Solenoid actuated fuel injector having a pressure balanced pintle
    4.
    发明申请
    Solenoid actuated fuel injector having a pressure balanced pintle 有权
    具有压力平衡枢轴的电磁致动燃料喷射器

    公开(公告)号:US20070095954A1

    公开(公告)日:2007-05-03

    申请号:US11592025

    申请日:2006-11-02

    IPC分类号: F02M51/00

    摘要: A fuel injector for an internal combustion engine, the injector comprising an injector body having a tip portion defining at least one spray aperture; a pintle extending within the tip portion, the pintle having a head portion engageable with a valve seat to close the spray aperture, the pintle being axially moveable between a closed position wherein the head portion abuts the valve seat and an open position wherein the head portion is spaced from the valve seat; actuating means for selectively urging the pintle towards its open position; guide means being provided within the injector body guiding the pintle for axial movement between its closed and open positions; a fuel supply chamber being defined within the injector body between the spray aperture and the guide means, characterised in that the diameters of the guide means and valve seat are selected such that the pintle is substantially pressure balanced.

    摘要翻译: 一种用于内燃机的燃料喷射器,所述喷射器包括具有限定至少一个喷射孔的尖端部分的喷射器主体; 枢轴在尖端部分内延伸,枢轴具有可与阀座接合以封闭喷射孔的头部,枢轴可在关闭位置之间轴向移动,其中头部邻接阀座和打开位置,其中头部 与阀座间隔开; 驱动装置,用于选择性地将枢轴推向其打开位置; 引导装置设置在注射器主体内,引导枢栓在其关闭位置和打开位置之间轴向运动; 在所述喷射孔和所述引导装置之间的所述喷射器主体内限定燃料供给室,其特征在于,所述引导装置和阀座的直径被选择为使得所述枢轴基本上是压力平衡的。