Patent ID: 11951956
Assignee: ZF ACTIVE SAFETY US INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 16:
17. A brake system, comprising:
a single chamber power transmission unit;
a plurality of wheel brakes;
an iso/dump control valve arrangement associated with each wheel brake of the plurality of wheel brakes;
a reservoir hydraulically connected to the single chamber power transmission unit and to each of the iso/dump control valve arrangements;
a pump piston associated with at least one wheel brake of the plurality of wheel brakes, the pump piston being driven by a second electric motor for selectively providing pressurized hydraulic fluid from the reservoir to the iso/dump control valve arrangement of the at least one associated wheel brake;
first and second switching valves, being two-position, three-way type valves, the first and second switching valves each being hydraulically interposed between at least one iso/dump control valve arrangement and both of a selected pump piston and the output line of the single chamber power transmission unit, the first switching valve being in fluid communication with an associated iso/dump control valve arrangement via a first-side line and the second switching valve being in fluid communication with an associated iso/dump control valve arrangement via a second-side line;
a first electronic control unit operative to control the electric motor of the single chamber power transmission unit and at least one of the first and second switching valves; and
a second electronic control unit operative to control the second electric motor and at least one of the iso/dump control valve arrangements.