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Braking force distribution control system

  • US 5,547,264 A
  • Filed: 11/02/1993
  • Issued: 08/20/1996
  • Est. Priority Date: 11/04/1992
  • Status: Expired due to Term
First Claim
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1. A braking force distribution control system for controlling a braking force applied to a rear wheel of an automotive vehicle in a certain relationship with a braking force applied to a front wheel of said automotive vehicle, comprising:

  • a front wheel brake cylinder operatively connected to said front wheel for applying the braking force thereto;

    a rear wheel brake cylinder operatively connected to said rear wheel for applying the braking force thereto;

    a reservoir for storing a brake fluid therein;

    a master cylinder for pressurizing the brake fluid fed from said reservoir and supplying a hydraulic braking pressure to each of said front and rear wheel brake cylinders in response to depression of a brake pedal;

    pressure control valve means disposed in a hydraulic circuit communicating said master cylinder with at least said rear wheel brake cylinder for controlling the hydraulic braking pressure in said rear wheel brake cylinder;

    an auxiliary power source communicated with said reservoir for pressurizing the brake fluid fed from said reservoir and discharging a power pressure;

    dynamic hydraulic braking pressure regulating means communicated with said auxiliary power source for regulating said power pressure to a pressure regulated in a certain relationship with the hydraulic braking pressure discharged from said master cylinder in response to depression of said brake pedal;

    a changeover valve disposed between said master cylinder and said valve means and selectively placed in one of a first operating position for communicating said valve means with said master cylinder and blocking the communication between said valve means and said regulating means, and a second operating position for communicating said valve means with said regulating means and blocking the communication between said valve means and said master cylinder; and

    control means for placing said changeover valve from said first operating position to said second operating position, and actuating said valve means to control the hydraulic braking pressure in said rear wheel brake cylinder in a certain relationship with the hydraulic braking pressure in said front wheel brake cylinder.

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