A hydraulic pressure control unit capable of suppressing application of an external force thereto in comparison with the related art at the time when mounted to a straddle-type vehicle is obtained.

A hydraulic pressure control unit (1) includes: a base body (10) formed with an internal channel through which a brake fluid flows; and a housing (40) that is connected to the base body (10) and accommodates a circuit board. A dimension in a width direction (Y) of the housing (40) is greater than a dimension in the width direction (Y) of the base body (10). In a state where the hydraulic pressure control unit (1) is seen in a connection direction (X), a center in the width direction (Y) of the base body (10) is located on a first side surface (45) side from a center in the width direction (Y) of the housing (40).

A braking control device includes an “electrically driven pressure control unit YC”, “front-wheel and rear-wheel supply paths HKf and HKr that supply a brake fluid BF pressurized by the pressure control unit YC to front-wheel and rear-wheel wheel cylinders CWf and CWr”, “front-wheel and rear-wheel supply valves VKf and VKr provided in the front-wheel and rear-wheel supply paths HKf and HKr”, and a “controller ECU that drives the pressure control unit YC and the front-wheel and rear-wheel supply valves VKf and VKr”. In the braking control device, at least one of the front-wheel and rear-wheel supply valves VKf and VKr is a linear valve.

A brake system for a motor vehicle with at least four hydraulically activated wheel brakes. Each of the wheel brakes has a first electrically activated wheel valve which is open when de-energized and a second electrically activated wheel valve which is closed when de-energized, a first electrically activated pressure source, connected to the first wheel valves via a first brake supply line. Arranged in the first brake supply line is an electrically activated circuit isolating valve by which two of the first wheel valves can be hydraulically disconnected from the first pressure source, a second electrically activated pressure source, and a pressure medium reservoir vessel at atmospheric pressure. The circuit isolating valve is designed to be open when de-energized, and the second electrically activated pressure source is connected to the second wheel valves via a second brake supply line. A method for operating the brake system is also disclosed.

Disclosed is to an electronic brake system. The electronic brake system includes an integrated master cylinder having a simulation chamber, a first master chamber, and a second master chamber arranged in order from a side of a brake pedal, wherein the integrated master cylinder includes a simulation piston provided to be displaceable by the brake pedal to pressurize the simulation chamber, a first master piston configured to pressurize the first master chamber and having a diameter smaller than a diameter of the simulation piston, a second master piston configured to pressurize the second master chamber and having a diameter smaller than a diameter of the first master piston, and an elastic member interposed between the simulation piston and the first master piston to provide the brake pedal with a reaction force.

Disclosed herein an electronic brake system includes a hydraulic pressure supply device including a first pressure chamber and a second pressure chamber partitioned by a hydraulic piston, and a hydraulic control unit, wherein the hydraulic control unit comprises a first hydraulic flow path connecting the first pressure chamber and one of the first and second hydraulic circuits, a second hydraulic flow path branched from the first hydraulic flow path to connect to the other one of the first and second hydraulic circuits, a third hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the second hydraulic flow path to connect the second pressure chamber, and a fourth hydraulic flow path branched from the first hydraulic flow path on upstream side of a branch point of the third hydraulic flow path to connect the third hydraulic flow path.

Provided is an electronic brake system including: a reservoir in which a pressurized medium is stored; an integrated master cylinder including a simulation chamber, a simulation piston provided in the simulation chamber to be displaceable by a brake pedal, a master chamber, a master piston provided in the master chamber to be displaceable by a displacement of the simulation piton or a hydraulic pressure of the simulation chamber, an elastic member provided between the simulation piston and the master piston, a piston spring elastically supporting the master piston, a simulation flow path connecting the simulation chamber to the reservoir, and a simulator valve provided in the simulation flow path to control a flow of a pressurized medium; a hydraulic pressure providing unit provided to generate a hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to a displacement of the brake pedal; a hydraulic pressure control unit including a first hydraulic circuit provided to control the hydraulic pressure to be transferred to two wheel cylinders, and a second hydraulic circuit provided to control the hydraulic pressure to be transferred to other two wheel cylinders; an electronic control unit configured to control valves based on hydraulic pressure information and displacement information of the brake pedal; a backup flow path connecting the simulation chamber to the first hydraulic circuit; an auxiliary backup flow path connecting the master chamber to the backup flow path; and an inspection valve provided in the auxiliary backup flow path to control a flow of the pressurized medium.

A 3-way solenoid valve and a brake system for vehicle including same. The 3-way solenoid valve includes a valve chamber, valve block, a first operation assembly, a valve seat, and a second operation assembly.

A hydraulic block of an electronic braking device for vehicles, includes: a first input port for receiving brake oil from a master cylinder; a first output port for discharging the brake oil to a wheel brake; a first inlet valve port for accommodating a first inlet valve disposed on a first inlet flow path connecting the first input port to the first output port; and a first outlet valve port for accommodating a first outlet valve disposed on a first outlet flow path configured to depressurize the brake oil. The first outlet flow path is configured to pressurize the first outlet valve in an axial direction of a first plunger mounted inside the first outlet valve and to deliver the brake oil to the first outlet valve.

A brake system for actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a deceleration signal transmitter. First and second power transmission units are configured for selectively providing pressurized hydraulic fluid during a braking event. The first power transmission unit actuates a selected one of the front wheel brakes and a selected one of the rear wheel brakes. The second power transmission unit actuates the other one of the front wheel brakes and the other one of the rear wheel brakes. First and second electronic control units control the first and second power transmission units. A pair of rear brake motors selectively electrically actuate rear wheel brakes. Multiplex control of each of the pairs of front and rear wheel brakes is provided by an arrangement of first and second parallel valves for each wheel brake.

An electronic brake system is disclosed. The electronic brake system includes a pedal operation part connected to a brake pedal so as to provide better pedal feel to a driver of a vehicle; a first hydraulic circuit which includes two wheel brakes, a first hydraulic pressure supply part generating hydraulic pressure, and a plurality of valves, and is hydraulically connected to the pedal operation part; a second hydraulic circuit which includes the other two wheel brakes, a second hydraulic pressure supply part generating hydraulic pressure, and a plurality of valves, and is hydraulically connected to the pedal operation part; a first electric circuit configured to control the first hydraulic circuit; a second electric circuit configured to control the second hydraulic circuit; and a power-supply source configured to supply power to the first electric circuit and the second electric circuit. The first electric circuit and the second electric circuit are operated independently of each other.