Patent ID: 9308905
Filing Date: 2016-04-12
CPC Classification: B60T

Claim Text:
1. A brake system for motor vehicles, which brake system can be actuated in a brake-by-wire operating mode both by the vehicle driver and independently of the vehicle driver, and is preferably operated in the brake-by-wire operating mode, and can be operated in at least one fallback operating mode, the brake system comprising; a brake master cylinder with a housing and two pistons which delimit two pressure spaces in the housing, the pressure spaces each assigned to one of two brake circuits, each of the two brake circuits having associated wheel brakes, a pressure medium storage vessel for storing a pressure medium with at least two chambers which are assigned to the two brake circuits, a brake pedal which is coupled to the brake master cylinder for actuating the brake master cylinder, an electrically operable normally open, separating valve assigned to each of the two brake circuits for separating each corresponding brake circuit into two sections including a first section, the first section being connected to an inlet connector of the separating valve and being connected to the brake master cylinder, and a second section, the second section being connected to an outlet connector of the separating valve and being connected to an inlet valve of each of the wheel brakes associated with the corresponding brake circuit, a first electrically controllable pressure provision device in the form of a cylinder and a piston arrangement, the piston actuated by an electromechanical actuator, a simulation device hydraulically connectable by means of an electrically actuatable simulator release valve to at least one of the pressure spaces of the brake master cylinder, wherein the simulation device imparts a haptic brake pedal feeling to the vehicle driver in the brake-by-wire operating mode, a first electronic control and regulating unit for actuating the first pressure provision device, the separating valves, and the simulator release valve, and a second electrically controllable pressure provision device having a suction connector and a pressure connector for each of the two brake circuits, the pressure connector being connected to the inlet connector of the separating valve which is assigned to the brake circuit corresponding to the pressure connector.