Valve needle
AssigneeA.P. Møller—Mærsk A/S
InventorTim Reeve
Life of this patent
Estimating the term…
Abstract
Disclosed is a valve needle for a needle valve of a slurry fuel injector valve, the valve needle comprising: a tip for abutting a needle valve seat of the needle valve; a sealing portion for location in a bore of the needle valve; and a fuel chamber portion between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber of the needle valve; wherein a surface of the sealing portion of the valve needle comprises at least one groove and wherein at least part of the or each groove extends in a direction that is non-perpendicular to an axial direction of the valve needle.
Claims16
A valve needle for a needle valve of a slurry fuel injector valve, the valve needle comprising:
- a tip for abutting a needle valve seat of the needle valve;
- a sealing portion for location in a bore of the needle valve;
- and
- a fuel chamber portion between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber of the needle valve;
- wherein a surface of the sealing portion of the valve needle comprises at least one groove, and wherein at least a part of the at least one groove extends in a direction that is non-perpendicular to an axial direction of the valve needle;
- wherein said at least a part of the at least one groove is helical;
- and
- wherein the at least one groove has a first groove portion and a second groove portion located between the first groove portion and the fuel chamber portion of the valve needle, and wherein a pitch of the second groove portion is different from a pitch of the first groove portion.
A needle valve for a slurry fuel injector valve, the needle valve comprising:
- a bore;
- a needle fuel chamber;
- and
- a valve needle that is moveable in the bore to protrude from within the bore into the needle fuel chamber to a variable extent;
- and
- a fluid conduit that opens into the bore at a fluid conduit outlet;
- wherein the valve needle has a sealing portion that is within the bore and outside of the needle fuel chamber, wherein a surface of the sealing portion comprises at least one groove, and wherein at least part of the at least one groove extends in a direction that is non-perpendicular to an axial direction of the valve needle;
- wherein the valve needle is rotatable relative to the bore;
- and
- wherein the fluid conduit outlet is arranged relative to the valve needle so that fluid is expellable from the fluid conduit outlet and into said part of the at least one groove to encourage rotation of the valve needle in the bore.
Dependencies are inferred from the claim text.