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.

According to at least one embodiment, the present disclosure provides a brake system for a vehicle which includes a 3-way solenoid valve to reduce the number of solenoid valves mounted to the brake system.

A brake pedal is operated by a pedal force of a driver. A sensor is capable of detecting a stroke amount of the brake pedal. A brake circuit generates braking force to apply a brake to a vehicle by applying hydraulic pressure to wheel cylinders provided to respective wheels. An electronic control device controls the braking force generated by the brake circuit based on an output signal from the sensor and a state of the vehicle. The electronic control device executes predetermined braking force control under which the braking force generated by the brake circuit is set to be predetermined braking force, when the stroke amount of the brake pedal is between a first threshold and a second threshold larger than the first threshold.

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.

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 communication method between a brake booster of a vehicle and an ESP control unit of the vehicle. In the method, a signal is coupled into a brake fluid, transported between the brake booster and the brake control unit over a brake line filled with the brake fluid, and extracted again from the brake fluid.

In the case of this brake control device, for example, a drive control unit is capable of executing, in a switching manner, drive control of a motor based on an operation amount and drive control of the motor based on a stored value in a storage unit. The drive control unit continues the drive control of the motor based on the operation amount until the operation amount reaches a state satisfying a predetermined convergence condition while the drive control of the motor based on the operation amount is being executed. The storage unit stores a parameter value, which is obtained in the state in which the operation amount satisfies the predetermined convergence condition, into the storage unit as the stored value.

A method for checking the availability of a hydraulic fallback level in a power brake system with electronic slip control, an electronic control device, and a power brake system with electronic slip control. In normal operation, power brake systems perform braking procedures without a driver participating in building up braking pressure. A requirement for braking is detected by an electronic control device and associated with a braking pressure which is set by electrical control of the drive of a primary pressure generator. Power brake systems are often equipped with a secondary pressure generator, connected with the wheel brakes, in parallel with the primary pressure generator, which can be used to perform the building up of pressure at a hydraulic fallback level. For safety reasons, the availability of the hydraulic fallback level is checked at particular time intervals during normal braking operation of the power brake system.

A hydraulic motor vehicle brake system that is operable in a brake-by-wire mode and/or a push-through mode is disclosed. The brake system comprises: a pedal module having a master cylinder which, in the push-through mode, is actuatable by a driver by way of a pedal in order to generate a respective brake pressure at wheel brakes of the motor vehicle; and a functional module having at least one electrical brake pressure generator by which, in the brake-by-wire mode, a respective brake pressure can be generated at the wheel brakes. The pedal module and the functional module are arranged separately from one another and are couplable and/or coupled to one another via lines, such as fluid lines.