Patent ID: 9605639
Date: 2017-03-28
CPC Classifications: F02D,F02M

Claim:
1. A fuel injector for an internal combustion engine, comprising: a fuel supply channel including a nozzle opening; a nozzle valve including a valve stem, wherein the valve stem and an inner wall of the fuel supply channel form a first region having a first flow cross section and a second region having a second flow cross section that is greater than the first flow cross section; an actuator to actuate the nozzle valve; a stroke limiting device to limit a stroke travel of the nozzle valve to a part stroke, the stroke limiting device including a mechanical, electromechanical or electronic additional actuating device that exerts force independent of fuel pressure to adjust the nozzle valve; and code programmed into a computer readable storage medium in an electronic control system for controlling the additional actuating device to control a position range of the part stroke of the nozzle valve differently from a position range of a full stroke of the nozzle valve, wherein the second region continues up to a step formed in the inner wall of the fuel supply channel, wherein the first region extends from the step to the nozzle opening, and wherein a closing surface of the nozzle valve is positioned in the first region during the part stroke of the nozzle valve and in the second region during the full stroke of the nozzle valve.