Patent ID: 11919500
Assignee: ZF ACTIVE SAFETY US INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A brake system for a vehicle having a pair of front wheel brakes and a pair of rear wheel brakes, the system comprising:
a reservoir;
a master cylinder operable during a manual push-through mode by actuation of a brake pedal connected to the master cylinder to generate brake actuating pressure at a first output for hydraulically actuating at least one of the pair of front wheel brakes and the pair of rear wheel brakes during the manual push-through mode;
a power transmission unit configured for selectively providing pressurized hydraulic fluid for actuating at least a selected one of the pair of front wheel brakes and the pair of rear wheel brakes in a boosted braking mode during a braking event;
a pair of rear brake motors for selectively electrically actuating respective left and right rear wheel parking brakes;
an electronic control unit for controlling at least one of the power transmission unit and the pair of rear brake motors;
a pedal simulator in fluid communication with the master cylinder for providing predetermined brake pedal response;
a two-position three-way valve hydraulically connected with the master cylinder and the power transmission unit and with at least the selected one of the pairs of wheel brakes;
the three-way valve selectively controlling hydraulic fluid flow from a chosen one of the master cylinder and the power transmission unit to at least the selected one of the pairs of wheel brakes;
a normally-closed DAP valve located hydraulically between the power transmission unit and at least one of the three-way valve and at least the selected one of the pairs of wheel brakes; and
an isolation valve and a dump valve associated with each wheel brake of the pair of front wheel brakes and the pair of rear wheel brakes, each isolation valve being located hydraulically between a respective wheel brake and the three-way valve and being connected to the power transmission unit through the three-way valve, and the dump valve being located hydraulically between a respective wheel brake and the reservoir.