Method for monitoring the vehicle handling of a two track vehicle

US8280591B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Benan Serarslan · Munich, DE
• Max Von Groll · Palo Alto, US
• Stefan Gietl · Munich, DE

Key dates

• Filing date: Jul 11, 2008
• Grant date: Oct 2, 2012
• Expiry date: Jun 7, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2230/02
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method monitors the vehicle handling of a vehicle with respect to vehicle stability by comparing a measured variable, which reflects the yaw rate or the lateral acceleration, with a comparison value, which is derived from the steering angle, specified by the driver. The gradients of the regression lines, which are normalized in relation to each other, of the measured variable, on the one hand, and the comparison value, which represents the steering angle, on the other hand, are compared continuously over a number of analysis time windows. Upon finding a significant deviation between these gradients, an unstable driving condition is concluded. The difference between the gradients of the regression lines, which may be determined by a first order least squares method and normalized to the same units by a suitably applied amplification factor, are determined and compared with a suitably determined limit value, above which an instability is inferred. Alternatively, the measured variable and the comparison value, which represents the steering angle, can be analyzed for a linear or nonlinear dependence within an analysis time window by a coherence analysis; and on detection of a notewor…