发明授权
EP1387939B1 KRAFTSTOFFEINSPRITZVENTIL FÜR BRENNKRAFTMASCHINEN 有权
KRAFTSTOFFEINSPRITZVENTILFÜRBRENNKRAFTMASCHINEN

  • 专利标题: KRAFTSTOFFEINSPRITZVENTIL FÜR BRENNKRAFTMASCHINEN
  • 专利标题(英): Fuel injection valve for internal combustion engines
  • 专利标题(中): KRAFTSTOFFEINSPRITZVENTILFÜRBRENNKRAFTMASCHINEN
  • 申请号: EP02726069.4
    申请日: 2002-03-22
  • 公开(公告)号: EP1387939B1
    公开(公告)日: 2008-01-16
  • 发明人: BOEHLAND, PeterKANNE, SebastianNENTWIG, Godehard
  • 申请人: ROBERT BOSCH GMBH
  • 申请人地址: Postfach 30 02 20 70442 Stuttgart DE
  • 专利权人: ROBERT BOSCH GMBH
  • 当前专利权人: ROBERT BOSCH GMBH
  • 当前专利权人地址: Postfach 30 02 20 70442 Stuttgart DE
  • 优先权: DE10122241 20010508
  • 国际公布: WO2002090754 20021114
  • 主分类号: F02M47/02
  • IPC分类号: F02M47/02 F02M45/08
KRAFTSTOFFEINSPRITZVENTIL FÜR BRENNKRAFTMASCHINEN
摘要:
The invention relates to a fuel injection valve for internal combustion engines, comprising a housing (1), in which a piston-shaped outer valve needle (10) is arranged in a longitudinally displaceable manner in a bore (3). Said valve needle cooperates with a valve seat (13) configured on the end of the bore (3) located on the combustion chamber side in order to control at least one injection port (7). A control chamber (24) is configured in the housing (1), wherein pressure in the control chamber (24) can be regulated by a valve (33). As a result of the pressure in the control chamber (24), a closing force is exerted at least indirectly upon the outer valve needle (10) in the direction of the valve seat (13). At least one pressure surface (9; 101) is configured in the outer valve needle (10). An inner valve needle (12) is guided in the outer valve needle (10), which controls at least one additional injection port (7) on the valve seat (13) and which is impinged upon by the pressure in the control chamber (24) at least indirectly in the direction of the valve seat (13).
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