Patent ID: 8532870
Filing Date: 2013-09-10
Classification: B60T,B60W

Abstract:
1. A driver assistance system for a motor vehicle/trailer combination having a towing vehicle and at least one trailer, comprising: a first sensor unit for detecting dynamics of the motor vehicle including a velocity, a yaw rate, and a turning angle of the motor vehicle; a second sensor unit for detecting dynamics of the trailer including at least two measured distances between the motor vehicle and the trailer, a first distance measured from a passenger side ultrasonic sensor and a second distance measured from a driver side ultrasonic sensor; an electronic analysis unit for analyzing data of the second sensor unit and determining a swinging amplitude from a difference between the first measured distance and the second measured distance; and an output unit for outputting an instability signal, which indicates a dynamic instability of the trailer when the swinging amplitude is greater than an upper threshold or less than a lower threshold, and having at least one assistance function which determines a limiting value a wherein the analysis unit is configured to calculate a curvature of a course traveled by the motor vehicle/trailer combination on the basis of the detected dynamics at the first sensor unit and to correct a difference of the distances measured by the passenger side ultrasonic sensor and the driver side ultrasonic sensor by a component which is caused by the course curvature, and to output the corrected difference as a variable which is representative of a tendency of the trailer to break away.