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Anti-skid brake control method

  • US 5,150,950 A
  • Filed: 07/30/1990
  • Issued: 09/29/1992
  • Est. Priority Date: 07/31/1989
  • Status: Expired due to Fees
First Claim
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1. In a fluid-pressure control apparatus for an anti-skid braking control apparatus in a vehicle which includes:

  • (A) a pair of front wheels and a pair of rear wheels diagonally connected to said front wheels, respectively, in dual brake conduit systems;

    (B) wheel speed sensors associated respectively with the front and rear wheels for detecting the rotational speeds of the respective wheels;

    (C) a control unit for generating brake control signals corresponding to the rotational behaviors of the respective wheels and valve control signals on the basis of the outputs of said wheel speed sensors; and

    (D) fluid pressure control valve means arranged in the respective brake conduit systems and operable by said valve control signals from said control unit;

    an anti-skid brake control method in which brake control signals from said front wheels are used preferentially to brake control signals from said rear wheels as said valve control signals in the respective brake conduit system, comprising the steps of;

    generating said brake control signal from any one of said wheels;

    identifying the specific wheel from which said brake control signal is generated;

    using said brake control signal as said valve control signal to operate said fluid pressure control valve means in the one brake conduit system to which said specific wheel belongs if said specific wheel is a front wheel of said vehicle and using said brake control signal as said valve control signal to operate said fluid pressure control valve means in the one brake conduit system to which said specific wheel belongs if a said specific wheel is a rear wheel of said vehicle and only if said vehicle is detected to be decelerating at a rate greater than a predetermined reference deceleration and, is further detected to be straight-running or, (b) the other rear wheel is detected to be slipping at a rate greater than a predetermined first reference slip.

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