EP2019198A3 - Injector - Google Patents

Injector Download PDF

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Publication number
EP2019198A3
EP2019198A3 EP08104410A EP08104410A EP2019198A3 EP 2019198 A3 EP2019198 A3 EP 2019198A3 EP 08104410 A EP08104410 A EP 08104410A EP 08104410 A EP08104410 A EP 08104410A EP 2019198 A3 EP2019198 A3 EP 2019198A3
Authority
EP
European Patent Office
Prior art keywords
chamber
valve
control
injector
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08104410A
Other languages
German (de)
French (fr)
Other versions
EP2019198A2 (en
EP2019198B1 (en
Inventor
Hans-Christoph Magel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2019198A2 publication Critical patent/EP2019198A2/en
Publication of EP2019198A3 publication Critical patent/EP2019198A3/en
Application granted granted Critical
Publication of EP2019198B1 publication Critical patent/EP2019198B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0047—Four-way valves or valves with more than four ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion

Abstract

Die Erfindung betrifft einen Injektor (1) zum Einspritzen von Kraftstoff in einen Brennraum einer Brennkraftmaschine, insbesondere Common-Rail-Injektor, mit einem in Abhängigkeit des Kraftstoffdruckes in einer Steuerkammer (8) zwischen einer Schließstellung und einer den Kraftstofffluss freigebenden Öffnungsstellung verstellbaren Ventilelement (10), und mit einem der Steuerkammer (8) zugeordneten Steuerventil (20), wobei in einer ersten Schaltstellung des Steuerventils (20) ein einen Hochdruckbereich mit der Ventilkammer verbindender Zulaufkanal (27) geöffnet ist und in einer zweiten Schaltstellung die Steuerkammer (8) über einen Ablaufdrosselkanal (26) mit einem Niederdruckbereich (6) des Injektors verbunden und der Zulaufkanal (27) gesperrt ist. Erfindungsgemäß ist vorgesehen, dass die Steuerkammer (8) über einen Rückfüllkanal (35) mit der Ventilkammer (29) verbunden ist, durch den in der ersten Schaltstellung des Steuerventils (20) der über den Zulaufkanal (27) in die Ventilkammer (29) strömende Kraftstoff weiter in die Steuerkammer (8) strömen kann.

Figure imgaf001
The invention relates to an injector (1) for injecting fuel into a combustion chamber of an internal combustion engine, in particular a common rail injector, with a valve element (10) which is adjustable as a function of the fuel pressure in a control chamber (8) between a closed position and an open position releasing the fuel flow ), and with a control valve (20) associated with the control chamber (8), wherein in a first switching position of the control valve (20) a high-pressure area with the valve chamber connecting inlet channel (27) is open and in a second switching position, the control chamber (8) an outlet throttle channel (26) connected to a low pressure region (6) of the injector and the inlet channel (27) is locked. According to the invention, it is provided that the control chamber (8) is connected to the valve chamber (29) via a backfilling channel (35) through which the first switching position of the control valve (20) flows through the inlet channel (27) into the valve chamber (29) Fuel can continue to flow into the control chamber (8).
Figure imgaf001
EP20080104410 2007-07-24 2008-06-13 Injector Not-in-force EP2019198B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710034318 DE102007034318A1 (en) 2007-07-24 2007-07-24 injector

Publications (3)

Publication Number Publication Date
EP2019198A2 EP2019198A2 (en) 2009-01-28
EP2019198A3 true EP2019198A3 (en) 2009-09-30
EP2019198B1 EP2019198B1 (en) 2014-04-16

Family

ID=39938437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080104410 Not-in-force EP2019198B1 (en) 2007-07-24 2008-06-13 Injector

Country Status (2)

Country Link
EP (1) EP2019198B1 (en)
DE (1) DE102007034318A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223259A1 (en) * 2012-12-14 2014-06-18 Robert Bosch Gmbh Fuel injection valve
DE102013206383A1 (en) * 2013-04-11 2014-10-16 Robert Bosch Gmbh Fuel injection valve for internal combustion engines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004856A1 (en) * 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector having injection curve shaping carried out by switchable throttling elements
WO2004048769A1 (en) * 2002-11-23 2004-06-10 Robert Bosch Gmbh Fuel injection device with a 3-way control valve for configuring the injection process
DE10335211A1 (en) * 2003-08-01 2005-02-17 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
DE102004015744A1 (en) * 2004-03-31 2005-10-13 Robert Bosch Gmbh Common rail injector
DE102005010453A1 (en) * 2005-03-08 2006-09-14 Robert Bosch Gmbh Fuel injection valve for internal combustion engines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10353169A1 (en) 2003-11-14 2005-06-16 Robert Bosch Gmbh Injector for injecting fuel into combustion chambers of internal combustion engines, in particular piezo-controlled common rail injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004856A1 (en) * 2001-06-29 2003-01-16 Robert Bosch Gmbh Fuel injector having injection curve shaping carried out by switchable throttling elements
WO2004048769A1 (en) * 2002-11-23 2004-06-10 Robert Bosch Gmbh Fuel injection device with a 3-way control valve for configuring the injection process
DE10335211A1 (en) * 2003-08-01 2005-02-17 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
DE102004015744A1 (en) * 2004-03-31 2005-10-13 Robert Bosch Gmbh Common rail injector
DE102005010453A1 (en) * 2005-03-08 2006-09-14 Robert Bosch Gmbh Fuel injection valve for internal combustion engines

Also Published As

Publication number Publication date
EP2019198A2 (en) 2009-01-28
EP2019198B1 (en) 2014-04-16
DE102007034318A1 (en) 2009-01-29

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