Top stop assembly for a fuel injector

摘要

A top stop assembly for a fuel injector is provided which includes a top stop housing having a threadless injector engaging portion positioned at one end of the housing for threadlessly engaging the outer diameter portion of an injector barrel to minimize inward bore distortion. The top stop is preferably formed integrally on the top stop housing body to create a predetermined axial length of the housing which defines a predetermined outer limit of a retraction stroke of an injector plunger assembly, i.e. a top stop position. The top stop position is set by selecting a top stop housing having a predetermined axial length corresponding to the desired top stop position thereby reducing costs and avoiding loosening problems associated with multi-part top stop assemblies.