EP1382838A3 - Fuel injector - Google Patents

Fuel injector Download PDF

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Publication number
EP1382838A3
EP1382838A3 EP03012488A EP03012488A EP1382838A3 EP 1382838 A3 EP1382838 A3 EP 1382838A3 EP 03012488 A EP03012488 A EP 03012488A EP 03012488 A EP03012488 A EP 03012488A EP 1382838 A3 EP1382838 A3 EP 1382838A3
Authority
EP
European Patent Office
Prior art keywords
actuator
piston
operatively connected
pressure medium
reciprocating 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.)
Granted
Application number
EP03012488A
Other languages
German (de)
French (fr)
Other versions
EP1382838A2 (en
EP1382838B1 (en
Inventor
Walter Maeurer
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 EP1382838A2 publication Critical patent/EP1382838A2/en
Publication of EP1382838A3 publication Critical patent/EP1382838A3/en
Application granted granted Critical
Publication of EP1382838B1 publication Critical patent/EP1382838B1/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
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/16—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

Landscapes

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

Abstract

Ein Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine, weist einen piezoelektrischen, elektrostriktiven oder magnetostrikiven Aktor (4), einen mit dem Aktor (4) in Wirkverbindung stehenden Aktorkolben (9), der mit einem ersten Führungsspalt (28) geführt ist, einen mit dem Aktorkolben (9) über ein Druckmedium in Wirkverbindung stehenden Hubkolben (15), der mit einem zweiten Führungsspalt (29) geführt ist, und eine mit dem Hubkolben (15) in Wirkverbindung stehende Ventilnadel (20), die an ihrem abspritzseitigen Ende einen Ventilschließkörper (22) aufweist, der mit einem Ventilsitzkörper (21) einen Dichtsitz bildet, auf. Die Kraftübertragung zwischen Aktorkolben (9) und Hubkolben (15) erfolgt durch einen mit Druckmedium gefüllten, von Aktorkolben (9) und Hubkolben (15) eingeschlossenen, Arbeitsraum (26). Der Aktorkolben (9) weist zumindest eine Stufe (31) auf, die an eine Dämpfungskammer (27) angrenzt, wobei die Dämpfungskammer (27) vom Arbeitsraum (26) räumlich getrennt ist und so gestaltet bzw. angeordnet ist, daß Druckmedium über eine Drosselstelle (30) zufließen bzw. abfließen kann.

Figure 00000001
A fuel injection valve (1), in particular for injecting fuel directly into a combustion chamber of an internal combustion engine, has a piezoelectric, electrostrictive or magnetostrictive actuator (4), an actuator piston (9) which is operatively connected to the actuator (4) and which has a first guide gap (28), a reciprocating piston (15) which is operatively connected to the actuator piston (9) via a pressure medium, which is guided with a second guide gap (29), and a valve needle (20) which is operatively connected to the reciprocating piston (15) , which has a valve closing body (22) at its spray end, which forms a sealing seat with a valve seat body (21). The power transmission between actuator piston (9) and reciprocating piston (15) takes place through a working space (26) filled with pressure medium and enclosed by actuator piston (9) and reciprocating piston (15). The actuator piston (9) has at least one step (31) which adjoins a damping chamber (27), the damping chamber (27) being spatially separated from the working space (26) and being designed or arranged in such a way that pressure medium is via a throttle point (30) can flow in or out.
Figure 00000001
EP03012488.7A 2002-07-16 2003-06-02 Fuel injector Expired - Lifetime EP1382838B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002132193 DE10232193A1 (en) 2002-07-16 2002-07-16 Fuel injector
DE10232193 2002-07-16

Publications (3)

Publication Number Publication Date
EP1382838A2 EP1382838A2 (en) 2004-01-21
EP1382838A3 true EP1382838A3 (en) 2004-04-21
EP1382838B1 EP1382838B1 (en) 2017-08-16

Family

ID=29761999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012488.7A Expired - Lifetime EP1382838B1 (en) 2002-07-16 2003-06-02 Fuel injector

Country Status (3)

Country Link
EP (1) EP1382838B1 (en)
JP (1) JP2004052767A (en)
DE (1) DE10232193A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002309A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Fuel injector with direct needle spreader
DE102004002299A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Fuel injector with directly controlled injection valve member
DE102004024119B4 (en) 2004-05-14 2006-04-20 Siemens Ag Nozzle assembly and injector
DE102004031790A1 (en) 2004-07-01 2006-01-26 Robert Bosch Gmbh Common rail injector
DE102005009148A1 (en) * 2005-03-01 2006-09-07 Robert Bosch Gmbh Fuel injector with direct-acting injection valve member with double seat
FR2889257B1 (en) 2005-08-01 2007-11-02 Renault Sas FUEL INJECTION DEVICE AND METHOD FOR CONTROLLING SUCH A DEVICE
DE102006019308A1 (en) * 2006-04-26 2007-10-31 Robert Bosch Gmbh Injector for fuel supply to internal combustion engine, especially in motor vehicle, has piezoactuator with foot on end remote from nozzle needle with sealing profile facing needle that contacts seal seat on injector body
US9897058B2 (en) 2009-07-29 2018-02-20 Delphi International Operations S.A.R.L. Fuel injector
EP2295787B1 (en) 2009-07-29 2012-04-04 Delphi Technologies Holding S.à.r.l. Fuel Injector
CN102213165B (en) * 2010-04-08 2013-02-13 北京亚新科天纬油泵油嘴股份有限公司 High pressure common rail electronic control fuel injector
JP5462143B2 (en) * 2010-12-09 2014-04-02 株式会社日本自動車部品総合研究所 Fuel injection valve
JP5839228B2 (en) * 2011-11-21 2016-01-06 株式会社デンソー Fuel injection valve

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135872A2 (en) * 1983-09-12 1985-04-03 Robert Bosch Gmbh Fuel injector for internal-combustion engines
JPH09195891A (en) * 1996-01-19 1997-07-29 Denso Corp Fuel injection nozzle
DE19642441A1 (en) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Method for actuating a fuel injection valve for internal combustion engines
GB2339451A (en) * 1998-07-10 2000-01-26 Lucas Ind Plc A fuel injector with control chamber and a damped needle valve
WO2001023741A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
GB2356020A (en) * 1999-11-02 2001-05-09 Delphi Tech Inc Pressure wave damping device for use in a hydraulic system, eg a fuel injection system
DE10121891A1 (en) * 2001-05-05 2002-11-07 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10155229A1 (en) * 2001-11-09 2003-05-22 Bosch Gmbh Robert Valve for controlling liquids

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306072C2 (en) 1993-02-26 1994-12-08 Siemens Ag Device for opening and closing a passage opening in a housing
DE19962177A1 (en) * 1999-12-22 2001-07-12 Siemens Ag Hydraulic device for transmitting an actuator movement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135872A2 (en) * 1983-09-12 1985-04-03 Robert Bosch Gmbh Fuel injector for internal-combustion engines
JPH09195891A (en) * 1996-01-19 1997-07-29 Denso Corp Fuel injection nozzle
DE19642441A1 (en) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Method for actuating a fuel injection valve for internal combustion engines
GB2339451A (en) * 1998-07-10 2000-01-26 Lucas Ind Plc A fuel injector with control chamber and a damped needle valve
WO2001023741A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
GB2356020A (en) * 1999-11-02 2001-05-09 Delphi Tech Inc Pressure wave damping device for use in a hydraulic system, eg a fuel injection system
DE10121891A1 (en) * 2001-05-05 2002-11-07 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10155229A1 (en) * 2001-11-09 2003-05-22 Bosch Gmbh Robert Valve for controlling liquids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11 28 November 1997 (1997-11-28) *

Also Published As

Publication number Publication date
EP1382838A2 (en) 2004-01-21
JP2004052767A (en) 2004-02-19
DE10232193A1 (en) 2004-02-05
EP1382838B1 (en) 2017-08-16

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