EP0316331B1 - Dispositif d'injection pour l'introduction de carburants dans la chambre de combustion de moteurs a combustion interne - Google Patents

Dispositif d'injection pour l'introduction de carburants dans la chambre de combustion de moteurs a combustion interne Download PDF

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Publication number
EP0316331B1
EP0316331B1 EP87904836A EP87904836A EP0316331B1 EP 0316331 B1 EP0316331 B1 EP 0316331B1 EP 87904836 A EP87904836 A EP 87904836A EP 87904836 A EP87904836 A EP 87904836A EP 0316331 B1 EP0316331 B1 EP 0316331B1
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EP
European Patent Office
Prior art keywords
pressure
fuel
nozzle
chamber
injection device
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.)
Expired - Lifetime
Application number
EP87904836A
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German (de)
English (en)
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EP0316331A1 (fr
Inventor
Ludwig Elsbett
Guenter Elsbett
Klaus Elsbett
Konrad Weigel
Lutz Guenther
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Elsbett Guenter
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Elsbett Guenter
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Application filed by Elsbett Guenter filed Critical Elsbett Guenter
Priority to AT87904836T priority Critical patent/ATE63780T1/de
Publication of EP0316331A1 publication Critical patent/EP0316331A1/fr
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Publication of EP0316331B1 publication Critical patent/EP0316331B1/fr
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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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an injection device for introducing fuels into the combustion chamber of an internal combustion engine, which pump element, pressure relief valve, injection nozzle, pressure line and on the back of the nozzle needle accommodates a spring chamber for receiving a spring for resetting the nozzle needle, the pressure line in one of the spring chamber separate nozzle chamber opens, in which the fuel pressure acts via a needle surface against the spring and wherein at least one additional fuel is optionally introduced into the pressure line via at least one additional connection which is attached to the nozzle holder during the pressure-relieved phase of the injection into the pressure line the first fuel delivered by the pump element is different.
  • Existing devices of common injection technology which can be regarded as state of the art, such as pump element, pressure relief valve, injection nozzle, pressure line, etc., which have previously served to introduce only one fuel, are to be used.
  • the introduction of several fuels can be solved via a nozzle so that additional holes for additional fuels are provided in the injection nozzle up to the nozzle tip.
  • the introduction of fuels through an additional hole in the nozzle needle, cf. DE-A 30 12 418, requires high manufacturing efforts and is only conceivable with appropriately large nozzle needles.
  • EP-A 0 104 368 apparently deals with a system without a relief valve; however, it proposes to use two collecting tanks for the leakage fuel, one of which should hold only one fuel, the second of which should hold the mixed fuel.
  • DE-OS 31 17 796 an injection valve is known, in which only a check valve is provided, which is installed in the line leading from the spring chamber to the nozzle chamber.
  • DE-OS 29 22 682 shows an injection valve in which water is supplied via the spring chamber. However, the water outlet channel ends in the valve seat or in a bore open to the combustion chamber.
  • the object of the invention is to develop an injection device for the use of secondary fuels which on the one hand solves the leakage problem and on the other hand uses an injection nozzle that is easy to manufacture.
  • the object is achieved by introducing the second fuel via a pressure-relieved space which can be separated from the pressure line by means of a non-return valve and which also includes the spring space, this space attached to the rear end of the nozzle needle through the first non-return valve leading to the pressure line and through an oppositely acting one.
  • the second check valve leading to the at least one additional connection is limited, the first check valve being arranged in the nozzle holder near the pressure line and releasing the connection between the pressure-relieved space and the pressure line during the pressure-relieved phase of the pressure line and second fuel and / or leakage fuel flowing into the pressure line lets and during the pressure phase of the pressure line closes this connection, the second check valve is also arranged in the nozzle holder and the connection between the pressure-relieved space and the releases at least one additional connection during the pressure-relieved phase of the pressure line and thus access for the secondary fuel into the pressure-relieved space and closes this connection with the at least one additional connection during the pressure phase of the pressure line.
  • a separate delivery system for secondary fuels can be dispensed with by adding the additional fuels to the existing system, and additional discharge systems can be dispensed with by the leakage fuel not leaving the existing system. This means a substantial saving in devices; the system can also be easily retrofitted to internal combustion engines that are already in operation.
  • the introduction of the secondary fuels works via a separate pump that builds up the necessary pressure to deliver secondary fuels into the pressure-relieved space, which also includes the spring chamber, during the relaxation phase of the injection pump of the injection system and from there into the high-pressure line between the pressure relief valve space of the injection pump and to promote the nozzle needle valve space of the nozzle.
  • the desired amount of the additional fuel to be added depends on the size of the relief valve, the fuel elasticity and the pressure of the pump and can be designed according to these parameters so that e.g. a fuel mixture of main and secondary fuels is created or only secondary fuels or only one secondary fuel are introduced.
  • the secondary fuel (s) are required to ignite the internal combustion engine, it is advisable to regulate the amount of fuel to be introduced into the injection system so that it corresponds exactly to the amount injected at this speed.
  • the main fuel coming from the injection pump has an oscillating effect, the fuel only pushing itself forward, which in the injection phase is caused by the pressure of the injection pump in one direction and the pressure relief phase of the injection pump is pushed back by the feed pump of the secondary fuel (s). In this case, only secondary fuel is injected and no mixing takes place.
  • the first fuel then only serves as a means for hydraulically transferring the power of the feed pump to the second fuel.
  • a device can be attached which connects the switching off of the internal combustion engine with a brief delivery of the secondary fuel, so that there is secondary fuel at the nozzle needle tip for the starting process of the internal combustion engine .
  • the figure shows an injection device consisting of injection pump, injection line and injection nozzle in a manner known per se.
  • a pump plunger 11 oscillates in the pump element 1.
  • the fuel flows through the fuel connection 10 through a bore 16 into the pump element 1 until the lifting pump plunger 11 covers this bore with its upper edge, so that the connection between the connection 10 and the space 19 is interrupted via the pump ram 11.
  • This device which is known per se, is now supplemented by at least one further fuel connection 7.
  • secondary fuel can be introduced into the pressure-relieved space, which also includes the spring chamber 5, and from there into the high-pressure part 4 between the space 17 and are introduced into the spring chamber 18, to the extent that the fuel already in it yields.
  • the pressure of the secondary fuel introduced via port 7 must not be so high that the injection needle 12 opens. Only when the pump plunger 11 conveys will the pressure become so high that the nozzle opens.
  • a check valve 13 now prevents the fuel from flowing into the pressure-relieved space, while a further check valve 14 prevents leakage fuel from the pressure-relieved space from entering the line 7 for the second fuel.
  • the adjusting disc 9 for adjusting the nozzle opening pressure is drilled towards the pressure line 4, and there is a space between the rear nozzle needle end and the two oppositely acting valves 13 and 14, which also includes the spring chamber 5.

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

Abstract

La partie haute pression de pompes d'injection et d'injecteurs de moteurs diesel n'est sous une haute pression que pendant un certain cycle. La plupart du temps, la conduite à haute pression (4) est détendue. Pendant ce temps, un deuxième carburant peut être introduit par un raccord supplémentaire (7) dans la partie haute pression, dans la mesure où le carburant qui y est déjà contenu se laisse comprimer sans ouvrir l'injecteur (6, 3, 12). Les cycles à haute pression suivants font avancer graduellement ce deuxième carburant jusqu'à l'ouverture de l'injecteur.

Claims (7)

1. Dispositif d'injection destiné à introduire des carburants dans la chambre de combustion d'un moteur thermique, ce dispositif comportant un élément de pompe (1), une soupape de décharge de pression (2), une buse d'injection (3), une conduite d'alimentation en carburant sous pression (4) et, à l'arrière de l'aiguille-pointeau (12), une chambre à ressort (5) qui contient le ressort de rappel de l'aiguille-pointeau (12) et qui récupère aussi le carburant de fuite de l'aiguille-pointeau (12), la conduite d'alimentation (4) débouchant dans une chambre distincte de la chambre à ressort (5), dans laquelle la pression du carburant s'exerce contre une surface de l'aiguille-pointeau à l'encontre de la force opposée par le ressort de rappel, avec, au choix, amenée dans la conduite d'alimentation (4), durant la phase hors pression de l'injection, d'au moins un deuxième carburant par le biais d'au moins un raccord supplémentaire (7) fixé sur le porte-injecteur (6), ce deuxième carburant étant différent de celui refoulé par l'élément de pompe (1), le dispositif étant caractérisé par le fait que l'amenée du deuxième carburant s'effectue par une chambre hors pression, séparée de la conduite d'alimentation en carburant sous pression (4) par un premier clapet anti-retour (13) et qui englobe la chambre à ressort (5), cette chambre se situant à l'extrémité arrière de l'aiguille-pointeau (12) et étant délimitée d'une part par le premier clapet anti-retour (13) vers la conduite d'alimentation (4) et d'autre part par le deuxième clapet anti-retour à action inverse (14) vers le (ou les) raccord supplémentaire (7), le premier clapet anti-retour (13) étant disposé dans le porte-injecteur (6) à proximité de la conduite d'alimentation (4) et autorisant la communication entre la chambre hors pression et la conduite d'alimentation (4) durant la phase hors pression de la conduite d'alimentation (4), permettant ainsi au deuxième carburant et/ou au carburant de fuite de refluer dans la conduite d'alimentation (4), et coupant cette communication lorsque la conduite d'alimentation (4) est sous pression, le deuxième clapet anti-retour (14) étant également disposé dans le porte-injecteur et autorisant la communication entre le (ou les) raccord supplémentaire (7) et la chambre hors pression durant la phase hors pression de la conduite d'alimentation (4), permettant ainsi au deuxième carburant de pénétrer dans la chambre hors pression, et coupant cette communication vers le (ou les) raccord (7) lorsque la conduite d'alimentation (4) est sous pression.
2. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que la quantité de deuxième carburant parvenant par le raccord (7) par cycle d'injection atteigne au maximum la quantité de carburant injecté au cours du cycle précédent.
3. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que des rondelles percées (9) sont prévues pour ajuster la pression d'ouverture de la buse.
4. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que le rapport de mélange entre premier et deuxième carburant peut être dosé par la commande du débit de deuxième carburant.
5. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que le rapport de mélange après activation de l'alimentation supplémentaire en deuxième carburant est réglé sur une valeur fixe, de préférence sur 100% de deuxième carburant.
6. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que l'alimentation en deuxième carburant ne prend effet qu'immédiatement avant l'arrêt du moteur, le nombre de tours de moteur nécessaire étant tel que le deuxième carburant parvienne dans la chambre de pression de de l'aiguille-pointeau (17), de façon à être injecté immédiatement à la remise en marche.
7. Dispositif d'injection conforme à la revendication 1, caractérisé par le fait que le premier carburant est une huile végétale.
EP87904836A 1986-07-30 1987-07-24 Dispositif d'injection pour l'introduction de carburants dans la chambre de combustion de moteurs a combustion interne Expired - Lifetime EP0316331B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87904836T ATE63780T1 (de) 1986-07-30 1987-07-24 Einspritzvorrichtung zum einbringen von kraftstoffen in den brennraum einer brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3625716 1986-07-30
DE3625716 1986-07-30

Publications (2)

Publication Number Publication Date
EP0316331A1 EP0316331A1 (fr) 1989-05-24
EP0316331B1 true EP0316331B1 (fr) 1991-05-22

Family

ID=6306273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904836A Expired - Lifetime EP0316331B1 (fr) 1986-07-30 1987-07-24 Dispositif d'injection pour l'introduction de carburants dans la chambre de combustion de moteurs a combustion interne

Country Status (8)

Country Link
US (1) US4825830A (fr)
EP (1) EP0316331B1 (fr)
AU (1) AU7753987A (fr)
BR (1) BR8704171A (fr)
DE (1) DE3770275D1 (fr)
MX (1) MX161561A (fr)
RU (1) RU1838658C (fr)
WO (1) WO1988001019A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19823335A1 (de) * 1998-05-26 1999-12-02 Elsbett G Einspritzsystem für den Betrieb mit unterschiedlichen Kraftstoffen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241935A (en) * 1988-02-03 1993-09-07 Servojet Electronic Systems, Ltd. Accumulator fuel injection system
DE4422552C1 (de) * 1994-06-28 1995-11-30 Daimler Benz Ag Verfahren zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine
US5537972A (en) * 1994-07-28 1996-07-23 Servojet Electronics Systems Fuel injection system having a pressure intensifier incorporating an overtravel safety feature
US5833146A (en) * 1996-09-09 1998-11-10 Caterpillar Inc. Valve assembly with coupled seats and fuel injector using same
DE19650559C1 (de) 1996-12-05 1998-03-26 Mtu Friedrichshafen Gmbh Anschlußelement zum Einleiten von Brennstoff und einem zweiten Fluid in ein Einspritzventil
US8191534B2 (en) * 2008-02-28 2012-06-05 General Electric Company High viscosity fuel injection pressure reduction system and method

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE2922682A1 (de) * 1979-06-02 1980-12-04 Daimler Benz Ag Einspritzduese fuer luftverdichtende einspritzbrennkraftmaschinen
DE3012418A1 (de) * 1980-03-29 1981-10-08 Klöckner-Humboldt-Deutz AG, 5000 Köln Kraftstoffeinspritzventil fuer brennkraftmaschinen
DE3117796A1 (de) * 1981-05-06 1982-11-25 Klöckner-Humboldt-Deutz AG, 5000 Köln Einspritzsystem zum einspritzen zweier brennstoffe durch eine einspritzduese
EP0104368A1 (fr) * 1982-08-31 1984-04-04 George Stan Baranescu Système d'injection avec charge de combustible stratifiée

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DE517292C (de) * 1929-11-23 1931-02-03 Heinrich Lanz Ag Vorrichtung zum Foerdern verschiedenartiger Fluessigkeiten mittels einer einzigen Pumpe und einer einzigen Druckleitung mit nur einem Druckventil
DE925139C (de) * 1950-03-05 1955-03-14 Siegfried Dr-Ing Meurer Verfahren und Vorrichtung zum Einspritzen von Zusatzstoffen in Dieselmotoren
DE969853C (de) * 1952-12-25 1958-07-24 Maschf Augsburg Nuernberg Ag Einrichtung zur Verwendung verschiedener Brennstoffarten und -mengen bei Einspritzduesen von Brennkraftmaschinen
FR1313716A (fr) * 1960-01-22 1963-01-04 Inst Francais Du Petrole Nouveau dispositif d'injection
GB1061996A (en) * 1963-08-28 1967-03-15 Od I Inginerov Morskovo Flota A valve unit for diesel engine injection systems
US3308794A (en) * 1964-12-21 1967-03-14 Caterpillar Tractor Co Engine fuel system
JPS5113806B2 (fr) * 1971-10-20 1976-05-04
DE2715137A1 (de) * 1977-04-05 1978-10-19 Daimler Benz Ag Kraftstoffeinspritzanlage fuer luftverdichtende brennkraftmaschinen
ES477347A1 (es) * 1978-03-21 1979-10-16 Lucas Industries Ltd Sistema de combustible para un motor de combustion interna policilindrico.
US4612905A (en) * 1980-01-26 1986-09-23 Motoren-Werke Mannheim Ag, Vorm. Benz Stat. Motorenba Fuel injection apparatus
US4481921A (en) * 1982-05-26 1984-11-13 Nippondenso Co., Ltd. Fuel injection apparatus of internal combustion engine
IT1189339B (it) * 1982-08-18 1988-02-04 Edoardo Costarelli Essiccatore a coclea,in particolar modo per materiali plastici
JPS61171874A (ja) * 1985-01-28 1986-08-02 Nippon Denso Co Ltd ２種燃料噴射装置
US4693227A (en) * 1985-05-21 1987-09-15 Toyota Jidosha Kabushiki Kaisha Multi-fuel injection system for an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922682A1 (de) * 1979-06-02 1980-12-04 Daimler Benz Ag Einspritzduese fuer luftverdichtende einspritzbrennkraftmaschinen
DE3012418A1 (de) * 1980-03-29 1981-10-08 Klöckner-Humboldt-Deutz AG, 5000 Köln Kraftstoffeinspritzventil fuer brennkraftmaschinen
DE3117796A1 (de) * 1981-05-06 1982-11-25 Klöckner-Humboldt-Deutz AG, 5000 Köln Einspritzsystem zum einspritzen zweier brennstoffe durch eine einspritzduese
EP0104368A1 (fr) * 1982-08-31 1984-04-04 George Stan Baranescu Système d'injection avec charge de combustible stratifiée

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* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Bd.10, Nr.163 (M-487)(2219), 11.06.1986 *
Patent Abstracts of Japan, Bd.9, Nr.238 (M-416)(1961), 25.09.1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19823335A1 (de) * 1998-05-26 1999-12-02 Elsbett G Einspritzsystem für den Betrieb mit unterschiedlichen Kraftstoffen
DE19823335C2 (de) * 1998-05-26 2001-05-31 Elsbett G Einspritzsystem für den Betrieb mit unterschiedlichen Kraftstoffen

Also Published As

Publication number Publication date
MX161561A (es) 1990-11-06
DE3770275D1 (de) 1991-06-27
AU7753987A (en) 1988-02-24
EP0316331A1 (fr) 1989-05-24
RU1838658C (ru) 1993-08-30
US4825830A (en) 1989-05-02
BR8704171A (pt) 1988-04-12
WO1988001019A1 (fr) 1988-02-11

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