Fuel injector mounting arrangement
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorMasahiko Kato
Life of this patent
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Abstract
A mounting arrangement for a fuel injector comprises a cylinder head, a mounting bore formed in the cylinder head, a seat surface formed within the mounting bore, a fuel injector positioned within the mounting bore and comprising a seating surface, at least one sealing ring disposed about a portion of the fuel injector and positioned between the seating surface and the seat surface. The ring comprises a thermal insulator material and a resin material. The ring also comprises a deformable eyelet that expands radially inward in response to compressive axial forces. The resin material thermally activates at a temperature within the operating temperature range of the engine.
Claims31
A direct injected engine comprising a cylinder, a cylinder head being mounted to said cylinder, a piston being disposed within said cylinder, a combustion chamber being defined at least in part by said piston, said cylinder and said cylinder head, a mounting bore extending through said cylinder head, a fuel injector copending through said mounting bore, said mounting bore including a stepped seat surface, said fuel injector comprising a nozzle extending between a tip and a seating surface, said nozzle comprising a fuel injection port that is disposed to inject fuel directly into said combustion chamber, at least one sealing ring being disposed about said fuel injector between said seating surface and said seat surface, said sealing ring comprising a thermal insulating component and having a smaller outer diameter than an outer diameter of said seat surface.
A direct injected engine comprising a cylinder, a cylinder head being mounted to said cylinder, a piston being disposed within said cylinder, a combustion chamber being defined at least in part by said piston, said cylinder and said cylinder head, a mounting bore extending through said cylinder head, a fuel injector depending through said mounting bore, said mounting bore including a stepped seat surface, said fuel injector comprising a nozzle extending between a tip and a seating surface, said nozzle comprising a fuel injection port that is disposed to inject fuel directly into said combustion chamber, at least one sealing ring being disposed about said fuel injector between said seating surface and said seat surface, said sealing ring comprising a first layer of heat insulating material, a second outer layer of a thermally activatable material and having an outer diameter less than an outer diameter of said seat surface.
A direct injected engine comprising a cylinder, a cylinder head being mounted to said cylinder, a combustion chamber being defined at least in part by said cylinder head, a mounting bore extending through said cylinder head, said mounting bore comprising a stepped seat surface, a fuel injector having an upper portion and a lower portion, the lower portion extending into said mounting bore, said lower portion comprising a seating surface and a fuel injection nozzle, said fuel injection nozzle disposed to inject fuel directly into said combustion chamber, a pair of sealing rings being disposed about said fuel injector between said seating surface and said seat surface, said sealing rings each comprising a first layer of heat insulating material a second outer layer of a thermally activatable material, and each sealing ring having an outer diameter less than an outer diameter of said seat surface.
Dependencies are inferred from the claim text.