EP0064146A1 - Système d'injection pour injecter deux combustibles par une seule buse d'injection - Google Patents

Système d'injection pour injecter deux combustibles par une seule buse d'injection Download PDF

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Publication number
EP0064146A1
EP0064146A1 EP82102059A EP82102059A EP0064146A1 EP 0064146 A1 EP0064146 A1 EP 0064146A1 EP 82102059 A EP82102059 A EP 82102059A EP 82102059 A EP82102059 A EP 82102059A EP 0064146 A1 EP0064146 A1 EP 0064146A1
Authority
EP
European Patent Office
Prior art keywords
main fuel
nozzle needle
fuel line
injection
nozzle
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
EP82102059A
Other languages
German (de)
English (en)
Other versions
EP0064146B1 (fr
Inventor
Heinz Küpper
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT82102059T priority Critical patent/ATE13931T1/de
Publication of EP0064146A1 publication Critical patent/EP0064146A1/fr
Application granted granted Critical
Publication of EP0064146B1 publication Critical patent/EP0064146B1/fr
Expired legal-status Critical Current

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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
    • 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
    • F02M43/04—Injectors peculiar thereto

Definitions

  • the invention relates to a device of the type specified in the preamble of the first claim.
  • an injection nozzle for injecting ignition fuel on the one hand and ignition-resistant main fuel on the other hand for diesel engines is known.
  • This injection nozzle has a separate feed for the main fuel and the pilot fuel to the nozzle needle seat.
  • the pilot fuel is deposited on one side and the main fuel on the other side of the nozzle needle above the seat.
  • a spring-loaded injection piston with differential pistons is provided in the pilot fuel channel, which is connected on its spring-loaded side via a branch channel to the main fuel channel.
  • the pilot fuel is supplied on the side opposite the spring-loaded piston side, so that the piston must be displaced by it against the pressure of the spring so that the necessary quantity of pilot fuel can be supplied.
  • the main fuel If the main fuel is then supplied, it can act on the spring-loaded side of the pre-injection piston via the branch channel and increases the pressure due to the differential piston in such a way that the nozzle needle is raised so that the pilot fuel is introduced into the combustion chamber is injected. Then the pressure of the pilot fuel collapses, the nozzle needle closes again, and only after a sufficient pressure has built up in the main fuel does it open again and allow the main fuel to enter the combustion chamber.
  • the disadvantage of this device is that since the pilot injection piston has to be displaced by the pilot fuel against the spring force, the pilot fuel has to be supplied at a relatively high pressure of 20 to 50 bar.
  • a differential piston must be connected downstream of the pilot injection piston so that the initially relatively low pressure of the main fuel can be transferred to the pilot fuel to such an extent that it can open the nozzle needle, since it must be ensured that the pilot fuel is always injected before the main fuel.
  • the object of the present invention is to provide an injection system of the type mentioned at the outset, with which a sufficient quantity of pilot fuel can be safely stored upstream of the nozzle needle, so that when it is opened, it emerges first.
  • the development according to claim 2 prevents the main fuel from penetrating into the pilot fuel system.
  • the arrangement in the immediate vicinity of the outlet opening results in an extremely small dead volume between the valve and the outlet opening. As a result, the two fuels are mixed slightly during the injection phase.
  • shut-off element which can be dimensioned according to claim 4. This results in the smallest possible dimensions, which has the advantage that a rapid closing and a low leakage are achieved when the injection process is started.
  • the single figure shows a cross section through an injection nozzle according to the invention.
  • the injection nozzle 1 consists, in a manner known per se, of the nozzle body 2, in which the nozzle needle 3 is arranged centrally and is held in the closed position by the force of the compression spring 6.
  • the nozzle body 2 is fastened to the nozzle holder 5 by a union nut 4.
  • the main fuel is fed into the nozzle holder 5 at 7 '. It passes through a rod filter 8 into an inlet bore 9, which can be closed by a piston 10, which is loaded by a spring 11.
  • the piston 10 and the spring 11 form a relief valve.
  • the piston 10 has a blind bore 10.1 which is equipped with drain openings 10.2 which are closed in the position shown.
  • the distance of the drain openings 10.2 from the seat of the piston 10 is a measure of the size of the relief volume. The greater this distance, the greater the relief volume.
  • the main fuel After passing through the piston 10, the main fuel reaches the pressure chamber 12, which is arranged concentrically around the nozzle needle 3.
  • the nozzle needle 3 has a inside the pressure chamber Pressure shoulder 3.1 so that it can be raised against the force of the compression spring at a corresponding pressure of the main fuel.
  • An annular channel 13 runs from the pressure chamber 12 to the nozzle needle seat surface. This ring channel is closed by the nozzle needle in the closed state. In the open state of the nozzle needle, the ring channel 13 merges into an intermediate bore 14, from which one or more spray holes 15 branch off.
  • the pilot fuel is preferably supplied according to the invention through the leakage system provided in conventional injectors.
  • the pilot fuel passes through its connecting line 16 and bores in the nozzle holder to the compression spring chamber 17 and from there to the nozzle needle.
  • the nozzle needle has a blind hole 18 in which a cylindrical insert 19 with a flattened side wall is inserted.
  • a gap 20 is formed between the flattened side wall and the nozzle needle inner wall.
  • a ball 22 and a spring 23, which together form a check valve and close it, are arranged in the bore 21.
  • the device according to the invention works as follows.
  • the injection valve 1 is in the position shown, i. H. the nozzle needle 3 is closed and the piston 10 is in its position shown. He can take this because a pressure relief valve is provided in the main fuel system, so that the pressure in the inlet bore 9 drops after the end of the injection process, so that the spring 11 can move the piston 10 into the position shown.
  • the pilot fuel Since the pilot fuel is to be injected first with every injection process, it must also be supplied first. For this purpose, it is supplied by a constant delivery pump with a pressure of .3 to 4 bar via the connecting line 16, the pressure spring chamber 17 into the gap 20 and from there via the central bore 21 to the check valve.
  • the spring 23 of the check valve is set such that the check valve opens at a pressure of 2 bar. As a result, the ignition fuel flows into the annular channel 13 via the outlet openings 24.
  • the main fuel remaining in the annular channel 13 from the last injection process is also without pressure, since the volume present between the piston 10 and the nozzle needle seat due to the closing movement of the piston 10 and the nozzle needle seat due to the closing movement of the piston 10, for example by 10 or 1 5 mm was enlarged. As a result, the pilot fuel easily gets into the ring channel and can accumulate around the nozzle needle tip.
  • the main fuel is then supplied under pressure.
  • the force of the spring 11 of the relief valve is dimensioned such that the main fuel can move the piston 10 so that the main fuel can flow via the discharge openings 10.2 to the pressure chamber 12 and from there into the annular channel 13.
  • Due to the pressure of the main fuel the nozzle needle is raised over the pressure shoulder 3.1.
  • the pilot fuel upstream of the nozzle needle seat can enter the combustion chamber via the intermediate bore 14 and the spray holes 15, followed by the main fuel.
  • both the nozzle needle 3 and the piston 10 close again.
  • the relief volume is thus formed again in the main fuel channel between the piston 10 and the nozzle needle seat surface, so that the pilot fuel can be supplied.
  • the check valve is also arranged as close as possible to the outlet openings 24 and has such a low mass that it can react without delay.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP82102059A 1981-05-06 1982-03-13 Système d'injection pour injecter deux combustibles par une seule buse d'injection Expired EP0064146B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102059T ATE13931T1 (de) 1981-05-06 1982-03-13 Einspritzsystem zum einspritzen zweier brennstoffe durch eine einspritzduese.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813117796 DE3117796A1 (de) 1981-05-06 1981-05-06 Einspritzsystem zum einspritzen zweier brennstoffe durch eine einspritzduese
DE3117796 1981-05-06

Publications (2)

Publication Number Publication Date
EP0064146A1 true EP0064146A1 (fr) 1982-11-10
EP0064146B1 EP0064146B1 (fr) 1985-06-19

Family

ID=6131527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102059A Expired EP0064146B1 (fr) 1981-05-06 1982-03-13 Système d'injection pour injecter deux combustibles par une seule buse d'injection

Country Status (4)

Country Link
US (1) US4465237A (fr)
EP (1) EP0064146B1 (fr)
AT (1) ATE13931T1 (fr)
DE (2) DE3117796A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104368A1 (fr) * 1982-08-31 1984-04-04 George Stan Baranescu Système d'injection avec charge de combustible stratifiée
EP0106183B1 (fr) * 1982-10-13 1987-01-28 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
EP0282819A2 (fr) * 1987-03-15 1988-09-21 Mitsubishi Jukogyo Kabushiki Kaisha Système d'injection pour un moteur à deux carburants
US5669334A (en) * 1994-02-11 1997-09-23 Mtu Motoren-Und Turbinen-Union Friedrichshafen Gmbh Injection valves for liquid-fuel mixtures and associated processes
EP3163067A1 (fr) * 2015-10-30 2017-05-03 Caterpillar Inc. Injecteur de carburant, ensemble injecteur de carburant et procédé associé

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2526856B2 (ja) * 1984-12-19 1996-08-21 トヨタ自動車株式会社 二種の燃料を順次に噴射可能な燃料噴射装置
DE3770275D1 (de) * 1986-07-30 1991-06-27 Elsbett L Einspritzvorrichtung zum einbringen von kraftstoffen in den brennraum einer brennkraftmaschine.
US5311902A (en) * 1991-07-02 1994-05-17 Overfield Norbert W Reciprocating compressor valve
US5899385A (en) * 1995-07-21 1999-05-04 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE602006008377D1 (de) * 2005-04-28 2009-09-24 Delphi Tech Inc Einspritzdüse
DE602007011961D1 (de) 2006-10-13 2011-02-24 Parker Hannifin Corp Dreiweg-tellerventil
US9068539B2 (en) 2012-08-03 2015-06-30 Caterpillar Inc. Dual check fuel injector and fuel system using same
GB201309122D0 (en) 2013-05-21 2013-07-03 Delphi Tech Holding Sarl Fuel Injector
DE102015015518B4 (de) 2015-11-26 2023-04-27 Hermann GOLLE Kraftstoff/Luft-Einspritzsystem für Verbrennungsmotoren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE568366C (de) * 1931-12-09 1933-01-18 Fried Krupp Germaniawerft Akt Brennstoffnadelventil fuer Einspritzbrennkraftmaschinen
DE577810C (de) * 1932-02-13 1933-06-06 Motorenfabrik Herford Ges M B Einspritzvorrichtung fuer zwei verschiedene Brennstoffe
DE969853C (de) * 1952-12-25 1958-07-24 Maschf Augsburg Nuernberg Ag Einrichtung zur Verwendung verschiedener Brennstoffarten und -mengen bei Einspritzduesen von Brennkraftmaschinen
DE2908375A1 (de) * 1979-03-03 1980-09-11 Klaus Dipl Ing Starke Dieselmotorisches verfahren mit einer vorrichtung zum betrieb mit zwei fluessigen kraftstoffen unter verwendung zweier einspritzpumpensysteme und einer kraftstoffduese
DE2924128A1 (de) * 1979-06-15 1980-12-18 Motoren Werke Mannheim Ag Einrichtung zur einspritzung von zuendkraftstoff einerseits und zuendunwilligem hauptkraftstoff andererseits fuer dieselmotoren

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR484774A (fr) * 1916-03-14 1917-11-06 Edward Gardner Perfectionnements aux injecteurs de combustibles pour moteurs à combustion interne
GB120609A (en) * 1917-11-10 1918-11-11 Kenneth Irwin Crossley Improvements in Oil Fuel Injection Devices for Internal Combustion Engines.
DE479273C (de) * 1925-11-03 1929-07-13 Motorenfabrik Deutz Akt Ges Einspritzvorrichtung fuer Dieselmotoren mit Zuendoelvorlagerung
CH172170A (de) * 1933-12-22 1934-09-30 Sulzer Ag Brennstoffpumpe für mit Zünd- und Treibbrennstoff arbeitende Brennkraftmaschinen.
DE849325C (de) * 1940-09-19 1952-09-15 Bosch Gmbh Robert Einspritzventil fuer Brennkraftmaschinen
CH234210A (de) * 1943-05-29 1944-09-15 Sulzer Ag Verfahren und Einrichtung zum Einspritzen unter Druck von zündträgem Brennstoff.
US2602703A (en) * 1947-09-22 1952-07-08 Atlas Diesel Ab Fuel injection valve
CH305822A (de) * 1950-11-17 1955-03-15 Nat Res Dev Brennstoffeinspritzeinrichtung mit einer Einspritzdüse und einer Kolbenpumpe.
GB1357887A (en) * 1970-11-05 1974-06-26 Cav Ltd Fuel injection system for an internal combustion engine
AT349834B (de) * 1974-12-19 1979-04-25 Friedmann & Maier Ag Brennstoffeinspritzpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE568366C (de) * 1931-12-09 1933-01-18 Fried Krupp Germaniawerft Akt Brennstoffnadelventil fuer Einspritzbrennkraftmaschinen
DE577810C (de) * 1932-02-13 1933-06-06 Motorenfabrik Herford Ges M B Einspritzvorrichtung fuer zwei verschiedene Brennstoffe
DE969853C (de) * 1952-12-25 1958-07-24 Maschf Augsburg Nuernberg Ag Einrichtung zur Verwendung verschiedener Brennstoffarten und -mengen bei Einspritzduesen von Brennkraftmaschinen
DE2908375A1 (de) * 1979-03-03 1980-09-11 Klaus Dipl Ing Starke Dieselmotorisches verfahren mit einer vorrichtung zum betrieb mit zwei fluessigen kraftstoffen unter verwendung zweier einspritzpumpensysteme und einer kraftstoffduese
DE2924128A1 (de) * 1979-06-15 1980-12-18 Motoren Werke Mannheim Ag Einrichtung zur einspritzung von zuendkraftstoff einerseits und zuendunwilligem hauptkraftstoff andererseits fuer dieselmotoren

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104368A1 (fr) * 1982-08-31 1984-04-04 George Stan Baranescu Système d'injection avec charge de combustible stratifiée
EP0106183B1 (fr) * 1982-10-13 1987-01-28 Robert Bosch Gmbh Injecteur de carburant pour moteurs à combustion interne
EP0282819A2 (fr) * 1987-03-15 1988-09-21 Mitsubishi Jukogyo Kabushiki Kaisha Système d'injection pour un moteur à deux carburants
EP0282819A3 (en) * 1987-03-15 1990-01-17 Mitsubishi Jukogyo Kabushiki Kaisha Injection system for a dual-fuel engine
US5669334A (en) * 1994-02-11 1997-09-23 Mtu Motoren-Und Turbinen-Union Friedrichshafen Gmbh Injection valves for liquid-fuel mixtures and associated processes
EP3163067A1 (fr) * 2015-10-30 2017-05-03 Caterpillar Inc. Injecteur de carburant, ensemble injecteur de carburant et procédé associé
CN106640464A (zh) * 2015-10-30 2017-05-10 卡特彼勒公司 燃料喷射器、燃料喷射器组件以及相关方法
US10851753B2 (en) 2015-10-30 2020-12-01 Caterpillar Inc. Fuel injector, a fuel injector assembly and an associated method

Also Published As

Publication number Publication date
US4465237A (en) 1984-08-14
DE3117796A1 (de) 1982-11-25
ATE13931T1 (de) 1985-07-15
EP0064146B1 (fr) 1985-06-19
DE3264208D1 (en) 1985-07-25

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