Model of resisting additional yaw torque after tyre blowout on a vehicle. (11th December 2014)

• Record Type: Journal Article
• Authors: Chen, Qingzhang; Li, Xuezhi; Zhao, Genlin; Weaver, Jonathan M.
• Is Part Of: International journal of vehicle safety. Volume 8:Number 1(2015)
• Page Start: 55
• Page End: 64
• Publication Date: 2014-12-11
• Subjects: vehicle safety -- vehicle dynamics -- stability control -- tyre blowout -- yaw torque -- resist torque -- vehicle testing -- modelling -- electric–hydraulic brakes -- EHB -- vehicle control -- vehicle stability -- emergency braking; Automobiles -- Design and construction -- Periodicals; Automobiles -- Safety measures -- Periodicals; 629.222028905
• Languages: English
• ISSNs: 1479-3105

Abstract

Based on analysis of the tyre blowout vehicle dynamics, a model that estimates the additional yaw torque generated by a tyre blowout is developed. Without corrective action by either the vehicle or the driver, this yaw torque can result in a vehicle tracking error and/or difficulty in maintaining control during emergency braking. It is proposed to use the estimated yaw torque along with the vehicle's Electric–Hydraulic Brake (EHB) system to mitigate the control and stability effects of a tyre blowout. The proposed system manipulates the brake cylinder valves so as to balance the yaw torque generated by the blowout. Knowledge of the estimated yaw torque is a precondition to improving the response time of the EHB braking system when a blowout occurs. A physical test is employed to verify the model used to demonstrate the yaw stability improvement gained by using this estimated yaw torque in conjunction with the EHB system to improve control and stability when a blowout occurs.