This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Transient Clunk Response of a Driveline System: Laboratory Experiment and Analytical Studies
Technical Paper
2007-01-2233
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A laboratory experiment is designed to examine the clunk phenomenon. A static torque is applied to a driveline system via the mass of an overhanging torsion bar and electromagnet. Then an applied load may be varied via attached mass and released to simulate the step down (tip-out) response of the system. Shaft torques and torsional and translational accelerations are recorded at pre-defined locations. The static torque closes up the driveline clearances in the pinion/ring (crown wheel) mesh. With release of the applied load the driveline undergoes transient vibration. Further, the ratio of preload to static load is adjusted to lead to either no-impact or impact events. Test A provides a ‘linear’ result where the contact stiffness does not pass into clearance. This test is used for confirming transient response and studying friction and damping. Test B is for mass release with sufficient applied torque to pass into clearance, allowing the study of the clunk. A set of non-linear differential equations describe the experiment and the applicable dry friction coefficients are experimentally found. Various test conditions (corresponding to no impacts, and single-sided or double-sided impacts) are successfully simulated. Numerical and experimental time histories compare well.
Recommended Content
Authors
Citation
Gurm, J., Chen, W., Keyvanmanesh, A., Abe, T. et al., "Transient Clunk Response of a Driveline System: Laboratory Experiment and Analytical Studies," SAE Technical Paper 2007-01-2233, 2007, https://doi.org/10.4271/2007-01-2233.Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- Krenz R. A. “Vehicle Response to Throttle Tip-In/Tip-Out” SAE Paper No. 850967
- Crowther A.R. Singh R. Zhang N. Chapman C. “Impulsive Response of an Automatic Transmission System with Multiple Clearances: Formulation, Simulation and Experiment” Journal of Sound and Vibration September 2006
- Johansson S. Langjord E. Pettersson S. “Objective Evaluation of Shunt and Shuffle in Vehicle Powertrains” 7 th International Symposium on Advanced Vehicle Control Arnhem, The Netherlands August 2004
- Crowther A.R. Zhang N. Singh R. ‘Development of Clunk Simulation Model for a Rear Wheel Drive Vehicle With Automatic Transmission’ SAE Noise and Vibration Conference Traverse City, Michigan May 2005 SAE Paper No. 2005-01-2292
- Kim T. C. Rook T.E. Singh R. “Effect of Smoothening Functions on the Frequency Response of an Oscillator with Clearance Non-Linearity” Journal of Sound and Vibration 2003 263 3 665 678
- Crowther A.R. Janello C. Singh R. “Quantification of Impulsive Phenomena in Torsional Systems with Clearances” Journal of Sound and Vibration October 2006