US 12,311,902 B2
Apparatus and method for control of a hydraulic brake system
Blaise J. Ganzel, Ann Arbor, MI (US)
Assigned to ZF ACTIVE SAFETY US INC., Livonia, MI (US)
Filed by ZF Active Safety US Inc., Livonia, MI (US)
Filed on Aug. 12, 2021, as Appl. No. 17/400,386.
Prior Publication US 2023/0048177 A1, Feb. 16, 2023
Int. Cl. B60T 7/04 (2006.01); B60T 8/40 (2006.01); B60T 13/16 (2006.01); B60T 13/68 (2006.01); B60T 13/74 (2006.01)
CPC B60T 7/042 (2013.01) [B60T 8/4081 (2013.01); B60T 13/168 (2013.01); B60T 13/686 (2013.01); B60T 13/745 (2013.01); B60T 2270/402 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A brake system for actuating a pair of front wheel brakes and a pair of rear wheel brakes, the system comprising:
a reservoir;
first and second power transmission units configured for selectively providing pressurized hydraulic fluid for actuating a corresponding one of the pair of front wheel brakes and the pair of rear wheel brakes during a braking event;
first and second electronic control units for controlling the first and second power transmission units, respectively; and
a multiplex control valve arrangement having a pair of normally open, iso-type valves arranged in parallel with one another and hydraulically interposed between a respecting power transmission unit and each wheel brake of the corresponding one of the pair of front wheel brakes and the pair of rear wheel brakes, the multiplex control valve arrangement for a selected one of the pair of front wheel brakes and the pair of rear wheel brakes being controlled by the first or second electronic control unit that controls the first or second power transmission unit corresponding to the selected one of the pair of front wheel brakes and the pair of rear wheel brakes.