Hydraulically actuated fuel injector with cold start features
AssigneeCaterpillar Inc.
InventorsJeffrey D. Graves, Martin A. Lehman
Life of this patent
Estimating the term…
Abstract
A hydraulically actuated fuel injector includes an injector body which has an outer surface. An armature cavity is defined by the injector body and a solenoid. The solenoid includes an armature, which is positioned within the armature cavity. Attached to the armature and positioned in the injector body is a valve member that defines a centerline. A plurality of evacuation passages which extend from the armature cavity to the outer surface are defined by the injector body. The armature and the evacuation passages are positioned on opposite sides of a plane that is oriented perpendicular to the centerline.
Claims19
An assembled hydraulically actuated fuel injector comprising:
- an injector body including an outer surface;
- a solenoid including an armature and a coil;
- an armature cavity defined by said injector body and said solenoid, and said armature being positioned in said armature cavity;
- a valve member defining a centerline and being positioned within said injector body and attached to said armature;
- said injector body defining a plurality of evacuation passages, said evacuation passages extending from said armature cavity to said outer surface, and
- said armature and said evacuation passages being positioned on opposite sides of a plane which is oriented perpendicular to said centerline when said solenoid is de-energized.
An engine including a hydraulically actuated fuel injection system comprising:
- an assembled hydraulically actuated fuel injector attached to said engine and defining an injector body;
- said injector body including an outer surface;
- a solenoid including an armature and a coil,
- an armature cavity defined by said injector body and said solenoid, and said armature being positioned in said armature cavity;
- a valve member defining a centerline and being positioned within said injector body and attached to said armature;
- said injector body defining a plurality of evacuation passages, said evacuation passages extending from said armature cavity to said outer surface;
- and
- said armature and said evacuation passages being positioned on opposite sides of a plane which is oriented perpendicular to said centerline when said solenoid is de-energized.
An assembled hydraulically actuated fuel injector comprising:
- an injector body defining an outer surface, a lubricating oil inlet passage, a lubricating oil drain, and a fuel inlet;
- a solenoid including an armature and a coil;
- an armature cavity defined by said injector body and said solenoid, and said armature being positioned in said armature cavity;
- a valve member defining a centerline and being positioned within said injector body and attached to said armature;
- said injector body defining a plurality of evacuation passages extending from said armature cavity to said outer surface;
- said evacuation passages opening on one side to said armature cavity and extending radially outward relative to said centerline;
- and
- said armature and said evacuation passages being positioned on opposite sides of a plane which is oriented perpendicular to said centerline when said solenoid is de-energized.
Dependencies are inferred from the claim text.