发明授权
- 专利标题: HUBGESTEUERTES VENTIL ALS KRAFTSTOFF-ZUMESSEINRICHTUNG EINES EINSPRITZSYSTEMS FÜR BRENNKRAFTMASCHINEN
- 专利标题(英): Stroke-controlled valve as a fuel metering device of an injection system for internal combustion engines
- 专利标题(中): 用于内燃发动机的计量装置的行程阀燃油喷射系统
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申请号: EP01998729.6申请日: 2001-11-16
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公开(公告)号: EP1240424B1公开(公告)日: 2004-10-20
- 发明人: DUTT, Andreas
- 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: DE10059424 20001130
- 国际公布: WO2002044548 20020606
- 主分类号: F02M59/46
- IPC分类号: F02M59/46 ; F02M59/36 ; F02M53/00 ; F02M41/14
摘要:
The invention relates to a stroke-controlled valve which is used as a fuel metering device of an injection system for internal combustion engines. Said valve has a valve needle (11) which can be actuated axially against the resistance of a spring (24), which is arranged in a graduated, coaxial recess (13) in a valve body (10) and which interacts with a valve seat (17) which is configured in the recess (13) of the valve body (10), hereby controlling the fuel injection process. The valve also comprises a high-pressure area (18) which is connected to an allocated injection nozzle and which is located in front of the valve seat (17), a low-pressure area (28) which is located behind the valve seat and which opens out into the fuel return passage (30); and a low-pressure compensating piston (22) which coaxially adjoins the valve (16, 17) and which is solidly connected to the valve needle. The invention is characterised in that a first control edge (39 or 42) is configured on the low-pressure compensating piston (22). Said control edge interacts with a second control edge (40 or 43) on the valve body recess (13) in the area of the fuel return passage (45, 30) or (48, 30) in such a way that a throttle cross-section (38, 38a or 46, 44a) that is dependent on the valve stroke (41) is formed between the two control edges (39, 40 or 42, 43).
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