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Fuel injection valve assembly for reciprocating gas engine

  • US 4,365,756 A
  • Filed: 08/11/1980
  • Issued: 12/28/1982
  • Est. Priority Date: 08/11/1980
  • Status: Expired due to Term
First Claim
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1. A fuel injection valve assembly for use in a reciprocating gas engine, comprising:

  • (a) a valve cage adapted for mounting on the body of the engine by insertion of a cylindrical lower portion thereof into an opening in the engine body leading to a combustion chamber of the engine, said valve cage having a cartridge-receiving bore with threads at the end of the bore nearer the outside of the engine;

    (b) a valve cartridge having(1) a stem housing with outside threads engaging the threads of the cartridge-receiving bore, a valve seat at the end opposite the outside threads, and at least one fuel seat port between the outside threads and the valve seat, the port being adapted for the flow of fuel from an annular space, between inside wall of said valve cage and the outside of said valve cartridge, to a combustion chamber of the engine,(2) a valve with a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the face of the valve seat, a valve stem attached to the frustoconical element and passing through the stem housing, the stem threads at the opposite end of the valve stem from the frustoconcial element;

    (c) a keeper ring threadably engaged with the stem threads of the valve; and

    (d) an external spring between said keeper ring and said valve cage, said external spring biasing the valve in the closed position.

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