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1. 发明授权

US5267694A Fuel injection nozzle for internal combustion engines 失效
标题翻译：内燃机燃油喷嘴
公开(公告)号：US5267694A
公开(公告)日：1993-12-07
申请号：US795156
申请日：1991-11-20
申请人： Willi Frank , Klaus Dahlmeier , Karl Hoffmann
发明人： Willi Frank , Klaus Dahlmeier , Karl Hoffmann
IPC分类号： F02M45/08 , B05B1/30 , F02M61/04
CPC分类号： F02M45/083
摘要： A fuel injection nozzle for internal combustion engines having a nozzle body secured on a nozzle holder, and a valve needle that is axially displaceable in the nozzle holder, the valve needle being raised from a valve seat for fuel injection by the fuel pressure, counter to a closing spring assembly of first and second helical compression springs disposed in series. The total stroke of the valve needle is divided into a prestroke and a remaining stroke. To attain an injection nozzle having the smallest possible outside diameter, the spring chamber receiving the closing springs comprises a blind bore of substantially constant diameter, on a bottom of which the first closing spring is supported. To support the second closing spring, a pressure shoulder part in the form of a ring is inserted into the blind bore; the pressure shoulder part is fixed by deformation of contacting parts of the wall of the nozzle holder. Recesses are machined into the circumference of the pressure shoulder part and for easier deformation of portions of the wall of the nozzle holder in the region of the pressure shoulder part, recesses are machined into the outer wall of the pressure shoulder part, with a portion of the wall of the nozzle holder forming the bottom being deformed to form a form-fitting connection with the recesses of the pressure shoulder part.
摘要翻译：一种用于内燃机的燃料喷射嘴，其具有固定在喷嘴保持架上的喷嘴体，以及在喷嘴保持架中可轴向移动的阀针，阀针从燃料压力燃料喷射的阀座升起，与串联设置的第一和第二螺旋压缩弹簧的闭合弹簧组件。阀针的总冲程分为前冲程和剩余冲程。为了获得具有尽可能小的外径的喷嘴，接收封闭弹簧的弹簧室包括基本恒定直径的盲孔，其底部支撑有第一闭合弹簧。为了支撑第二闭合弹簧，将环形形式的压力肩部插入盲孔中; 压力肩部通过喷嘴座的壁的接触部分的变形来固定。凹槽被加工到压力肩部的圆周中并且为了更容易地在压力肩部的区域中使喷嘴保持器的壁的部分变形，凹部被加工到压力肩部的外壁中，一部分形成底部的喷嘴座的壁变形，以形成与压力肩部的凹部的形状配合连接。

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