US 12,330,617 B2
Method for operating a brake system of a motor vehicle
Andreas Hoehn, Dreikirchen (DE); and Toni Streit, Waldbrunn (DE)
Assigned to ZF Active Safety GmbH, Koblenz (DE)
Filed by ZF Active Safety GmbH, Koblenz (DE)
Filed on Nov. 4, 2022, as Appl. No. 17/980,777.
Claims priority of application No. 102021128764.2 (DE), filed on Nov. 4, 2021.
Prior Publication US 2023/0136153 A1, May 4, 2023
Int. Cl. B60T 8/1755 (2006.01); B60T 7/12 (2006.01)
CPC B60T 8/17554 (2013.01) [B60T 7/12 (2013.01); B60T 2220/03 (2013.01); B60T 2230/03 (2013.01); B60T 2240/00 (2013.01); B60T 2240/06 (2013.01); B60T 2250/00 (2013.01); B60T 2250/03 (2013.01); B60T 2250/04 (2013.01); B60T 2270/30 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of operating a brake system of at least a double-track motor vehicle comprising two breakable wheels arranged at opposite ends of an axle, and a rollover protection system, wherein the rollover protection system can cause braking of the wheels in order to prevent a rollover situation, the method comprising:
in a case where the rollover protection system detects a first potential rollover situation, causing of automatic braking of a first breakable wheel of the axle, which is an outer wheel opposite a first turning direction and which is loaded more greatly when the motor vehicle is cornering in the first turning direction, by way of the rollover protection system;
while the first breakable wheel of the axle is being automatically braked during the cornering, detecting a counter-steering movement of the motor vehicle based on a predefined steering angle change being exceeded in a predefined time period in a second turning direction counter to the first turning direction;
in response to detecting the counter-steering movement of the motor vehicle, causing of a gradual automatic braking of a second breakable wheel of the axle, which is an inner wheel toward the first turning direction and which is loaded less greatly than the first breakable wheel with a first brake force, by way of the rollover protection system, while continuing the automatic braking of the first breakable wheel during a direction change of the counter-steering movement, corresponding to a straightahead driving phase, in a case where a lateral acceleration, during the straightahead driving phase, is lower than a predefined threshold; and
in a case where the rollover protection system detects a second potential rollover situation while the second breakable wheel of the axle is being automatically braked during the counter-steering movement of the motor vehicle with the first brake force, causing a reduction of the braking of the first breakable wheel to a middle level, that is held during the straightahead driving phase, and simultaneously causing a rapid automatic braking of the second breakable wheel of the axle, which is now loaded more greatly than the first breakable wheel, with a second brake force larger than the first brake force.