FAULT-TOLERANT BRAKE SYSTEM WITH TWO-WHEEL MANUAL PUSH THROUGH

A fault-tolerant brake system includes two-wheel manual push through for selectively actuating first and second pairs of wheel brakes. A master cylinder is selectively operable during a manual push-through mode by actuation of the brake pedal to generate brake actuating pressure to at least one MC output for actuating the first pair of wheel brakes. A single acting plunger (“SAP”) is operable during a normal non-failure braking mode to generate brake actuating pressure at first and second SAP outputs for hydraulically actuating the first and second pairs of wheel brakes, respectively. A two-position three-way valve (“2P3W valve”) is hydraulically connected with the MC output, the first SAP output, and the first pair of wheel brakes. The 2P3W valve places the front pair of wheel brakes in fluid communication with the SAP in the normal non-failure braking mode and with the master cylinder in the manual push-through braking mode.