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    • 1. 发明申请
    • Electronic unit injector with pressure assisted needle control
    • 带压力辅助针控制的电子单元注射器
    • US20050194462A1
    • 2005-09-08
    • US10792169
    • 2004-03-03
    • Dana ColdrenMingchun DongMichael Huffman
    • Dana ColdrenMingchun DongMichael Huffman
    • F02M47/02
    • F02M57/023F02M47/027F02M59/366F02M2547/008
    • An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The invention is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited.
    • 电子控制的燃料喷射器包括相对于类似的燃料喷射器的减少的部件数目和复杂性,而性能能力没有显着降低。 这是通过使用液压平衡的单件针并且通过设置在针控制室中的弹簧朝向关闭位置偏置来实现的。 虽然微妙,但是通过使用单独的电致动器调节针阀相对于针控制室的压力控制阀开口的相对定时,该喷射器具有一些能力来控制针阀打开和关闭时的燃料压力。 本发明特别适用于在喷射事件期间和之间分别在高压状态和低压状态下循环的燃料喷射器。 凸轮致动燃油喷射器特别适合。