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1. (WO2018167087) VALVE NEEDLE

Pub. No.:    WO/2018/167087    International Application No.:    PCT/EP2018/056283
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Wed Mar 14 00:59:59 CET 2018
IPC: F02M 61/16
F02D 19/06
Applicants: A. P. MØLLER - MAERSK A/S
Inventors: REEVE, Tim
Disclosed is a valve needle (222, 322) for a needle valve (220) of a slurry fuel injector valve (200), the valve needle comprising: a tip (222a) for abutting a needle valve seat (221) of the needle valve; a sealing portion (222c) for location in a bore (223) of the needle valve; and a fuel chamber portion (222b, 322b) between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber (224) of the needle valve; wherein a surface of the sealing portion of the valve needle comprises at least one groove (225a, 225b, 325a, 325b) 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.