Title: Development of analysis model for optimising piston skirt profile

Authors: Chuan-Ju Chen, Jian Wu, Xi Chen

Addresses: Institute of Vehicle and Engine Engineering, Henan University of Science and Technology, Luoyang 471003, Province Henan, China. ' Institute of Vehicle and Engine Engineering, Henan University of Science and Technology, Luoyang 471003, Province Henan, China. ' Research and Development Department, China North Industries Corporation (NORINCO), Beijing 100053, China

Abstract: In this paper an optimum profile of piston skirt is chosen. First, an oval–hyperboloid is employed to describe the piston skirt surface in running conditions. Second, the Reynolds Equation, which describes the lubrication of piston skirt, is solved with finite element modelling. To find an optimum profile for the piston skirt, the curvature and the peak coordinate of the oval–hyperboloid are changed. Once the optimum profile is found, the profile at room temperature is decided by considering the deformations and the size tolerances of piston and cylinder, and the clearance between piston and liner.

Keywords: piston skirt profile; hydrodynamic lubrication; tribology; Reynolds equation; curvature; oval hyperboloid; roughness; vehicle design; finite element method; FEM; modelling; deformation; size tolerances; engine noise; vibration; cavitation.

DOI: 10.1504/IJVD.2010.034100

International Journal of Vehicle Design, 2010 Vol.53 No.4, pp.239 - 259

Published online: 12 Jul 2010 *

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