EP1431569A3 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP1431569A3
EP1431569A3 EP03015166A EP03015166A EP1431569A3 EP 1431569 A3 EP1431569 A3 EP 1431569A3 EP 03015166 A EP03015166 A EP 03015166A EP 03015166 A EP03015166 A EP 03015166A EP 1431569 A3 EP1431569 A3 EP 1431569A3
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
fuel injector
fuel
valve needle
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
EP03015166A
Other languages
German (de)
French (fr)
Other versions
EP1431569A2 (en
EP1431569B1 (en
Inventor
Friedrich Boecking
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 EP1431569A2 publication Critical patent/EP1431569A2/en
Publication of EP1431569A3 publication Critical patent/EP1431569A3/en
Application granted granted Critical
Publication of EP1431569B1 publication Critical patent/EP1431569B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/166—Selection of particular materials

Abstract

Ein Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine, weist einen piezoelektrischen, elektrostriktiven oder magnetostrikiven Aktor (4) und eine mit dem Aktor (4) in Wirkverbindung stehende Ventilnadel (3) mit einem Ventilschließkörper auf, der mit einer Ventilsitzfläche zu einem Dichtsitz zusammenwirkt. Der Aktor (4) ist mittel- oder unmittelbar mit einem ersten Ende (12) beweglich gelagert und wirkt mit dem anderen, zweiten Ende (13) auf die Ventilnadel 3 ein. Das zweite Ende (13) des Aktors (4) ist mittel- oder unmittelbar durch eine elastische und flexible Membran (8) axial geführt.

Figure 00000001
A fuel injection valve (1), in particular for the direct injection of fuel into a combustion chamber of an internal combustion engine, has a piezoelectric, electrostrictive or magnetostrictive actuator (4) and a valve needle (3) operatively connected to the actuator (4) with a valve closing body which cooperates with a valve seat surface to a sealing seat. The actuator (4) is mounted so as to be movable in the middle or directly with a first end (12) and acts on the valve needle 3 with the other, second end (13). The second end (13) of the actuator (4) is guided axially or indirectly by an elastic and flexible membrane (8).
Figure 00000001
EP20030015166 2002-12-19 2003-07-04 Fuel injector Expired - Lifetime EP1431569B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10259800 2002-12-19
DE2002159800 DE10259800A1 (en) 2002-12-19 2002-12-19 Fuel injector

Publications (3)

Publication Number Publication Date
EP1431569A2 EP1431569A2 (en) 2004-06-23
EP1431569A3 true EP1431569A3 (en) 2005-11-30
EP1431569B1 EP1431569B1 (en) 2009-09-23

Family

ID=32336492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030015166 Expired - Lifetime EP1431569B1 (en) 2002-12-19 2003-07-04 Fuel injector

Country Status (2)

Country Link
EP (1) EP1431569B1 (en)
DE (2) DE10259800A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219646A1 (en) * 2015-10-09 2017-04-13 Continental Automotive Gmbh Fluid injection device for internal combustion engines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (en) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE
DE19928916A1 (en) * 1999-06-24 2000-12-28 Bosch Gmbh Robert Fuel injection valve, especially for internal combustion engine, has elastically deformable, strip-shaped sealing element joined to sealing body and valve housing by peripheral weld seams
EP1170500A1 (en) * 2000-07-03 2002-01-09 Med S.p.A. Fuel injection valve for internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005455A1 (en) * 1989-02-28 1990-08-30 Volkswagen Ag Dosing valve for vehicle IC engine fuel injection - has piezoelectric actuator and spring membrane seal for closing force
DE19708304C2 (en) 1997-02-28 1999-09-30 Siemens Ag Movement transmission device and injection valve with a movement transmission device
DE10046661A1 (en) * 2000-09-20 2002-04-04 Bosch Gmbh Robert Piezoactuator e.g. for fuel injector of IC engine, has piezoelement clamped between head and foot parts, and casing attached securely to foot part in sealed manner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (en) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE
DE19928916A1 (en) * 1999-06-24 2000-12-28 Bosch Gmbh Robert Fuel injection valve, especially for internal combustion engine, has elastically deformable, strip-shaped sealing element joined to sealing body and valve housing by peripheral weld seams
EP1170500A1 (en) * 2000-07-03 2002-01-09 Med S.p.A. Fuel injection valve for internal combustion engines

Also Published As

Publication number Publication date
DE10259800A1 (en) 2004-07-01
EP1431569A2 (en) 2004-06-23
DE50311942D1 (en) 2009-11-05
EP1431569B1 (en) 2009-09-23

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