Patent ID: 8056537

Claim:
An internal combustion engine comprising: an engine housing having at least one cylinder therein; a fuel injector having an injector body defining a first fuel inlet and a second fuel inlet, and having a control valve assembly positioned within the injector body; an actuator subassembly associated with the control valve assembly, including an actuator and a heat exchange interface; a fuel system which includes a fuel supply circuit having a plurality of fuel supply circuit segments, the fuel supply circuit connecting with the first fuel inlet of the fuel injector; and a cooling system associated with the actuator subassembly including a cooling circuit with a plurality of cooling circuit segments, including a first cooling circuit segment in common with a first fuel supply circuit segment of the fuel system, a second cooling circuit segment connecting with the second fuel inlet, and a third cooling circuit segment defined by the injector body which is configured to pass fuel across the heat exchange interface of the actuator subassembly to exchange heat therewith.