WO1996037698A1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

Info

Publication number
WO1996037698A1
WO1996037698A1 PCT/DE1996/000818 DE9600818W WO9637698A1 WO 1996037698 A1 WO1996037698 A1 WO 1996037698A1 DE 9600818 W DE9600818 W DE 9600818W WO 9637698 A1 WO9637698 A1 WO 9637698A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle needle
injection valve
piston
secondary piston
injection
Prior art date
Application number
PCT/DE1996/000818
Other languages
German (de)
English (en)
Inventor
Wendelin KLÜGL
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
Priority to DE59604782T priority Critical patent/DE59604782D1/de
Priority to EP96914853A priority patent/EP0828936B1/fr
Publication of WO1996037698A1 publication Critical patent/WO1996037698A1/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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/06—Other fuel injectors peculiar thereto
    • 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
    • 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
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Definitions

  • the invention relates to an injection valve according to the preamble of claim 1.
  • Such an injection valve is known for example from EP-A 0 531 533.
  • This publication deals with a diesel injection device with a high-pressure system (common rail system), in which the fuel is supplied to a high-pressure accumulator via a high-pressure pump. This fuel, which is under high pressure, is then fed to the individual cylinders of a diesel engine via injection valves in accordance with a control.
  • the injection valves are each controlled by a solenoid valve, for example to enable individual injection times.
  • the injection valves should be able to be switched quickly at high injection pressures.
  • a pre-injection is difficult to use when using a solenoid valve, since the switching times of the solenoid valve are too long and the valve has to go through the full stroke in order to achieve reproducible conditions, for example the injection quantity.
  • the shaping of the injection rate i.e. Slow opening, but fastest closing of the nozzle needle, whereby the injection rate can be shaped according to a map, hardly possible.
  • the nozzle needle is actuated practically directly by the piezo actuator, the nozzle needle is actuated as quickly as possible.
  • the illustration shows an injection valve in section.
  • the injection valve shown in the figure consists of an elongated housing 5, on the lower end of which a union nut 3 is screwed on. With this cap nut 3, an intermediate washer 4 and a nozzle body 1, in which a nozzle needle 2 is guided, are held from the lower end of the housing 5.
  • the intermediate disk 4 and the nozzle body 1 have a central bore in which the nozzle needle 2 is guided so as to be displaceable in the axial direction.
  • a stepped plunger 7 is guided in the axial direction, which rests against the nozzle needle 2 at one end and is connected at the other end to a secondary piston 14 of the piezoelectric drive device.
  • a first pressure chamber 8 is provided, which is connected to a fuel inlet connection 10 via an inlet bore 9.
  • This high-pressure inlet connection 10 is also connected via an inlet bore 6 to a second pressure chamber 11, in the area of which the nozzle needle 2 is stepped, whereby a control surface for controlling the nozzle needle 2 is formed.
  • the tappet 7 is connected to a secondary piston 14 which is guided in a primary piston.
  • a piezo actuator 20 acts on the primary piston, which is mounted in a closure 21 and is opposite the actuator.
  • door housing 12 is sealed by an O-ring 22.
  • the closure 21 is secured in the axial direction by means of a securing ring 24. Electrical connections 23 lead to the actuator 20.
  • the piezo actuator 20 acts via the primary piston 19 on a plate spring 13. Furthermore, a spring 15 is provided in the recess of the secondary piston, which presses on an inner surface of the primary piston 19.
  • the injection valve also has a plurality of bores or spaces which are under low pressure.
  • This space 16 is connected to a return 25 via a leakage bore 27 and 29.
  • the piezo actuator 20 is arranged in a leakage space 26, which also opens into the return.
  • This space 26 is further connected via a relief bore 18 to a space 17 in which the spring 15 is arranged.
  • the working space 28 in the area of the plate spring 13 is always filled with fuel, which penetrates into this space due to the play between the upper area of the tappet 7 and the housing 5.
  • the effective areas for the pressure are designed so that the ring area on the plunger 7 is somewhat smaller than the ring area on the pressure shoulder of the nozzle needle 2. Therefore, even when the nozzle needle 2 is closed, there is always a resulting pressure force which acts upwards. but it is such that it is exceeded by the spring force of the spring 15, whereby the nozzle needle 2 is pressed securely onto its seat. No injection takes place in this position.
  • the effective diameters of the plunger 7 and the nozzle needle 2 mentioned are designed so that the spring 15 can be designed for acceptable, small forces.
  • the spring force must be so great that the nozzle needle 2 can be pressed onto the seat quickly enough at the end of the injection. It should be borne in mind that it acts upwards during the injection of the nozzle seat area.
  • a quick closing process of the nozzle needle has a favorable effect on the exhaust gas values of the internal combustion engine.
  • a piezo actuator offers the possibility of realizing faster switching operations than an electromagnet.
  • the small paths that a piezo actuator makes and therefore have to be translated are problematic.
  • the tappet 7 to the housing 5 and the secondary piston 14 to the primary piston 19 and the primary piston 19 to the actuator housing 12 are paired with one another with fits.
  • the fits only represent a gap seal, so that a small amount of fuel can constantly leak from the inlet 10 through the pressure chamber 8 along the tappet 7.
  • One L-corner portion goes in the direction of the nozzle needle 2 and must be fed to the return via the leakage holes 29 and 27.
  • the other leakage part enters the working space 28 and keeps it filled. Leakage fuel with excess flow flows along the secondary piston 14 via the relief bore 18 into the leakage space 26 and from there to the return 25.
  • the working space 28 is thus always full of fuel.
  • Disc spring 13 presses primary piston 19 with a defined preload against piezo actuator 20 into the starting position without play.
  • the plunger 7 In the starting position (rest position), the plunger 7 is pressed down by the spring 15 via the secondary piston 14 (no injection in this state).
  • the piezo actuator 20 When the piezo actuator 20 is energized, it expands downward and also moves the primary piston 19 downward against the force of the telescopic spring 13.
  • the volume of liquid in the working space 28 is displaced and guides the secondary piston 14 with the plunger upwards, as a result of which the nozzle needle 2 is moved upwards due to the resulting pressure force.
  • the start of injection is hereby triggered.
  • This construction of the piezo actuator with the two pistons ensures that the plunger 7 and thus the nozzle needle 2 are always moved from a defined starting position.
  • the return 25 is relieved to low pressure.
  • Piezo stacks are preferred as the piezo actuator, which also facilitate operation with relatively low voltages in the vehicle.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection comportant une aiguille d'injection (2) placée dans un corps de soupape (1), une arrivée de carburant et un dispositif de commande piézo-électrique à conversion hydraulique. Afin de permettre un actionnement rapide de la soupape, il est prévu que l'aiguille d'injection (2) puisse être pilotée directement par l'intermédiaire d'une tige-poussoir (7), par un piston secondaire (14), pouvant être actionné par le piston primaire (19) de l'unité de commande piézo-électrique. Cette soupape d'injection s'utilise dans des systèmes d'injection de carburant Diesel.
PCT/DE1996/000818 1995-05-24 1996-05-11 Soupape d'injection WO1996037698A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59604782T DE59604782D1 (de) 1995-05-24 1996-05-11 Einspritzventil
EP96914853A EP0828936B1 (fr) 1995-05-24 1996-05-11 Soupape d'injection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19519191A DE19519191C2 (de) 1995-05-24 1995-05-24 Einspritzventil
DE19519191.9 1995-05-24

Publications (1)

Publication Number Publication Date
WO1996037698A1 true WO1996037698A1 (fr) 1996-11-28

Family

ID=7762838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/000818 WO1996037698A1 (fr) 1995-05-24 1996-05-11 Soupape d'injection

Country Status (4)

Country Link
EP (1) EP0828936B1 (fr)
DE (2) DE19519191C2 (fr)
ES (1) ES2145446T3 (fr)
WO (1) WO1996037698A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884848A (en) * 1997-05-09 1999-03-23 Cummins Engine Company, Inc. Fuel injector with piezoelectric and hydraulically actuated needle valve
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve
WO2000017508A1 (fr) * 1998-09-23 2000-03-30 Robert Bosch Gmbh Soupape d'injection de carburant
DE10007735A1 (de) * 2000-02-19 2001-09-06 Daimler Chrysler Ag Einspritzventil
EP1865195A1 (fr) * 2006-06-07 2007-12-12 Robert Bosch Gmbh Dispositif destiné à la vaporisation de carburant
WO2008017538A1 (fr) * 2006-08-07 2008-02-14 Robert Bosch Gmbh Injecteur de carburant avec commande directe du pointeau et servosoupape d'assistance
KR100853645B1 (ko) * 2001-07-09 2008-08-25 로베르트 보쉬 게엠베하 연료 분사 밸브
DE102008000336A1 (de) 2007-03-13 2008-09-18 Denso Corp., Kariya Kraftstoffeinspritzventil
US7455244B2 (en) 2004-02-04 2008-11-25 Robert Bosch Gmbh Fuel injector with direct-controlled injection valve member
CN101382105B (zh) * 2007-09-07 2011-08-24 株式会社电装 燃料喷射阀
WO2012034749A1 (fr) * 2010-09-17 2012-03-22 Robert Bosch Gmbh Injecteur de carburant
WO2013087475A1 (fr) * 2011-12-12 2013-06-20 Continental Automotive Gmbh Soupape d'injection
EP3141738A1 (fr) * 2015-09-08 2017-03-15 Delphi Technologies, Inc. Rattrapeur de jeu hydraulique disposé dans un servo-injecteur

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19726125C2 (de) * 1997-06-20 1999-04-15 Telefunken Microelectron Verfahren zur Einspritzung von Kraftstoff
DE19727992C2 (de) * 1997-07-01 1999-05-20 Siemens Ag Ausgleichselement zur Kompensation temperaturbedingter Längenänderungen von elektromechanischen Stellsystemen
DE19742943C1 (de) * 1997-09-29 1999-04-22 Siemens Ag Vorrichtung in einem Einspritzventil zum Halten einer formschlüssigen Verbindung
DE19817320C1 (de) * 1998-04-18 1999-11-11 Daimler Chrysler Ag Einspritzventil für Kraftstoffeinspritzsysteme
DE19839125C1 (de) * 1998-08-27 2000-04-20 Siemens Ag Vorrichtung und Verfahren zur Dosierung von Fluid
DE19857338C1 (de) * 1998-12-11 2000-10-05 Siemens Ag Dosiervorrichtung
DE19858758C1 (de) * 1998-12-18 2000-09-07 Siemens Ag Vorrichtung und Verfahren zur Hubübertragung
DE19907931A1 (de) * 1999-02-24 2000-09-14 Siemens Ag Dosiervorrichtung
DE19914714C2 (de) * 1999-03-31 2001-09-20 Siemens Ag Injektor für Speicher-Kraftstoffeinspritzsysteme
DE50010902D1 (de) 1999-04-20 2005-09-15 Siemens Ag Fluiddosiervorrichtung
DE19942816A1 (de) * 1999-09-08 2001-03-22 Daimler Chrysler Ag Einspritzventil
DE19956830C2 (de) * 1999-11-25 2002-07-18 Siemens Ag Durchführung
DE10029629A1 (de) * 2000-06-15 2002-01-03 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10042231B4 (de) * 2000-08-28 2004-09-30 Siemens Ag Einspspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine sowie Verfahren zur Steuerung des Öffnungs-und Schließvorgangs einer Düsennadel eines Einspritzventils
DE10326046A1 (de) * 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen
DE112004001488D2 (de) * 2003-09-10 2006-07-27 Siemens Ag Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE10343950B4 (de) * 2003-09-23 2014-12-31 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10353045A1 (de) * 2003-11-13 2005-06-23 Siemens Ag Kraftstoffeinspritzventil
DE102004010668B4 (de) * 2004-03-04 2008-04-10 Sonplas Gmbh Verfahren und Vorrichtung zum Bearbeiten eines Bauteils
DE102004021920A1 (de) * 2004-05-04 2005-12-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004031308B4 (de) * 2004-06-29 2013-05-23 Robert Bosch Gmbh Hydraulischer Koppler
DE102004035313A1 (de) * 2004-07-21 2006-02-16 Robert Bosch Gmbh Kraftstoffinjektor mit zweistufigem Übersetzer
DE102004037124A1 (de) * 2004-07-30 2006-03-23 Robert Bosch Gmbh Common-Rail-Injektor
DE102004044461A1 (de) * 2004-09-15 2006-03-30 Robert Bosch Gmbh Einspritzdüse
DE102004045393B4 (de) * 2004-09-18 2014-12-31 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005015997A1 (de) * 2004-12-23 2006-07-13 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Steuerung des Einspritzventilgliedes
DE102005026514B4 (de) * 2005-02-18 2008-12-24 Robert Bosch Gmbh Einspritzdüse
DE102005009148A1 (de) 2005-03-01 2006-09-07 Robert Bosch Gmbh Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied mit Doppelsitz
DE102005015731A1 (de) * 2005-04-06 2006-10-12 Robert Bosch Gmbh Kraftstoffinjektor mit Piezoaktor
DE102005016796A1 (de) * 2005-04-12 2006-10-19 Robert Bosch Gmbh Zweistufig öffnender Kraftstoffinjektor
DE102005025141B3 (de) * 2005-06-01 2006-09-14 Siemens Ag Ventil
DE102005036444A1 (de) * 2005-08-03 2007-02-08 Robert Bosch Gmbh Einspritzdüse
DE102005054739B4 (de) * 2005-11-17 2017-06-08 Robert Bosch Gmbh Injektor zur Einspritzung von Kraftstoff in Brennräume von Brennkraftmaschinen, insbesondere piezoaktorgesteuerter Common-Rail-Injektor
DE102006019308A1 (de) * 2006-04-26 2007-10-31 Robert Bosch Gmbh Injektor
DE102006027327B4 (de) 2006-06-13 2018-08-02 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Nadelsteuerung
DE102007019528B3 (de) * 2007-04-25 2008-09-11 Siemens Ag Druckkompensierbares Einspritzventil mit hydraulischem Übersetzer
EP2083158A1 (fr) * 2008-01-22 2009-07-29 Delphi Technologies, Inc. Injecteur de carburant à commande piézo-électrique et son procédé de fonctionnement
DE102008002412A1 (de) 2008-06-13 2009-12-17 Robert Bosch Gmbh Kraftstoffinjektor
DE102008040086A1 (de) 2008-07-02 2010-01-07 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE102008035087B4 (de) * 2008-07-28 2015-02-12 Continental Automotive Gmbh Einspritzventil

Citations (4)

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DE3936619A1 (de) * 1989-11-03 1991-05-08 Man Nutzfahrzeuge Ag Verfahren zum einspritzen eines brennstoffes in einen brennraum einer luftverdichtenden, selbstzuendenden brennkraftmaschine, sowie vorrichtungen zur durchfuehrung dieses verfahrens
US5169067A (en) * 1990-07-30 1992-12-08 Aisin Seiki Kabushiki Kaisha Electromagnetically operated ultrasonic fuel injection device
DE4119467A1 (de) * 1991-06-13 1992-12-17 Daimler Benz Ag Vorrichtung zur kraft- und hubuebersetzung bzw. -uebertragung
US5335861A (en) * 1991-12-27 1994-08-09 Aisin Seiki Kabushiki Kaisha Fuel injecting apparatus

Family Cites Families (2)

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US4841936A (en) * 1985-06-27 1989-06-27 Toyota Jidosha Kabushiki Kaisha Fuel injection control device of an internal combustion engine
DE4306073C1 (de) * 1993-02-26 1994-06-01 Siemens Ag Zumeßvorrichtung für Fluide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936619A1 (de) * 1989-11-03 1991-05-08 Man Nutzfahrzeuge Ag Verfahren zum einspritzen eines brennstoffes in einen brennraum einer luftverdichtenden, selbstzuendenden brennkraftmaschine, sowie vorrichtungen zur durchfuehrung dieses verfahrens
US5169067A (en) * 1990-07-30 1992-12-08 Aisin Seiki Kabushiki Kaisha Electromagnetically operated ultrasonic fuel injection device
DE4119467A1 (de) * 1991-06-13 1992-12-17 Daimler Benz Ag Vorrichtung zur kraft- und hubuebersetzung bzw. -uebertragung
US5335861A (en) * 1991-12-27 1994-08-09 Aisin Seiki Kabushiki Kaisha Fuel injecting apparatus

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve
US5884848A (en) * 1997-05-09 1999-03-23 Cummins Engine Company, Inc. Fuel injector with piezoelectric and hydraulically actuated needle valve
WO2000017508A1 (fr) * 1998-09-23 2000-03-30 Robert Bosch Gmbh Soupape d'injection de carburant
DE10007735A1 (de) * 2000-02-19 2001-09-06 Daimler Chrysler Ag Einspritzventil
KR100853645B1 (ko) * 2001-07-09 2008-08-25 로베르트 보쉬 게엠베하 연료 분사 밸브
US7455244B2 (en) 2004-02-04 2008-11-25 Robert Bosch Gmbh Fuel injector with direct-controlled injection valve member
EP1865195A1 (fr) * 2006-06-07 2007-12-12 Robert Bosch Gmbh Dispositif destiné à la vaporisation de carburant
WO2008017538A1 (fr) * 2006-08-07 2008-02-14 Robert Bosch Gmbh Injecteur de carburant avec commande directe du pointeau et servosoupape d'assistance
US7946509B2 (en) 2006-08-07 2011-05-24 Robert Bosch Gmbh Fuel injector with direct needle control and servo valve support
DE102008000336A1 (de) 2007-03-13 2008-09-18 Denso Corp., Kariya Kraftstoffeinspritzventil
US7789322B2 (en) 2007-03-13 2010-09-07 Denso Corporation Fuel injection valve
DE102008000336B4 (de) 2007-03-13 2018-10-25 Denso Corporation Kraftstoffeinspritzventil
CN101382105B (zh) * 2007-09-07 2011-08-24 株式会社电装 燃料喷射阀
WO2012034749A1 (fr) * 2010-09-17 2012-03-22 Robert Bosch Gmbh Injecteur de carburant
WO2013087475A1 (fr) * 2011-12-12 2013-06-20 Continental Automotive Gmbh Soupape d'injection
EP3141738A1 (fr) * 2015-09-08 2017-03-15 Delphi Technologies, Inc. Rattrapeur de jeu hydraulique disposé dans un servo-injecteur

Also Published As

Publication number Publication date
ES2145446T3 (es) 2000-07-01
DE19519191A1 (de) 1996-12-19
EP0828936A1 (fr) 1998-03-18
EP0828936B1 (fr) 2000-03-22
DE19519191C2 (de) 1997-04-10
DE59604782D1 (de) 2000-04-27

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