[Problem] The present invention relates to a hydraulic control unit that includes a pump for increasing a hydraulic pressure of a brake fluid.

[Means for Resolution] The hydraulic control unit according to the present invention includes: a discharge channel from which the brake fluid is discharged, the brake fluid being pressurized by the pump; a pulsation reducing unit disposed in the middle of the discharge channel; and a controller controlling the pump and the pulsation reducing unit. The pulsation reducing unit includes: a valve housing; a fixed core fixed to the valve housing; a movable core received in the valve housing in an axially movable manner; a closing member interlocking with the movable core and closing the discharge channel; a coil disposed in a manner to surround the valve housing and the fixed core; and an inflow chamber which is formed by the valve housing and one end surface of the movable core, into which the brake fluid from the discharge channel flows, and whose volume can vary.

A vehicle braking system includes a wheel cylinder, a master cylinder including a master cylinder piston operable to translate between an unactuated position and an actuated position in a first mode of operation, a brake pedal operable to transition between an extended position corresponding to the unactuated position of the master cylinder and a retracted position corresponding to the actuated position of the master cylinder, and a booster located between the master cylinder and the brake pedal. The master cylinder is operable to selectively transfer a braking force from the brake pedal to the wheel cylinder in the first mode of operation. The booster is operable to hold the brake pedal in the retracted position in a second mode of operation without user input and without associated braking.

A hydraulic motor vehicle brake system is specified with a device for generating a hydraulic fluid pressure. The device comprises an electrically controllable actuator and a piston in a pressure chamber, which is movable by means of the electrically controllable actuator for changing a hydraulic fluid pressure in the pressure chamber. The brake system also comprises a wheel brake pressure control device with a reservoir for the storage of hydraulic fluid discharged from a motor vehicle wheel brake in a pressure reduction phase, wherein the reservoir is fluidically coupled to the pressure chamber. A control system of the brake system is designed to output a control signal for the actuator in the event of a detected loss of function of the control device and in the event of a detected critical filling volume of the reservoir with hydraulic fluid during operation of the control device, which causes the piston to be driven back for pressure reduction in the pressure chamber with suction of hydraulic fluid from the reservoir.

A braking system for a vehicle including front and rear wheels having wheel brakes includes a fluid displacement mechanism for supplying brake fluid to at least one of the wheel brakes. The fluid displacement mechanism includes a piston having a first position prior to braking and a second position for applying braking. A fluid accumulator is in fluid communication with the fluid displacement mechanism and stores brake fluid. A valve is in fluid communication with the fluid displacement mechanism and the accumulator and is configured to be closed while the piston moves from the second position towards the first position to prevent depletion of the accumulator.

An electrically actuatable operating unit (106) for a motor vehicle brake comprises a housing body (122) which is arranged so as to be displaceable in a braking direction for operation of the motor vehicle brake, a recess (150) formed in the housing body (122), wherein the recess (150) is delimited at one longitudinal end by a contact shoulder (172), a through-opening (158) delimited by the contact shoulder (172), an operating member (124) which is arranged in the recess (150) so as to be displaceable for operation of the motor vehicle brake and projects through the through-opening (158) of the contact shoulder (172), wherein the operating member (124) can be arranged in a force-transmitting manner between a brake pedal and the motor vehicle brake (400). The operating unit (106) further comprises a return spring (126) which is arranged in the recess (150) and is configured to move the operating member (124) relative to the housing body (122) away from the contact shoulder (172), and a sleeve element (180) which circumferentially surrounds a portion of the operating member (124) at least partially and is held in contact with the contact shoulder (172) by the return spring (126), and wherein the sleeve element (180) projects into the through-opening (158) in such a manner that it is arranged between the operating member (124) and an inner circumferential surface of the contact shoulder (172) that delimits the through-opening (158).

[Problem] The present invention provides a brake hydraulic pressure controller capable of suppressing vibrations of the brake hydraulic pressure controller by lowering a position of center of gravity of the brake hydraulic pressure controller at the time of being mounted on a vehicle. [Means for Resolution] A brake hydraulic pressure controller for a four-wheeled motor vehicle that controls a hydraulic pressure of a brake hydraulic circuit includes: a housing; a motor mounted on a first surface of the housing; and plural electromagnetic control valves mounted on a second surface that opposes the first surface of the housing. The plural electromagnetic control valves are arranged in plural rows from a near side to a far side from a third surface that continues perpendicularly from both of the first surface and the second surface. Two circuit control valves and four booster regulators are arranged in the same row. The two circuit control valves are arranged in channels that connect piping ports, to which piping connected to a master cylinder is connected, and discharge sides of pumps driven by the motor. The four booster regulators are arranged in channels that connect the circuit control valves and piping ports, to which piping connected to wheel cylinders is connected.

A transportation vehicle with a brake system designed for rapid deceleration of a moving vehicle, which enhances the effectiveness of vehicular braking in emergency situations, and increases the safety of automobile traffic on roads, which results in greater road-traffic safety due to enhanced reliability and higher effectiveness of braking under emergency situations.

A vehicular hydraulic brake system having a master brake cylinder with a hydraulic reservoir supplying a brake fluid, a control foot pedal and a vacuum booster connected to an operating brake cylinder of each wheel. The brake system has emergency braking assemblies mounted before the operating brake cylinders of at least rear wheels. The emergency braking assembly includes an electric mechanism operating in a reciprocating manner and has a rod attached to a piston of a hydraulic cylinder. An inlet hole of the hydraulic cylinder is connected to a pipeline in communication with the master braking cylinder. An outlet hole of the hydraulic cylinder is in communication with the operating brake cylinder. A top portion of the hydraulic cylinder has a compensation port in the close proximity to the electric mechanism, said compensation port being connected to the pipeline in communication with the master braking cylinder. A bottom portion of the hydraulic cylinder of the emergency braking assembly is disposed not lower than a top level of the operating brake cylinder.

A braking apparatus for a vehicle and a method for controlling the same. The braking apparatus includes a master cylinder configured to form braking pressure based on an input to a brake pedal and transmit the braking pressure to a wheel brake side, a motor configured to control the pressure transmitted to the wheel brake side by moving a piston included in the master cylinder, and a controller configured to control the motor. The controller determines whether the piston reaches an end point of travel, based on a rate of change in a position of the piston and a current of the motor, and sets a displacement of the piston as a maximum displacement when it is determined that the piston has reached the end point and position initialization for the piston has been completed.

A braking system for a vehicle including front and rear wheels having wheel brakes includes a fluid displacement mechanism for supplying brake fluid to at least one of the wheel brakes. The fluid displacement mechanism includes a piston having a first position prior to braking and a second position for applying braking. A fluid accumulator is in fluid communication with the fluid displacement mechanism and stores brake fluid. A valve is in fluid communication with the fluid displacement mechanism and the accumulator and is configured to be closed while the piston moves from the second position towards the first position to prevent depletion of the accumulator.

An electric booster including: a motor; a booster body coupled to the motor; a bolt screw rotatably installed in the booster body, connected to the motor, and rotated by the motor; a buffer mounted in the booster body and made of a material different from the booster body; and a nut screw restricted from rotating by the buffer, and screwed to the bolt screw so as to be linearly moved in the longitudinal direction of the bolt screw.