Patent ID: 6908040
Filing Date: 2005-06-21
Classification: F02M

Abstract:
1. A unit injector assembly for injecting fuel into a combustion chamber of an engine, the unit injector assembly comprises: an injector body defining a plunger piston bore and an injection chamber bore therein; a valve assembly selectively movable between a flow passing position and a flow blocking position; a plunger assembly having a plunger piston, the plunger piston being disposed in the plunger piston bore of the injector body to define a pumping chamber in the injector body; an injector tip assembly having a tip check stem, the tip check stem being disposed in the injection chamber bore of the injector body and operative to control the flow of injection fuel from the injection chamber bore; a first fuel passageway defined in the injector body between the pumping chamber and the injection chamber bore; a second fuel passageway defined in the injector body between the injection chamber bore and the valve assembly; a flow restricting fuel passageway defined in the injector body continuously interconnecting one of the pumping chamber and the first fuel passageway with the second fuel passageway.