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2. 发明公开

EP1778967A1 EINSPRITZDÜSE 有权
公开(公告)号：EP1778967A1
公开(公告)日：2007-05-02
申请号：EP04762760.9
申请日：2004-09-07
申请人： ROBERT BOSCH GMBH
发明人： BRENK, Achim , KROPP, Martin , BUCHER, Kilian , GREULICH, Dietmar , SCHNELL, Matthias , ZIPPERER, Elmar , TUERKER, Oezguer , KOCH, Reiner
IPC分类号： F02M45/08
CPC分类号： F02M63/0029 , F02M45/086 , F02M61/205 , F02M63/0005 , F02M2200/46
摘要： The invention relates to an injection nozzle (1) for an internal combustion engine, particularly in a motor vehicle. Said injection nozzle (1) comprises a first nozzle needle (2) for controlling at least one first injection port (5) and a second nozzle needle (3) for controlling at least one second injection port (15). A nozzle chamber (11) can be connected to a high pressure source (28) via a fuel supply line (27). The first nozzle needle (2) is provided with a first pressure stage (12) which is disposed in the nozzle chamber (11) and can be impinged upon therein by an injection pressure that applies an opening force acting in the opening direction (13) to the first nozzle needle (2). In order to improve closing of the first nozzle needle (2), a control chamber (38) is provided which can be connected to the high pressure source (28) via a control line (39). The first nozzle needle (2) encompasses a first control surface (41) which is located in the control chamber (38) and can be impinged upon therein by a control pressure that applies a closing force acting in the closing direction (7) to the first nozzle needle (2). The control line (39) is more severely throttled than the fuel supply line (27).
摘要翻译：用于内燃机的喷嘴（1）技术领域本发明涉及一种用于内燃机，特别是用于机动车辆的喷嘴（1）。所述喷嘴（1）包括用于控制至少一个第一喷射口（5）的第一喷嘴针（2）和用于控制至少一个第二喷射口（15）的第二喷嘴针（3）。喷嘴室（11）可以通过燃料供应管线（27）连接到高压源（28）。第一喷嘴针（2）设置有第一压力级（12），该第一压力级设置在喷嘴室（11）中并且能够通过施加沿打开方向（13）作用的打开力的喷射压力撞击在喷嘴室中，到第一喷嘴针（2）。为了改善第一喷嘴针（2）的关闭，设置了控制室（38），该控制室可以通过控制线（39）连接到高压源（28）。第一喷嘴针（2）包括第一控制表面（41），该第一控制表面位于控制室（38）中并且能够通过控制压力撞击其中，控制压力将作用在关闭方向（7）上的闭合力施加到第一喷嘴针（2）。控制管路（39）比燃料供应管路（27）受到更严重的节流。

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