WO2004074672A1 - Soupape d'injection de carburant dans un moteur a combustion interne - Google Patents

Soupape d'injection de carburant dans un moteur a combustion interne Download PDF

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Publication number
WO2004074672A1
WO2004074672A1 PCT/EP2004/001624 EP2004001624W WO2004074672A1 WO 2004074672 A1 WO2004074672 A1 WO 2004074672A1 EP 2004001624 W EP2004001624 W EP 2004001624W WO 2004074672 A1 WO2004074672 A1 WO 2004074672A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
nozzle needle
injection
injection valve
fuel
Prior art date
Application number
PCT/EP2004/001624
Other languages
German (de)
English (en)
Inventor
Willibald SCHÜRZ
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2004074672A1 publication Critical patent/WO2004074672A1/fr

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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
    • F02M2200/702—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical with actuator and actuated element moving in different directions, e.g. in opposite directions
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Injection valve for injecting fuel into an internal combustion engine
  • the invention relates to an injection valve for injecting fuel into an internal combustion engine according to the preamble of claim 1.
  • Accumulator injection systems are increasingly used for the fuel supply of internal combustion engines, in which very high injection pressures are used.
  • Such injection systems are known as common rail systems (for diesel engines) and HPDI injection systems (for gasoline engines).
  • the fuel is common to all cylinders of the engine using a high-pressure pump
  • Pressure accumulator promoted from which the injectors on the individual cylinders are supplied with fuel.
  • the opening and closing of the injection valves is usually controlled electromagnetically.
  • the injection valves in such systems are equipped with switchable actuators, in particular piezoelectric actuators, which control the opening and closing of the nozzle needle of the injection valve, that is to say in particular the timing of the start and the end of the injection process.
  • a generic injection valve is known from EP 0 995 901 A1, in which the actuator designed as a piezoelectric actuator is in direct operative connection with the nozzle needle.
  • the power losses are caused by permanent and switching leaks. reduced by the direct operative connection with the nozzle needle, but this known arrangement does not guarantee that the nozzle needle closes the injection bores reliably when the actuator is de-energized.
  • the object of the invention is to provide an injection valve, the nozzle needle of which reliably closes the injection bores when the actuator is not actuated.
  • the inventive at any time, play-free interaction of the actuator on the one hand and the nozzle needle on the other hand ensures that even when the actuator is not actuated, that is to say when the actuator is de-energized in the case of a piezoelectric actuator, the nozzle needle is pressed by means of the spring to reliably close the injection bores against the sealing seat.
  • FIG. 1 shows a schematic longitudinal section through an injection valve according to the invention
  • FIG. 2 shows a section along the line II-II according to FIG. 1.
  • the injector shown essentially consists of a valve housing 1, a nozzle body 3 connected to the valve housing 1 via a union nut 2 and an actuator 4 arranged in the valve housing 1, which is preferably designed as a piezoelectric actuator ,
  • the actuator 4 serves to move a nozzle needle 6, which is axially movably mounted in a bore 5 of the nozzle body 3, between an injection bores 7 at the front end of the bore 5 and a position closing these injection bores 7.
  • the actuation of the nozzle needle 6 by means of the actuator 4 takes place via a drive system 8, which connects the actuator 4 and the nozzle needle 6 with one another at any time without play.
  • the drive system 8 consists of a base plate 4a of the actuator 4, one in
  • the actuation of the nozzle needle 6 via the actuator 4 takes place in the case of an injection valve designed in this way as follows:
  • Figure 1 shows the injection valve in the position in which the nozzle needle 6 with its front sealing region ⁇ b closes the injection bores 7 formed in the nozzle body 3 and leading to the combustion chamber of an internal combustion engine.
  • the actuator 4 expands.
  • This extension of the actuator length causes the actuator 4 to press the sleeve 9 downward in the direction of the nozzle needle 6 via its base plate 4a.
  • the sleeve 9 in turn now acts on the rocker arm mechanism 10 consisting of a plurality of two-armed levers in such a way that by pressing down the one lever arm 10a, which is in operative connection with the sleeve 9, the other lever arm, which is in contact with the underside of the collar ⁇ a of the nozzle needle ⁇ 10b is moved upwards, whereby the nozzle needle 6 is raised via the collar ⁇ a against the force of the spring 11.
  • the lifting of the nozzle needle ⁇ causes the sealing area 6b of the nozzle needle 6 to open the injection bores 7, so that the fuel supplied to the valve housing 1 from a high-pressure accumulator (not shown) can reach the combustion chamber of the internal combustion engine via the injection bores 7 via the injection bores 7.
  • the fuel flows to the injection bores 7 via the high-pressure connection 12 on the valve housing 1 and a clearance compensation space 13 arranged above the actuator 4 in the valve housing 1 through flow channels 14 which are formed between the actuator 4 or the drive mechanism 8 and the inside of the valve housing 1 ,
  • the clearance compensation space 13 arranged above the actuator 4 and filled with high-pressure fuel has the effect that the actuator 4 shear activation can only extend in the direction of the drive system 8.
  • key surfaces 15 for reducing the diameter of the guide region ⁇ c are formed on a central guide region ⁇ c arranged between the collar ⁇ a and the sealing region 6b of the nozzle needle ⁇ to produce the flow channels 14 ,
  • the injection bores 7 are closed by deactivating the actuator 4.
  • the lowering of the electrical energy applied to the piezoelectric actuator 4 or the de-energization of the actuator 4 have the effect that the overall length of the actuator 4 is reduced again. This shortening of the actuator 4 reduces the pressure force exerted on the rocker arm mechanism 10 via the base plate 4a of the actuator 4 and the sleeve 9.
  • An injection valve designed in this way is characterized in that the drive system 8 acting between the actuator 4 on the one hand and the nozzle needle 6 on the other hand always works without play, which ensures that the nozzle needle 6 closes the injection bores 7 reliably when the actuator 4 is de-energized.

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

L'invention concerne une soupape d'injection de carburant dans un moteur à combustion interne. L'invention vise à ce que le pointeau (6) ferme de manière fiable les alésages d'injection (7) lorsque l'actionneur (4) est au repos. A cet effet, le contact entre l'actionneur (4) et le pointeau (6) est exempt de jeu, un ressort (11) étant disposé entre le fond (4a) de l'actionneur (4) et une embase (6a) du pointeau (6).
PCT/EP2004/001624 2003-02-19 2004-02-19 Soupape d'injection de carburant dans un moteur a combustion interne WO2004074672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10307003.6 2003-02-19
DE10307003A DE10307003B3 (de) 2003-02-19 2003-02-19 Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine

Publications (1)

Publication Number Publication Date
WO2004074672A1 true WO2004074672A1 (fr) 2004-09-02

Family

ID=32103483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/001624 WO2004074672A1 (fr) 2003-02-19 2004-02-19 Soupape d'injection de carburant dans un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE10307003B3 (fr)
WO (1) WO2004074672A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031372A1 (de) * 2006-07-06 2008-01-10 Siemens Ag Injektor, Einspritzsystem und Verfahren zum Herstellen eines Injektors
DE102006031373B4 (de) * 2006-07-06 2013-03-07 Continental Automotive Gmbh Einspritzsystem und Verfahren zum Herstellen eines Einspritzsystems
DE102007036571B3 (de) * 2007-08-03 2009-04-02 Continental Automotive Gmbh Injektor und Vorrichtung mit einem Gefäß und einem das Gefäß umschließenden Gehäuse

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19714486A1 (de) * 1997-04-08 1998-10-22 Siemens Ag Vorrichtung zum Übertragen einer Auslenkung eines Aktors
DE19757659C1 (de) * 1997-12-23 1999-06-17 Siemens Ag Einspritzventil mit einer Ausgleichsfläche
EP0995901A1 (fr) 1998-10-22 2000-04-26 Lucas Industries Limited Injecteur à combustible
DE19915210A1 (de) * 1999-04-03 2000-10-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19940055C1 (de) * 1999-08-24 2001-04-05 Siemens Ag Dosierventil
EP1130249A2 (fr) * 2000-02-29 2001-09-05 Rodi Power Systems, Inc. Soupape d'injection de carburant avec actionneur magnetostrictif
US6494382B1 (en) * 1999-03-12 2002-12-17 Robert Bosch Gmbh Fuel injection valve
WO2003064848A1 (fr) * 2002-01-30 2003-08-07 Robert Bosch Gmbh Soupape d'injection de carburant
WO2004046540A1 (fr) * 2002-11-20 2004-06-03 Siemens Aktiengesellschaft Injecteur dote d'un pointeau a niveaux a entrainement direct pour l'injection de carburant dans un moteur a combustion interne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952057A1 (de) * 1999-10-28 2001-05-03 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10101799A1 (de) * 2001-01-17 2002-07-18 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19714486A1 (de) * 1997-04-08 1998-10-22 Siemens Ag Vorrichtung zum Übertragen einer Auslenkung eines Aktors
DE19757659C1 (de) * 1997-12-23 1999-06-17 Siemens Ag Einspritzventil mit einer Ausgleichsfläche
EP0995901A1 (fr) 1998-10-22 2000-04-26 Lucas Industries Limited Injecteur à combustible
US6494382B1 (en) * 1999-03-12 2002-12-17 Robert Bosch Gmbh Fuel injection valve
DE19915210A1 (de) * 1999-04-03 2000-10-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19940055C1 (de) * 1999-08-24 2001-04-05 Siemens Ag Dosierventil
EP1130249A2 (fr) * 2000-02-29 2001-09-05 Rodi Power Systems, Inc. Soupape d'injection de carburant avec actionneur magnetostrictif
WO2003064848A1 (fr) * 2002-01-30 2003-08-07 Robert Bosch Gmbh Soupape d'injection de carburant
WO2004046540A1 (fr) * 2002-11-20 2004-06-03 Siemens Aktiengesellschaft Injecteur dote d'un pointeau a niveaux a entrainement direct pour l'injection de carburant dans un moteur a combustion interne

Also Published As

Publication number Publication date
DE10307003B3 (de) 2004-05-13

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