A diagnostic method, in particular to determine the leak tightness of at least one seal and/or one valve, for at least one component of a vehicle, wherein a piston cylinder unit, whose piston is driven by an electromotive drive, forms a pressure supply unit, wherein a control unit identifies the piston position and/or piston movement of the piston by means of at least one sensor and the pressure generated by the pressure supply unit or the motor current flowing through the drive by means of at least one sensor. During the diagnostic method, the control unit may be used to measure quantities relating to piston movement/position, pressure, and/or pressure variation.

A method for checking intended pressure medium-conducting contacting of circuit branches, associated with one another, of separate brake circuits of an electronically slip-controllable power brake system with two actuator units, contacted for conducting pressure medium, for generating and controlling brake pressure, in particular for a motor vehicle, and an electronic control unit for such a power brake system.

A method for haptic feedback on a brake pedal of a motor vehicle. A current stability index describing the current driving situation is compared to a stored critical stability index. A haptic feedback is imprinted on the brake pedal of the motor vehicle when the ratio between the current stability index and the critical stability index exceeds a previously defined limit value.

An electronically slip-controllable power-assisted braking system for a motor vehicle. The power-assisted braking system is equipped with a hydraulically acting booster device that is inserted in a brake circuit downstream from an actuation device and has a piston unit movably guided in a cylinder housing. The piston unit is embodied in stepped fashion and divides an interior space of the cylinder housing into multiple booster chambers impinged upon by pressure medium. At least one of these booster chambers is capable of being impinged upon by pump pressure from a pump driven by external force.

A master cylinder and an electronic brake system including the same are disclosed. The master cylinder includes a cylinder body connected to a reservoir and provided with a bore, one end of which is opened in a longitudinal direction, a piston configured to be movable forward and backward within the bore, and at least one master chamber configured to discharge a master chamber in response to a displacement of the piston. The master cylinder includes a pedal simulator provided in the bore. The pedal simulator is spaced apart from the piston by a predetermined distance, is directly pressurized by a brake pedal, and thus provides reaction force. The simulation chamber is formed in the bore, and is separated from the master chamber by the pedal simulator. The simulation passage connects the simulation chamber to the master chamber. The simulation valve is provided in the simulation passage, and controls flow of a pressing medium in response to an opening/closing operation thereof.

A method for operating a hydraulic braking system of a motor vehicle, including at least one hydraulically actuatable wheel brake, a brake pedal unit including an actuatable brake pedal for predefining a setpoint braking torque, and a pressure generator which is electrically actuated in order to generate a hydraulic pressure as a function of the setpoint braking torque, an electrical operating current of the pressure generator being limited to a first predefinable limiting value during normal operation. The brake pedal unit is monitored for the nature of actuation of the brake pedal, and the limitation of the operating current is canceled if highly dynamic actuation of the brake pedal is detected.

A brake device may include: a master cylinder including a master piston moved in connection with a pedal, and a master cylinder body having the master piston movably inserted therein and containing fluid of which hydraulic pressure is varied when the master piston is moved; a pedal force generation part housed in the master cylinder body, and restricting a motion of the master piston while interfering with the master piston depending on the motion of the master piston; a braking actuator configured to generate hydraulic pressure; an actuator connection part connecting the braking actuator to a brake mounted on a wheel; and a master connection part connecting the master cylinder to the actuator connection part.

A braking system for a vehicle includes: a front axle wheel brake cylinder; a rear axle wheel brake cylinder; and a control electronics system for controlling a first brake pressure in the front axle wheel brake cylinder and/or a second brake pressure in the rear axle wheel brake cylinder. A limiting value z-critical is defined for the braking system, which specifies a maximum braking action, at which a traction stress on the front axle of the vehicle and a traction stress on the rear axle of the vehicle are equal. The braking system is mechanically configured for a z-critical of at least 0.7 g, and the braking system is controlled by the control electronics system during operation using a z-critical value of at most 0.7 g.

An electronic control brake system for a vehicle, comprising: a pressure sensor connected to an electronic control device for electrically controlling a brake hydraulic pressure and sensing the brake hydraulic pressure generated in a master cylinder, the electronic control device includes a PCB separated from the pressure sensor, and an elastic connecting body of a conductive material provided on the PCB, the pressure sensor includes a sensor housing, a sensing portion provided inside the sensor housing for sensing the brake hydraulic pressure, and a lead portion of inelastic and conductive material and having a first end electrically connected to the sensing portion while passing through the sensor housing and a second end exposed to the outside and electrically connected to the electronic control device.

Provided are an electronic brake system and a method of controlling the same. The electronic brake system includes a pedal input unit configured to receive a pedal force according to a driver's braking intention, an estimating unit configured to estimate a temperature and a friction coefficient of a brake disk pad, and a control unit configured to correct a braking target pressure according to the driver's braking intention on the basis of the estimated temperature and friction coefficient of the brake disk pad.