RESEARCH PAPERS: Mechanisms and Robotics Papers

Experimental Study of a Variable Pressure Damper on an Automotive Valve Train

[+] Author and Article Information
Jin Jang Liou, Grodrue Huang, Wensyang Hsu

Institute of Mechanical Engineering, National Chiao Tung University, Taiwan, ROC

J. Mech. Des 120(2), 279-281 (Jun 01, 1998) (3 pages) doi:10.1115/1.2826969 History: Received August 01, 1996; Online December 11, 2007


A variable pressure damper (VPD) is proposed here to adjusted the friction force on the valve spring to investigate the relation between the friction force and the valve train. Valve bounce, component separation, spring vibration are observed in the testing. The VPD is shown to have significant improvement in reducing valve bouncing distance and surge vibration under 2985 rpm. Also, experimental results indicate that the component separation becomes more imminent at high speeds with larger damping forces. Here, in certain speed range, a proper frictional force provided by VPD is shown to be able to eliminate bouncing completely without causing component separation.

Copyright © 1998 by The American Society of Mechanical Engineers
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