An electrohydraulic brake system of an off-road vehicle includes a first hydraulic brake circuit for a first vehicle axle; a second hydraulic brake circuit for at least one second vehicle axle; a respective wheel brake for each vehicle wheel per vehicle axle; an electronic control unit having a brake force distribution function; a brake signal generator; at least one central brake force distribution valve per brake circuit, a signal input of the control unit for registering a braking signal of the brake signal generator; and at least one signal output of the control unit per brake force distribution valve. A brake pressure for applying a hydraulic pressure fluid to the brake cylinders of the wheel brakes on the respective vehicle axles can be fed to the respective brake circuit by the control unit in conjunction with the central brake force distribution valve and the brake signal generator.

An electric brake system and a method for controlling the same are disclosed. The electric brake system includes a hydraulic control device, a sensing unit, and a controller. The hydraulic control device generates hydraulic pressure using a piston operated by an electric signal generated in response to a displacement of a brake pedal. The sensing unit detects driver's braking intention. When an electronic stability control (ESC) of a vehicle operates, the controller calculates a change amount of stroke of the piston needed to output brake pressure corresponding to the driver's braking intention, and acquires the calculated stroke change amount so as to boost pressure of each wheel at a predetermined slope.

This invention seeks to replace traditional brakes with a safer and more economical design. The traditional design uses friction to slow a vehicle, while the proposed design uses hydraulic fluid to slow down the motion of a vehicle. The rotor blade, whose design is shown in FIG. 1B, is mounted upon the bearing and is housed with the hydraulic fluid in the housing in FIG. 1A.

An apparatus for controlling an ABS of an ESC integrated brake system and a method thereof. The apparatus includes a main master cylinder generating hydraulic brake pressure through a piston that is moved forward/backward by an actuator that is operated when a brake pedal of a vehicle is pressed down; and a controller controlling forward/backward movement direction change of the piston by controlling a driving current that is applied to the actuator by determining whether a direction change condition according the control state of wheel pressure is satisfied, when a brake mode of the vehicle is an ABS mode and the piston has reached a predetermined direction change position for forward/backward movement direction change.

A hydraulic unit for a slip controller of a hydraulic vehicle brake system includes an electric motor, a plurality of hydraulic pumps, a hydraulic block, a plurality of solenoid valves, a rotation angle sensor, an electronic control unit, and a valve cover. The electric motor is positioned on a narrow side of the hydraulic block, and is configured to drive the hydraulic pumps. The electronic control unit includes a contacting mechanism, and is positioned in the valve cover. The electric motor and the solenoid valves are arranged so that the electric motor and electromagnets of the solenoid valves protrude to approximately a same extent from the hydraulic block to enable simple commutation with the rotation angle sensor and the contacting mechanism of the electronic control unit.

For operation of a hydraulic power vehicle braking system for autonomous driving, a brake pressure is generated using a second power brake pressure generator if, after a predefined first time span, no brake pressure or insufficient brake pressure has been generated using a first power brake pressure generator. The generation of the brake pressure using the second power brake pressure generator is aborted if, within a second time span, which is longer than the first time span, no error message is present from the first power brake pressure generator.

A traction control system is provided for a vehicle having wheels driven on a primary axle via an engine, and wheels on a secondary axle torsionally isolated from the engine. Wheel speed sensors and brakes are provided for each wheel. A motor/hydraulic pump is operatively associated with each secondary axle wheel for selectively powering the secondary axle wheel or being regenerativly powered by the secondary axle wheel for regenerative braking. A clutch is provided to connect each secondary axle wheel with the secondary axle wheel's motor/hydraulic pump. An accumulator is provided to hydraulically power the secondary axle wheels and to accept regenerative pressure from the secondary axle wheel's motor/hydraulic pump. A wheel valve is provided for each respective secondary axle wheel for selectively connecting the secondary axle wheel's motor/hydraulic pump with the accumulator. A controller is provided to control the primary axle and secondary axle wheels. The controller commands braking and powering of the primary and secondary axle wheels during low traction events.

A brake fluid pressure control device for a vehicle that includes a wheel speed obtaining device to obtain wheel speed, and a vehicle body deceleration calculating means to calculate a vehicle body deceleration on the basis of the wheel speed. If a condition is satisfied in which the vehicle body deceleration continues to stay at a low rate of less than or equal to a predetermined threshold value for a predetermined period of time, the pressure increasing rate in pressure increasing control is altered to a higher value than before the condition is satisfied. The brake fluid pressure of a brake caliper can quickly be brought close to the fluid pressure of a master cylinder. Therefore, it is possible to improve the brake responsiveness when the brake is re-operated by the driver during the ABS control, thereby reducing the driver's feeling of wrongness and strangeness.

An electric brake system and a method for controlling the same are disclosed. The electric brake system includes a hydraulic control device, a sensing unit, and a controller. The hydraulic control device generates hydraulic pressure using a piston operated by an electric signal generated in response to a displacement of a brake pedal. The sensing unit detects driver's braking intention. When an electronic stability control (ESC) of a vehicle operates, the controller calculates a change amount of stroke of the piston needed to output brake pressure corresponding to the driver's braking intention, and acquires the calculated stroke change amount so as to boost pressure of each wheel at a predetermined slope.

A brake apparatus includes a master cylinder, a hydraulic source, a reservoir tank, a fluid pool, a fluid level detection unit, and an electronic control unit. The electronic control unit is configured to switch brake control according to the fluid level detected by the fluid level detection unit. The brake fluid is transmitted from the first chamber to the wheel cylinder with use of the master cylinder to increase a pressure in the wheel cylinder. The brake fluid in the second chamber is transmitted to the wheel cylinder with use of the hydraulic source to increase a pressure in the wheel cylinder.