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ELECTRONICALLY CONTROLLED FUEL-SUPPLY SYSTEM FOR COMPRESSION-IGNITION ENGINE

  • US 3,851,635 A
  • Filed: 09/05/1972
  • Issued: 12/03/1974
  • Est. Priority Date: 05/14/1969
  • Status: Expired due to Term
First Claim
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1. A system for controlling the fuel supply to a compressionignition engine having a plurality of piston cylinders each provided with a fuel injector, comprising:

  • a source of fuel for said engine;

    a distributing channel having a plurality of branches extending to a drain for excess fuel;

    engine-controlled pump means for delivering fuel at high pressure to said channel in a succession of compression strokes;

    a pair of electrically controlled valves disposed in tandem in each of said branches, said pair including a normally open first valve and a normally closed second valve;

    an extension conduit leading from each branch to a respective fuel injector, said conduit communicating with the corresponding branch at a location downstream of said first valve and upstream of said second valve; and

    electronic gating means for periodically opening said first valve and concurrently closing said second valve of each branch in cyclic succession during successive injection intervals for admitting fuel from said channel to the respective injectors.

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