Based on the signals received from the 4 wheel speed sensors and yaw rate & deceleration sensor, the skid control ECU calculates each wheel speed and deceleration, and checks wheel slipping condition. According to the slipping condition, the ECU controls the pressure holding solenoid valve and pressure reduction solenoid valve in order to adjust the fluid pressure of each wheel cylinder in the following three modes: pressure reduction, pressure holding, and pressure increase modes.
Pressure Increase Mode
Pressure Holding Mode
Pressure Reduction Mode
Reservoir and Pump
From Wheel Cylinder
Pressure Holding Valve (Port A)
Pressure Reduction Valve (Port B)
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