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Apparatus for fuel supply to spark ignition type internal combustion engine

  • US 4,165,348 A
  • Filed: 08/12/1977
  • Issued: 08/21/1979
  • Est. Priority Date: 08/26/1976
  • Status: Expired due to Term
First Claim
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1. A pressure adjusting device for a fuel supply apparatus for a spark ignition type of internal combustion engine, said apparatus comprising:

  • a cylinder, a piston slidable in said cylinder, said cylinder having an inlet opening into the inner end thereof for admitting liquid fuel from the discharge side of a fuel pump, said piston and cylinder having a small gap therebetween extending along a portion of the length thereof with the length of the gap being varied during motion of the piston in and out of the cylinder, said cylinder having an outlet therefrom at the end of the gap remote from the inlet for discharging liquid fuel passing through said gap to the intake side of a fuel pump, a bellows at the opposite end of said piston from said gap and having a bellows plate attached to the said opposite end of said piston, the space outside of said bellows being open to the atmosphere, and means connected to said bellows for communicating the interior of the bellows with the static pressure of a Venturi throat in the air intake of the fuel supply apparatus.

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