The effect of groove texture patterns on piston-ring pack friction
TypeArticle dans des revues avec comité de lecture
A cylinder liner possesses fairly intricate surface requirements due to its complicated functions. It needs to provide adequate surface roughness to resist wear as well as to store and retain lubricants during high temperatures. The liner surface texture is anisotropic, produced by the honing process, with resultant deep visible scratches left on it . The prominence of the honing grooves observed suggests that surface texture significantly affects ring-pack performance, although this effect is not clearly understood. In this paper, a numerical model was developed to investigate the effects of groove characteristics on the lubrication condition and friction at the interface between the piston ring and cylinder liner. This model aims to solve the average Reynolds equation, which depends on the real surface topographies of the cylinder liner, and describes the influence of surface irregularities on the lubricant flow under hydrodynamic lubrication conditions, considering lubricant film rupture and cavitations. Numerical results help to determine the optimum lateral groove characteristics to reduce friction and then noxious emissions.
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DEMIRCI, Ibrahim; MEZGHANI, Sabeur; YOUSFI, Mohammed; ZAHOUANI, Hassan; EL MANSORI, Mohamed (2013)The reduction of friction and the limitation of emissions of greenhouse gases are the main objectives of the automotive industry. This energy e ciency is related to functionalization of the surface of ringpack tribo-system. ...
DEMIRCI, Ibrahim; MEZGHANI, Sabeur; YOUSFI, Mohammed; ZAHOUANI, Hassan; EL MANSORI, Mohamed (STLE, 2012)Multistage abrasive finishing processes (grinding, polishing, honing, etc.) are commonly used to produce the geometrical properties of a surface to meet its technical functionalities in the operating characteristics of ...
Energy efficiency optimization of engine by frictional reduction of functional surfaces of cylinder ring-pack system MEZGHANI, Sabeur; DEMIRCI, Ibrahim; EL MANSORI, Mohamed; ZAHOUANI, Hassan (Elsevier, 2013)Friction reduction, lower oil consumption, and limitation of greenhouse gases emissions are the chief objectives of the automotive industry in order to improve the environmental efficiency of vehicle engines. In this paper, ...
MEZGHANI, Sabeur; DEMIRCI, Ibrahim; YOUSFI, Mohammed; EL MANSORI, Mohamed (Elsevier, 2013)The texture change during running-in alters the performance and efficiency of a tribo-mechanical system. During mass production of cylinder liners, a final finishing stage known as ‘‘plateau honing’’ is commonly added to ...
Mutual effect of groove size and anisotropy of cylinder liner honed textures on engine performances YOUSFI, Mohammed; MEZGHANI, Sabeur; DEMIRCI, Ibrahim; EL MANSORI, Mohamed (scientific, 2014)The cylinder liner surface texture, widely generated by the honing technique, contributes a lot on engine functional performances (friction, oil consumption, running-in, wear etc.). In order to improve these functional ...