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Gaseous fuel injector

  • US 5,408,967 A
  • Filed: 10/22/1993
  • Issued: 04/25/1995
  • Est. Priority Date: 10/22/1993
  • Status: Expired due to Fees
First Claim
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1. A gaseous fuel injection system for an engine having a cylinder, a piston in the cylinder, and an inlet port at the cylinder comprising:

  • a fuel inlet passage communicating with the inlet port for connection to a gaseous fuel source under pressure;

    fuel valve means movable between an open position for allowing fuel to flow in the inlet passage and a closed position preventing fuel flow;

    biasing means comprising a sealed chamber adjacent the fuel valve means that is pressurizable to exert a force on the fuel valve means to bias the fuel valve means into the closed position; and

    means for controlling the biasing means comprising second valve means to reduce pressure in the sealed chamber at timed intervals such that the pressurized gaseous fuel acts to move the fuel valve means to the open position to deliver fuel to the engine cylinder via the fuel inlet passage.

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