Apparatus and method for preventing instabilities in vehicle handling

US5341297A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Adam Zomotor · Waiblingen, DE
• Walter Klinkner · Stuttgart, DE
• Erich Schindler · Unterweissach, DE
• Frank Mohn · London, GB
• Thomas Wohland · Stuttgart, DE

Key dates

• Filing date: Jul 1, 1992
• Grant date: Aug 23, 1994
• Expiry date: Jul 1, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/4809
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method and apparatus prevents instabilities in vehicle handling by forming a desired value of the vehicle yaw angle rate .mu..sub.des from measured values (namely, vehicle speed, steering wheel angle), and forming the actual value of the vehicle yaw angle rate .mu..sub.act from at least one sensor signal. The difference between the desired value of the yaw angle rate .mu..sub.des and the actual value of the yaw angle rate .mu..sub.act is formed by subtracting the actual value of the yaw angle rate .mu..sub.act from the desired value of the yaw angle rate .mu..sub.des. At least one output signal is generated and emitted by the computer unit, from this difference. The output signal represents the detected driving situation with respect to the yaw behavior of the vehicle, with the brake pressure of individual wheels of the vehicle being varied as a function of this output signal, and the output signal being generated in the computer unit as a function of a time derivative of the difference. The output signal contains information on whether the vehicle has understeering or oversteering handling. In the case of oversteering handling, the brake pressure is increased for the vehicle fro…