Provided is a brake control device in which a stable intermediate opening degree can be achieved. The amount of energization for energizing a solenoid of an electromagnetic valve is calculated in accordance with upstream-downstream pressure difference of the electromagnetic valve before the end of hydraulic pressure adjustment of a braking force generator. The valve opening amount of the electromagnetic valve is controlled to fall within an intermediate opening range between the open and closed positions of the electromagnetic valve.

An object of the present invention is to provide a pump device that is capable of improving a discharge performance. A first orifice 301 that is provided on a discharge oil passage (a pipe 12) of a pump 2 and a second orifice 302 that, when a flow amount Q becomes greater than a predetermined flow amount Q1, allows pass of brake fluid are provided.

A brake fluid pressure control device for vehicles with bar handle which is configured to start a holding control of a fluid pressure of a wheel brake according to wheel deceleration calculated based on a wheel speed of the vehicle is provided. In the brake fluid pressure control device, the vehicle includes an acceleration sensor which is configured to detect acceleration in a front-rear direction of the vehicle, acceleration, detected by the acceleration sensor, which occurs in a rearward direction when the vehicle is decelerating is detected as a positive value, and the holding control is started when it is judged that the acceleration detected by the acceleration sensor is larger than or equal to a detection acceleration threshold value and the wheel deceleration is smaller than or equal to a wheel deceleration threshold value.

A brake fluid pressure control device for vehicles with bar handle which is configured to start a holding control of a fluid pressure of a wheel brake according to wheel deceleration calculated based on a wheel speed of the vehicle is provided. In the brake fluid pressure control device, the vehicle includes an acceleration sensor which is configured to detect acceleration in a front-rear direction of the vehicle, acceleration, detected by the acceleration sensor, which occurs in a rearward direction when the vehicle is decelerating is detected as a positive value, and the holding control is started when it is judged that the acceleration detected by the acceleration sensor is larger than or equal to a detection acceleration threshold value and the wheel deceleration is smaller than or equal to a wheel deceleration threshold value.

A brake fluid pressure control device for vehicles with bar handle, includes: an acceleration acquiring unit which is configured to acquire acceleration that occurs in the vehicle; and a control unit which is configured to judge a probability of occurrence of a rear-wheel lift based on the acceleration acquired by the acceleration acquiring unit, and which is configured to perform a pressure reduction control on a front wheel brake when judging that the occurrence of the rear-wheel lift is probable, the control unit which is configured to adjust a degree of pressure reduction of the pressure reduction control based on a differentiation value of the acceleration acquired by the acceleration acquiring unit.

A brake fluid pressure control device for vehicles with bar handle, includes: an acceleration acquiring unit which is configured to acquire acceleration that occurs in the vehicle; and a control unit which is configured to judge a probability of occurrence of a rear-wheel lift based on the acceleration acquired by the acceleration acquiring unit, and which is configured to perform a pressure reduction control on a front wheel brake when judging that the occurrence of the rear-wheel lift is probable, the control unit which is configured to adjust a degree of pressure reduction of the pressure reduction control based on a differentiation value of the acceleration acquired by the acceleration acquiring unit.

Example hydraulic brake actuators and related methods are disclosed herein. An example hydraulic brake actuator includes a rotary valve disposed in a bore of a housing. The rotary valve includes a shaft rotatably disposed within a sleeve. The sleeve and the shaft have ports that align at certain rotational positions to create a flow path between the bore and an inner chamber of the shaft. The example hydraulic brake actuator also includes a pump coupled to the shaft to increase and decrease a pressure within the inner chamber of the shaft.

Example hydraulic brake actuators and related methods are disclosed herein. An example hydraulic brake actuator includes a rotary valve disposed in a bore of a housing. The rotary valve includes a shaft rotatably disposed within a sleeve. The sleeve and the shaft have ports that align at certain rotational positions to create a flow path between the bore and an inner chamber of the shaft. The example hydraulic brake actuator also includes a pump coupled to the shaft to increase and decrease a pressure within the inner chamber of the shaft.

A rear wheel regenerative braking control system for vehicle, may include a brake controller; a vehicle controller; a hydraulic controller; and a motor controller, wherein the system and the method may maximize an amount of rear wheel regenerative braking while easily securing braking stability of a vehicle.

A rear wheel regenerative braking control system for vehicle, may include a brake controller; a vehicle controller; a hydraulic controller; and a motor controller, wherein the system and the method may maximize an amount of rear wheel regenerative braking while easily securing braking stability of a vehicle.