtement de WS2 sur une tige de piston de frein aéronautique." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI035.

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Анотація:
Le chrome dur, utilisé comme revêtement de tige d’actionneurs hydrauliques linéaires, a été interdit pour risque sanitaire (directive européenne REACH). A cet effet, un revêtement de WS2 a été sélectionné par Safran Landing Systems pour substituer le chrome dur comme revêtement de tige de piston de frein hydraulique. La démarche de sélection utilisée, est limitée par son incapacité à expliquer les performances observées et démontre le besoin d’une démarche de sélection d’autant plus appropriée que la notion d’étanchéité des actionneurs hydrauliques linéaires est « floue ». Comme, la tribologie n’a pas vocation à caractériser les revêtements de surface, parce que son plus petit objet d’étude est un triplet tribologique, cette étude propose l’évaluation de la compatibilité tribologique du revêtement de WS2, avec la fonction d’étanchéité. La démarche utilisée montre que l’étanchéité est régie, par un critère en pression, et par une vérification des caractéristiques tribologiques du système tige/joints requises pour la réalisation de l’étanchéité ; ce qui nécessite un piston hydraulique instrumenté. L’absence de ce piston est compensée par une « caractérisation tribologique approchée » du contact tige/joints, qui associe les expertises tribologiques de pistons hydrauliques d’essais de qualification, appuyées par un modèle éléments finis (EF) du piston hydraulique d’une part, et les résultats d’un essai de frottement piste/joints, conçus à cet effet à l’aide d’un modèle EF d’autre part. Les résultats montrent que le système tige/joints présente de bonnes caractéristiques tribologiques pour le facteur de frottement et l’usure, alors que la localisation de l’accommodation de vitesses dans le cas du contact tige/joint d’étanchéité, accélère le débit source du revêtement et limite sa durée de vie. Enfin, cette thèse comble un vide méthodologique en proposant, une démarche de sélection d’un revêtement pour une application tribologique, et une démarche de triboconception d’un actionneur hydraulique linéaire dans le cas d’un fonctionnement quasi-statique
Hard chromium used as rod coating in linear hydraulic actuators has been forbidden by the European Directive REACH. In this situation, a WS2 coating has been selected by Safran Landing Systems to replace the hard chromium coating on rod pistons actuators of landing gear braking systems. The selection method was unable to explain the observed performance, and shows the lack of an appropriate methodology for the rod coating selection, mainly because the sealing concept is rather vague. Since tribology is not intended to characterize surface coatings, because its smallest object of study is a tribological triplet, this study proposes the evaluation of the tribological compatibility of the WS2 coating with the sealing function of the hydraulic piston. The adopted approach shows that the sealing performance is governed by a rod/seal contact pressure criterion and by the verification of the tribological characteristics of the rod/seal contact required to achieve a sealing performance. This tribological characterization requires an instrumented hydraulic piston. The absence of this piston is compensated by an "approximate tribological characterization" of the rod/seal contact, which combines the tribological expert analysis of hydraulic pistons of qualification tests, supported by a finite elements model (FE) of the hydraulic piston, and the results of a plate rod/seal friction test, designed for this purpose using another FE model. The results show that the rod/seal contact exhibits good tribological characteristics for the friction factor and wear, whereas the location of the velocity accommodation in the case of the rod/anti-extrusion seal contact accelerates the 3rd body generation of the coating and limits its life expectancy. Finally, this thesis fills a methodological lack by proposing a method of selecting a coating for a tribological application and a triboconception method of a linear hydraulic actuator in the case of quasi-static operating conditions
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4

Rühlicke, Ingo. "Jacking and Equalizing Cylinders for NASA- Crawler Transporter." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200569.

Повний текст джерела
Анотація:
For the transport of their spacecraft from the vehicle assembly building to the launch pads at Kennedy Space Centre, Florida, the National Aeronautics and Space Administration (NASA) is using two special crawler transporters since 1965. First developed for the Saturn V rocket the crawler transporters have been sufficient for all following generations of space ships so far. But for the new generation of Orionspacecraft which is under development now, a load capacity increase for the crawler transporter of plus 50% was necessary. For this task Hunger Hydraulik did develop new jacking, equalizing and levelling (JEL) cylinders with sufficient load capacity but also with some new features to improve the availability, reliability and safety of this system. After design approval and manufacture of the cylinders they have been tested in a special developed one-to-one scale dynamic test rig and after passing this the cylinders had to prove their performance in the crawler transporter itself. This article describes the general application and introduces the technical requirements of this project as well as the realized solution.
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5

Geffroy, Stefan, Niklas Bauer, Tobias Mielke, Stephan Wegner, Stefan Gels, Hubertus Murrenhoff, and Katharina Schmitz. "Optimization of the tribological contact of valve plate and cylinder block within axial piston machines." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71109.

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Анотація:
In this paper, a simulation study is carried out for the development of concepts to optimize the tribological contact of valve plate and cylinder block in an axial piston machine in swash plate design. The valve plate/cylinder block contact is one of the three essential tribological contacts in axial piston machines. In a research project at the Institute for Fluid Power Drives and Systems (ifas), this contact is investigated by a specifically designed simulation tool. In addition, a test rig exists for the experimental investigation. With the results of simulation and experiment, it was shown before that the cylinder block is tilting to the high pressure side. Due to this movement, the gap height is not constant. In the area of minimum gap height, not only the fluid friction, but also the danger of solid body friction increases. Because of the higher friction losses in the area of minimum gap height, the temperature increase reduces the lifetime of the leaded coatings. In this paper, the results of the measurements as well as the simulation model are briefly summarized. It is followed by a simulation study of different possibilities to raise the gap height. Based on this pre-study, a first concept for the optimization of the tribological contact valve plate/cylinder block is presented and its applicability is discussed.
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6

Lopes, Elizabeth Montefusco. "A influência da umidade do substrato no desempenho de revestimentos de piso de edifícios." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-03032004-105816/.

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Анотація:
Sobre opiso desenvolvem-se todas as atividades a que se destina a edificação. Falhas Em sua execução, tais como, empenamentos, placas soltas, bolhas e manchas têm como conseqüências, desde o desconforto pessoal de andar em uma superfícieirregular, ao risco de acidentes de trabalho, contaminação de produtos por poeira, de salinhamento de equipamentos ou até mesmo a interferência no processo de produção, podendo provocar a paralisação parcial ou total da atividade produtiva da empresa.Tais problemas, muitas vezes são decorrentes do excesso de umidade do substrato de concreto, quando da aplicação do revestimento, por não ter tido o tempo de secagem adequado, de maneira a atingir o nível de umidade ideal. O excesso de água residual decorrente da umidade do substrato é uma das principais causas geradoras de patologias nos pisos de concreto quando utilizados revestimentos suscetíveis à presença de água. O comportamento da umidade do concreto é resultado de uma complexa ação entre a quantidade de água física e quimicamente ligada, durante a hidratação do cimento e a capacidade de transporte de água do sistema de poros do concreto. Neste contexto, o presente trabalho procura contribuir na sistematização do conhecimento sobre o assunto, descrevendo, inicialmente, o comportamento de bases de concreto frente à ação da água e os fatores que a influenciam: grau de hidratação, condições de equilíbrio e fluxo de umidade. É mostrado como ocorre a secagem do concreto e a influencia do tempo de cura, relação água/cimento do concreto e condições ambientes sobre o tempo necessário para que a umidade do concreto atinja o nível ideal para o início do revestimento do piso. São descritos os testes utilizados para a medição do nível de umidade do concreto, enfatizando os de caráter quantitativo, baseados na medição do teor de umidade, taxa de emissão de vapor de água e umidade relativa interna do concreto. Valores dos níveis ideais de umidade, em conformidade com o tipo de teste aplicado e materiais empregados, estabelecidos por entidades representativas de fabricantes de revestimentos para pisos de concreto, são apresentados como referências. O texto é finalizado com a apresentação das recomendações que visam facilitar a secagem do concreto e aspectos a serem observados quando da realização da medição do nível de umidade.
On the floor are developed all the activities the building is destined to. Faults in its execution, such as warping, loose plates, bubbles and stains, bring about from the personal discomfort of walking on an irregular surface, to the risk of workplace accidents, contamination of product due to dust, misalignment of equipment or even the interference in the production process, which may cause a partial or total stalling of the company productive activity. Such problems often derive from excess moisture in the concrete substrate, when the lining is applied, for not having been dried long enough, so as to attain the ideal moisture level. The excess residual water deriving from substrate moisture is one of the main causes generating pathologies on concrete floors when linings susceptible to the presence of water are used. The moisture behavior of concrete derives from a complex action between the amount of physical and chemically related water, during the hydration of the cement and the water transport capacity of the concrete pore system. In thisn context, the present work aims to contribute in systematizing the knowledge on the matter, initially describing the behavior of the concrete bases concerning the action of water and the factors influencing this: degree of hydration, balance conditions and humidity. The work shows how the drying of concrete occurs and the influence of the curing time flux, concrete water/cement ratio and ambient conditions on the time required for the concrete moisture to attain the ideal level to start the floor lining. The tests used to measure the concrete moisture level are described, emphasizing those of quantitative character, based on the measurement of the moisture content, water vapor emission rate and the concrete relative internal humidity. Values of the ideal levels of moisture, in accordance with the type of test applied and materials employed, established by representative manufacturer entities for concrete floors linings, are presented as references. The text concludes with the presentation of recommendations that aim to make the drying of concrete easier and aspects to be observed when the measurement of the moisture level is performed.
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REJOWSKI, EDNEY D. "Caracterização e desempenho de um filme de carbono amorfo hidrogenado tipo diamante (a-C-H) dopado com silício, aplicado em camisa de cilindro de motor à combustão interna." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10143.

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Made available in DSpace on 2014-10-09T12:35:14Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T13:58:01Z (GMT). No. of bitstreams: 0
Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Wassborg, Pär. "Tribological evaluation of the contact between upper compression ring and cylinder liner with different surface coatings." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-45454.

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The constant pursuit in the automotive industry to increase the engines performance, new solutions are always developed and tested to reduce the friction and increase the efficiency in the engine. One component that contributes to friction losses is the piston ring pack where the top compression stands for up to 40 %. This master thesis collaborated with Scania’s material science department Basic engine and covers the friction and wear of four different materials on the cylinder liner surface against the top compression ring.The four tested materials were grey cast iron with different honing quality and three atmospheric plasma sprayed coatings with titanium oxide, chromium oxide and Metco’s mixture F2071 which is a stainless steel mixed with a ceramic. A martensitic steel piston ring with a chromium coated sliding surface was used for all the testing in the Cameron-Plint TE77 test-rig. This is a pin-on-disc test method and the parameters used for testing is set to replicate the environment the ring is exposed to at the top dead centre.The test-rig has been in Scania’s possession for a long time and has not always given a satisfying result. An uneven contact between the ring and liner has been a problem resulting in only worn edges of the liner specimen. The piston ring holder was therefore redesigned to be able to adjust the radius of the ring. This allowed a good conformability between the ring and liner to be obtained.The tested materials were evaluated according to friction and wear. Friction was measured with the test-rig and the wear was calculated with surface profiles that were measured before and after testing. Worn surfaces were studied in a SEM to verify which wear mechanism that was active. The changes of the surfaces was studied with the use of following surface parameters Ra, Rk, Rpk, Rvk and if there was a connection between these parameters and friction and wear coefficient.Independent of honing quality showed the grey cast iron lowest friction coefficient just under 0.13, the F2071 liner showed a friction coefficient just above 0.13. Both oxide layers showed similar friction where the chromium oxide had a friction just below 0.15 and the titanium oxide lay just above 0.15. Lowest wear coefficient had the chromium oxide followed by F2071, titanium oxide and the bad honed grey cast iron. These three liners showed almost the exact same wear coefficient. Worst wear coefficient had the grey cast iron with a good honing quality. A mild abrasive wear mechanism was active during the wear test and vague wear marks was found on the surface. There is no connection between wear coefficient and friction and the change in surface roughness during the test does not affect the friction.
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Cruz, Vasco Joel Simões. "Cálculo das propriedades físicas dos anéis envolvidas no processo de fabrico." Master's thesis, 2015. http://hdl.handle.net/10316/29047.

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Tese de Mestrado em Engenharia Mecânica na especialidade de Produção e Projeto, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.
As propriedades dos anéis de pistão influenciam os parâmetros utilizados no estudo do comportamento em serviço e funcionamento no motor. Estas propriedades físicas dependem das características geométricas da secção transversal do anel bem como das propriedades mecânicas dos materiais utilizados no seu fabrico. Este trabalho tem como objectivo desenvolver e implementar uma metodologia de cálculo do momento de inércia e da linha neutra da secção transversal dos anéis de pistão, que facilite e melhore a precisão do processo de cálculo das suas propriedades. A metodologia desenvolvida baseia-se na discretização da geometria da secção transversal num conjunto de pontos, cujas coordenadas são calculadas com o auxílio de cotas definidas pelas normas internacionais de anéis de pistão. O programa desenvolvido no Microsoft Office Excel 2010 abrange todos os anéis de 1ª e 2ª ranhura e permite uma análise pormenorizada da secção, que garante valores de propriedades físicas e parâmetros de projecto dos anéis mais fiáveis. A metodologia proposta contempla a análise do impacto do revestimento no módulo de elasticidade equivalente do anel, em particular nas propriedades físicas dos anéis. De facto, apesar dos revestimentos apresentarem uma espessura reduzida, o módulo de elasticidade equivalente do anel revestido altera-se, em função da percentagem de área do revestimento em relação à área total da secção e do módulo de elasticidade do material de base e do revestimento. No entanto, a influência da variação do módulo de elasticidade do anel no valor do coeficiente de conformabilidade não é significativa, na maior parte dos casos reais. O trabalho realizado focou-se nos anéis de pistão de compressão e foi realizado nas instalações da MAHLE Componentes de Motores S.A., em Portugal.
The properties of piston rings influence the parameters used in the study of the in service behaviour and operating conditions of the engine. These physical properties depend on the geometric characteristics of the ring cross section as well as on the mechanical properties of the materials used in its manufacture. This work aims to develop and implement a methodology for calculating the moment of inertia and neutral line of the cross section of the piston rings, which facilitates and improves the accuracy of these properties calculation process. The methodology is based on the discretization of the geometry of the cross section using a set of points, whose coordinates are calculated with the aid of the dimensions defined by the international standards piston rings. The program developed in Microsoft Office Excel 2010 covers all the rings of 1st and 2nd groove and allows a detailed analysis of the section, which ensures more reliable values for the physical properties and project parameters. The proposed method includes the assessment of the impact of the coating on the ring’s equivalent elastic modulus, in particular on the physical properties of the rings. In fact, despite the reduced thickness of the coatings, the equivalent elastic modulus of the coated ring is altered, depending on the percentage ratio between the coating area and the total cross section area and the elastic modulus of the bulk material and the coating. However, the influence of variation of the ring’s elastic modulus in the value of the conformability coefficient is not significant, for most real cases. The work focused on the compression piston rings and was performed in MAHLE Componentes de Motores SA plant, in Portugal.
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Книги з теми "Piston coating"

1

Weber, R. Ceramic coated piston rods for civil works. [Champaign, IL]: US Army Corps of Engineers, Construction Engineering Research Laboratories, 1999.

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2

Center, NASA Glenn Research, and U.S. Army Research Laboratory., eds. The influence of honing on the wear of ceramic coated piston rings and cylinder liners. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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3

Center, NASA Glenn Research, and U.S. Army Research Laboratory., eds. The influence of honing on the wear of ceramic coated piston rings and cylinder liners. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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4

United States. National Aeronautics and Space Administration., ed. Test method to evaluate cylinder liner-piston ring coatings for advanced heat engines. [Washington, D.C: National Aeronautics and Space Administration, 1997.

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5

United States. National Aeronautics and Space Administration., ed. Test method to evaluate cylinder liner-piston ring coatings for advanced heat engines. [Washington, D.C: National Aeronautics and Space Administration, 1997.

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Частини книг з теми "Piston coating"

1

Malathi, M., J. Herbert Mabel, and R. Rajendran. "NiP Composite Coating of Piston Ring by Plate and Bumper Method." In Lecture Notes in Mechanical Engineering, 397–407. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6619-6_43.

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2

Bonanno, Antonino, Mariarosa Raimondo, and Stefano Zapperi. "Surface Nano-structured Coating for Improved Performance of Axial Piston Pumps." In Factories of the Future, 295–314. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-94358-9_14.

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3

Guermat, Abdelkader, Guy Monteil, and Mostefa Bouchetara. "Influence of Coating on Friction and Wear of Combustion Engine Piston Rings." In Damage and Fracture Mechanics, 387–94. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2669-9_41.

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4

Sharma, Vipin Kumar, Vinayak Goel, and Mudit Shukla. "Effect of Hard Chromium Coating on the Frictional Behavior of Piston Ring Material." In Lecture Notes in Mechanical Engineering, 153–63. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4748-5_16.

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Rajesh, R., C. Vijaya Bhaskar Reddy, and B. Durga Prasad. "Experimental Investigation on LHR Engine Modified Piston with YSZ Coating by Using Biodiesel." In Advances in Mechanical Engineering, 25–35. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0942-8_3.

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Niezgoda, Tadeusz, Zdzisław Kurowski, and Jerzy Małachowski. "Numerical Modelling and Simulation of an Internal Combustion Engine Piston with a Surface Coating." In Computational Methods in Engineering & Science, 205. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-48260-4_51.

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7

Maurizi, Marco, and Daniel Hrdina. "New MAHLE steel piston and pin coating system for reduced TCO of CV engines." In Proceedings, 161–80. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-19012-5_10.

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Bhuyan, Saswat Kumar, and Debajit Mohapatra. "An Investigation on Surface Ceramic Coating of Compression Ignition Engine Piston Using Finite Element Analysis." In Lecture Notes in Mechanical Engineering, 459–68. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4795-3_42.

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Udagawa, S., W. Garen, T. Inage, M. Ota, and K. Maeno. "Trial Implementation of TiN Surface Coating for a Main Piston Towards Reducing the Opening Time for a Diaphragmless Driver Section." In 31st International Symposium on Shock Waves 2, 173–79. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-91017-8_21.

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Li, Wenping, and Yun Lu. "The Study of Friction and Wear Capability of Piston Ring Coatings." In Lecture Notes in Electrical Engineering, 241–47. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3527-2_22.

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Тези доповідей конференцій з теми "Piston coating"

1

Memme, Silvio, and James S. Wallace. "The Influence of Thermal Barrier Coating Surface Roughness on Spark-Ignition Engine Performance and Emissions." In ASME 2012 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icef2012-92078.

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The separate effects on heat transfer of 1) piston crown surface finish and 2) the use of a metal based thermal barrier coating (MTBC) on the piston crown of a spark ignition (SI) engine were quantified through experimental analysis in a single cylinder CFR engine. Measured engine parameters such as power, fuel consumption, emissions and cylinder pressure were used to identify the effects of the coating and its surface finish. Two piston coatings were tested: a baseline copper coating and a metal-based thermal barrier coating. Each coating was tested at multiple surface finishes. Tests showed that reducing surface roughness of both coatings increased in-cylinder temperature and pressure as a result of reduced heat transfer through the piston crown. For both coatings, this resulted in small improvements (∼3%) in power and fuel consumption, while also having a measurable effect on emissions. Oxides of nitrogen emissions increased while total hydrocarbon emissions generally decreased as a result of polishing. The polished coatings were also seen to increase in-cylinder peak pressures and burn rates. Improvements attributed to the TBC were found to be small, but statistically significant. At an equivalent surface finish, the MTBC-coated piston produced slightly higher power output and peak pressures. Hydrocarbon emissions were also seen to be significantly higher for the MTBC-coated piston due to its porosity. The effectiveness of the coating was found to be highly dependent on surface finish.
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Kamo, Lloyd, Philipe Saad, Walter Bryzik, and Milad Mekari. "Ceramic Coated Piston Rings for Internal Combustion Engines." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64343.

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This paper reports the development and formulation of a new cost effective means of applying ceramic tribology coatings to sealing rings. This coating, though developed with the support of the U.S. Army Tank Automotive and Armaments Command for use on Low Heat Rejection (LHR) high output diesel engines, can be used on any internal engine compression seal ring. It is not limited for use in LHR diesel engines. Applying ceramic coating, especially on the compression piston ring, reduces the friction losses and wear of sliding contact surfaces. This will result in increased engine efficiency and durability. The work presented examines both laboratory and small bore engine testing of this technology. Laboratory tribometer tests compare the ceramic coating to existing and experimental piston ring tribosurfaces. Friction and wear performance demonstrated in the laboratory is verified for use in LHR diesel engine application. Low raw material cost coupled with ease of application and high deposit efficiency of the ceramic make this coating a viable candidate for commercialization.
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Herbst-Dederichs, C. "Thermal Spray Solutions For Diesel Engine Piston Rings." In ITSC2003, edited by Basil R. Marple and Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p0129.

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Abstract Diesel engine development is continuously progressing: light vehicle diesel (LVD) engines are gaining in popularity in Europe and therefore we see a steady improvement in power performance and fuel consumption going along with increased loading of the power-cylinder components. Moreover, heavy-duty (HD) engines for trucks are facing stricter environmental legislation leading amongst other technologies to the introduction of exhaust gas recirculation (EGR). Whatever reduced emission technology will be applied, they all will significantly influence the engine tribology. This paper is dedicated to describing modern piston ring coating technologies to face the future diesel engine demands. The paper mainly focuses onto modern piston ring coating technology such as hard particle reinforced chrome plating, HVOF spraying and PVD. In particular, it will be discussed how thermal spray coatings need to be designed to find their position among established or future coating technologies of the competition.
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Delaet, M., and C. Coddet. "Thermal Spray Coating Developments for Piston Rings to be Used in Tomorrow’s Duty Engines." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0001.

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Abstract Plasma arc sprayed coatings are largely developed in Perfect Circle Europe because of the wide range of coating materials which ensure numerous tribological properties. Spraying parameters are of great importance in improving the coating structure and therefore the coating wear, adhesive, cohesive and corrosive resistances. The utilized plasma gas is first studied; designed experiments are then achieved to optimize the all spraying parameters. More than the spraying parameters, the powder formulation has a major influence on the coating tribological properties. Several powders are studied with the aim to reduce the ring-liner system wear. Tests on idealized samples coupled with engine tests help us to characterize the tribological behaviour of some molybdenum based coatings.
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Morgenstern, Roman, Wolfgang Kießling, and Simon Reichstein. "Reduced Friction Losses and Wear by DLC Coating of Piston Pins." In ASME 2008 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ices2008-1650.

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A Diamond Like Carbon (DLC) coating is well known to offer superior wear and friction behaviour. This combination of properties makes DLC suitable for many different areas of tribology. This paper concerns itself with usage in the power cylinder environment of automotive diesel engines. To estimate the potential of DLC coatings applied to piston pins in internal combustion engines, linearly reciprocating sliding wear examinations have been performed on uncoated and DLC coated component segments versus different counterpart materials as present in the power cylinder environment, including: piston (aluminium alloy), bushing (brass), piston pin (steel) and connecting rod (steel). Evaluation criteria for the tests include friction and wear performance in dry and lubricated conditions. Test results show how the DLC coatings offer impressive wear reductions for each of the different counterpart materials used. Furthermore, special emphasis is given to the analysis of the friction behaviour. As expected, the coefficient of friction (COF) decreased for aluminium and steel counterparts when the piston pin segments were DLC coated. However, for the combination of DLC with brass the COF increased in the dry condition. This surprising outcome is explained with SEM and EDX investigations of the wear traces. The tests at elevated temperature with lubrication show an inverse relationship with respect to friction criteria when compared with the dry room temperature tests for the DLC with brass combination. Examined engine tests confirm the results of the non-engine wear test rig, showing that DLC coatings applied on piston pins also exhibit properties and good potential to decrease frictional losses and fuel consumption in modern engines.
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Houdková, Š., M. Kašparová, and F. Zahálka. "Sliding Wear Behavior of HVOF Sprayed Coatings, Suitable for Piston Rings Application." In ITSC2011, edited by B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0914.

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Abstract The HVOF sprayed wear resistant hardmetal coatings with favourable sliding properties are suitable for increasing the lifetime of sliding applications, such as pistons of combustion engines, pumps and other hydraulic devices. In practice, the coatings face the problem of their interaction with other media, in the case of sliding wear usually lubricants. In the paper, the friction properties of five different HVOF sprayed coatings are evaluated by pin-on-disk test according to ASTM G-99 under dry and lubricated conditions and lubricated block-of-ring test according to ASTM G77. Several types of lubricants designed for combustion engines were used to compare their influence on coatings sliding wear behavior. Based on the results, the suitability of coatings for the application on the engines parts is discussed and the effect of counterpart material and different types of lubricants on the coefficient of friction and coatings wear rate is analyzed. It was confirmed, that the CrC-based coating are more suitable for the application under the condition corresponding to combustion engines, e.g. elevated temperature and steel counterpart, than the WC-based coatings. From the group of CrC-based coatings, the superior behavior was observed at the CrC-CoNiCrAlY coating, the matrix material of which offers further enhancement of the sliding wear behavior.
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7

Peters, J. A., W. Straub, M. Dorfman, and A. R. Nicoll. "New Thermal Spray Coating Solutions for Sliding Wear Under Starved Lubrication." In ITSC 1999, edited by E. Lugscheider and P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0153.

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Abstract This paper describes the development of novel engineered surfaces based on thermal spray coatings for sliding wear resistance under conditions of high loading and starved lubrication. As specific examples, piston ring elements for internal combustion engines and radial bearings for medium-lubricated pumps are discussed. The properties of two coatings, SUME SOL 220 and SUME SOL 320, are compared with existing materials and coatings. It was found that SUME SOL 220 exhibited excellent sliding wear resistance under boundary (oil) lubrication. As a consequence, they are considered as attractive candidates for piston ring applications in heavy duty engines. For more corrosive applications, such as encountered in sea water environments, the SUME SOL 320 coating exhibited superior combinations of sliding wear and corrosion resistance. Paper includes a German-language abstract.
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Schuetz, Michael, and Gary McIntyre. "Solid Lubricant Coatings for Automotive Engine Pistons." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63086.

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The demand for more powerful internal combustion engines with lower weight, reduced fuel consumption, and favorable environmental properties has led to engine piston designs having lower weight, reduced thermal expansion, and good thermal conductivity. These improvements were needed without sacrificing high thermal strength, reduced operating friction, and increased wear resistance. The need for reduced frictional properties resulted in pistons with shorter skirt lengths, which led to a reduction in effective hydrodynamic surface area perpendicular to the pin bore. At the same time, complex cold start cycles and fuel injection systems were developed that brought enriched fuel mixtures into the engine, causing a dramatic reduction in the viscosity of the lubricant film and thereby its capabilities to protect the sliding surfaces from wear. These higher mechanical stresses on the piston combined with the reduced lubricating ability of the oil film led to increased friction and wear rates, which often resulted in decreased customer satisfaction due to high noise (i.e., piston “slap”) or complete engine failure. To counteract these tribological problems, a variety of piston coatings were developed, but the composition of these coatings often brought a new set of environmental concerns, e.g., the use of heavy metals. The current solution for this problem is to utilize Anti-friction Coatings (AFC’s) on specific areas of the piston. These coatings are based on solid lubricant technology combined with that of high performance resins. The coatings are resistant to fuels and engine oils over the normal operating temperature range of the engine. They also provide a long-term lubricant coating with exceptional capability to handle intermittent excursions outside an engine’s normal duty cycle.
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Kraak, T., G. Coolegem, and W. Herlaar. "Ceramics as Wear and Corrosion Protection on Hydraulic Piston Rods." In ITSC2008, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p0990.

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Abstract The application of thermal sprayed coatings has a broad industrial scope, not only applied where it concerns repairing but also as a preventive means. This article focuses on the applications of ceramics as wear and corrosion protection on hydraulic piston rods. It begins with a concise description of the different forms of wear and their mechanisms with some typical examples of worn surfaces. This is followed by an overview of the available coating techniques for enhancing metal surfaces. Next, the article discusses the principle and applications of thermal sprayed coatings. Then, it presents the scope and protection measures of thermal sprayed coatings to failure mechanism. Further, the article discusses the properties, quality control, and testing criteria of the coatings. It describes the chemical composition and chemical analysis of quality control spray powder. Finally, the article ends with a discussion on the examples of thermal sprayed coatings in OEM applications.
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Keiji, Sonoya, Nakamura Masanobu, and Sekine Masashi. "Assessment of the Spray Coated Properties for the Thermal Barrier Applied to the Piston Head of an Internal-Combustion Engine." In ITSC2015, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.itsc2015p0917.

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Анотація:
Abstract In order to select the effective sprayed coating for giving the thermal barrier to the Al alloy components of internal-combustion engine. The properties of three thermal sprayed coatings (Coating : Top coat; Al2O3, Bond coat; Ni-Cr, Coating②: Top coat; YSZ, Bond coat; CoNiCrAlY, Coating ③ : SUS316) were compared. The results are as follows. (1)After thermal cycle test, there was not any crack and delamination in the coating ③ , and a partial cracks and delamination were observed at the top coating in coating① and ②. (2)The coating①, ②and③ have sufficient adhesion strength. The adhesion strength of coating② was specially high. (3)The thermal barrier property of the coating② was better than that of coating① and coating③. (4) In the result of comprehensive evaluation, the coating② had good thermal barrier property and the coating③ was a reasonable material because of low cost as the thermal sprayed coating applied to the Al alloy components of internal-combustion engine.
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Jarosz, Paul. Plasma Electrolytic Oxidation (PEO) Coatings as Superior Thermal Barriers for Engine Pistons - F. Office of Scientific and Technical Information (OSTI), March 2020. http://dx.doi.org/10.2172/1604429.

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