Patent ID: 8517284

Claim:
A fuel injector for an internal combustion engine, comprising: an injector body forming an actuator portion; an actuator bore formed in the actuator portion, the actuator bore at least partially defined by an inner surface and by an end surface; an electrical actuator disposed in the actuator bore and having an outer surface; a flow channel defined between the inner surface of the actuator bore and the outer surface of the electrical actuator; a cooling flow passage formed in the injector body in fluid communication with the actuator bore and adapted to supply cooling fluid to the actuator bore; a drain passage formed in the injector body in fluid communication with the actuator bore; an internal cooling fluid flow path extending from the cooling flow passage, through the flow channel, and from the flow channel through the drain passage; and a plurality of channels formed in the injector body along the inner surface, wherein a cooling fluid opening is formed in the end surface to fluidly connect the actuator bore with the cooling flow passage, and wherein an inlet portion of each of the plurality of channels is disposed adjacent to the cooling fluid opening.