A brake system, including four hydraulically actuatable wheel brakes. Each wheel brake is assigned in each case one outlet valve which is closed when electrically deenergized. Each wheel brake is assigned in each case one inlet valve which is open when electrically deenergized. The brake system furthermore includes a simulator which is actuatable by a brake pedal, wherein two pressure provision devices are provided for actively building up pressure in the wheel brakes, two brake circuits are hydraulically formed, wherein, in each brake circuit, in each case one pressure provision device is hydraulically connected to two wheel brakes, and wherein two separate on-board electrical systems are provided, and wherein each pressure provision device is fed in each case by one of the two on-board electrical systems.

A highly reliable vehicle brake system that includes an electric brake and achieves redundancy at low cost is provided. A vehicle brake system (1) is provided to a wheel (Wa) of a vehicle (VB), and includes an electric brake (16a) provided with a motor (80), a driver (60) that drives the motor (80), and a first control device (10) provided with a master controller (30) and a first sub-controller (40) connected to each other. The electric brake (16a) is controllable by both the master controller (30) and the first sub-controller (40).

According to at least one embodiment, the present disclosure provides a control method of an electric hydraulic brake including an auxiliary braking system generating a braking force in a vehicle when a main brake system fails, the control method comprising: determining whether the main brake system fails; opening a rear-wheel High pressure Switching Valve (HSV) connecting a rear wheel of the main brake system and a Low Pressure Accumulator (LPA) of the auxiliary braking system when the main brake system is determined to have failed; determining whether a driver intervenes in braking; and controlling the auxiliary brake system to generate a braking force in the vehicle.

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.

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 controlling the braking action applicable by a brake caliper on a mechanical movement member of a vehicle is described. An electronic control unit operatively connected to an actuator assembly receives an input signal representative of a braking request. The unit determines a first reference value of a position of a component in the actuator assembly and a second reference value of a parameter representative of the braking action applicable by a brake caliper via the actuator assembly. The unit determines at least one feedback value of the position of a component in the actuator assembly. The unit also generates at least one control signal for the actuator assembly based on feedback values and the reference values.

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.

A brake device for a brake-by-wire system includes a brake pedal, a sensor, a reaction force generator, and a reaction force changing mechanism. The brake pedal is rotatably mounted on a housing and not mechanically connected to a hydraulic pressure generator. The sensor outputs a signal corresponding to a stroke amount of the brake pedal to an electronic control unit. The reaction force generator has one end connected to the brake pedal and the other end connected to the housing so as to generate a reaction force against a depression force applied to the brake pedal by a driver. The reaction force changing mechanism generates a reaction force against a depression force applied to the brake pedal by the driver, and is able to change a magnitude of the reaction force in advance according to the driver.