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RESEARCH PAPERS: Vibration and Sound

Nonlinear Transient Response of a High Speed Driven Valve System and Stresses in Valve Springs for Internal Combustion Engines

[+] Author and Article Information
K. Nagaya

Department of Mechanical Engineering, Gunma University, Kiryu, Gunma 376, Japan

J. Vib., Acoust., Stress, and Reliab 111(3), 264-271 (Jul 01, 1989) (8 pages) doi:10.1115/1.3269851 History: Received July 01, 1987; Online November 23, 2009

Abstract

This paper presents a method for solving the dynamic response problems of a driven valve system and the stress problem of valve springs for internal combustion engines. In this system there is hysteresis behavior in the spring constants during the rotation of the cam shaft. To treat this nonlinearity, the rigidity of each section is assumed to be one of a partly linear spring. For the valve trains, the cam profile is complex in general. To treat a general cam profile, this paper applies a combination method of the Fourier expansion, the Laplace transform and the analytical connection methods, and gives a response of valve trains. This paper also presents a theoretical result for the stresses in the valve spring due to the motion of the valve train based on the three dimensional curved beam theory.

Copyright © 1989 by ASME
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