Brake system
AssigneeIpgate AG
InventorsHeinz Leiber, Anton Van Zanten, Thomas Leiber
Life of this patent
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Abstract
A brake system may include an actuating device, in particular a brake pedal; a first piston-cylinder unit having two pistons subjecting the brake circuits to a pressure medium via a valve device, wherein one of the pistons can be actuated by the actuation device; a second piston-cylinder unit having an electric motor drive, a transmission at least one piston to supply at least one of the brake circuits with a pressure medium via a valve device; and a motor pump unit with a valve device to supply the brake circuits with a pressure medium. The brake system may also include a hydraulic travel simulator with a pressure or working chamber which is connected to the first piston-cylinder unit.
Claims21
A brake system, comprising:
- an actuating device,
- a first piston-cylinder unit with at least one piston, comprising an auxiliary piston, in order to apply pressure medium to brake circuits, comprising a first and a second brake circuit, via a first valve device, wherein the auxiliary piston is arranged to be actuated by means of the actuating device,
- a second piston-cylinder unit with an electromotive drive, a transmission and at least one piston for supplying pressure medium to at least one of the brake circuits via a second valve device, and
- a motor-pump unit, with a third valve device, to supply pressure medium to the brake circuits, and
- wherein one or both of the following are true:
- (a) a hydraulic travel simulator is connected to a pressure chamber or working chamber of the first piston-cylinder unit, wherein the second piston-cylinder unit is only effective in a specific pressure range, wherein the motor-pump unit is used for pressure generation for a further, higher pressure range than the specific pressure range,
- (b) the brake system is designed for a replenishment of volume from a reservoir during a return travel of the piston of the second piston-cylinder unit via a suction valve, wherein the suction valve is connected to the reservoir via a return line.
Dependencies are inferred from the claim text.