Patent ID: 7520266
Filing Date: 2009-04-21
Classification: F02M

Abstract:
1. A fuel injector, comprising: a plunger reciprocatingly disposed within a bore; a nozzle member having a tip end with at least one orifice; a valve needle having a base end and tip end, being disposed within the nozzle member, and movable against a spring bias from a flow blocking position at which substantially no fuel flows through the at least one orifice, to a flow passing position at which fuel flows through the at least one orifice; a check valve in fluid communication with the bore and the base end of the valve needle, the check valve movable between a first position at which the base end of the valve needle is fluidly communicated with the bore, and a second position at which the base end of the valve needle is fluidly communicated with a drain; a spill valve associated with the bore and movable between a first position at which fuel flows from the bore to the drain, and a second position at which the fuel from the bore is blocked from the drain; and a controller in communication with the check valve and the spill valve, the controller being configured to: