Steering angle detection by means of ESC and EPAS

• Main Authors: THOENE ALOIS, HESTERMEYER THORSTEN WILHELM, FRESE THOMAS
• Format: Patent
• Language: English
• Published: 22.05.2008
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; PHYSICS; TRAILERS; TRANSPORTING

The invention relates to a method for detecting a steering wheel position of a motor vehicle which has an evaluation unit and a servo-assisted steering device, a position sensor being assigned to the servo-assisted steering device. After loss of an on-board power system voltage, the servo-assisted steering device conducts a steering angle value which is absolute at least in one circular segment to the evaluation unit. The evaluation unit detects an absolute steering angle position which is transmitted to the servo-assisted steering device which accepts the absolute value obtained from the evaluation unit. The servo-assisted steering device continues to monitor the absolute steering angle even when the ignition is switched off, and it conducts the current value to the evaluation unit in the switched-on state of the motor vehicle so that the evaluation unit checks the plausibility of the value obtained from the servo-assisted steering device and conducts it back to the servo-assisted steering device which accepts the obtained value.