Fuel injection valve assembly for reciprocating gas engine
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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Reexamination
Accused Products
Abstract
A fuel injection valve assembly is provided for use in a reciprocating gas engine. The valve assembly comprises a valve cage, a replaceable valve cartridge, a keeper ring, and an external spring. The valve cartridge is replaceable without the necessity of removing the valve cage from the engine.
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Citations
33 Claims
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1. A fuel injection valve assembly for use in a reciprocating gas engine, comprising:
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(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. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15)
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2. A fuel injection valve assembly for use in a reciprocating gas engine, comprising:
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(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 counterbore at the end opposite the outside threads, and at least one fuel seat port between the outside threads and the counterbore, the port being adapted for the flow of fuel from an annular space, between the inside wall of said valve cage and the outside of said valve cartridge, to a combustion chamber of the engine, (2) a valve seat with a seat face at one end and a first cylindrical extension at the other end, the first cylindrical extension being adapted to fit tightly into the counterbore of the stem housing, (3) a valve with a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the seat face, a valve stem attached to the frustoconical element and passing through the stem housing and the valve seat, and stem threads at the opposite end of the valve stem from the frustoconical 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. - View Dependent Claims (12, 33)
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16. A valve cartridge for use in a fuel injection system for a reciprocating gas engine, comprising:
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(a) a stem housing with an outside diameter less than the inside diameter of a cartridge-receiving bore of a valve cage on the engine whereby the valve cartridge is removable from the valve cage without removing the valve cage from the engine, said stem housing having (1) outside threads adapted to engage threads of the cartridge-receiving bore, the bore leading to a combustion chamber of the engine, (2) a valve seat at the end opposite the outside threads, and (3) at least one fuel seat port between the outside threads and the valve seat, the port being adapted for the flow of fuel from outside said valve cartridge to a combustion chamber of the engine; and (b) a valve having (1) a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the face of the valve seat and (2) a valve stem attached to the frustoconical element and passing through the stem housing. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 27, 28)
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17. A valve cartridge for use in a fuel injection system for a reciprocating gas engine, comprising:
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(a) a stem housing with an outside diameter less than the inside diameter of a cartridge-receiving bore of a valve cage on the engine whereby the valve cartridge is removable from the valve cage without removing the valve cage from the engine, said stem housing having (1) outside threads adapted to engage threads of the cartridge-receivng bore, the bore leading to a combustion chamber of the engine, (2) a counterbore at the end opposite the outside threads, and (3) at least one fuel seat port between the outside threads and the counterbore, the port being adapted for the flow of fuel from outside said valve cartridge to a combustion chamber of the engine, (b) a valve seat having (1) a seat face on one end and (2) a first cylindrical extension at the other end, the first cylindrical extension being adapted to fit tightly into the counterbore of said stem housing; and (c) a valve having (1) a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the seat face and (2) a valve stem attached to the frustoconical element and passing through the stem housing and the valve seat. - View Dependent Claims (26)
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29. A fuel injection valve assembly for use in a reciprocating gas engine, comprising:
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(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 and cartridge-engaging means for holding a valve cartridge in place within the cartridge-receiving bore; (b) a valve cartridge having (1) a stem housing with an attachment means for engaging the cartridge-engaging means at one end of the stem housing, a valve seat at the opposite end thereof, and at least one fuel seat port between the attachment means and the valve seat, the port being adapted for the flow of fuel from an annular space, between the 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 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, and a stem-engaging means at the opposite end of the valve stem from the frustoconical element; (c) a keeper ring engaged with the stem-engaging means 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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30. A fuel injection valve assembly for use in a reciprocating gas engine, comprising:
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(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 and a cartridge-engaging means for holding a valve cartridge in place within the cartridge-receiving bore; (b) a valve cartridge having (1) a stem housing with an attachment means for engaging the cartridge-engaging means at one end of the stem housing, a counterbore at the opposite end thereof, and at least one fuel seat port between the attachment means and the counterbore, the port being adapted for the flow of fuel from an annular space, between the inside wall of said valve cage and the outside of said valve cartridge, to a combustion chamber of the engine, (2) a valve seat with a seat face at one end and a first cylindrical extension at the other end, the first cylindrical extension being adapted to fit tightly into the counterbore of the stem housing, (3) a valve with a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the seat face, a valve stem attached to the frustoconical element and passing through the stem housing and the valve seat, and a stem-engaging means at the opposite end of the valve seat from the frustoconical element; (c) a keeper ring engaged with the stem-engaging means 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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31. A valve cartridge for use in a fuel injection system for a reciprocating gas engine, comprising:
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(a) a stem housing with an outside diameter less than the inside diameter of a cartridge-receiving bore of a valve cage on the engine whereby the valve cartridge is removable from the valve cage without removing the valve cage from the engine, said stem housing having (1) an attachment means adapted for engaging a cartridge-engaging means on the valve cage and holding the valve cartridge within the cartridge-receiving bore, the bore leading to a combustion chamber of the engine (2) a valve seat at the end opposite the attachment means, and (3) at least one fuel seat port between the attachment means and the valve seat, the port being adapted for the flow of fuel from outside said valve cartridge to a combustion chamber of the engine; and (b) a valve having (1) a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the face of the valve seat and (2) a valve stem attached to the frustoconical element and passing through the stem housing.
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32. A valve cartridge for use in a fuel injection system for a reciprocating gas engine, comprising:
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(a) a stem housing with an outside diameter less than the inside diameter of a cartridge-receiving bore of a valve cage on the engine whereby the valve cartridge is removable from the valve cage without removing the valve cage from the engine, said stem housing having (1) an attachment means adapted for engaging a cartridge-engaging means on the valve cage and holding the valve cartridge within the cartridge-receiving bore, the bore leading to a combustion chamber of the engine, (2) a counterbore at the end opposite the attachment means, and (3) at least one fuel seat port between the attachment means and the counterbore, the port being adapted for the flow of fuel from outside said valve cartridge to a combustion chamber of the engine; (b) a valve seat having (1) a seat face on one end and (2) a first cylindrical extension at the other end, the first cylindrical extension being adapted to fit tightly into the counterbore of said stem housing; and (c) a valve having (1) a substantially frustoconical element, the surface of which having a valve face adapted to fit tightly against the seat face and (2) a valve stem attached to the frustoconical element and passing through the stem housing and the valve seat.
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Specification