Disclosed is a hydraulic control apparatus of a brake system including a modulator block having a motor bore, and a motor including a cover that covers an opening of a case accommodating a stator and a rotor and is supported on one side of the modulator block, wherein a vent hole for air flow between the inside and the outside of the motor is formed on the cover and a communication passage for communicating the motor bore and the vent hole is formed in the modulator block.

A piston pump for pumping a pressure medium in an electronically slip-controllable vehicle brake system includes a pressure-medium control valve configured to control a throughflow direction in a pressure medium circuit. The pressure-medium control valve has a valve housing, a valve seat, and a valve-closing body that is received in the valve housing in an axially movable and radially guided manner. The valve-closing body is configured to control the valve seat according to the prevailing pressure ratios upstream and downstream of the valve seat. The valve seat is configured as a single component with the valve housing. The pressure-medium control valve is produced by forming in a compact and cost-effective manner. The pressure-medium control valve operates quietly and is configured to be used alternatively as an independent unit that is configured to be tested prior to use.

An electrohydraulic actuator assembly for use in a brake-by-wire hydraulic brake system. The electrohydraulic actuator assembly includes a pair of electrohydraulic actuator EHA units. One EHA unit provides fluid to front brakes and the other EHA unit provides fluid to rear brakes. Each EHA unit includes an electric motor, a reduction gear unit, a pair of magnetorheological clutches, and a pair of fluid pumps. The system further including an ECU that actuates the electric motor and controls engagement of the clutches to cause the fluid pump to pump brake fluid to at least one of the front and rear brakes. The system further includes a regeneration system for providing supplemental electricity to the electric motors.

An electro-hydraulic control unit for a vehicle brake system includes a hydraulic control unit including an HCU block defining a motor bore containing an electric motor and an eccentric chamber containing a rotating eccentric driven by the electric motor. The HCU block also defines a pump bore containing a piston pump including a piston rod having a generally cylindrical shape with a smooth exterior surface extending substantially its entire length. An end cap is press fit around an end of the piston rod and includes a flange portion extending annularly outwardly for engaging a return spring. A piston guide includes a tubular portion guiding the piston rod and a shoulder for engaging the return spring. A throat of the piston guide holds a gland seal surrounding the piston rod. An outlet valve housing includes a tubular protrusion extending into the throat of the piston guide to hold the gland seal.

According to at least one embodiment, the present disclosure provides a pump system for a brake system, comprising: an oil reservoir; a pump housing having a suction port and a discharge port formed therein; a motor disposed at a side of the pump housing; an electronic control unit disposed at another side of the pump housing; a pump installed in the pump housing and having a suction channel, which is connected with the suction port, and a discharge port, which is connected with the discharge port, therein; a shaft coupled to the motor to rotate and having a rotating body configured to operate the pump; and a pump-reservoir pipeline configured to connect the suction channel to the oil reservoir.

A brake system for a vehicle is disclosed herein, which is constructed for selective pressurisation and pressure relief of at least two pressure connections for brake actuators. The brake system comprises an electrofluidic pressure generation unit, a main cylinder unit and an electrofluidic pressure increase unit, which is fluidly coupled at the input side to the electrofluidic pressure generation unit and/or the main cylinder unit in such a manner that exclusively a volume flow of pressure fluid which is pressurised by the electrofluidic pressure generation unit and/or the main cylinder unit can be acted on with a supplementary pressure by the pressure increase unit. At the output side, the pressure increase unit is connected in fluid terms to one of the pressure connections. In addition, a method for operating such a brake system is set out.

Provided is a support structure for a plurality of electrically actuated brake fluid pressure generation devices provided in a vehicle in which automated driving is enabled, the brake fluid pressure generation devices being configured to generate brake fluid pressure. The support structure includes a support member (a first bracket, a second bracket, and an actuator bracket) via which a brake actuator and a brake unit are supported by frame members forming a storage chamber separated from a vehicle cabin. The support member is supported by the frame members at two points. The brake actuator and the brake unit are mechanically connected to each other via the support member.

To acquire a hydraulic pressure control unit and a straddle-type vehicle brake system capable of adding an auxiliary plunger pump while suppressing extreme enlargement of the hydraulic pressure control unit. In a base body, a combination of a first plunger pump and a first accumulator and a combination of a second plunger pump and a second accumulator for a different system of a hydraulic circuit therefrom are separately provided on both sides of a reference surface including a center axis of a motor hole. A first plunger pump hole and a second plunger pump hole are separately provided on a second surface and a third surface constituting both ends of the base body in a first direction. A first accumulator hole, a second accumulator hole, and an auxiliary plunger pump hole are provided on a fourth surface constituting an end of the base body in a second direction.

A piston pump assembly of an electronic controlled brake device for a vehicle includes: an inlet housing configured to accommodate a reciprocating piston and elastically support the piston; an outlet housing configured to accommodate the inlet housing and form a working chamber that allows a working fluid to be introduced from the inlet housing; an outlet ball valve accommodated in the working chamber to open and close a flow passage of the working fluid that is introduced from the inlet housing to the outlet housing; an outlet spring accommodated in the working chamber to elastically support the outlet ball valve toward the inlet housing; and a damper accommodated in the working chamber and mounted within the outlet spring to allow shape deformation while contacting the outlet ball valve. When the outlet ball valve is pushed and pressed toward an end of the working chamber, the damper generates viscous damping while discharging the accommodated working fluid into the working chamber. Accordingly, it is possible to actively reduce noise or vibration upon initial operation of the electronic controlled brake device or in a low frequency section, thereby improving ride comfort.

In a hydraulic unit, which is for a hydraulic brake system, that has a hydraulic block and at least one valve device, the valve device includes a hydraulic cartridge with a valve seat and with a movable closing body for blocking and opening the valve seat, and a magnet assembly with a magnet coil for generating a magnetic force for moving the closing body. The magnet assembly is integrated into the hydraulic block, and the valve device has a permanent magnet in order to assist the movement of the closing body by means of magnetic force.