Patent ID: 8459574

Claim:
A valve for the injection of fuel comprising a valve body with a recess in which a valve needle that is movable in the axial direction is arranged, said valve needle together with the valve body forming an injection nozzle in a downstream zone wherein the injection nozzle in a closed position prevents a stream of fuel from passing through the injection nozzle, wherein the valve body has a conical portion defining a conical inner surface that is tapered with respect to a longitudinal axis of the valve needle by a setting angle, wherein said valve needle comprises a closing body including: a first conical portion having an outer surface defining a first conical outer surface being tapered with respect to the longitudinal axis by an angle less than the setting angle of the conical inner surface of the valve body, and a second conical portion having an outer surface defining a second conical outer surface being tapered with respect to the longitudinal axis by an angle greater than the setting angle of the conical inner surface of the valve body, wherein a transition between the first and second conical outer surfaces of the valve needle closing body defines a valve seat configured to contact the inner conical surface of the valve body in a closing position of the closing body, wherein a fuel communicating gap downstream of the valve seat is defined between the first conical outer surface of the closing body and the conical inner surface of the valve body, the first conical outer surface and the conical inner surface extending from the valve seat in the downstream direction, wherein a deflecting element is formed at a downstream end of either the first conical outer surface of the closing body or the conical inner surface of the valve body, the deflecting element extending from said first outer surface of the closing body or said conical inner surface of the valve body into an area of the stream of fuel so arranged that a stream of fuel is deflected, wherein the deflecting element has a shape corresponding to an artificial deposit of residue or carbonization, and the geometry of the deflecting element creating a high flow rate against the deflecting element, thus reducing actual deposit of residue or carbonization in the area of the deflecting element.