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Anti-lock braking system capable of recording the operating conditions of elements thereof and recording method therefor

  • US 5,775,783 A
  • Filed: 07/24/1996
  • Issued: 07/07/1998
  • Est. Priority Date: 07/28/1995
  • Status: Expired due to Fees
First Claim
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1. An anti-lock braking system capable of recording operating conditions of elements thereof, comprising:

  • a wheel speed sensor attached to a wheel of a vehicle for sensing a wheel speed and generating a wheel speed signal;

    an ABS ECU connected to the wheel speed sensor so as to receive the wheel speed signal from the wheel speed sensor, the ABS ECU calculating a slip rate based on the wheel speed signal and generating electric signals for controlling fluid pressure applied to the wheel when the slip rate exceeds a predetermined normal value;

    a motor section, which is driven as the electric signal is input thereto by the ABS ECU;

    a pump section for increasing pressure of fluid, the pump section being operated by the motor section;

    a fluid pressure adjusting section for adjusting the fluid pressure applied to the wheel by intermittently transferring pressurized fluid to the wheel according to the electric signal from the ABS ECU; and

    a microcomputer for recording the operating conditions of the wheel speed sensor, the ABS ECU, the motor section, the pump section, and the fluid pressure adjusting section, respectively,wherein the microcomputer includes a first memory means comprising a random access memory for recording the operating conditions of the wheel speed sensor, the ABS ECU, the motor section, the pump section, and the fluid pressure adjusting section, respectively, and a second memory means comprised of an electrically erasable and programmable read only memory for storing data recorded in the first memory means,wherein the microcomputer is connected to an engine ECU to determine whether the engine ECU has been turned on or not, the microcomputer generating a reset signal for resetting the records stored in the second memory means when the engine ECU is turned on,wherein the microcomputer is connected to the ABS ECU to receive wheel-sliP rate data and the electric signals applied to both the motor section and the fluid pressure adjusting section from the ABS ECU, the microcomputer storing the data in the first memory means into the second memory means when the wheel-slip rate exceeds the predetermined normal value.

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