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Anti-lock control computer malfunction detecting device

  • US 5,697,679 A
  • Filed: 11/21/1995
  • Issued: 12/16/1997
  • Est. Priority Date: 12/05/1994
  • Status: Expired due to Fees
First Claim
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1. An anti-lock controller for detecting a locked condition of at least one wheel of a vehicle based on a pulse signal indicating a rotating speed of said wheel, said controller comprising:

  • buffer storage means for receiving and storing said pulse signal;

    edge detection means for detecting edges of said stored pulse signal;

    timer means for detecting a time when said edge detection means detects edges of said stored pulse signal;

    interrupt detection means for receiving said pulse signal received by said buffer storage means, said interrupt detection means producing an interrupt signal upon receipt of said pulse signal and inputting said interrupt signal to said anti-lock controller, said anti-lock controller executing a routine for detecting the locked condition of said wheel upon receipt of said interrupt signal; and

    malfunction determination means for determining that said anti-lock controller malfunctions when said interrupt signal is absent with a detection of said pulse signal.

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