Invention Grant
- Patent Title: Fuel injection valve for internal combustion engines
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Application No.: US14901552Application Date: 2014-06-18
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Publication No.: US09719471B2Publication Date: 2017-08-01
- Inventor: Andreas Ohm , Christian Wehr , Christian Kanka
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Michael Best & Friedrich LLP
- Priority: DE102013212269 20130626
- International Application: PCT/EP2014/062893 WO 20140618
- International Announcement: WO2014/206851 WO 20141231
- Main IPC: F02M47/02
- IPC: F02M47/02 ; F02M61/10 ; F02M61/20

Abstract:
The invention relates to a fuel injection valve, comprising a nozzle body (1) and a pressure chamber (3) formed therein, wherein the pressure chamber (3) can be filled with fuel under high pressure and wherein a piston-shaped nozzle needle (5) is arranged in the pressure chamber so as to be movable longitudinally, which nozzle needle interacts with a nozzle seat (7) formed in the nozzle body (1) by means of a sealing surface (6) formed at the end of the nozzle needle on the combustion chamber side and thereby controls the flow of fuel from the pressure chamber (3) to at least one injection opening (8). A sleeve (12) accommodates the end of the nozzle needle (5) facing away from the nozzle seat and bounds a control chamber (20). By means of the pressure of the control chamber, a hydraulic force is applied to the nozzle needle (5) in the direction of the nozzle seat (7). A closing spring (16) is arranged in the control chamber (20). The closing spring is arranged between the sleeve (12) and the nozzle needle (5) under compressive preload.
Public/Granted literature
- US20160230721A1 FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES Public/Granted day:2016-08-11
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