US 12,145,548 B2
Brake system and method for controlling a brake system
Heinz Leiber, Oberriexingen (DE); and Thomas Leiber, Rogoznica (HR)
Assigned to IPGATE AG, Pfaffikon (CH)
Appl. No. 17/608,471
Filed by IPGATE AG, Pfäffikon (CH)
PCT Filed Jan. 28, 2020, PCT No. PCT/EP2020/051995
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/224814, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. PCT/EP2019/061365 (WO), filed on May 3, 2019; and application No. PCT/EP2019/061371 (WO), filed on May 3, 2019.
Prior Publication US 2022/0250600 A1, Aug. 11, 2022
Int. Cl. B60T 8/40 (2006.01); B60T 8/94 (2006.01); B60T 13/14 (2006.01); B60T 13/58 (2006.01); B60T 13/68 (2006.01); B60T 15/02 (2006.01); B60T 17/22 (2006.01)
CPC B60T 13/686 (2013.01) [B60T 8/4081 (2013.01); B60T 8/94 (2013.01); B60T 13/142 (2013.01); B60T 13/586 (2013.01); B60T 15/028 (2013.01); B60T 17/22 (2013.01); B60T 2270/306 (2013.01); B60T 2270/402 (2013.01); B60T 2270/403 (2013.01); B60T 2270/406 (2013.01); B60T 2270/60 (2013.01)] 17 Claims
OG exemplary drawing
 
14. A method for controlling a brake system that includes a first electromotively driven pressure supply unit arranged to supply pressure medium to at least first and second brake circuits, a motor-pump unit, a second pressure supply unit connected to the motor-pump unit via first and second hydraulic lines and arranged to supply pressure medium to at least one of the first or second brake circuits, wherein the second pressure supply unit comprises a main brake cylinder with exactly one piston and exactly one piston chamber, wherein the main brake cylinder comprises at least one expansion bore connected to a reservoir via a hydraulic line and comprises two ring seals, wherein the at least one expansion bore is arranged between the ring seals, and wherein a throttle is arranged in the hydraulic line between the reservoir and the expansion bore, the method comprising:
a. providing a first pressure at a first connection point for connection to the first brake circuit;
b. providing a second pressure at a second connection point for connection to the second brake circuit;
c. detecting a first fault condition corresponding to a loss of pressure medium in the first brake circuit;
d. closing at least a first isolating valve in response to the detection of the first fault condition, such that the first pressure supply unit is hydraulically decoupled from the first connection point.