Method for detection and enabling of an evasive manoeuver in a vehicle with an automated manual transmission

摘要

A method of detecting and enabling an evasive maneuver in a vehicle with an automated transmission, in which initially the method checks whether the reverse (R) drive is engaged, and checks whether the steering-wheel angle and the steering-wheel angular velocity are valid and in excess of threshold values. If so, a first timer is started and then the method checks to see if the yaw rate and the transverse acceleration of the vehicle exceed threshold values while the first timer is running, and when the yaw rate and the transverse acceleration of the vehicle exceed threshold values while the first timer is running, a driver's wish to carry out an escape turn is recognized and a second timer is started, and both timers have not yet run their course, the speed threshold for permitting engagement of the forward drive (D) is increased to exceed the normal threshold value for permitting engagement of forward drive (D) is a is a set is positioned.

主权项

1. A method of recognizing and enabling an evasive manoeuver of changing a direction of travel through 180 degrees while driving in a reverse drive mode in a vehicle with an automated transmission, the method comprising the steps of:
initiating the method, with a transmission control unit, while driving the vehicle in the reverse drive mode at a speed that is either greater than or equal to a normal speed threshold value, below which engagement of a forward drive mode is permissible, checking with the transmission control unit whether sensor values for a steering-wheel angle and a steering-wheel angular velocity are valid, and whether the steering-wheel angle and the steering-wheel angular velocity sensor values are in excess of predetermined threshold values, starting a first timer, with the transmission control unit, if the steering-wheel angle and the steering-wheel angular velocity sensor values are valid, and the steering-wheel angle and the steering-wheel angular velocity sensor values exceed the predetermined threshold values, and then checking with the transmission control unit whether sensor values for yaw rate and transverse acceleration of the vehicle are valid, and whether the sensor values for the yaw rate and the transverse acceleration of the vehicle are in excess of respective predetermined threshold values while the first timer is still running, and when (a) the sensor values for the yaw rate and the transverse acceleration of the vehicle are valid, (b) the sensor values for the yaw rate and the transverse acceleration of the vehicle are in excess of the respective predetermined threshold values, and (c) the first timer is still running, then detecting with the transmission control unit a driver's request to carry out the evasive manoeuver and starting a second timer with the transmission control unit, provided that the first and the second timers are still running, increasing with the transmission control unit the normal speed threshold value for permissible engagement of the forward (D) drive mode to a predefined speed threshold value which is higher than the normal threshold value for the permissible engagement of the forward (D) drive mode, and engaging the forward drive mode in the automated transmission at a higher speed than the normal speed threshold value.