Invention Grant
- Patent Title: Fuel injection valve for internal combustion engines
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Application No.: US14411895Application Date: 2013-05-15
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Publication No.: US09777684B2Publication Date: 2017-10-03
- Inventor: Hans-Christoph Magel , Andreas Gruenberger
- 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: DE102012211239 20120629; DE102012220025 20121102
- International Application: PCT/EP2013/060078 WO 20130515
- International Announcement: WO2014/000957 WO 20140103
- Main IPC: F02M47/02
- IPC: F02M47/02 ; F02M63/00 ; F02M61/20

Abstract:
The invention relates to a fuel injection valve comprising a housing (1) in which pressure is applied to a nozzle needle (8), in a control chamber (28), at least indirectly with a closing force in the direction of a valve seat (10). The pressure in the control chamber (28) can be adjusted using a control valve (40) as said control chamber (28) is able to be connected to a low pressure chamber (46) via an outlet restrictor (31) and be filled with fuel at high pressure via an inlet restrictor (30). A longitudinally-displaceable control piston (29) is arranged in the control chamber (28) and divides said chamber (28) into a first control sub-chamber and a second control sub-chamber (228), the first control sub-chamber (128) being able to be connected to the low pressure chamber (46) by means of said outlet restrictor (31). A sealing surface (38) is formed on the control piston (29) and interacts with a sealing seat (39) in the control chamber (28) such that the inlet restrictor (30) is hydraulically disconnected from the second control sub-chamber (228) when the sealing surface (38) comes to rest against the sealing seat (39). Said first control sub-chamber (128) and second control sub-chamber (228) are constantly hydraulically interconnected by means of a restrictor connection (34).
Public/Granted literature
- US20150159607A1 FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES Public/Granted day:2015-06-11
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