Patent ID: 6286768
Filing Date: 2001-09-11
Classification: F02M

Abstract:
A unit fuel injector for injecting fuel into the combustion chamber of an internal combustion engine, comprising:an injector body including an upper body section, a central bore formed in said upper body section, a lower body section and an injection orifice formed in one end of said injector body to discharge fuel into the combustion chamber;a plunger means mounted in said central bore for reciprocal movement through advancement and retraction strokes; anda threadless injector body attaching means positioned at an interface between said upper body section and said lower body section for attaching said upper body section to said lower body section while avoiding imparting a transverse load to said upper body section, wherein said threadless injector body attaching means includes a groove formed in one of said upper body section and said lower body section, and at least one pin positioned in said groove, said groove at least partially forming a cavity having a peripheral extent and said at least one pin includes a width less than said cavity peripheral extent to create a slip fit between said groove and said at least one pin permitting slight relative axial movement between said upper body section and said lower body section.