A brake installation for a motor vehicle. First and second pressure provision devices build up brake pressure in the wheel brakes. The first pressure device connected to a first wheel brake of a first brake circuit and to a second wheel brake of the first brake circuit. The second pressure device connected to a third wheel brake of a second brake circuit and to a fourth wheel brake of the second brake circuit. Each pressure device is respectively activated by an open-loop/closed-loop control unit. A first hydraulic line, with a normally open isolating valve, connects the first wheel brake line of the first brake circuit to the first wheel brake line of the second brake circuit. A second hydraulic line, with a normally open isolating valve, connects the second wheel brake line of the first brake circuit to the second wheel brake line of the second brake circuit.

A hydraulic brake for a motor vehicle in which one inlet valve and one outlet valve, configured in the switchable fashion, is respectively made available for at least one wheel, wherein the inlet valve is fluidly coupled to the outlet valve downstream of the inlet valve via a brake pressure line, and wherein a hydraulic accumulator for storing hydraulic fluid is made available downstream of the outlet valve. The hydraulic accumulator is reaction-free in a recuperative braking mode. The brake pressure line is coupled to a piston of a brake lining of a friction brake of the wheel via a valve arrangement, wherein the valve arrangement has a first valve which opens only towards the piston, and a second valve which opens only towards the brake pressure line, and wherein an opening pressure of the first valve is higher than a residual pressure brought about by the hydraulic accumulator.

An electronically pressure-controllable braking system and methods for controlling an electronically pressure-controllable braking system. Each wheel brake of the braking system is connected respectively to at least two brake circuits, pump units and valve devices of one brake circuit are operable respectively independently of the pump units and the valve devices of the respective other brake circuit. This provides a cost-effectively and compactly designed redundant braking system, which is suitable for use in autonomously, i.e., driverlessly drivable, motor vehicles.

Methods and apparatus to control vehicle braking systems are described herein. An example apparatus a first brake boost unit to control a first brake fluid pressure of a first brake system associated with front wheels of a vehicle, and a second brake boost unit to control a second brake fluid pressure of a second brake system associated with rear wheels of the vehicle.

A brake system for a motor vehicle has at least a first wheel brake and at least a second wheel brake. A first inlet valve is fluidically connected, on the one hand, to the first wheel brake, and, on the other hand, to a brake pressure source, and a second inlet valve is fluidically connected, on the one hand, to the second wheel brake, and, on the other hand, to the brake pressure source. In this case, a switching valve is provided, which fluidically connects the one fluid outlet of the second inlet valve in a first switching position to the second wheel brake and in a second switching position to the first wheel brake.

An electric brake system is disclosed. The electric brake system includes a master cylinder configured to discharge oil according to a pedal effort of a brake pedal, a simulation device provided with a simulator valve provided at a flow path connecting a simulation chamber, which is connected to the master cylinder to accommodate oil therein, to a first reservoir for storing oil therein so as to provide a reaction force according to the pedal effort of the brake pedal, and an inspection valve provided at a flow path connecting the first reservoir to the master cylinder or at a flow path connecting the master cylinder to the simulation device.

A brake system for vehicles, in particular motor vehicles, including a master brake cylinder, in particular a tandem master brake cylinder, a brake booster which is connected upstream of the master brake cylinder, in particular at least four hydraulically actuatable wheel brakes, and a first electrohydraulic brake control device which includes a first pressure regulating valve arrangement for adjusting wheel-specific brake pressures, in particular an electrically actuatable pressure source, and a wheel-specific outlet pressure connection for each wheel brake, wherein the brake booster is designed to be electrically actuatable, and a second electrohydraulic brake control device is provided which includes a second pressure regulating valve arrangement, in particular for adjusting wheel-specific brake pressures, and which is connected in series between the first brake control device and the wheel brakes.

A brake system for hydraulically actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a master cylinder fluidly connected to the reservoir and operable to provide a brake signal. A first power transmission unit is in fluid communication with the reservoir, a selected one of the rear wheel brakes, and a first fluid separator corresponding to a selected one of the front wheel brakes. A first electronic control unit is configured to control the first power transmission unit. A second power transmission unit is in fluid communication with the reservoir, the other one of the front wheel brakes, and a second fluid separator corresponding to an other one of the front wheel brakes. A second electronic control unit is configured to control the second power transmission unit.

An electronically slip-controllable braking system including an actuatable master brake cylinder, to which at least one wheel brake, associated with a wheel of a front axle and at least one wheel brake, associated with a wheel of a rear axle of a vehicle, are connected. An electronically activatable first actuator system sets and regulates brake pressures different from one another in the wheel brakes as a function of the particular present slip conditions. An electronically activatable second actuator system effectuates the setting and regulating of a uniform brake pressure at the wheel brakes and a third actuator system limits the brake pressure generated by the second actuator system at the wheel brakes associated with the wheels of the rear axle. The third actuator system controls a second pressure medium connection between the associated wheel brake of the rear axle and a pressure medium storage container.

An electric brake system is disclosed. The electric brake system comprises a hydraulic pressure supply device configured to generate hydraulic pressure using a hydraulic piston which is activated by means of an electrical signal that is output corresponding to a displacement of a brake pedal, and including a cylinder block, first and second hydraulic pistons movably accommodated inside the cylinder block, and first and second pressure chambers comparted by the first and second hydraulic pistons, a first hydraulic circuit configured to connect a first hydraulic flow path communicating with the first pressure chamber to one or more wheel cylinders, a second hydraulic circuit configured to connect a second hydraulic flow path communicating with the second pressure chamber to one or more wheel cylinders, and a balance valve configured to open and close a balance flow path connecting the first hydraulic flow path to the second hydraulic flow path.