Fuel injection pump
    1.
    发明授权
    Fuel injection pump 失效
    燃油喷射泵

    公开(公告)号:US5243943A

    公开(公告)日:1993-09-14

    申请号:US867109

    申请日:1992-08-18

    IPC分类号: F02D1/18 F02M41/12

    摘要: A distributor-type fuel injection pump is provided with a hydraulic injection adjusting mechanism whose injection adjusting piston adjusts the cam gear unit for driving the pump plunger to execute strokes corresponding to the desired position of the start of injection. The injection adjusting piston defines a control space on one side and a spring space receiving a return spring on the other side. The control space is connected via a throttle bore with the pump interior space which is filled with fuel by a delivery pump. The fuel pressure is adjusted by a pressure control valve. To prevent unstable pressure vibrations on the injection adjusting piston, which leads to defects in the operation of the fuel injection pump, the spring space is connected on one side with the suction side of the delivery pump via a first throttle and on the other side with the pressure side of the delivery pump via a second throttle having a smaller throttle cross section.

    摘要翻译: PCT No.PCT / DE90 / 00908 Sec。 371日期:1992年8月18日 102(e)日期1992年8月18日PCT 1990年11月24日PCT PCT。 WO91 / 10056 PCT公开号 1991年7月11日,分配式燃油喷射泵设有液压喷射调节机构,其喷射调节活塞调节用于驱动泵柱塞的凸轮齿轮单元,以执行对应于注射开始期望位置的冲程。 注射调节活塞在一侧限定一个控制空间,另一侧限定弹簧空间,该弹簧空间容纳复位弹簧。 控制空间通过节流孔与泵内部空间连接,泵内部空间由输送泵填充燃料。 燃油压力由压力控制阀调节。 为了防止喷射调节活塞上的不稳定的压力振动,这导致燃料喷射泵的操作的缺陷,弹簧空间通过第一节气门在一侧与输送泵的吸力侧连接,另一侧与 输送泵的压力侧经由具有较小节流横截面的第二节流阀。