发明授权
US5924777A Antilock brake system 失效
防抱死制动系统

Antilock brake system
摘要:
In an antilock brake system in which brake fluid that flows out to a low back-pressure reservoir at the time of a reduction in brake pressure is fed into a wheel brake by a motor driving pump without passing through a control valve to thereby gradually increase the pressure, it is possible to increase the brake fluid pressure to a pressure sufficient to prevent wheel lock even if the road surface has a low coefficient of friction. If, at the time of the reduction in brake fluid pressure, a device for estimating the coefficient of friction of the road surface determines that the road surface coefficient of friction is low, the motor is deactuated (or operated at low velocity) so that the pump will not feed brake fluid to the wheel brake (or so that the amount of brake fluid fed from the pump to the wheel brake is reduced).
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