RESEARCH PAPERS: Mechanisms Papers

The Development of a Predictive Model for the Optimization of High-Speed Cam-Follower Systems with Coulomb Damping Internal Friction and Elastic and Fluidic Elements

[+] Author and Article Information
Shervin Hanachi

Columbia University, New York, NY 10027; General Motors Research Laboratories, Warren, MI 48090

Ferdinand Freudenstein

Columbia University, New York, NY 10027

J. Mech., Trans., and Automation 108(4), 506-515 (Dec 01, 1986) (10 pages) doi:10.1115/1.3258762 History: Received July 01, 1986; Online November 19, 2009


A highly accurate and predictive dynamic model of a high-speed cam-follower system has been developed and verified. In view of the predominance of Coulomb damping in high-speed cam-follower systems, this form of damping has been used as the chief mode of energy dissipation. This has resulted in a significant improvement in the predictive capability of the dynamic model. The accuracy of the model can also be attributed to careful modeling of system components such as the distributed-parameter modeling of the valve spring, the modeling of the hydraulic lifter, and modeling of the damping due to a nested-valve spring. The latter two represent the first such modeling in the area of cam-follower systems.

Copyright © 1986 by ASME
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