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Fuel injection control system for internal combustion engine

  • US 5,388,562 A
  • Filed: 04/30/1993
  • Issued: 02/14/1995
  • Est. Priority Date: 05/08/1992
  • Status: Expired due to Fees
First Claim
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1. A fuel injection control system having a computer implemented feedback control for the fuel injection of an internal combustion engine of a vehicle, comprising:

  • a) abnormality detection means for detecting an abnormality of the feedback control; and

    b) limp home circuit means for conducting an open loop control of the fuel injection of the engine in place of the feedback control when an abnormality of the feedback control is detected by said abnormality detection means to enable a reduced speed operation of the vehicle, said limp home circuit means including fuel cutoff means for interrupting a fuel supply to the internal combustion engine when a rotational speed thereof exceeds a predetermined value which varies as a function of an accelerator pedal depression.

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