An Explanation for Brake Groan Based on Coupled Brake-Driveline System Analysis

2007-01-2260

05/15/2007

Event
SAE 2007 Noise and Vibration Conference and Exhibition
Authors Abstract
Content
Brake creep-groan is studied via a friction coupled torsional model consisting of driveline and brake sub-systems. The model captures the main torsional modes of interest while a suitable reduction of higher degree-of-freedom models allows selection of appropriate parameters. Numerical simulations are programmed that capture groan response with stick-slip friction and transient brake pressure. The vehicle is initially at rest and the groan may build into a steady state limit cycle, depending on the brake force actuation. For automatic transmission (AT) the driving torque is at the torque converter. For manual transmission (MT) the vehicle is on a slope and the driving torque is due to weight of the vehicle. On-vehicle tests provide time and frequency domain measured accelerations for comparison.
Meta TagsDetails
DOI
https://doi.org/10.4271/2007-01-2260
Pages
12
Citation
Crowther, A., Yoon, J., and Singh, R., "An Explanation for Brake Groan Based on Coupled Brake-Driveline System Analysis," SAE Technical Paper 2007-01-2260, 2007, https://doi.org/10.4271/2007-01-2260.
Additional Details
Publisher
Published
May 15, 2007
Product Code
2007-01-2260
Content Type
Technical Paper
Language
English