Rotational Response and Slip Prediction of Serpentine Belt Drive Systems

[+] Author and Article Information
S.-J. Hwang, N. C. Perkins, A. G. Ulsoy

Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109-2125

R. J. Meckstroth

FEAD Design Department, Ford Motor Company, Dearborn, MI 48121

J. Vib. Acoust 116(1), 71-78 (Jan 01, 1994) (8 pages) doi:10.1115/1.2930400 History: Received July 01, 1992; Revised January 01, 1993; Online June 17, 2008


A nonlinear model is developed which describes the rotational response of automotive serpentine belt drive systems. Serpentine drives utilize a single (long) belt to drive all engine accessories from the crankshaft. An equilibrium analysis leads to a closed-form procedure for determining steady-state tensions in each belt span. The equations of motion are linearized about the equilibrium state and rotational mode vibration characteristics are determined from the eigenvalue problem governing free response. Numerical solutions of the nonlinear equations of motion indicate that, under certain engine operating conditions, the dynamic tension fluctuations may be sufficient to cause the belt to slip on particular accessory pulleys. Experimental measurements of dynamic response are in good agreement with theoretical results and confirm theoretical predictions of system vibration, tension fluctuations, and slip.

Copyright © 1994 by The American Society of Mechanical Engineers
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