Patent ID: 9476379
Filing Date: 2016-10-25
CPC Classification: F02D,F02M

Claim Text:
1. An injection unit for injection of a first fuel and a second fuel in a combustion space, the injection unit comprising: at least one first internal fuel space for receiving the first fuel from a first fuel source in which the first fuel source is at a higher positive pressure, at least one second internal fuel space for receiving the second fuel from a second fuel source in which the second fuel source is at a lower pressure than the first fuel in the first fuel source; an actuator movable between a first position and a second position, in the second position, the actuator being configured and operable to initiate injecting at least the second fuel in the combustion space, and an injection nozzle so connected and so configured and operable to inject at least the second fuel in the combustion space; a control unit controlling the actuator; a pressure boosting device configured and operable to apply the pressure of the first fuel source to increase the pressure of the second fuel to a higher level than the pressure in the second fuel source by means of the pressure of the first fuel, helm the se and fuel is injected into the combustion space by the injection nozzle; and a fuel passage configured and operable to lead the first fuel from the first fuel source tai the at least one first internal fuel space, and the actuator, is configured and operable to selectively close the fuel passage at times when the second fuel is not to he pressurized by the first fuel, and to open the fuel passage at times when the second fuel is to be pressurized by the first fuel, wherein the actuator is configured and operable to be moveable in a recess which extends transversely through part of the fuel passage, and the actuator is configured and operable to close the fuel passage when the actuator is in first position and open the fuel passage when the actuator is in the second position.