US 12,122,375 B2
Method for operating a motor vehicle, control unit, motor vehicle
Alexander Trofimov, Ludwigsburg (DE); and Franz Dahlke, Karlsruhe (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/264,142
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Aug. 1, 2019, PCT No. PCT/EP2019/070846
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/048695, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 102018214953.4 (DE), filed on Sep. 4, 2018.
Prior Publication US 2021/0354693 A1, Nov. 18, 2021
Int. Cl. B60W 30/14 (2006.01); B60L 15/20 (2006.01); B60T 13/58 (2006.01); B60W 10/08 (2006.01); B60W 10/18 (2012.01)
CPC B60W 30/14 (2013.01) [B60L 15/20 (2013.01); B60T 13/586 (2013.01); B60W 10/08 (2013.01); B60W 10/18 (2013.01); B60L 2240/12 (2013.01); B60L 2240/423 (2013.01); B60T 2220/04 (2013.01); B60T 2250/04 (2013.01); B60T 2270/604 (2013.01); B60W 2520/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for operating a motor vehicle, which includes a drive system including an electric drive machine, a friction braking system, and an actuating element, the actuating element being continuously movable between a first end state and a second end state, a position of the actuating element in the first end state corresponding to a percentage value of 0%, and the position of the actuating element in the second end state corresponding to a percentage value of 100%, the method comprising the following steps:
predefining an acceleration torque for the motor vehicle when the position of the actuating element has a percentage value that is greater than a predefined threshold value;
predefining a deceleration torque for the motor vehicle when the position of the actuating element has a percentage value that is less than the threshold value; and
activating the friction braking system in such a way that the friction braking system generates, at least partially, the predefined deceleration torque, wherein:
a relative speed of the motor vehicle to ground is detected, and the predefined deceleration torque is changed as a function of the detected relative speed,
the predefined deceleration torque is reduced with a reduction of the relative speed,
a first threshold speed is predefined, the predefined deceleration torque being reduced only when the detected relative speed is less than the first threshold speed, and
a second threshold speed is predefined, which is greater than the first threshold speed, the predefined deceleration torque being increased with the reduction of the relative speed when a relative speed is detected, which is greater than the first threshold speed and less than the second threshold speed.