A brake system includes first and second wheel brakes, a reservoir, and a brake pedal unit having a housing and a pair of output pistons slidably disposed in the housing. The output pistons generate brake actuating pressure during a manual push-through mode for actuating the first and second wheel brakes. The system further includes a plunger assembly having a housing having a motor driving an actuator, and a piston connected to the actuator. The piston pressurizes a chamber when the piston is moving in a first direction to provide fluid flow out of a first port and through a pair of parallel valves. The piston pressurizes a second chamber when the piston is moving in a second direction opposite the first direction to provide fluid flow out of a second port. The first and second ports are selectively in fluid communication with the wheel brakes.

A brake system includes first and second wheel brakes, a reservoir, and a brake pedal unit having a housing and a pair of output pistons slidably disposed in the housing. The output pistons generate brake actuating pressure during a manual push-through mode for actuating the first and second wheel brakes. The system further includes a plunger assembly having a housing having first and second ports, a motor driving an actuator, and a piston connected to the actuator. The piston pressurizes a first chamber when the piston is moving in a first direction to provide fluid flow out of the first port. The piston pressurizes a second chamber when the piston is moving in a second direction opposite the first direction to provide fluid flow out of the second port. The first and second ports are selectively in fluid communication with the wheel brakes.

A method for ascertaining information relating to a mechanically effective power of an active brake booster of a braking system of a vehicle, including: ascertaining a first piece of information relating to an assisting force that is effectuated with the aid of the operated active brake booster, ascertaining a second piece of information relating to a pressure force in a master brake cylinder of the braking system, situated downstream from the active brake booster, the pressure force acting counter to the operated active brake booster, ascertaining a third piece of information relating to a spring force of at least one spring of the active brake booster and/or of the braking system, the spring force acting counter to the operated active brake booster, and establishing the information relating to the mechanically effective power of the active brake booster, taking into consideration the first, second, and third pieces of information.

An electric brake system includes a hydraulic pressure control circuit configured to acquire a detected value from a hydraulic pressure detection portion configured to detect a hydraulic pressure in a master cylinder and control driving of an electric actuator in such a manner that a target hydraulic pressure corresponding to a braking instruction is generated in the master cylinder, a fluid amount control circuit configured to drive a fluid amount supply device disposed between the master cylinder and a wheel cylinder to control a fluid amount to supply to the wheel cylinder, and a storage circuit configured to store a fluid amount characteristic, which is a characteristic of the fluid amount with respect to the detected value. The fluid amount control circuit controls the fluid amount supply device based on the fluid amount characteristic stored in the storage circuit.

A brake system for a vehicle is provided to independently adjust a braking pressure of each wheel. The system includes a hydraulic pressure brake driven by two actuators and a sub-cylinder and valve configurations that are disposed in the peripheral flow path thereof to eliminate the pressure unbalance generated in the hydraulic pressure brake.

Disclosed herein is an electronic brake system. The electric brake system includes a pedal operator connected to a brake pedal and configured to transmit a braking intention to an electronic control unit; a reservoir configured to store a working fluid; a pressure supplier provided with a driver providing a power, and configured to generate a hydraulic pressure of a plurality of wheel brakes; and a braking pressure regulator configured to regulate a hydraulic pressure, which is generated by the pressure supplier and transmitted to the wheel brake, wherein the braking pressure regulator includes a first hydraulic circuit hydraulically connected to two wheel brakes and a second hydraulic circuit hydraulically connected to the other two wheel brakes, wherein the first hydraulic circuit and the second hydraulic circuit are provided with a plurality of inlet lines connecting the pressure supplier to each of the wheel brake, and a plurality of outlet lines connecting each of the wheel brake to the reservoir or connecting each of the wheel brake to the pedal operator, wherein the first hydraulic circuit and the second hydraulic circuit are hydraulically separated from each other to regulate a hydraulic pressure, which is transmitted to the wheel brake by the other hydraulic circuit when any one hydraulic circuit operates abnormally.

A brake device for a vehicle including: a master cylinder unit configured to generate hydraulic pressure by pressing of a pedal; a reservoir connected to the master cylinder unit and configured to store oil; a driving unit operated by movement of the pedal and configured to receive electric energy through a plurality of batteries to supply rotation power; a hydraulic generation unit configured to rotate by receiving the rotation power of the driving unit and generate hydraulic pressure by rotation of a plurality of rotors; wheel cylinder units configured to receive the hydraulic pressure generated by the hydraulic generation unit and constrain rotation of wheels; and a control unit configured to detect whether the driving unit normally operates and control an operation of the driving unit to supply the hydraulic generation unit with the rotation power in an event of abnormal operation of the driving unit.

An apparatus and a method to detect an offset of a motor position sensor. The apparatus includes a command voltage vector generation unit configured to, in a state in which a motor has been coupled to an electric booster braking system, generate a command voltage vector having a predefined command phase and command voltage and apply the command voltage vector to the motor such that a piston moves in a direction determined based on the current position of the piston, and an offset detection unit configured to detect the offset of the motor position sensor based on a phase difference between a command phase of the command voltage vector and an actually measured phase obtained by actually measuring, by the motor position sensor, a phase formed by rotors of the motor that are aligned as the command voltage vector is applied from the command voltage vector generation unit to the motor.

The present disclosure relates to an apparatus and a method for controlling a braking pressure of a powered booster brake system, the apparatus including a pedal stroke sensor configured to detect a manipulation degree of a brake pedal; an electronic control unit (ECU) configured to calculate a braking pressure using the detection result of the pedal stroke sensor; and a motor configured to move a piston inside a pump to perform a braking operation under control of the ECU, wherein the ECU determines a first position of the piston, which corresponds to the braking pressure, and controls the motor on the basis of a position of the piston.

A method for checking functionality of a motor vehicle braking system. The braking system has a main module, including: hydraulically actuatable wheel brakes, pairs being assigned to respective brake circuits; at least one electrically actuatable wheel valve per wheel brake sets wheel-specific brake pressures; a pressure provision device actively builds up pressure in the wheel brakes; a pressure-medium reservoir at atmospheric pressure, and an auxiliary module, which has for each of two wheel brakes: a pressure sensor for measuring pressure in a wheel brake line; an open when deenergized isolating valve in the wheel brake line; a pump. At least one variable is measured to assess functionality of the braking system. Using least one acceptance criterion, and checked whether the variable satisfies the acceptance criterion. Determining at least one variable representing the viscosity of the brake fluid, and the at least one acceptance criterion depends on a variable representing viscosity.