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Combined electric fuel pump control circuit intermittent injection electronic fuel control systems

  • US 3,967,598 A
  • Filed: 12/14/1973
  • Issued: 07/06/1976
  • Est. Priority Date: 06/30/1971
  • Status: Expired due to Term
First Claim
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1. A non-return fuel supply system for a fuel injection system having an electronic control unit generating intermittent control pulses and one or more fuel injector valves adapted to be actuated in timed duration by said control pulses, the improvement comprising:

  • a fuel supply tank;

    fuel pump means connected to said supply tank for pressuring fuel received therefrom in response to energization of the fuel pump means;

    fuel delivery conduit means for receiving the entire pressurized fuel output of the fuel pump means and adapted to supply said entire fuel output to the injectors;

    fuel accumulator means connected to said fuel delivery conduit means for regulating pressure and storing fuel therein;

    first control means coupling said electronic control unit and both said fuel pump means and said injector means operative to normally energize said fuel pump means and provide said control pulses to said injector valves.second control means coupling electronic control unit and said pump means operative for a predetermined duration commenced when said system is first energized to energize said fuel accumulator means to a fluid pressure and volume sufficient for initial injection; and

    means connecting said first and second control means for preventing said second control means from energizing said injector valves during said predetermined duration.

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