US 12,240,427 B2
Fast replenishing 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 Mar. 30, 2022, as Appl. No. 17/708,153.
Prior Publication US 2023/0311833 A1, Oct. 5, 2023
Int. Cl. B60T 13/68 (2006.01); B60T 7/04 (2006.01); B60T 8/32 (2006.01); B60T 13/14 (2006.01); B60T 13/58 (2006.01)
CPC B60T 13/686 (2013.01) [B60T 7/042 (2013.01); B60T 8/326 (2013.01); B60T 13/148 (2013.01); B60T 13/58 (2013.01); B60T 2270/10 (2013.01); B60T 2270/402 (2013.01); B60T 2270/403 (2013.01); B60T 2270/404 (2013.01); B60T 2270/82 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A fast-replenishing brake system, comprising:
a source of pressurized fluid;
a plurality of wheel brakes;
an iso/dump control valve arrangement associated with at least one wheel brake of the plurality of wheel brakes;
a reservoir hydraulically connected to the source of pressurized fluid and to the iso/dump control valve arrangement;
an electronic control unit operative to control the source of pressurized fluid and the iso/dump control valve arrangement; and
a fast-replenishing circuit, comprising a FR iso valve, a venting valve, and a replenishing check valve, the venting and replenishing check valves being interposed hydraulically between the source of pressurized fluid and the reservoir, and the FR iso valve being interposed hydraulically between the source of pressurized fluid and the iso/dump control valve arrangement;
wherein, when the source of pressurized fluid reaches a predetermined stroke position, the FR iso valve is energized to restrict movement of fluid from at least one iso/dump control valve arrangement to the source of pressurized fluid, and the source of pressurized fluid is re-stroked to draw fluid from the reservoir through the replenishing check valve of the fast-replenishing circuit;
wherein the electronic control unit is a first electronic control unit, the source of pressurized fluid is a first source of pressurized fluid, the iso/dump control valve arrangement is a first iso/dump control valve arrangement, and the fast-replenishing circuit is a first fast-replenishing circuit;
wherein the brake system includes a second electronic control unit, a second source of pressurized fluid, a second iso/dump control valve arrangement, and a second fast-replenishing circuit associated with the second source of pressurized fluid;
wherein the second electronic control unit is operative to control the second source of pressurized fluid and the second iso/dump control valve arrangement;
wherein the first source of pressurized fluid supplies pressurized hydraulic fluid to at least one chosen wheel brake of the plurality of wheel brakes via the first iso/dump control valve arrangement; and
wherein the second source of pressurized fluid supplies pressurized hydraulic fluid to at least one other wheel brake of the plurality of wheel brakes via the second iso/dump control valve arrangement.