Analysis and simulation of clutch engagement judder and stick-slip in automotive powertrain systems

Publisher:
Professional Engineering Publishing Ltd
Publication Type:
Journal Article
Citation:
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2004, 218 (12), pp. 1427 - 1446
Issue Date:
2004-01
Full metadata record
Files in This Item:
Filename Description Size
Thumbnail2004000993.pdf1.69 MB
Adobe PDF
Clutch engagement judder and stick-slip are investigated analytically and numerically to examine the influencing factors on these phenomena. Models are developed for a four degree-of-freedom (4DOF) torsional system with slipping clutch and for a powertrain with automatic transmission system. Stability analysis is performed to demonstrate that clutch judder is dependent on the slope of the friction coefficient and the analysis is verified with numerical simulations. An algorithm for modelling stick-slip is developed and is used in numerical simulations which show that the likelihood of stick-slip is increased by clutch pressure fluctuations, judder approaching engagement, and external torque fluctuations. Numerical simulations for second to thin gear up shifts demonstrate that the likelihood of stick-slip to occur from clutch engagement is increased by clutch applied pressure fluctuations, judder approaching engagement, and external torque fluctuations and that the likelihood of stick-slip occurring is decreased dramatically by applied pressure ramps proximus to the engagement point.
Please use this identifier to cite or link to this item: