EP1801409A1 - Kraftstoffinjektor - Google Patents

Kraftstoffinjektor Download PDF

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Publication number
EP1801409A1
EP1801409A1 EP05258059A EP05258059A EP1801409A1 EP 1801409 A1 EP1801409 A1 EP 1801409A1 EP 05258059 A EP05258059 A EP 05258059A EP 05258059 A EP05258059 A EP 05258059A EP 1801409 A1 EP1801409 A1 EP 1801409A1
Authority
EP
European Patent Office
Prior art keywords
pintle
armature part
armature
fuel injector
biasing
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
EP05258059A
Other languages
English (en)
French (fr)
Other versions
EP1801409B1 (de
Inventor
Guy Hoffman
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP05258059A priority Critical patent/EP1801409B1/de
Priority to AT05258059T priority patent/ATE406517T1/de
Priority to DE602005009384T priority patent/DE602005009384D1/de
Publication of EP1801409A1 publication Critical patent/EP1801409A1/de
Application granted granted Critical
Publication of EP1801409B1 publication Critical patent/EP1801409B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the present invention relates to a fuel injector and in particular to a fuel injector having improved means for eliminating valve bounce.
  • Modern direct injection gasoline engines require fuel injectors to operate under extreme conditions of temperature and pressure and with high fuel pressures. Furthermore, the fuel injector must open and close very rapidly in order to provide the high linear range required in modern engine applications.
  • valve bounce A particular problem with known solenoid actuated fuel injectors when operated at high speed is valve bounce.
  • the impact of the pintle head against the valve seat can be substantial due to the large mass of the armature connected to the pintle and the force exerted on the pintle by the return spring. Due to the elasticity of the valve surfaces and the stiffness of the pintle the pintle head tends to rebound from the valve seat causing the injector to re-open.
  • Such valve bounce causes one or more unmetered after injections of fuel delivery after injector closing, as shown in Fig 1. This problem is particularly acute in high pressure applications.
  • a fuel injector for an internal combustion engine comprising an injector body having a tip portion defining a spray aperture; a pintle extending within the tip portion for axial movement between an open position and a closed position, the pintle having a head portion engageable with a valve seat to close the spray aperture when the pintle is in its closed position; means being provided for urging the pintle towards its closed position; and solenoid means for selectively moving the pintle into said open position; said solenoid means comprising an electromagnetic coil and a moveable armature capable of being acted upon by the coil to urge the pintle towards its open position; wherein the armature comprises an upper armature part and a lower armature part, each armature part being independently moveably guided on the pintle, biasing means being provided between the two armature parts biasing the upper and lower armature parts away from one another, the biasing means biasing the upper armature part towards an upper stop provided on the pintle
  • a fuel injector includes a pintle 1 having a valve head 2 at a distal end thereof, the pintle 1 being axially moveable within an injector body 3 between a closed position wherein the valve head 2 abuts a valve seat to close a spray aperture 4 in an injector tip and an open position wherein the valve head 2 is spaced from the valve seat to permit high pressure fluid to be ejected through the spray aperture 4.
  • a return spring 5 biases the pintle 1 to its closed position and a solenoid, comprising an electromagnetic coil 6 mounted within the injector body 3 and a two part armature mounted on the pintle 1, is selectively actuable to move the pintle 1 to its open position against the return spring 5.
  • the armature comprises an upper armature part 7 and a lower armature part 8, each armature part 7,8 being independently slidably mounted on the pintle 1 for limited axial movement with respect to the pintle 1 between fixed upper and lower stops 9,10 located on the pintle 1.
  • a compression spring 11 is located between the upper and lower armature parts biases the upper and lower armature parts away from one another whereby the spring 11 biases the upper armature part 7 against the upper stop 9 and the lower armature part 8 against the lower stop 10.
  • the lower armature part 8 is cup shaped, an outer region of the lower armature part 8 surrounding the upper armature part 7 to bring the lower armature part 7 into the magnetic field of the coil 6.
  • the two part armature of the present invention provides a three mass system (i.e. the pintle, lower armature part and upper armature).
  • the lower armature part 7 behaves like a downwardly biased single part armature while the upper armature part 8 behaves like an upwardly biased single part armature.
  • the two part armature arrangement provides three squeeze file damping gaps that can provide damping to eliminate valve bounce, namely a gap between the upper armature part 7 and the upper stop 9, a gap between the lower armature part 8 and the lower stop 10 and a gap between co-operating contact faces of the upper and lower armature parts.
  • Each of these gaps can be optimised to tune the opening and closing behaviour of the injector.
  • Fig 3 illustrates the movement of the valve head 2 of the pintle 1 when the solenoid is operated to deliver a predetermined amount of fuel to the combustion chamber of an internal combustion engine.
  • Fig 4 illustrates the movement of the upper armature part 7 of the injector during the same time interval while Fig 5 illustrates the movement of the lower armature part 8 during said time interval.
  • the solenoid remains energised for a period of time (between points C and D) to deliver a predetermined volume of fuel through the spray aperture 4.
  • the solenoid coil 6 is de-energised and the magnetic field generated by the solenoid coil rapidly breaks down.
  • the spring force of the return spring 5 now urges the pintle 1 and the upper and lower armature parts away from the coil 6 until the valve head 2 impacts the valve seat.
  • the greater strength of the return spring 5 compared to the compression spring 11 between the upper and lower armature parts and the inertia of the lower armature part retains the lower armature part 8 in contact with the upper armature part 7.
  • the upper and lower armature parts 7,8 continue to move downwardly until the lower armature part 8 impacts the lower stop 10 at point F.
  • the spring 11 then enhances the rebound of the upper armature part back up towards the upper stop 9 until the upper armature part returns to its at rest position at point G.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP05258059A 2005-12-23 2005-12-23 Kraftstoffinjektor Not-in-force EP1801409B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05258059A EP1801409B1 (de) 2005-12-23 2005-12-23 Kraftstoffinjektor
AT05258059T ATE406517T1 (de) 2005-12-23 2005-12-23 Kraftstoffinjektor
DE602005009384T DE602005009384D1 (de) 2005-12-23 2005-12-23 Kraftstoffinjektor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05258059A EP1801409B1 (de) 2005-12-23 2005-12-23 Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP1801409A1 true EP1801409A1 (de) 2007-06-27
EP1801409B1 EP1801409B1 (de) 2008-08-27

Family

ID=36264033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05258059A Not-in-force EP1801409B1 (de) 2005-12-23 2005-12-23 Kraftstoffinjektor

Country Status (3)

Country Link
EP (1) EP1801409B1 (de)
AT (1) ATE406517T1 (de)
DE (1) DE602005009384D1 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236807A1 (de) * 2009-03-23 2010-10-06 Continental Automotive GmbH Fluidinjektor
EP2241743A1 (de) * 2009-04-14 2010-10-20 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
EP2365205A1 (de) 2010-03-03 2011-09-14 Continental Automotive GmbH Einspritzventil
EP2444651A1 (de) * 2010-10-19 2012-04-25 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
KR101290899B1 (ko) 2007-11-12 2013-07-29 현대자동차주식회사 자동차용 2단제어 분사노즐장치
CN104136761A (zh) * 2011-12-09 2014-11-05 现代凯菲克株式会社 直喷式燃料喷射器
WO2015039859A1 (en) * 2013-09-18 2015-03-26 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
EP2871352A1 (de) * 2013-11-07 2015-05-13 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
EP2896813A1 (de) * 2014-01-17 2015-07-22 Continental Automotive GmbH Kraftstoffeinspritzventil für einen Verbrennungsmotor
EP2924148A1 (de) * 2009-08-27 2015-09-30 McAlister Technologies, LLC Brennstoffeinspritzventil
WO2016163110A1 (ja) * 2015-04-07 2016-10-13 株式会社デンソー 燃料噴射弁
WO2017022163A1 (ja) * 2015-08-06 2017-02-09 株式会社デンソー 燃料噴射装置
JP2017044096A (ja) * 2015-08-25 2017-03-02 株式会社デンソー 燃料噴射装置
JP2018109414A (ja) * 2018-04-12 2018-07-12 株式会社デンソー 燃料噴射弁、及び、燃料噴射弁の製造方法
JPWO2018037748A1 (ja) * 2016-08-26 2019-02-14 日立オートモティブシステムズ株式会社 燃料噴射弁
WO2019065406A1 (ja) * 2017-09-29 2019-04-04 株式会社デンソー 燃料噴射弁および燃料噴射弁の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1068440A1 (de) * 1998-12-02 2001-01-17 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
EP1137877A1 (de) * 1999-10-07 2001-10-04 Robert Bosch Gmbh Brennstoffeinspritzventil
US6367769B1 (en) 1998-10-26 2002-04-09 Robert Bosch Gmbh Fuel injection valve
US20020063173A1 (en) 2000-01-10 2002-05-30 Spakowski Joseph George Electromagnetic fuel injector dampening device
EP1259729A2 (de) * 2000-11-23 2002-11-27 Robert Bosch Gmbh Magnetventil zur steuerung eines einspritzventils einer brennkraftmaschine
US20030127531A1 (en) * 2000-02-04 2003-07-10 Guenther Hohl Fuel injection valve and a method for operating the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6367769B1 (en) 1998-10-26 2002-04-09 Robert Bosch Gmbh Fuel injection valve
EP1068440A1 (de) * 1998-12-02 2001-01-17 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
EP1137877A1 (de) * 1999-10-07 2001-10-04 Robert Bosch Gmbh Brennstoffeinspritzventil
US20020063173A1 (en) 2000-01-10 2002-05-30 Spakowski Joseph George Electromagnetic fuel injector dampening device
US20030127531A1 (en) * 2000-02-04 2003-07-10 Guenther Hohl Fuel injection valve and a method for operating the same
EP1259729A2 (de) * 2000-11-23 2002-11-27 Robert Bosch Gmbh Magnetventil zur steuerung eines einspritzventils einer brennkraftmaschine

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101290899B1 (ko) 2007-11-12 2013-07-29 현대자동차주식회사 자동차용 2단제어 분사노즐장치
EP2236807A1 (de) * 2009-03-23 2010-10-06 Continental Automotive GmbH Fluidinjektor
US8186605B2 (en) 2009-03-23 2012-05-29 Continental Automotive Gmbh Fluid injector
EP2241743A1 (de) * 2009-04-14 2010-10-20 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
EP2924148A1 (de) * 2009-08-27 2015-09-30 McAlister Technologies, LLC Brennstoffeinspritzventil
EP2365205A1 (de) 2010-03-03 2011-09-14 Continental Automotive GmbH Einspritzventil
WO2012052364A1 (en) * 2010-10-19 2012-04-26 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
US9359984B2 (en) 2010-10-19 2016-06-07 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
EP2444651A1 (de) * 2010-10-19 2012-04-25 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
CN104136761A (zh) * 2011-12-09 2014-11-05 现代凯菲克株式会社 直喷式燃料喷射器
US9651010B2 (en) 2011-12-09 2017-05-16 Hyundai Kefico Corporation Fuel injector for directly injecting fuel into a combustion chamber of an engine
WO2015039859A1 (en) * 2013-09-18 2015-03-26 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
EP2871352A1 (de) * 2013-11-07 2015-05-13 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
EP2896813A1 (de) * 2014-01-17 2015-07-22 Continental Automotive GmbH Kraftstoffeinspritzventil für einen Verbrennungsmotor
KR20150086191A (ko) * 2014-01-17 2015-07-27 콘티넨탈 오토모티브 게엠베하 내연 기관을 위한 연료 분사 밸브
US9382885B2 (en) 2014-01-17 2016-07-05 Continental Automotive Gmbh Fuel injection valve for an internal combustion engine
KR102274061B1 (ko) 2014-01-17 2021-07-07 콘티넨탈 오토모티브 게엠베하 내연 기관을 위한 연료 분사 밸브
JP2016200011A (ja) * 2015-04-07 2016-12-01 株式会社デンソー 燃料噴射弁
US10428778B2 (en) 2015-04-07 2019-10-01 Denso Corporation Fuel injection valve
WO2016163110A1 (ja) * 2015-04-07 2016-10-13 株式会社デンソー 燃料噴射弁
US11047352B2 (en) 2015-04-07 2021-06-29 Denso Corporation Fuel injection valve
CN107407240B (zh) * 2015-04-07 2019-09-24 株式会社电装 燃料喷射阀
CN107407240A (zh) * 2015-04-07 2017-11-28 株式会社电装 燃料喷射阀
US10309356B2 (en) 2015-08-06 2019-06-04 Denso Corporation Fuel injection device
WO2017022163A1 (ja) * 2015-08-06 2017-02-09 株式会社デンソー 燃料噴射装置
JP2017031963A (ja) * 2015-08-06 2017-02-09 株式会社デンソー 燃料噴射装置
US10941739B2 (en) 2015-08-06 2021-03-09 Denso Corporation Fuel injection device
CN107923355A (zh) * 2015-08-25 2018-04-17 株式会社电装 燃料喷射装置
US10302057B2 (en) 2015-08-25 2019-05-28 Denso Corporation Fuel injection device
WO2017033370A1 (ja) * 2015-08-25 2017-03-02 株式会社デンソー 燃料噴射装置
JP2017044096A (ja) * 2015-08-25 2017-03-02 株式会社デンソー 燃料噴射装置
JPWO2018037748A1 (ja) * 2016-08-26 2019-02-14 日立オートモティブシステムズ株式会社 燃料噴射弁
WO2019065406A1 (ja) * 2017-09-29 2019-04-04 株式会社デンソー 燃料噴射弁および燃料噴射弁の製造方法
JP2018109414A (ja) * 2018-04-12 2018-07-12 株式会社デンソー 燃料噴射弁、及び、燃料噴射弁の製造方法

Also Published As

Publication number Publication date
ATE406517T1 (de) 2008-09-15
EP1801409B1 (de) 2008-08-27
DE602005009384D1 (de) 2008-10-09

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