Abstract
This study explores the design of a low-friction cam/tappet system. An elastohydrodynamic contact analysis is conducted to predict lubricant film-thickness and Hertzian pressures at the cam/tappet contact. In addition, a mixed-friction model that can predict the changes in the cam/tappet interface friction due to changing operating conditions is adopted and integrated into the analysis. Also included in the study is a model of tappet spin allowing for slip at the cam/tappet interface. Modeling tappet spin makes it possible to see the effects of the tappet crown radius and cam-taper angle on the interface frictional loss. Tappet rotation is found to be affected by design and operating conditions, and it is dependent primarily on camshaft speed. It is shown that the tappet crown radius and cam-taper angle can be optimized to lower the energy loss. Valvetrain energy-loss predictions, tappet rotational-speed results, and the effect of tappet spin on energy loss agree with the available experimental data. Pres...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
