Littérature scientifique sur le sujet « Piston skirt »
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Articles de revues sur le sujet "Piston skirt"
Dursunkaya, Zafer, Rifat Keribar et Venkatesh Ganapathy. « A Model of Piston Secondary Motion and Elastohydrodynamic Skirt Lubrication ». Journal of Tribology 116, no 4 (1 octobre 1994) : 777–85. http://dx.doi.org/10.1115/1.2927332.
Texte intégralTeng, Dezhi, Jingsi Wang, Chengdi Li et Xiaoxia Sa. « Investigation of Friction and Wear Behavior of Cast Aluminum Alloy Piston Skirt with Graphite Coating Using a Designed Piston Skirt Test Apparatus ». Materials 15, no 11 (5 juin 2022) : 4010. http://dx.doi.org/10.3390/ma15114010.
Texte intégralSmirnov, Sergei V., Vladimir V. Kopylov, Alexander R. Makarov, Alexander A. Vorobyev et Kirill V. Shkarin. « An experimental study of the stress-strain state of the engine piston skirt on the engineless stand ». RUDN Journal of Engineering Researches 20, no 4 (15 décembre 2019) : 285–92. http://dx.doi.org/10.22363/2312-8143-2019-20-4-285-292.
Texte intégralSun, Jun, Feifei Hao, Guangsheng Liu, Hu Wang, Qin Teng, Enming Miao, Xiaoyong Zhao, Yanping Ren et Guixiang Zhu. « Research on the lubrication performance of engine piston skirt–cylinder liner frictional pair considering lubricating oil transport ». International Journal of Engine Research 21, no 4 (4 juin 2018) : 713–22. http://dx.doi.org/10.1177/1468087418778658.
Texte intégralGao, Qi, Cheng Ying Li, Hong Zeng et Lei Bo Zhao. « Middle-Convex Curve and Ellipse Surface of Piston Skirt Design Based on MATLAB and Pro/E ». Advanced Materials Research 299-300 (juillet 2011) : 891–94. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.891.
Texte intégralBlair, W. L., D. P. Hoult et V. W. Wong. « The Role of Piston Distortion on Lubrication in a Reciprocating Engine ». Journal of Engineering for Gas Turbines and Power 112, no 3 (1 juillet 1990) : 287–300. http://dx.doi.org/10.1115/1.2906494.
Texte intégralMcFadden, PD, et SR Turnbull. « A study of the secondary piston motion arising from changes in the piston skirt profile using a simplified piston skirt model ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 227, no 1 (19 avril 2012) : 38–47. http://dx.doi.org/10.1177/0954406212444509.
Texte intégralLiu, K., Y. B. Xie et C. L. Gui. « A comprehensive study of the friction and dynamic motion of the piston assembly ». Proceedings of the Institution of Mechanical Engineers, Part J : Journal of Engineering Tribology 212, no 3 (1 mars 1998) : 221–26. http://dx.doi.org/10.1243/1350650981542038.
Texte intégralMansouri, S. H., et V. W. Wong. « Effects of Piston Design Parameters on Piston Secondary Motion and Skirt - Liner Friction ». Proceedings of the Institution of Mechanical Engineers, Part J : Journal of Engineering Tribology 219, no 6 (1 juin 2005) : 435–49. http://dx.doi.org/10.1243/135065005x34026.
Texte intégralJin, Zhou, Zhi Zhuang Yu et Lin Sheng Yang. « Prediction of Nonlinear Contact Force of Piston Skirt and Cylinder Liner under the Function of Clap Force ». Applied Mechanics and Materials 226-228 (novembre 2012) : 831–34. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.831.
Texte intégralThèses sur le sujet "Piston skirt"
Bai, Dongfang Ph D. Massachusetts Institute of Technology. « Modeling piston skirt lubrication in internal combustion engines ». Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74901.
Texte intégralCataloged from PDF version of thesis.
Includes bibliographical references (p. 143-147).
Ever-increasing demand for reduction of the undesirable emissions from the internal combustion engines propels broader effort in auto industry to design more fuel efficient engines. One of the major focuses is the reduction of engine mechanical losses, to which the friction of the piston skirt is one important contributor. Yet there lacks a sufficient understanding of the skirt lubrication behavior to effectively optimize the piston skirt system in practice. The ultimate goal of this work is to develop a comprehensive model to advance the predictability of the skirt friction while integrating all the dynamic behavior of the piston secondary motion and the structural deformation of the piston skirt and cylinder liner. Major contributions of this work are analysis of and development of a model for the oil transport and exchange of the piston skirt region and its surroundings. The new oil transport model is composed with two elements. First, the oil scraped into the chamfer region by the oil control ring during a down-stroke is tracked and its accumulation and release to the skirt region are modeled. Second, oil separation and re-attachment are allowed in the skirt region, breaking conventional full-attachment assumption in lubrication studies. The new oil transport model together with hydrodynamic and boundary lubrication model were coupled with piston secondary motion and structural deformation of the piston skirt and cylinder liner. For numerical efficiency and physics clarity, we used different discretization for the lubrication from the structural deformation. The final model is robust and efficient. The discussion of the model results is focused mainly on the oil transport. There exist a general pattern in available oil for skirt lubrication, namely, skirt tends to be starved when it travels at the upper portion of a stroke. Comparison with visualization experiment for oil accumulation patterns show consistency between model prediction and observation. This work represents a major step forward to realistically predicting skirt friction and the influence of all the relevant design and operational parameters. However, oil supply to the region below the piston skirt can largely influence the outcome of the friction prediction and its mechanism is system dependent. Additionally, simple treatment of the oil transport in the current model is merely a first step to modeling the complex fluid problems involved. Improvements of this model based on application and further analysis will make it a more powerful engineering tool to optimize the skirt system to minimize its undesirable outputs.
by Dongfang Bai.
Ph.D.
Totaro, Pasquale (Pasquale Pio). « Modeling piston secondary motion and skirt lubrication with applications ». Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92125.
Texte intégralCataloged from PDF version of thesis.
Includes bibliographical references (pages 97-100).
The interest in reducing emission and improving engine efficiency has become a major push in industry, due to upcoming stricter regulations. A great deal of attention has been given to the frictional losses due to piston and liner interaction, as they represent a significant portion of the total mechanical losses. This thesis work focuses on further development and application of an existing model for the piston's secondary motion and skirt lubrication. Model development has been focused on introducing liner dynamic deformation, temperature and shear-thinning effect on viscosity, and arbitrary skirt's shape definition. The theory behind the inclusion of these components is discussed and the modifications to the existing model are explained. In regards to the model's applications, an important topic is the model validation, for which friction results from simulations are compared with experimental results obtained on a floating liner engine. The analysis covers the running condition of 1000 rpm, at partial and full load. This study is, however, not concluded and more cases need to be studied in order to complete the validation of the model. The second application focuses on the effects of geometrical patterns on the skirt on friction and secondary motion of the piston. First, some regular patterns were studied and found to have negative effects on friction due to their inability to build sufficient hydrodynamic pressure, compared to the baseline design. Then, a different sets of patterns were proposed to more effectively utilize available oil and to maximize the hydrodynamic pressure generation in the skirt region. The results show that new strategy can significantly reduce friction of the skirt without introducing negative impact on the secondary motion. This thesis work aims to make the model a more complete and powerful tool to understand piston's secondary motion and the applications are meant to show the capabilities of the model, as an instrument to approach piston's design and inspire new ways and ideas to reduce frictional losses.
by Pasquale Totaro.
S.M.
Littlefair, Bryn. « A tribo-dynamic solution for the flexible piston skirt and liner conjunction ». Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/14900.
Texte intégralMeng, Zhen Ph D. Massachusetts Institute of Technology. « Numerical investigation of the piston skirt lubrication in heavy duty diesel engines ». Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111710.
Texte intégralCataloged from PDF version of thesis.
Includes bibliographical references (pages 101-102).
Friction reduction in the power cylinder system of internal combustion engines has been undergoing broad and intense study in an industry-wide effort to reduce CO2 from the engines. As a major source of frictional loss in the system, the piston skirt-liner interface, specifically in heavy duty diesel engines, is investigated in this thesis work using a model developed in-house. Prior to the calculation of various cases for parametric study, improvements were made to the existing model in order to incorporate the characteristics of heavy duty diesel engines, and to enhance the robustness and accuracy of the model in general. These improvements include enabling arbitrary distribution oil supply to the system, more efficient way to incorporate the shear-thinning effect of multigrade lubricants, and new scheme at the start of the simulation to resolve the situation with large overlap between piston skirt and liner. The first part of the analysis from application focuses on the geometric parameters of the system such as installation clearance, deformation of the components, and surface roughness of piston skirt. The effects of each individual parameter are discussed and summarized. The second part of the analysis is focused on the sensitivities of the system to the amount and distribution of oil supply. It was found that more lubricant can help reduce friction on thrust side during expansion stroke and on anti-thrust side during compression stroke. However, due to the rapid loss of oil at the piston-liner interface during early compression stroke, there is a limit to the advantage of more oil addition. It has also been suggested that with a certain amount of oil supply, it is more beneficial to add the lubricant higher on the liner. This thesis work is the first effort with the model to systematically study the piston skirt lubrication in heavy duty diesel engines. It is expected to be facilitated by the measurement and observation from experiments in the future.
by Zhen Meng.
S.M.
McClure, Fiona. « Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines ». Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42289.
Texte intégralIncludes bibliographical references (p. 239-241).
Internal combustion engines dominate transportation of people and goods, contributing significantly to air pollution, and requiring large amounts of fossil fuels. With increasing public concern about the environment and the reliability of oil supplies, automotive companies are pushed to improve engine design in order to reduce engine emissions and fuel consumption. This project aims to develop a numerical model of piston dynamics and lubrication in internal combustion engines, enabling prediction of friction generation at the piston -cylinder bore interface, and oil transport in the power cylinder system. It is currently estimated that the piston - cylinder bore friction accounts for up to 25% of the power loss in a typical engine, while oil transported to the combustion chamber by the piston and ring-pack contributes significantly to engine emissions. A dry piston model was first developed to allow fast calculation of approximate piston dynamics. An elastohydrodynamic lubrication model was then developed to allow direct numerical simulation of the effect of piston tooling marks, and comparison with results obtained using an Average Reynolds equation with flow factors. The lubrication model was incorporated into the piston dynamics model, enabling more accurate evaluation of friction and oil transport. Comparison between the dry and lubricated model results demonstrate the effect of oil film thickness on piston lateral motion, tilt, friction generation and oil transport.
by Fiona McClure.
Ph.D.
Balakrishnan, Sashi. « Transient elastohydrodynamic analysis of piston skirt lubricated contact under combined axial, lateral and tilting motion ». Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/19897.
Texte intégralHowell-Smith, S. J. « Tribological optimisation of the internal combustion engine piston to bore conjunction through surface modification ». Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8449.
Texte intégralHong-Chun, Lin, et 林鴻鈞. « Measurement of circumferential discrepancy of piston skirt profile for a two-stroke engine ». Thesis, 2003. http://ndltd.ncl.edu.tw/handle/25810876866221182643.
Texte intégral國立臺灣科技大學
機械工程系
91
The regular elliptical method and the average angle method are used to evaluate the circumferential discrepancy of the piston skirt profile of a four-stroke motorcycle engine. These methods were also currently applied to evaluate the circumferential discrepancy of the piston skirt profile of a two-stroke motorcycle engine in industry. However, the piston skirt profile of a two-stroke motorcycle engine is an irregular elliptical shape, theoretically, the above mentioned methods cannot applied directly to evaluate the piston skirt profile of a two-stroke engine. The objective of this study is to introduce the fitness method to evaluate the circumferential discrepancy of the piston skirt profile for a two-stroke engine based on the data points measured on a CNC coordinate measuring machine. This method utilized the Closed B-Spline Curve method to interpolate the internal data points based on the designed profile data points which have an interval of ten degrees, and the concept of minimum sum of error squares to determine the angular deviation of the piston skirt profile. According to the test results, the proposed method could improve the analytic accuracy and had good consistency with the measurement result of the roundness measuring machine.
Chapitres de livres sur le sujet "Piston skirt"
Brabec, P., C. Scholz et R. Voženílek. « Effect of the Piston Pin Stiffness on the Deformation of the Piston Skirt ». Dans Lecture Notes in Mechanical Engineering, 493–99. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05203-8_66.
Texte intégralWu, Bo, Jing-yi Ma et Shaojiang Jin. « Orthogonal Optimal Design of Piston Skirt with Bionic Holes Based on Finite Element Method ». Dans Proceedings of the 6th International Asia Conference on Industrial Engineering and Management Innovation, 799–808. Paris : Atlantis Press, 2015. http://dx.doi.org/10.2991/978-94-6239-148-2_79.
Texte intégralur Rehman, Zahid, S. Adnan Qasim et M. Afzaal Malik. « DLC Coated Piston Skirts Behavior at Initial IC Engine Start Up ». Dans Transactions on Engineering Technologies, 195–212. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8832-8_15.
Texte intégralBalakrishnan, S., S. Howell-Smith, R. H. Rahnejat et D. Dowson. « Investigation of reciprocating conformal contact of piston skirt and ring-pack to cylinder liner under transient condition ». Dans Tribology Series, 265–73. Elsevier, 2003. http://dx.doi.org/10.1016/s0167-8922(03)80054-8.
Texte intégralActes de conférences sur le sujet "Piston skirt"
Littlefair, B., S. Howell-Smith, H. Rahnejat et S. Theodossiades. « Assessment of Thermo-Structural Effects on EHL Piston Skirt Lubrication ». Dans ASME 2012 Internal Combustion Engine Division Spring Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ices2012-81125.
Texte intégralDuyar, Mustafa. « Mass Conserving Elastohydrodynamic Piston Lubrication Model With Incorporated Crown Lands ». Dans ASME 2007 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/icef2007-1710.
Texte intégralNing, Lipu, Xianghui Meng et Youbai Xie. « Numerical Study of Piston Skirt-Liner Lubrication Considering the Effects of Deformation in Internal Combustion Engines ». Dans ASME 2012 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icef2012-92025.
Texte intégralKamiya, Mitsuyoshi, Toshiaki Kobayashi, Yuji Mihara et Tsuneo Someya. « Measurement of Piston Skirt Oil-film Pressure under Piston Slap ». Dans SAE 2007 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2007. http://dx.doi.org/10.4271/2007-01-2215.
Texte intégralKobayashi, Toshiaki. « Prediction of Piston Skirt Scuffing via 3D Piston Motion Simulation ». Dans SAE 2016 World Congress and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2016. http://dx.doi.org/10.4271/2016-01-1044.
Texte intégralWang, Yi, Limin Wu, Shuo Liu, Mei Li, Xianghui Meng et Yi Cui. « Numerical Study on Fretting Wear of Mating Surface Between Piston Crown and Skirt in Heavy Duty Diesel Engine ». Dans ASME 2018 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icef2018-9621.
Texte intégralAbbes, Miloud Tahar, Patrick Maspeyrot, Ahmed Dekkiche, Mohamed Benbrik et Fouad Boukli Hacène. « Elastohydrodynamic Piston Skirt Lubrication : Effect on Tribological Performances ». Dans ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61129.
Texte intégralKeribar, Rifat, et Zafer Dursunkaya. « A Comprehensive Model of Piston Skirt Lubrication ». Dans International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1992. http://dx.doi.org/10.4271/920483.
Texte intégralGunelsu, Ozgur, et Ozgen Akalin. « Development of a Piston Secondary Motion Model for Skirt Friction Analysis ». Dans ASME 2012 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icef2012-92166.
Texte intégralSaito, Yoshitaka, et Hideo Suda. « Varnish Rating of Piston Skirt by Image Processing ». Dans Small Engine Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 1995. http://dx.doi.org/10.4271/951799.
Texte intégralRapports d'organisations sur le sujet "Piston skirt"
Suzuki, Hidekazu, Yasukazu Baba, Noriaki Kadoi et Tomio Obokata. A Study on Factors That Have an Affect on Oil Film Formation on Piston Skirt. Warrendale, PA : SAE International, septembre 2005. http://dx.doi.org/10.4271/2005-08-0614.
Texte intégralNakamura, Masaaki, Hirotsugu Hayashi et Akemi Ito. A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines (Third Report)~Oil Film Boundary on the Piston Skirt. Warrendale, PA : SAE International, mai 2005. http://dx.doi.org/10.4271/2005-08-0368.
Texte intégralIto, Akemi, Haruhisa Shirakawa, Masaaki Nakamura, Kazuyoshi Yoshida et Hisashi Akiyama. A Study on the Mechanism of Lubricating Oil Consumption of Diesel Engines~The Effect of the Design of Piston Skirt on Lubricating Oil Consumption. Warrendale, PA : SAE International, mai 2005. http://dx.doi.org/10.4271/2005-08-0367.
Texte intégral