Patent ID: 6408829
Filing Date: 2002-06-25
Classification: F02M

Abstract:
A fuel injector, comprising:an electric controller for controlling the flow of a high pressure actuating fluid responsive to initiation and cessation of a pulse width command, the pulse width command defining the duration of an injection event; an intensifier being in fluid communication with the controller, the intensifier being translatable to increase the pressure of a volume of fuel in a plunger chamber for injection into the combustion chamber of an engine, the intensifier having an intensifier piston disposed in a cylinder defined in an injector housing; an injector nozzle in fluid communication with the intensifier; a delay device in fluid communication with the intensifier and the injector nozzle, being shiftable between a first disposition and a second disposition over a certain period of time after initiation of the pulse width command, the period of time effecting a delay in initiation of at least a portion of the fuel injection from the injector nozzle after initiation of the pulse width command, the delay device including a delay piston translationally disposed in a delay piston cylinder defined at least in part in the injector housing, actuation of the delay device being effected by a flow of selectively throttled pressurized fuel.