Development Of Analysis Model For Piston Movement

Oguri, Akira; Totii, Hisanao; Hosokawa, Tetsuhiro; Nakada, Masahrko

doi:10.4271/885031

Cited by 6 publications

(1 citation statement)

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“…The first model to include elastohydrodynamic lubrication of the piston skirt appeared in the late 1980s [18]. Since then, various numerical models have been developed [1][2][3][4][5][6][7][19][20][21][22]. However, some of these models adopt great simplifying assumptions, such as fully flooded skirts and so on, to which improvements are desirable for detailed engineering design of the piston.…”

Section: Introductionmentioning

confidence: 99%

Effects of Piston Design Parameters on Piston Secondary Motion and Skirt - Liner Friction

Mansouri

Wong

2005

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this article, a previously developed and experimentally validated piston secondary motion model has been improved further numerically and applied to understand the detailed interactions between the piston skirt and the cylinder liner for various piston design parameters. The model considers the roughness of the surfaces and the topography of the skirt in both the axial (barrel profile) and circumferential (ovality) directions. Three modes of lubrication: hydro-dynamic, mixed, and boundary lubrication regimes have been considered and the skirt is partially flooded in most cases. Elastic deformation of the skirt is an essential part of the model. In this model, the piston dynamic behaviour and frictional and impact forces are predicted as functions of crank angle and are examined in detail. Parameters investigated include piston skirt profile, piston-to-liner clearance, surface roughness, and oil availability. The results show that some of these parameters have profound effects on the frictional and impact forces at the piston skirt/liner interface, and therefore, they have the potential to optimize the piston frictional power loss. Correlations and non-dimensional scaling laws are developed to illustrate the basic governing phenomena. These results aim to provide a set of quantitative design guidelines.

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