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    • 32. 发明申请
    • HIGH PRESSURE PIEZOELECTRIC FUEL INJECTOR
    • 高压压电式燃油喷射器
    • WO2012167211A2
    • 2012-12-06
    • PCT/US2012/040635
    • 2012-06-03
    • HARWOOD, Michael, R.
    • HARWOOD, Michael, R.
    • F02M51/06
    • F02M57/027F02M51/0603F02M59/464F02M61/08F02M69/041
    • Briefly, the present invention relates to a combined injector and fuel pump suitable for high pressure direct injection of heavy fuels into Diesel engines, in particular small light weight Diesel engines as may be used in small aircraft. The injector utilizes a piezoelectric actuator driving a piston assembly comprising an inlet reed check valve disposed thereon. The piston houses an injection needle valve component spring loaded against the piston on one end of the needle component and a valve seat on the other end of the needle component. Fuel enters an inlet port coupled to an inlet passage within the piston. Piezoelectric actuator contraction transfers fuel from the inlet passage through the reed valve to a pressurization chamber. Piezoelectric actuator expansion drives the piston to pressurize the fuel in the pressurization chamber, which forces open the needle valve and nozzle assembly, injecting a finely atomized mist of fuel into a cylinder. A poppet injection valve embodiment is described.
    • 简而言之,本发明涉及一种组合式喷射器和燃料泵,其适用于将重质燃料高压直接喷射到柴油发动机,特别是可用于小飞机的小型重量轻的柴油发动机中。 喷射器利用驱动活塞组件的压电致动器,该活塞组件包括设置在其上的入口簧片止回阀。 活塞装有一个注射针阀组件弹簧,该弹簧装在针部件的一端上的活塞上,以及在针部件另一端的阀座。 燃料进入联接到活塞内的入口通道的入口。 压电致动器收缩将燃料从入口通道经由簧片阀转移到加压室。 压电致动器膨胀驱动活塞对加压室中的燃料加压,这迫使打开针阀和喷嘴组件,将精细雾化的燃料雾喷​​射到气缸中。 描述了提动阀的实施例。