Patent ID: 9341153
Filing Date: 2016-05-17
CPC Classification: F02M

Claim Text:
1. A method for cooling a fuel injector for an internal combustion engine, comprising: providing an injector body forming an actuator portion, wherein an actuator bore is formed in the actuator portion, the actuator bore being at least partially defined by an inner surface and by an end surface; placing an electrical actuator in the actuator bore, the electrical actuator having an outer surface; defining a flow channel between the inner surface of the actuator bore and the outer surface of the electrical actuator; defining a cooling flow passage in the injector body in fluid communication with the flow channel such that cooling fluid can be supplied to the flow channel through the cooling flow passage; forming a drain passage in the injector body in fluid communication with the flow channel; providing a flow of cooling fluid through 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 further providing the flow of cooling fluid through a plurality of channels formed in the injector body along the inner surface wherein the plurality of channels formed in the injector body along the inner surface includes a spiral channel, 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.