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ELECTRIC FUEL PUMP CONTROL CIRCUIT FOR INTERMITTENT INJECTION ELECTRONIC FUEL CONTROL SYSTEMS

  • US 3,822,677 A
  • Filed: 06/30/1971
  • Issued: 07/09/1974
  • Est. Priority Date: 06/30/1971
  • Status: Expired due to Term
First Claim
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1. A fuel pump control circuit for an internal combustion engine fuel control system having pulse generating means for producing pulses having durations indicative of the fuel requirement, injector valve means responsive to said pulses for supplying fuel to the engine, and energizable fuel pump means having an average flow capacity proportional to average energization, said fuel pump control circuit comprising:

  • output means for providing a variable level fuel pump energizing signal; and

    control means responsive to the pulse generating means operative to energize the output means to a maximum value during receipt of a pulse and to gradually reduce the energization during the entire interval between successive pulses whereby the average energization is proportional to the output pulse duration and inversely proportional to the interval between successive output pulses.

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