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    • 23. 发明申请
    • DUAL-CHANNEL PIEZOELECTRIC INJECTOR
    • 双通道压电注射器
    • US20150377197A1
    • 2015-12-31
    • US14235081
    • 2013-09-17
    • TIANJIN UNIVERSITY
    • Mingfa YAOYongzhi LIZunqing ZHENGLaihui TONGXiangyu ZHANG
    • F02M51/06
    • F02M51/0603F02D19/0694F02M21/0248F02M43/04F02M45/086F02M2200/46F02M2200/703Y02T10/36
    • The invention discloses a dual-channel piezoelectric injector, including a dual-channel injector body, its bottom in turn is connected with an upper intermediate, a lower intermediate and a dual-channel needle valve body. At the top of the dual-channel injector body there are two tubing interfaces, and each tubing interface has a tubing fuel duct. There are two laminated piezoelectric actuators and two spray fuel ducts connected to two tubing fuel ducts respectively inside the dual-channel injector body. The upper intermediate and lower intermediate connected with each other to form the middle connection body. From top to bottom of the middle connection body, there is an external control fuel duct, an external spray fuel duct, an internal control fuel duct and internal fuel spray duct. Inside the double-channel needle valve body, there is the sleeve structure of the needle valve hole, at the bottom of double-channel needle valve body there is an internal fuel spray nozzle connecting the internal casing hole which is outside the body, and an external fuel spray nozzle connecting to the external casing hole which is outside the body. Through the two laminated type piezoelectric actuators, control is realized for the pressure difference between the fuel pressure of the fuel control cavity and the fuel pressure of the inner pressure chamber or outer pressure chamber. So it is also realized to control the open or close state of the internal or external needle valve, in turn to control the injection action of the internal fuel spray nozzle or external fuel spray nozzle. The present invention has a simple structure and a low manufacturing cost.
    • 本发明公开了一种双通道压电注射器,包括双通道注射器主体,其底部依次与上中间体,下中间体和双通道针阀体连接。 在双通道喷射器主体的顶部有两个油管接口,每个油管接口都有管道燃油管道。 两个层压压电致动器和两个喷射燃料管道分别连接到双通道喷射器主体内的两个燃油管道。 上部中间和下部中间相互连接形成中间连接体。 从中间连接体的顶部到底部,有外部控制燃料管道,外部喷射燃料管道,内部控制燃料管道和内部燃料喷射管道。 在双通道针阀体内部,有针阀孔的套筒结构,在双通道针阀体的底部有一个内部燃料喷嘴,连接机体外部的内壳孔, 外部燃料喷嘴连接到外部外壳外壳孔。 通过这两个层压型压电致动器,实现燃料控制腔的燃料压力与内部压力室或外部压力室的燃料压力之间的压力差的控制。 因此,也可以实现控制内部或外部针阀的打开或关闭状态,从而控制内部燃料喷嘴或外部燃料喷嘴的喷射动作。 本发明的结构简单,制造成本低。
    • 25. 发明申请
    • FUEL SUPPLY SYSTEM AND METHOD OF SUPPLYING FUEL TO ENGINE
    • 燃油供应系统及燃油供应方式
    • US20150354514A1
    • 2015-12-10
    • US14298091
    • 2014-06-06
    • Caterpillar Inc.
    • Toby Perry
    • F02M37/12
    • F02M37/12F02D19/0647F02D19/0684F02M43/00F02M43/04F02M55/02Y02T10/36
    • A fuel supply system for an engine is disclosed. The fuel supply system includes a fuel pump defining a fuel chamber and a hydraulic chamber. The fuel chamber is in fluid communication with a fuel source and the hydraulic chamber is in fluid communication with a hydraulic pump that supplies a pressurized hydraulic fluid. In a suction stroke of a fuel piston in the fuel chamber, a valve system provides a first portion of hydraulic fluid to hydraulic chamber to drive the fuel piston in a first direction and provides a second portion of hydraulic fluid to the accumulator. In a compression stroke, the valve system provides hydraulic fluid to hydraulic chamber to drive the fuel piston in a second direction. Further, the accumulator releases the stored fluid to hydraulic chamber to drive the fuel piston in the second direction.
    • 公开了一种用于发动机的燃料供应系统。 燃料供给系统包括限定燃料室和液压室的燃料泵。 燃料室与燃料源流体连通,并且液压室与供应加压液压流体的液压泵流体连通。 在燃料室中的燃料活塞的吸入冲程中,阀系统将液压流体的第一部分提供给液压室,以在第一方向上驱动燃料活塞,并将第二部分液压流体提供给蓄能器。 在压缩行程中,阀系统向液压室提供液压流体以沿第二方向驱动燃料活塞。 此外,蓄能器将存储的流体释放到液压室,以沿第二方向驱动燃料活塞。