Fuel injection nozzle
AssigneeMAN B&W Diesel Aktiengesellschaft
InventorsDirk Kothen, Gertrud Meggenrieder, Dietmar Pinkernell, Andreas Stichnoth, Hakan Yalcin
Life of this patent
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Abstract
Disclosed is a fuel injection nozzle comprising a cooling duct (6) that is disposed in the final region of a housing (1), which faces the combustion chamber. In order to cool the zones that are subjected to high thermal stress, the cooling duct (6) is positioned closer to the bore (2) of the valve needle than to the external face of the housing (1) and is provided with a cross-sectional area that has a width corresponding to no more than the height which extends in the axial direction of the nozzle.
Claims6
1-5. (canceled)
A fuel injection nozzle comprising a housing, the housing comprising:
- a nozzle needle bore having a central axis and a needle seat;
- an outside surface radially spaced from the axis;
- and
- a cooling duct arranged around the bore, the cooling duct being closer to the bore than to the outside surface of the housing, the cooling duct having a cross-sectional area in a plane through the central axis, the cross-sectional area having a height in the axial direction and a width transverse to the axis, the width being less than the height.
The fuel injection nozzle of claim 1 wherein the duct extends axially as far as the needle seat.
Dependencies are inferred from the claim text.