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    • 59. 发明专利
    • Fuel injection valve and internal combustion engine
    • 燃油喷射阀和内燃机
    • JP2009174481A
    • 2009-08-06
    • JP2008015753
    • 2008-01-28
    • Hitachi Ltd株式会社日立製作所
    • ABE MOTOYUKIYONEDA YUKIKOISHIKAWA TORUKOWATARI TAKEHIKOMAEKAWA NORIYUKI
    • F02M47/00F02M47/02F02M51/06F02M61/10
    • F02M69/046F02M57/026F02M61/10F02M61/16
    • PROBLEM TO BE SOLVED: To provide a simply structured fuel-injection valve for increasing injection pressure through the use of fuel as hydraulic oil.
      SOLUTION: A pressure intensifier is provided with a pressurization piston 106, a first fuel chamber 107 communicating with a fuel inlet path 101 of a fuel supply path, and a pressurization chamber 111 for pressurizing the fuel. The pressurization chamber 111 is structured inside a valve element 110. The pressurization piston 106 is provided so as to be displaceable relatively to the valve element 110. A first pressure-receiving face 106a facing to the inside of the first fuel chamber 107 is formed in one end in the drive-shaft direction 106d of the pressurization piston 106; in the other end of the pressurization piston part 106, a pressure-intensifying piston part 106b is provided which faces the inside of the pressurization chamber 111 in a smaller area than that of the first pressure-receiving face 106a, and varies the capacity of the pressurization chamber 111.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种简单结构化的燃料喷射阀,用于通过使用燃料作为液压油来增加喷射压力。 解决方案:增压器设置有加压活塞106,与燃料供给路径的燃料入口路径101连通的第一燃料室107和用于对燃料加压的加压室111。 加压室111被构造在阀元件110的内部。加压活塞106设置成相对于阀元件110可移动。面向第一燃料室107的内部的第一受压面106a形成为 加压活塞106的驱动轴方向106d的一端; 在加压活塞部106的另一端设置增压活塞部106b,该增压活塞部106b的面积比第一受压面106a的面积小, 加压室111.版权所有(C)2009,JPO&INPIT