An electro-hydraulic motor vehicle brake system is provided, having a first cylinder-piston device, which can be fluidically coupled to at least one wheel brake of the brake system, for generating hydraulic pressure on the at least one wheel brake, wherein the first cylinder-piston device comprises at least one first piston. The brake system further has a second cylinder-piston device, which comprises at least one second piston, and an electromechanical actuator which acts on the second piston of the second cylinder-piston device. The second cylinder-piston device is or can be fluidically coupled at the output side to the first piston of the first cylinder-piston device in order to provide a hydraulic pressure, which is generated in the second cylinder-piston device upon actuation of the electromechanical actuator, for actuating the at least one first piston of the first cylinder-piston device.

An operating device for a vehicle brake system may include a control device and a piston-cylinder unit, at least one chamber of which may be connected to at least one wheel brake via at least one hydraulic line and a valve device that has at least normally open inlet valves or switching valves. The device may further include a pressure source that may be controlled to supply pressure medium to the at least one hydraulic line or to the at least one wheel brake. The control device may control pressure build-up via volume control and/or time control, using inlet valves. The interior or armature chamber of an inlet valve may be connected to a corresponding brake circuit via a hydraulic line, and a valve seat outlet may be connected to a corresponding wheel brake via a hydraulic line.

Brake actuators for a motor vehicle braking system, braking systems including the brake actuators, and motor vehicles including the brake actuators are provided. A brake actuator includes a chamber enclosing a volume configured to hold a quantity of brake fluid, a piston, a piston actuator, and a compressible medium. The piston actuator may be coupled to the piston and configured to actuate the piston. The compressible medium may be positioned relative to the chamber such that the compressible medium is subjected to a force due to pressurization of the brake fluid in the chamber. A volume of the compressible medium may be configured to be changed by the force due to the pressurization of the brake fluid.

A brake pedal system for a motor vehicle includes a bracket, a pedal arm pivotally coupled to the bracket at a pivot point, and a first, second and third systems. The first system is arranged for simulating a pedal feel, the second system for sensing a pedal angle to electronically control a braking force by sending a first signal to a vehicle ECU and the third system is arranged for sensing at least a pedal force to electronically control a braking force by sending a second signal to a vehicle ECU. The second or the third system may be used as a master system for the braking control and the other as a slave, for achieving double security, and the first system together with the third system may be used to define the pedal feel.

A brake system for selectively actuating at least one of a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a master cylinder. A power transmission unit is configured for selectively providing pressurized hydraulic fluid. A pair of rear brake motors selectively electrically actuate rear parking brakes. An electronic control unit controls at least one of the power transmission unit and the pair of rear brake motors. A normally-closed DAP valve is located hydraulically between the power transmission unit and at least one of a two-position three-way valve and at least the selected one of the pairs of wheel brakes. An isolation valve and a dump valve are associated with each wheel brake.

A simulation device for an electrically controlled braking apparatus of a vehicle with an electric motor having a motorized axis slant in relation to the translation axis of the strut of the pedal group, a contrast body connected to the strut, a main abutment wall and an elastic contrast element, disposed between the main abutment wall and the contrast body. The method of applying the contrast action to the pedal provides for activating, when the flattening action of the pedal by the user is terminated, the motor to achieve an inactive configuration in which the useful distance of maximum compression of the elastic contrast element is minimal.

Provided is a vehicular brake apparatus capable of suppressing the occurrence of pedal shock. In this vehicular brake apparatus, a master cylinder forms a second hydraulic chamber neighboring to a first hydraulic chamber through a seal member. The seal member is arranged at a position facing the first hydraulic chamber and the second hydraulic chamber to be movable in the axial direction relative to the master cylinder. A first hydraulic pressure generating portion executes a movement restriction hydraulic pressure control such that when the operation information obtained by the operation information obtaining portion indicates that the brake operating member is not operated, the first hydraulic pressure which is higher than the second hydraulic pressure is generated in advance and consecutively, the larger a value relating to an operating amount in the operation information obtained by the operation information obtaining portion, the higher the first hydraulic pressure is generated.

An object of the present invention is to provide a hydraulic control apparatus capable of further effectively preventing or reducing a vibration. A second unit includes a housing including fluid passages and the like provided therein and configured to be mounted on a vehicle, a rotational driving shaft provided inside the housing, and a plurality of pump portions configured to be activated by a rotation of the rotational driving shaft and disposed in a direction around a central axis of the rotational driving shaft inside the housing. The pump portions are provided in such a manner that the number of pump portions positioned on a vertically lower side is larger than the number of pump portions positioned on a vertically upper side with respect to the central axis of the rotational driving shaft with the housing mounted on the vehicle.

A brake pedal emulator extends and connects between a support structure and a brake pedal pivotally engaged to the support structure at an axis. The brake pedal emulator includes a rotational damping device operatively connected to the brake pedal for driven rotation as the brake pedal moves about the axis.

Disclosed herein are an electronic brake system and a control method thereof. The electronic brake system includes a master cylinder connected to a reservoir storing oil, including a master chamber and a master piston provided at the master chamber, and configured to discharge the oil according to pedal effort of a brake pedal, a sensor configured to measure a displacement of the brake pedal, a pedal simulator configured to provide a reaction force according to pedal effort of the brake pedal and including a simulator chamber connected to the master cylinder to accommodate the oil, a hydraulic actuator provided between the master cylinder and a wheel cylinder and configured to control a hydraulic pressure flow delivered to the wheel cylinder, a first hydraulic pressure supply device operated by an electrical signal which is output by corresponding to the displacement of the brake pedal, and configured to supply a hydraulic pressure to the hydraulic actuator, and a second hydraulic pressure supply device provided between the reservoir and the master cylinder and configured to provide a vibration pedal feel to the brake pedal.