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    • 108. 发明专利
    • ANTI-LOCK BRAKE SYSTEM
    • JPH06109751A
    • 1994-04-22
    • JP21129292
    • 1992-08-07
    • ALLIED SIGNAL INC
    • RICHIYAADO ERIKOTSUTO SUTOREER
    • B60T8/58B60T8/1761G01P7/00
    • PURPOSE: To estimate the speed of a vehicle regardless of the speeds of the wheels by measuring the sinkage of the front end section of the vehicle when the brakes of the vehicle are applied and integrating the measured values. CONSTITUTION: When the brakes of a vehicle are applied, the front section of the vehicle sinks. A potentiometer 39 converts the vertical displacement of the front end section into the change of the input voltage of an amplifier 49. The voltage from the variable contact of the potentiometer 39 in a state where the sink of the front end section is zero, namely, in a steady state is balanced by appropriately setting a potentiometer 51. The output of the amplifier 49 is supplied to a resistance filter and an A/D converter 57 constituted of a resistor 53 and capacitor 55. The output is converted into acceleration by means of a multiplier 22. The acceleration is integrated by means of an integrator 25 and filtrated by means of a filter 27. Thereafter, the filtered integrated acceleration is used for estimating the momentary speed of the vehicle which is an input to an anti-lock brake system.