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    • 3. 发明专利
    • Device for preventing cavitation within injection pump
    • 用于防止注射泵中的空隙的装置
    • JPH11280597A
    • 1999-10-12
    • JP1412199
    • 1999-01-22
    • Semt Pielstickエス・ウ・エム・テ・ピエルステイツク
    • ZYCH EDMOND
    • F02M55/00F02M55/02F02M59/44F02M59/46F02M63/00
    • F02M55/001F02M2200/04F02M2200/40
    • PROBLEM TO BE SOLVED: To remove cavitation which occurs after an injection stage is terminated within a surplus fuel return orifice of a compression chamber of a fuel injection pump of an internal combustion engine. SOLUTION: An injection pump 4 is a device which is connected with a feed duct 2 including a first check valve 3 having low waterhead loss capable of making fuel attain a compression chamber 4k firstly and is connected with a surplus fuel return duct 5 secondly. The return duct 5 includes a second check valve 6 rated so as to raise pressure within a return orifice 4b of the injection pump 4 and a two port valve 7 which normally opens and closes when pressure which is larger than pressure applied within the feed duct on the upstream side of the first check valve 3 is generated within the return orifice 4b, in parallel and in the vicinity of the return orifice 4b of the injection pump 4.
    • 要解决的问题:为了消除在内燃机的燃料喷射泵的压缩室的多余的燃料返回孔中终止喷射阶段之后发生的气蚀。 解决方案:喷射泵4是与进料管道2连接的装置,该进料管道2包括具有低水头损失的第一止回阀3,该第一止回阀3首先能够使燃料达到压缩室4k,并且二次连接到多余的燃料返回管道5。 返回管道5包括第二止回阀6,第二止回阀6被额定以提高注射泵4的返回孔4b内的压力;以及两端口阀7,当压力大于进给管道内施加的压力时,该阀门通常打开和关闭 第一止回阀3的上游侧在回流孔4b内平行地和在喷射泵4的返回孔4b附近产生。