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Process and apparatus for the stabilization of the period of opening of electromagnetic fuel injector

  • US 4,140,084 A
  • Filed: 11/18/1976
  • Issued: 02/20/1979
  • Est. Priority Date: 12/09/1975
  • Status: Expired due to Term
First Claim
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1. A process for stabilization of the period of opening of an electromagnetic injector in a fuel injection system, particularly for motor vehicles, such that the quantity of fuel injected is, for a given commanded injector opening period, independent of vehicle battery voltage, said process of the type in which the time at which a control unit begins computation of the injector open time is determined from the characteristic variation in time of the injector energizing current, comprising the steps of:

  • providing an injection control signal;

    detecting a discontinuity systematically present in the rise of the energizing current of the injector;

    generating a detection signal indicative of the ccurrence of said discontinuity; and

    providing said detection signal to said control unit, whereby said control unit begins computation of the injector open time with the reception of said detection signal.

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