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1. 发明申请

WO1987000889A1 FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES 审中-公开
标题翻译：燃油喷射喷嘴用于内燃机
公开(公告)号：WO1987000889A1
公开(公告)日：1987-02-12
申请号：PCT/DE1986000159
申请日：1986-04-11
申请人： ROBERT BOSCH GMBH , BANZHAF, Werner , EBLEN, Ewald , FABER, Heinrich , GIERSCH, Rolf, Jürgen , HOFMANN, Karl , LIEDTKE, Dieter , NORBERG, Helmut
发明人： ROBERT BOSCH GMBH
IPC分类号： F02M61/16
CPC分类号： F02M61/18 , F02M61/166 , F02M61/168 , Y10T29/49306 , Y10T29/49432
摘要： Fuel injection nozzle for internal combustion engines with a tapered valve seat surface (16 or 16a) located in an end-cup (20 or 20a) of the nozzle body (10), in which at least one spray orifice (22) is provided. The outer wall region (30 or 44) of the end-cup (20 or 20a) which lies opposite the valve seating surface (16 or 16a) is of a lesser hardness than that of the inner wall region (18 or 18a) which forms the valve seating surface (16 or 16a). If the spray orifice (22) emerges from a blind hole (32), the outer wall region (40) of the end cup (20a) which surrounds the blind hole (32) should preferably also have a lesser hardness than that of the opposed inner wall region (42). The central wall region (28 or 28a) which lies between these should preferably have an even lesser hardness than that of the outer wall region (30 or 40, 44). In this way it is ensured that the end cup (20 or 20a) of the nozzle body (10 or 10a) can be provided altogether with a greater strength than with a known design, without the valve seat surface losing any of its heardness and without any marked decrease in the protection afforded to the outer wall region (30 or 40, 44) of the end cup (20 or 20a) against abrasive wear and tear.
摘要翻译：用于内燃机的燃料喷射喷嘴，其具有位于喷嘴体（10）的端杯（20或20a）中的锥形阀座表面（16或16a），其中设置有至少一个喷孔（22）。与阀座表面（16或16a）相对的端杯（20或20a）的外壁区域（30或44）的硬度比形成的内壁区域（18或18a）的硬度小阀座表面（16或16a）。如果喷孔（22）从盲孔（32）露出，则围绕盲孔（32）的端杯（20a）的外壁区域（40）的硬度应优选小于相对的内壁区域（42）。位于它们之间的中心壁区域（28或28a）优选地具有比外壁区域（30或40,44）的硬度更小的硬度。以这种方式，确保喷嘴体（10或10a）的端杯（20或20a）可以以比已知设计更强的强度来提供，而不会使阀座表面失去其任何的听觉和没有对端盖（20或20a）的外壁区域（30或40,44）的保护的任何明显的减小都不会磨损和磨损。

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