Patent ID: 9371844
Filing Date: 2016-06-21
CPC Classification: B60T,F15B

Claim Text:
1. A brake system comprising: a brake pedal; a pedal simulator; a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit; a hydraulic pressure source for supplying fluid at a controlled boost pressure; and a hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively; wherein said first and second output pistons are aligned axially with respect to one another and configured in a nested arrangement such that a portion of one output piston is disposed in a recess of the other output piston.