An electronic brake for a vehicle and a control method therefor according to an embodiment of the present disclosure are able to stably generate a required braking force by controlling an auxiliary brake device by an auxiliary controller, if a flow path on the auxiliary brake device that connects a main brake device and a wheel brake is unintentionally closed.

An electronic brake for a vehicle and a control method therefor according to an embodiment of the present disclosure are able to generate a braking force required to safely run the vehicle even if something is wrong with a main brake device, by controlling an auxiliary brake device, which generates a required braking force by serving as a backup for the main brake device.

The present disclosure provides a vehicle brake comprising: a reservoir configured to store a fluid therein; a hydraulic circuit configured to transfer a hydraulic pressure to a wheel of a vehicle; a plurality of valves disposed to regulate a flow of the fluid in the hydraulic circuit; and a master cylinder including a cylinder body, a main piston which is movably disposed within the cylinder body and in which a receptacle is formed at one side thereof, and a center piston which is disposed within the cylinder body and in which a penetration hole is formed in at least a part thereof, wherein the penetration hole is formed to have a size smaller than a cross-sectional area of the receptacle, and as the main piston moves, at least a part of the center piston is inserted into the receptacle, and thus a pressurizing area of the main piston decreases.

A motor vehicle brake system includes a master brake cylinder actuatable by a brake pedal and having only one pressure chamber; an electrically controllable pressure supply device; a pressure medium reservoir, under atmospheric pressure from which the master brake cylinder and the pressure supply device are supplied with pressure medium; and at least two hydraulically actuatable wheel brakes. The wheel brakes can be actuated by the master brake cylinder or by the pressure supply device. The pressure chamber of the master brake cylinder is separably connected via an isolating valve to a first brake circuit supply line. The wheel brakes are divided into at least two wheel brake groups. The first wheel brake group connected to the first brake circuit supply line, and the pressure supply device connected to a second brake circuit supply line to which the second wheel brake group is connected.

A method for operating a motor vehicle. The motor vehicle includes a first actuating element, an actuatable second actuating element, and a braking system including an activatable braking force generator and a master brake cylinder, at least one hydraulic piston displaceably mounted in the master brake cylinder and is steplessly displaceable between first and second end positions. A first deceleration value is predefined for the motor vehicle when the instantaneous position of the piston falls short of a change position between the first and second ends. The braking force generator, when the first deceleration value is predefined, is activated in such a way that the hydraulic piston is displaced as a function of a level of the first deceleration value. The first deceleration value is decreased upon detection of the actuation of the second actuating element by the driver.

A method of removing foreign objects from a brake device includes determining whether starting power is turned off in a state in which leakage of a hydraulic circuit is confirmed; and operating, while the starting power is turned off, a main master cylinder using standby power, and performing a foreign object removal mode in which hydraulic pressure is applied to a plurality of hydraulic regulating valves in the hydraulic circuit and released.

A device for a hydraulic actuating system, e.g., a motor vehicle brake, a clutch or a gear selector, may include the following components arranged in one housing, forming a main module: at least one pressure supply device driven by an electric motor drive, and a valve arrangement comprising at least one solenoid valve. The device may further include an electrical control unit (ECU) and valve output stages and sensors. The main module may be electrically and/or hydraulically connected to at least one further system component, which system component may include and actuating device and a travel simulator.

The invention relates to a valve arrangement (10) comprising valves and coil arrangements (20), each coil arrangement (20) having two coils (110, 210) which are electrically connected to separate control units (100, 200). Each valve can be independently actuated by either the first coil (110) or the second coil (210) of the coil arrangement (20) associated therewith. The invention further relates to a brake system (400, 500) having such a valve arrangement (10).

A brake system for vehicles, comprising hydraulically actuatable wheel brakes, a first electrohydraulic brake control device, having an associated pressure-medium. The first brake control device comprises a first pressure-providing device for supplying the wheel brakes. An inlet valve and an outlet valve for setting wheel-specific brake pressures, and a wheel-specific output pressure connection connected to the pressure-medium reservoir by the outlet valves. A second electrohydraulic brake control device, comprises a second pressure-providing device with a first pump having a suction side and a pressure side for supplying a first wheel brake of the wheel brakes. The second brake control device is connected downstream of the first brake control device and the suction side of the first pump is connected to a first of the output pressure connections of the first brake control device. A check valve is connected in parallel with the outlet valve of the first output pressure connection.

An electric brake apparatus of the present invention relates to an electronic brake apparatus that includes a pump unit driven based on driving of a motor and a plurality of wheel cylinders each of which receives a fluid pressure generated by the pump unit. The electric brake apparatus includes: a hydraulic circuit disposed between the pump unit and the wheel cylinders; a plurality of wheel valves that regulate a fluid flow between the hydraulic circuit and the wheel cylinders; and an electronic control unit that controls the wheel valves and the motor, wherein the electronic control unit controls the wheel valves and the motor on the basis of an input of a driver's pedaling of a brake pedal and a need for electronic stability control.