In order to predict cam wear in valve trains of engines quantitatively, multi-body system dynamic analysis, finite element quasi-statics contact analysis and numerical calculation of elastohydrodynamic lubrication are applied to obtain the dynamic loads, the time histories of contact pressure and the oil film thicknesses in a cam-tappet pair. Using this methodology, the wear depth of the cam in the valve train of a heavy load diesel engine is calculated, which is in good agreement with the measured value in the practical tests. The results show that the cam-tappet is operated in a mixed lubricant or a boundary lubricant regime and the wear depths on both the sides of the cam have been found to be the greatest.
Simulation of Cam Wear in Valve Trains of Diesel Engines
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
SAE 2014 International Powertrain, Fuels & Lubricants Meeting ; 2014
Sae International Journal of Fuels and Lubricants ; 7 , 3 ; 1004-1009
2014-10-13
6 pages
Conference paper
English
Simulation of Cam Wear in Valve Trains of Diesel Engines
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