Title: The friction force of piston assembly in an IDI diesel engine

Authors: Sung Woo Cho, Jeong Eui Yun

Addresses: Engine Laboratory, Department of Mechanical Engineering, Kaist, 373-1, Kusong-dong, Yusung-ku, Taejeon 305-701, Korea. ' Engine Test Team, IAE-Bupyung/Daewoo Motor Co. Ltd., Choung Chon-Dong 199, Bupyung-Ku, Inchon, Korea

Abstract: For this study, a reliable measurement system of piston assembly frictional force was constructed. This not only requires smaller installation space than the existing so-called |movable bore system|, but also reduces errors induced by piston thrust and slap impulse. The present system is an improvement over the original because the top of the movable bore is detachable, enabling easy piston removal without touching the crankshaft. This system evaluated the effects of engine speed, oil viscosity, engine load, and the elastic contact pressure of piston rings on piston frictional force. Proportions of friction forces generated by each member of the piston assembly were also measured.

Keywords: detachable bore-top; friction; IDI diesel engines; movable bore system; piston assembly; vehicle design.

DOI: 10.1504/IJVD.1998.062094

International Journal of Vehicle Design, 1998 Vol.19 No.1, pp.50 - 64

Published online: 29 May 2014 *

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