Effect of Valve-Cam Ramps on Valve Train Dynamics 1999-01-0801
Testing of an OHC valve train with hydraulic lash adjuster in which the valve displacements, velocities and accelerations were measured and analyzed in both time and frequency domains, coupled with analysis of the frequency content of the valve acceleration function and its ramps, show that traditional designs of the opening and closing ramps used on some IC engine valve cams can exacerbate vibration in the follower system causing higher levels of spring surge and noise. Suggestions are made for improvement to the design of the beginning and ending transitions of valve motion which can potentially reduce dynamic oscillation and vibration in the follower train.
Citation: Norton, R., Eovaldi, D., Westbrook, J., and Stene, R., "Effect of Valve-Cam Ramps on Valve Train Dynamics," SAE Technical Paper 1999-01-0801, 1999, https://doi.org/10.4271/1999-01-0801. Download Citation
Author(s):
Robert L. Norton, David Eovaldi, James Westbrook, Ronald L. Stene
Affiliated:
Worcester Polytechnic Institute, Chrysler Corp.
Pages: 10
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SI Engine Components and Technology-SP-1437
Related Topics:
Valve trains
Cams
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