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Hydraulic brake pressure control system

  • US 6,450,591 B1
  • Filed: 08/03/1998
  • Issued: 09/17/2002
  • Est. Priority Date: 08/12/1997
  • Status: Expired due to Term
First Claim
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1. A hydraulic brake pressure control system including a master cylinder generating a brake fluid pressure proportional to brake pedal pressure, a high-pressure supply device generating an increased brake fluid pressure, and a hydraulic circuit having a wheel cylinder device, the hydraulic circuit performing a master cylinder control to control a wheel cylinder pressure by using the pressure generated by the master cylinder, and performing a brake-by-wire control to control the wheel cylinder pressure by using the pressure generated by the high-pressure supply device, the hydraulic brake pressure control system comprising:

  • a master cut valve device provided in the hydraulic circuit for controlling a flow of brake fluid from the master cylinder into the wheel cylinder device;

    a wheel cylinder sensor device for outputting a signal indicative of the brake fluid pressure in the wheel cylinder device; and

    a malfunction position/mode detecting unit for detecting a malfunction position and a malfunction mode in the hydraulic brake pressure control system based on the combination of both the signal output by the wheel cylinder sensor device during the master cylinder control together with the signal output by the wheel cylinder sensor device during the brake-by-wire control.

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