EP2400144A3 - Fuel injector - Google Patents

Fuel injector Download PDF

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Publication number
EP2400144A3
EP2400144A3 EP11167030.3A EP11167030A EP2400144A3 EP 2400144 A3 EP2400144 A3 EP 2400144A3 EP 11167030 A EP11167030 A EP 11167030A EP 2400144 A3 EP2400144 A3 EP 2400144A3
Authority
EP
European Patent Office
Prior art keywords
closing element
switching valve
sealing
fuel injector
sealing piston
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.)
Withdrawn
Application number
EP11167030.3A
Other languages
German (de)
French (fr)
Other versions
EP2400144A2 (en
Inventor
Henning Kreschel
Andreas Rau
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 EP2400144A2 publication Critical patent/EP2400144A2/en
Publication of EP2400144A3 publication Critical patent/EP2400144A3/en
Withdrawn legal-status Critical Current

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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Die Erfindung betrifft einen Kraftstoffinjektor mit einem Gehäuseteil (1), in welches ein mittels eines Piezoaktors (2) betätigbares Schaltventil (3) mit einem hubbeweglichen Schließelement (4) aufgenommen ist, wobei das Schließelement (4) zur Ausbildung eines Schaltventilraums (5) und zur wenigstens teilweisen Aufnahme eines Dichtkolbens (6) hülsenförmig ausgebildet ist und eine erste Dichtkontur (7) besitzt, die mit einer am Dichtkolben (6) ausgebildeten zweiten Dichtkontur (8) als Ventilsitz zusammenwirkt.The invention relates to a fuel injector with a housing part (1), in which a by means of a piezoactuator (2) operable switching valve (3) with a liftable closing element (4) is received, wherein the closing element (4) for forming a switching valve chamber (5) and for at least partially receiving a sealing piston (6) is sleeve-shaped and has a first sealing contour (7) which cooperates with a on the sealing piston (6) formed second sealing contour (8) as a valve seat.

Erfindungsgemäß ist das hülsenförmige Schließelement (4) am Piezoaktor (2) über eine Lastverteilungsplatte (9) abgestützt, die mit dem Schließelement (4) einstückig verbunden ist, wobei das Schließelement (4) und/oder die Lastverteilungsplatte (9) einen ringförmigen Abschnitt (10) oder einen ringförmigen Füllkörper (11) zur Verringerung des Volumens des Schaltventilraums (5) und zur Ausbildung eines mit dem Dichtkolben (6) zusammenwirkenden Führungsdurchmessers (12) umfasst bzw. umfassen.

Figure imgaf001
According to the invention, the sleeve-shaped closing element (4) is supported on the piezoactuator (2) via a load distribution plate (9) which is integrally connected to the closing element (4), wherein the closing element (4) and / or the load distribution plate (9) has an annular section (9). 10) or an annular filling body (11) for reducing the volume of the switching valve chamber (5) and for forming a with the sealing piston (6) cooperating guide diameter (12) or comprise.
Figure imgaf001
EP11167030.3A 2010-06-23 2011-05-23 Fuel injector Withdrawn EP2400144A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010030401 DE102010030401A1 (en) 2010-06-23 2010-06-23 fuel injector

Publications (2)

Publication Number Publication Date
EP2400144A2 EP2400144A2 (en) 2011-12-28
EP2400144A3 true EP2400144A3 (en) 2014-07-30

Family

ID=44650544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11167030.3A Withdrawn EP2400144A3 (en) 2010-06-23 2011-05-23 Fuel injector

Country Status (2)

Country Link
EP (1) EP2400144A3 (en)
DE (1) DE102010030401A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916414A2 (en) * 2006-10-23 2008-04-30 Robert Bosch Gmbh Fuel injector with piezo actuator
DE102006055555A1 (en) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Fuel injector for internal combustion engine, has actuator mounted in low pressure area in housing part or retaining body and force-balanced under formation of piston stroke directly or indirectly on valve, where actuator has support
DE102006055548A1 (en) * 2006-11-24 2008-05-29 Robert Bosch Gmbh fuel injector
EP1944500A2 (en) * 2007-01-10 2008-07-16 Robert Bosch Gmbh Fuel injector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049831A1 (en) 2006-10-23 2008-04-24 Robert Bosch Gmbh Fuel injector for internal combustion engine, has actuator for actuating switching valve mounted in injector body, and control area that is pressure-loaded and loaded with fuel that stays under system pressure over high pressure inlet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916414A2 (en) * 2006-10-23 2008-04-30 Robert Bosch Gmbh Fuel injector with piezo actuator
DE102006055555A1 (en) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Fuel injector for internal combustion engine, has actuator mounted in low pressure area in housing part or retaining body and force-balanced under formation of piston stroke directly or indirectly on valve, where actuator has support
DE102006055548A1 (en) * 2006-11-24 2008-05-29 Robert Bosch Gmbh fuel injector
EP1944500A2 (en) * 2007-01-10 2008-07-16 Robert Bosch Gmbh Fuel injector

Also Published As

Publication number Publication date
DE102010030401A1 (en) 2011-12-29
EP2400144A2 (en) 2011-12-28

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