Piston pump for brake system with piston pump
AssigneeRobert Bosch GmbH
InventorNorbert Alaze
Life of this patent
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Abstract
A pump for a brake system in which the pump includes two pump pistons driven by a motor. Each pump piston feeds the brake fluid both during a retraction stroke and during an extension stroke, and a relatively uniform feed flow is thereby attainable by a fluid output from the piston being driven in both directions. The piston pump is intended for slip-controlled vehicle brake systems in motor vehicles.
Claims20
A slip-controlled vehicle brake system with a piston pump comprising at least one pump piston (40), drivable by a drive motor in a housing in a first direction of motion (76), wherein the pump piston (40) in its motion in the first direction of motion (76) reduces a size of a first work pressure chamber (50) in the housing, and upon a motion in a second direction of motion (78) opposite the first direction of motion (76) the pump piston (40) increases the size of the first work pressure chamber (50), the pump piston (40), in its motion in the first direction of motion (76), increases the size of a second work pressure chamber (52) in the housing (42), and upon its motion in the second direction of motion (78) the pump piston (40) reduces the size of the second work pressure chamber (52), wherein an inlet (22) to the first pressure chamber (50) is connected to a brake cylinder (FL) of a front brake of a vehicle, and an inlet (21) to the second pressure chamber (52) is connected to a brake cylinder (RR) of a rear brake of the vehicle.
Dependencies are inferred from the claim text.