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    • 53. 发明授权
    • Fuel injection apparatus
    • 燃油喷射装置
    • US4069800A
    • 1978-01-24
    • US651855
    • 1976-01-23
    • Fumio KandaNobuhiro KaibaraSeibi OhkiKazuo OkamotoAkira Suzuki
    • Fumio KandaNobuhiro KaibaraSeibi OhkiKazuo OkamotoAkira Suzuki
    • F02M47/00F02M57/02F02M59/10F02M39/00
    • F02M57/026F02M57/025F02M59/105
    • A servo piston is driven to compress fuel in a pressure chamber which communicates with a needle valve which is spring biased to block communication between the pressure chamber and a fuel injection nozzle. When the fuel pressure exceeds a value equivalent to the preload of the spring, the pressurized fuel moves the needle valve off its seat so that fuel from the pressure chamber is injected into an engine through the injection nozzle. Further movement of the servo piston unblocks a port to allow fuel at supply pressure to act on the needle valve in the same direction as the spring to sharply seat the needle valve and cleanly terminate fuel injection. Further movement of the servo piston uncovers another port so that the pressure chamber is depressurized through connection with the supply and the needle valve is firmly held on its seat.
    • 伺服活塞被驱动以在与针阀连通的压力室中压缩燃料,所述针阀被弹簧偏置以阻止压力室和燃料喷射喷嘴之间的连通。 当燃料压力超过与弹簧的预压相当的值时,加压燃料将针阀从其阀座移开,使得来自压力室的燃料通过喷嘴喷射到发动机中。 伺服活塞的进一步运动解除了一个端口,允许供应压力下的燃料在与弹簧相同的方向上作用在针阀上,以锐利地安置针阀,并且清洁地终止燃油喷射。 伺服活塞的进一步运动揭开另一个端口,使得压力室通过与电源的连接而减压,并且针阀牢固地保持在其座上。