Simulation of Secondary Motion of Piston Assemblies

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Journal of the Korea Institute of Military Science and Technology 2000;3(2):231-243.

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²

피스톤 어셈블리의 2차 운동에 관한 시뮬레이션

오병근, 조남효

¹고등기술연구원, 아주대학교 시스템공학과
²고등기술연구원 동력시스템연구실

Abstract

This paper describes a simulation of secondary motion of piston assemblies using PISDYN by Ricardo. Motions of the piston, pin, rod and skirt are separately calculated, by integrating equations of motion for individual components and dynamic degrees of freedom. The effects of engine speed at full load and pin offsets on the piston assembly secondary motions, forces and friction were investigated in parametric study for 4-cylinder gasoline engine. Results show that lateral displacement and friction loss of the piston increase as a function of engine speed. The lateral motion of the piston is affected by the change in pin offset. The minimum friction loss for the condition of 4800rpm WOT occurs at a pin offset of 1.6mm.

Key Words: Piston Assembly, Pin Offset, Friction Loss, Secondary Motion, Engine Speed, WOT