Patent ID: 8500036

Claim:
A fuel injector for an internal combustion engine, comprising: an injector body; an actuator having a post disposed within the injector body, the post arranged to travel over an actuator stroke distance between an extended stroke position when the actuator is in an activated condition and a retracted stroke position when the actuator is in a deactivated condition; a control valve disposed within the injector body and being displaceable to an open position from a closed position when an opening force is applied to the control valve; a transmission arrangement disposed in the injector body between the post and the control valve, the transmission arrangement comprising: an intensifier bore defined in the injector body; an intensifier piston slidably disposed within the intensifier bore and arranged to physically contact the post when the post moves towards the extended stroke position; a pin slidably disposed within a pin bore defined in the injector body, the pin being in contact with the intensifier piston and having a finger in contact with the control valve; wherein the actuator force from the post is mechanically transmitted to the control valve via the intensifier piston, the pin, and the finger; and wherein the transmission arrangement is arranged to mechanically transmit by physical contact an actuator force from the post to the control valve when the post begins to travel towards the extended stroke position, and hydraulically amplify the actuator stroke between the post and the control valve as the post continues to travel from the retracted stroke position to the extended stroke position.