Invention Grant
- Patent Title: Fuel injection valve for internal combustion engines
- Patent Title (中): 内燃机燃油喷射阀
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Application No.: US10474681Application Date: 2003-01-27
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Publication No.: US07051958B2Publication Date: 2006-05-30
- Inventor: Detlev Potz, deceased
- Applicant: Maike Sander-Potz, legal representative , Wendelin Potz, legal representative , Peter Boehland , Thomas Kuegler , Andreas Koeninger , Predrag Nunic
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agent Ronald E. Greigg
- Priority: DE10205970 20020214
- International Application: PCT/DE03/00210 WO 20030127
- International Announcement: WO03/069151 WO 20030821
- Main IPC: F02M56/00
- IPC: F02M56/00 ; F02M61/00 ; F02M63/00

Abstract:
A fuel injection valve for internal combustion engines, having a housing in which an outer valve needle and an inner valve needle guided in it are disposed in a bore. The outer valve needle controls an outer row of injection openings, and the inner valve needle controls an inner row of injection openings, to which rows of injection openings fuel is delivered at an injection pressure through a high-pressure conduit embodied in the housing. A control pressure chamber in the housing can be made to communicate with the high-pressure conduit, and by means of its pressure, a closing force is exerted at least indirectly on the inner valve needle. The high-pressure conduit communicates with a control chamber, by whose pressure a closing force is exerted at least indirectly on the outer valve needle, and the control chamber communicates with the control pressure chamber. A control valve is disposed in a housing, and by means of the control valve, the control chamber can be made to communicate with a leak fuel chamber.
Public/Granted literature
- US20040129804A1 Fuel injection valve for internal combustion engines Public/Granted day:2004-07-08
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