ABS CONTROL OUTLINE [L3]
BUE041343750N06
Features
• ABS control occurs when wheel slip is determined by the ABS CM (based on the four ABS wheel-speed sensors). Then, the ABS HU pump motor, inlet and outlet solenoid valves are operated and brake fluid pressure is controlled accordingly to prevent wheel lock-up.
• Use of ABS control during emergency braking or on slippery road surfaces allows directional stability to be maintained, steerability ensured and stopping distance to be reduced.
• The ABS control system has independent front wheel control and unified control (select low) for the rear wheels.
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Note
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• Select low control: A control system in which the left and right vehicle wheel speeds are compared and brake fluid pressure is controlled according to the wheel most likely to lock-up.
Structure
Block Diagram
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1
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ABS wheel-speed sensor (LF)
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2
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ABS wheel-speed sensor (RF)
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3
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ABS wheel-speed sensor (LR)
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4
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ABS wheel-speed sensor (RR)
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5
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Solenoid valve
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6
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Pump motor
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7
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Caliper piston (LF)
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8
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Caliper piston (RF)
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9
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Wheel cylinder (LR)
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10
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Wheel cylinder (RR)
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