Abstract: A target wheel cylinder pressure for each wheel is calculated according to an amount of braking operation performed by a vehicle operator. When anti-skid control is required, the wheel cylinder pressure is controlled to be equal to the target wheel cylinder pressure for reducing the brake slip of the wheel. When one of the rear-left and the rear-right wheels is anti-skid controlled, the target wheel cylinder pressure for the other wheel for which the anti-skid control is not performed is set to the same value as the target wheel cylinder pressure for the wheel for which the anti-skid control is performed. Linear valves are controlled based on the target wheel cylinder pressure, controlling the wheel cylinder pressures for the rear-left and the rear-right wheels to have substantially the same value.

Abstract: The present invention is directed to a front-rear braking force distribution control system for a vehicle. The system includes a wheel brake cylinders operatively associated with front and rear wheels of the vehicle, a pressure generator for pressurizing brake fluid in response to operation of a brake pedal to generate a hydraulic braking pressure and supply it to each of the wheel brake cylinders, and a pressure control device disposed between the pressure generator and the wheel brake cylinders for controlling the braking pressure in each of the wheel brake cylinders. A pressure sensor is provided for detecting the braking pressure generated by the pressure generator, and the detected braking pressure is compared with a predetermined threshold pressure.

Abstract: An antilock brake system (ABS) control apparatus for a four-wheel drive vehicle, having a slope identifier for determining the drive status of the vehicle along a slope before an ABS control is started, and a controller that changes the usual ABS control to a control in which the ABS control is restricted on condition that the state of the drive along the slope has been decided, whereby the braking distance of the vehicle during the drive along the slope can be shortened.