Control valve having a top mounted single pole solenoid for a fuel injector
AssigneeCaterpillar Inc.
InventorsDana R. Coldren, Charles D. Ellenbecker, Ching W. Jaw
Life of this patent
Estimating the term…
Abstract
A control valve, preferably for use in a fuel injector, includes a valve body defining an inlet passage separated from an outlet passage by a valve seat. A single pole solenoid is attached to the valve body, and includes a pole piece and an armature. A valve member with a centerline is positioned in the valve body, attached to the armature and moveable between an open position in which the inlet passage is open to the outlet passage, and a closed position in which the inlet passage is closed to the outlet passage. The pole piece is positioned between the valve seat and the armature along the centerline of the valve member.
Claims19
A control valve comprising:
- a valve body defining an inlet passage separated from an outlet passage by a valve seat;
- a single pole solenoid attached to said valve body, and including a pole piece and an armature;
- a valve member with a centerline being positioned in said valve body and attached to said armature;
- said pole piece being positioned between said valve seat and said armature along said centerline;
- said valve member being moveable between an open position in which said inlet passage is open to said outlet passage, and a closed position in which said inlet passage is closed to said outlet passage;
- wherein said solenoid is positioned within an inner cavity;
- and
- said valve body defines a flow passage extending between said outlet passage and said inner cavity.
A control valve comprising:
- a valve body defining an inlet passage separated from an outlet passage by a flat valve seat;
- a single pole solenoid attached to said valve body, and including a pole piece, a coil with an inside diameter and an armature with an outside diameter that is less than said inside diameter;
- a valve member with a centerline and an annular knife edge being positioned in said valve body and attached to said armature;
- said pole piece being positioned between said valve seat and said armature along said centerline;
- said valve member being moveable between an open position in which said inlet passage is open to said outlet passage, and a closed position in which said inlet passage is closed to said outlet passage;
- said single pole solenoid being positioned within an inner cavity that is at least partially defined by said valve body;
- said valve body defines a flow passage extending between said outlet passage and said inner cavity;
- and
- said valve member moves away from said coil when moving from said open position to said closed position.
A fuel injector comprising:
- an injector body defining a nozzle outlet and a cartridge opening, and further defining a spill passage and a return passage that open into said cartridge opening;
- a cartridge control valve with a valve body and being received in said cartridge opening and attached to said injector body;
- said valve body defining an inlet passage separated from an outlet passage by a valve seat, and said inlet passage opening to said spill passage, and said outlet passage opening to said return passage;
- a single pole solenoid attached to said valve body, and including an armature;
- a valve member being positioned in said valve body, attached to said armature, and being moveable between an open position in which said inlet passage is open to said outlet passage, and a closed position in which said inlet passage is closed to said outlet passage;
- and
- said valve member moves away from said coil when moving from said open position to said closed position.
Dependencies are inferred from the claim text.