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    • 8. 发明申请
    • INJECTION DEVICE FOR INTRODUCING A UREA SOLUTION INTO THE EXHAUST TRACT OF AN INTERNAL COMBUSTION ENGINE
    • 用于将尿素溶液引入内燃机的排气装置的注射装置
    • US20130214057A1
    • 2013-08-22
    • US13816310
    • 2011-07-19
    • Jochen DoehringWolfgang RipperJuergen HannekeGodehard Nentwig
    • Jochen DoehringWolfgang RipperJuergen HannekeGodehard Nentwig
    • F01N3/20
    • F02M47/025F01N3/20F01N3/206F01N3/2066F01N3/36F01N2610/1453F02M7/02F02M47/02F02M47/027F02M57/027Y02T10/24
    • The invention relates to an injection device (1), designed in particular for injecting fluid into an exhaust tract of an internal combustion engine, having a valve needle (14), an injection chamber (12) having at least one injection opening (44), and a control chamber (20). The injection device (1) is designed such that a pressure differential between the injection chamber (12) and the control chamber (20) brings about a displacement of the valve needle (14) between an open position in which a fluid flow through the injection opening (44) from the injection chamber (12) is released, and a closed position, in which the injection opening (44) is closed off. The injection chamber (22) and the control chamber (20) are hydraulically connected to an inlet (40, 42; 9), such that a pressure rise in the inlet (40, 42; 9) results in a pressure rise in the injection chamber (12), and a pressure rise in the control chamber (20) delayed in time relative to the pressure rise in the injection chamber (12), and said pressure differential brings about a displacement of the valve needle (14) from the closed position into an open position.
    • 本发明涉及一种特别设计用于将流体注入内燃机的排气道的注射装置(1),其具有阀针(14),具有至少一个注射开口(44)的注射室(12) ,和控制室(20)。 注射装置(1)被设计成使得注射室(12)和控制室(20)之间的压力差导致阀针(14)在打开位置之间的位移,在该位置中流体通过注射器 从注射室(12)的开口(44)被释放,并且关闭位置,其中注射开口(44)被关闭。 注入室(22)和控制室(20)液压连接到入口(40,42; 9),使得入口(40,42; 9)中的压力升高导致注射器中的压力上升 并且所述控制室(20)中的压力上升相对于所述注射室(12)中的压力上升而在时间上延迟,并且所述压力差引起所述阀针(14)从所述闭合位置 置于敞开的位置。