| 摘要 |
An anti-lock brake system which is integrally organized with a rolling-prevention solenoid valve having a relief function in a single modulator block in order to prevent a vehicle from rolling rearward on a slope upon starting of the vehicle. The anti-lock brake system, which comprises a master cylinder, a wheel cylinder, NO type and NC type solenoid valves to control flow of brake fluid, a hydraulic pump, and a low-pressure accumulator, further comprises a rolling-prevention solenoid valve installed on a connection path that connects an exit of the master cylinder to a supply path, and a relief valve installed to reduce a hydraulic brake pressure in the wheel cylinder to a predetermined pressure value in a closed state of a main orifice of the rolling-prevention solenoid valve.
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