Delphi International Operations Luxembourg S.a.r.l.

Mervyn J Hackett

Andrew J Limmer

Anthony Thomas Harcombe

Mark S Graham

Mark S Harper

Stephen O Crossley

A needle for use in a needle valve, such as the needle valve of a fuel injector, comprises a tip section (), a first guide section () and a second guide section (). The tip section () has a needle tip. The first guide section () is remote from the needle tip. The second guide section comprises a tube, wherein the first guide section () and the tip section () are comprised in an integrated inner needle component () extending through the tube (). A method of manufacturing such a needle is also described.

Needle for needle valve

A fuel injector comprising a valve needle for controlling fuel injection through an injector outlet, a control chamber for receiving fuel and a three-way control valve that controls fuel pressure within the control chamber to control opening and closing movement of the valve needle to control fuel injection through the outlet. The three-way control valve controls communication between (a) a first passage and a second passage and (b) a third passage and the second passage, and includes a first housing provided with a guide bore for a control valve member, whereby movement of the control valve member is guided within the guide bore and a first valve seat, defined by a second housing, with which an end of the control valve member is engageable to control communication between the first and second passages. The first housing is a control valve housing and the second housing is an injector housing, the injector housing being provided with a guide bore for the valve needle or a part carried by the valve needle. The control valve also defines a second valve seat defined by the first housing with which the control valve member is engageable to control communication between the second and third flow passages, and an intermediate housing located between the first and second housings, wherein the second passage is defined within the intermediate housing.

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Suffolk, United Kingdom

Mervyn J Hackett