High pressure control valve for a fuel injection system
AssigneeCummins Engine Company, Inc.
InventorsDavid L. Buchanan, Donald J. Benson
Life of this patent
Estimating the term…
Abstract
A high pressure control valve according to the present invention provides effective and predictable control of a timing fluid and injection fuel metering system of an internal combustion engine. The control valve includes an armature that abuts against a majority of the surface of a valve element to help minimize beating problems. In addition, a compliant web means provides a flexing motion when the valve element seats with a valve seat to mitigate problems of seat beating. Furthermore, the present invention reduces the number of parts of the control valve to achieve simplicity in structure and lower costs, including eliminating the need for a valve stop pin.
Claims25
A control valve mounted to a compliant member of an internal combustion engine for selectively controlling fluid flow, comprising:
- a housing having at least one fluid passage formed therein;
- a valve seat surrounding said at least one passage formed in said housing;
- a valve element for contacting with said valve seat for selectively stopping fluid flow through said at least one passage;
- a biasing means for applying a closure force against said valve element in a direction towards said valve seat;
- and
- an actuation means for selectively causing movement of said valve element within an inner bore region formed in said housing,
- wherein said actuation means comprises:
- an armature positioned in said inner bore region in said housing for controlling the movement of said valve element between a closed position of said valve element in contact with said valve seat and an open position spaced away from said valve seat,
- a valve element supporting member positioned in said inner bore region of said housing in between said armature and said valve element wherein said valve element supporting member has a recessed area abutting with a majority of a surface area of said valve element;
- a limiting means positioned in said inner bore region for limiting the movement of said armature when said valve element moves from said closed position to said open position;
- and
- an armature shim means positioned between said armature and said limiting means for preventing contact between said armature and said limiting means.
A control valve mounted to a supporting member of an internal combustion engine for selectively controlling fluid flow, comprising:
- a housing having at least one fluid passage formed therein;
- a valve seat surrounding said at least one passage formed in said housing;
- a valve element for contacting said valve seat for selectively stopping fluid flow through said at least one passage;
- a biasing means for applying a closure force against said valve element in a direction towards said valve seat;
- a mounting means for connecting said housing to said supporting member of said internal combustion engine;
- a compliant web means for flexing when said valve element contacts with said valve seat when said valve element moves from an open position to a closed position, said compliant web means having a first predetermined thickness adjacent said valve seat which is less than a predetermined thickness of said mounting means;
- and
- an actuation means for selectively causing movement of said valve element within an inner bore region formed in said housing,
- wherein said actuation means comprises:
- an armature positioned in said inner bore region in said housing for controlling the movement of said valve element between said closed position of said valve element in contact with said valve seat and said open position spaced away from said valve seat, and
- a valve element supporting member positioned in said inner bore region of said housing in between said armature and said valve element wherein said valve element supporting member has a recessed area abutting with a surface of said valve element.
Dependencies are inferred from the claim text.