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    Injection Nozzle
    3.
    发明公开
    Injection Nozzle 审中-公开
    Einspritzdüse

    公开(公告)号：EP2239452A1

    公开(公告)日：2010-10-13

    申请号：EP09156674.5

    申请日：2009-03-30

    Applicant: Delphi Technologies Holding S.à.r.l.

    Inventor： Lambert, Malcolm ,  Walker, Keith

    IPC: F02M61/16 ,  F02M61/18

    CPC classification number: F02M61/18 ,  F02M61/16 ,  F02M61/1866 ,  F02M61/1873

    Abstract: An injection nozzle (20) for an internal combustion engine comprises a nozzle body (22) provided with a bore (24) within which a valve needle (23) is movable along a primary valve needle axis (A-A), the valve needle (23) being engageable with a valve seating (25) defined by the bore (24) to control fuel delivery through a nozzle outlet, and including a first region (36), a second region (38) and a seating region (33) defined by a transition between the first and second regions (36, 38) which seats against the valve seating (25) when the injection nozzle (20) is in a non-injecting state. A relieved region (40) is disposed upstream of the seating region (33), the relieved region (40) and one of the valve seating (25) and the first region (36) defining an anti-cavitation volume (50) therebetween when the injection nozzle (20) is in the non-injecting state. The valve needle (23) and the valve seating (25) together define a restriction (47) upstream of the relieved region (40) for restricting the flow of fuel into and out of the anti-cavitation volume (50) when the injection nozzle (20) is in the non-injecting state in order to reduce pressure wave activity upstream of the seating region (33).

    Abstract translation: 一种用于内燃机的喷嘴（20）包括：喷嘴体（22），设有孔（24），阀针（23）可沿主阀针轴（AA）移动，阀针（23） ）可与由孔（24）限定的阀座（25）接合以控制通过喷嘴出口的燃料输送，并且包括第一区域（36），第二区域（38）和由 当所述喷嘴（20）处于非喷射状态时，所述第一和第二区域（36,38）之间的过渡位置抵靠所述阀座（25）。 释放区域（40）设置在就座区域（33）的上游，释放区域（40）和阀座（25）中的一个和第一区域（36）之间限定了防空气体积（50） 注射喷嘴（20）处于非注射状态。 阀针（23）和阀座（25）一起在释放区域（40）的上游限定了限制（47），用于当喷射喷嘴（50）喷射时，限制燃料进入和离开防气蚀体积（50） （20）处于非喷射状态，以便减少就座区域（33）上游的压力波动。

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