US 12,296,810 B2
Hydraulic system having at least two hydraulic circuits and two pressure supply devices
Thomas Leiber, Rogoznica (HR); Heinz Leiber, Oberriexingen (DE); and Anton Van Zanten, Ditzingen (DE)
Assigned to IPGATE AG, Pfaffikon (CH)
Appl. No. 17/429,403
Filed by IPGATE AG, Pfäffikon (CH)
PCT Filed Jul. 10, 2019, PCT No. PCT/EP2019/068596
§ 371(c)(1), (2) Date Aug. 9, 2021,
PCT Pub. No. WO2020/164755, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 20 2019 101 596.9 (DE), filed on Feb. 12, 2019.
Prior Publication US 2022/0144231 A1, May 12, 2022
Int. Cl. B60T 8/32 (2006.01); B60T 8/40 (2006.01); B60T 13/14 (2006.01); B60T 13/68 (2006.01); F15B 11/17 (2006.01); F15B 11/22 (2006.01); F15B 13/02 (2006.01); F15B 13/06 (2006.01)
CPC B60T 8/326 (2013.01) [B60T 8/40 (2013.01); B60T 8/4022 (2013.01); B60T 8/4054 (2013.01); B60T 8/4081 (2013.01); B60T 13/686 (2013.01); F15B 11/17 (2013.01); F15B 11/22 (2013.01); F15B 13/025 (2013.01); F15B 13/06 (2013.01); B60T 13/142 (2013.01); B60T 2270/402 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for generating brake force in a vehicle having a brake system, the brake system comprising:
at least two electromotively driven pressure supply devices, wherein one of the pressure supply devices comprises a piston pump or gear pump driven by an electromotive drive and is enabled to provide continuous volume delivery,
first hydraulic brake circuit and a second hydraulic brake circuit, each with at least one or two hydraulically acting wheel brakes, wherein pressure is enabled to both be built up and reduced in at least one of the first hydraulic brake circuit or the second hydraulic brake circuits by means of at least one of the pressure supply devices,
at least one valve arrangement, having valves for wheel-specific setting of brake pressures and/or for isolation or connection of the wheel brakes from or to respective brake circuits and/or at least one of the pressure supply devices, and
at least one electronic open-loop and closed-loop control unit arranged to control the brake system or of parts thereof,
wherein each brake circuit has a respective hydraulic main line, via which the wheel brakes are connected or connectable to each of the two pressure supply devices, and
wherein the brake system further comprises:
an electric brake pedal as an actuation unit, with a sensor electronic control unit (S-ECU) and control by means of a central control unit (CCU), wherein a driver demand from the S-ECU is transmitted via at least two redundant signal lines via the CCU to at least one of the pressure supply devices, or
a master brake piston-cylinder unit, actuatable by an actuation unit in the form of a brake pedal, having only one piston, wherein one pressure chamber of the master brake piston-cylinder unit is connected to a travel simulator and is connectable to at least one of the hydraulic brake circuits via a hydraulic line, and wherein at least one controlled valve of the at least one valve arrangement is provided for shutting off the hydraulic line,
wherein the hydraulic lines, solenoid valves of the at least one valve arrangement, and hydraulic elements for pressure generation of the pressure supply devices are arranged in one structural unit or one hydraulics housing, and wherein the actuation unit is arranged in a separate housing.