EP1801409B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1801409B1
EP1801409B1 EP05258059A EP05258059A EP1801409B1 EP 1801409 B1 EP1801409 B1 EP 1801409B1 EP 05258059 A EP05258059 A EP 05258059A EP 05258059 A EP05258059 A EP 05258059A EP 1801409 B1 EP1801409 B1 EP 1801409B1
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.)
Not-in-force
Application number
EP05258059A
Other languages
German (de)
English (en)
Other versions
EP1801409A1 (fr
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/fr
Priority to AT05258059T priority patent/ATE406517T1/de
Priority to DE602005009384T priority patent/DE602005009384D1/de
Publication of EP1801409A1 publication Critical patent/EP1801409A1/fr
Application granted granted Critical
Publication of EP1801409B1 publication Critical patent/EP1801409B1/fr
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.
  • EP 1 259 729 discloses a known fuel injector having a two part armature.
  • 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 film 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)

Claims (5)

  1. Injecteur de carburant pour un moteur à combustion interne, l'injecteur comprenant un corps d'injecteur (3) ayant une portion d'embout définissant une ouverture de pulvérisation (4) ; une aiguille (1) s'étendant à l'intérieur de la portion d'embout pour un mouvement axial entre une position ouverte et une position fermée, l'aiguille (1) ayant une portion de tête (2) susceptible d'engager un siège de valve pour fermer l'ouverture de pulvérisation (4) quand l'aiguille (1) est dans sa position fermée ; des moyens (5) étant prévus pour forcer l'aiguille vers sa position fermée ; et des moyens à solénoïde pour déplacer sélectivement l'aiguille (1) vers ladite position ouverte ; lesdits moyens à solénoïde comprenant une bobine électromagnétique (6) et une armature mobile capable de recevoir une action de la part de la bobine (6) pour forcer l'aiguille (1) vers sa position ouverte ; caractérisé en ce que l'armature comprend une partie d'armature supérieure (7) et une partie d'armature inférieure (8), chaque partie d'armature étant guidée de manière mobile et de façon indépendante sur l'aiguille (1), des moyens de sollicitation (11) étant prévus entre la partie d'armature supérieure et la partie d'armature inférieure (7, 8) en sollicitant la partie d'armature supérieure et la partie d'armature inférieure en éloignement l'une de l'autre, les moyens de sollicitation (11) sollicitant la partie d'armature supérieure (7) vers un arrêt supérieur (9) prévu sur l'aiguille (1) et sollicitant la partie d'armature inférieure (4) vers un arrêt inférieur (10) prévu sur l'aiguille (1), dans lequel la partie d'armature inférieure (8) a sensiblement la forme d'une coupelle, au moins une portion de la région extérieure de la partie d'armature inférieure (8) entourant la partie d'armature supérieure (7) pour amener la partie d'armature inférieure (7) jusque dans le champ magnétique de la bobine (6).
  2. Injecteur de carburant selon la revendication 1, dans lequel les moyens de sollicitation (11) comprennent un unique ressort de compression.
  3. Injecteur de carburant selon la revendication 1, dans lequel les moyens de sollicitation (11) comprennent un ressort de compression supérieur et un ressort de compression inférieur, ledit ressort supérieur et ledit ressort inférieur étant agencés coaxialement sur l'aiguille (1) et étant séparés par un arrêt fixe ou un collier prévu sur l'aiguille (1), le ressort supérieur agissant sur la partie d'armature inférieure (7) et le ressort inférieur agissant sur la partie d'armature inférieure (8).
  4. Injecteur de carburant selon l'une quelconque des revendications précédentes, dans lequel des intervalles d'amortissement en film à écrasement prédéfini sont prévus entre la partie d'armature supérieure (8) et l'arrêt supérieur (9), entre la partie d'armature inférieure (8) et l'arrêt inférieur (10) et entre la partie d'armature supérieure et la partie d'armature inférieure, respectivement.
  5. Injecteur de carburant selon l'une quelconque des revendications précédentes, dans lequel la partie d'armature supérieure (7) est formée en un matériau non magnétique.
EP05258059A 2005-12-23 2005-12-23 Injecteur de carburant Not-in-force EP1801409B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05258059A EP1801409B1 (fr) 2005-12-23 2005-12-23 Injecteur de carburant
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 (fr) 2005-12-23 2005-12-23 Injecteur de carburant

Publications (2)

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

Family

ID=36264033

Family Applications (1)

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

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013085140A1 (fr) * 2011-12-09 2013-06-13 주식회사 케피코 Injecteur de carburant à injection directe

Families Citing this family (15)

* 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
EP2236807B1 (fr) * 2009-03-23 2016-05-11 Continental Automotive GmbH Injecteur de fluide
EP2241743B1 (fr) * 2009-04-14 2014-07-02 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
CA2770415C (fr) * 2009-08-27 2012-08-28 Mcalister Technologies, Llc Ensembles actionneurs d'injecteurs de carburant et procedes associes d'utilisation et de fabrication
EP2365205B1 (fr) 2010-03-03 2013-05-15 Continental Automotive GmbH Soupape d'injection
EP2444651B1 (fr) * 2010-10-19 2013-07-10 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
WO2015039859A1 (fr) * 2013-09-18 2015-03-26 Continental Automotive Gmbh Ensemble de soupape pour une soupape d'injection et soupape d'injection
DE102013222590A1 (de) * 2013-11-07 2015-05-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
EP2896813B1 (fr) * 2014-01-17 2018-01-10 Continental Automotive GmbH Soupape d'injection de carburant pour moteurs à combustion interne
JP6327191B2 (ja) * 2015-04-07 2018-05-23 株式会社デンソー 燃料噴射弁
JP6426556B2 (ja) 2015-08-06 2018-11-21 株式会社デンソー 燃料噴射装置
JP6483574B2 (ja) * 2015-08-25 2019-03-13 株式会社デンソー 燃料噴射装置
JP6655723B2 (ja) * 2016-08-26 2020-02-26 日立オートモティブシステムズ株式会社 燃料噴射弁
WO2019065406A1 (fr) * 2017-09-29 2019-04-04 株式会社デンソー Soupape d'injection de carburant et procédé de fabrication de soupape d'injection de carburant
JP6566077B2 (ja) * 2018-04-12 2019-08-28 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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19849210A1 (de) 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19855547A1 (de) * 1998-12-02 2000-06-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19948238A1 (de) * 1999-10-07 2001-04-19 Bosch Gmbh Robert Brennstoffeinspritzventil
US6454191B1 (en) 2000-01-10 2002-09-24 Delphi Technologies, Inc. Electromagnetic fuel injector dampening device
DE10004960A1 (de) * 2000-02-04 2001-08-09 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zu dessen Betätigung
WO2002042632A2 (fr) * 2000-11-23 2002-05-30 Robert Bosch Gmbh Electrovanne destinee a la commande d'une soupape d'injection d'un moteur a combustion interne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013085140A1 (fr) * 2011-12-09 2013-06-13 주식회사 케피코 Injecteur de carburant à injection directe
EP2789844A4 (fr) * 2011-12-09 2015-09-09 Kefico Corp Injecteur de carburant à injection directe
US9651010B2 (en) 2011-12-09 2017-05-16 Hyundai Kefico Corporation Fuel injector for directly injecting fuel into a combustion chamber of an engine

Also Published As

Publication number Publication date
ATE406517T1 (de) 2008-09-15
DE602005009384D1 (de) 2008-10-09
EP1801409A1 (fr) 2007-06-27

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