EP0528150B1 - System und Verfahren zum Zuführen von Brennstoff zu einem eine Mischung aus Kleinpartikeln und Brennstoff verbrennenden Dieselmotor - Google Patents

System und Verfahren zum Zuführen von Brennstoff zu einem eine Mischung aus Kleinpartikeln und Brennstoff verbrennenden Dieselmotor Download PDF

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Publication number
EP0528150B1
EP0528150B1 EP92111211A EP92111211A EP0528150B1 EP 0528150 B1 EP0528150 B1 EP 0528150B1 EP 92111211 A EP92111211 A EP 92111211A EP 92111211 A EP92111211 A EP 92111211A EP 0528150 B1 EP0528150 B1 EP 0528150B1
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EP
European Patent Office
Prior art keywords
fuel
oil
valve
pressure
reservoir section
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
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EP92111211A
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English (en)
French (fr)
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EP0528150A1 (de
Inventor
Hiroshi c/o Nagasaki Res. & Dev. Center Nakagawa
Yuuji c/o Nagasaki Res. & Dev. Center Oda
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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    • 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
    • F02M43/02—Pumps 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • 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 present invention relates to a system and a method for feeding fuel to a diesel engine which make use of fuel oil containing fine particles of solid fuel such as pulverized coal or the like.
  • a prior art fuel injection system for a diesel engine using a high cetane number auxiliary fuel for the burning process is described in EP-A-0 282 819.
  • This known system comprises an injection valve including a needle valve, an oil reservoir provided in the injection valve, a fuel feed pipe for supplying an amount of auxiliary fuel determined by a control valve from an auxiliary fuel tank through a check valve to the oil reservoir.
  • a high pressure pump feeds main fuel from a main fuel tank under pressure to the oil reservoir in the injection valve.
  • a recirculation valve is provided which opens and closes periodically with the action of a pump plunger and the control valve in the auxiliary fuel feed pipe which in return is controlled by a control unit in accordance with the pump action.
  • a method and an apparatus for injecting coal slurry fuel containing fine solid particles into a diesel engine combustion chamber is known from US-A-4 862 837 which represents the closest state of the art.
  • the coal slurry fuel is fed by means of a pump from a fuel tank through a check valve to an oil reservoir within an injection valve comprising a needle valve.
  • the fuel in the reservoir is pressurized by high pressure oil pressurized in a high pressure pump and fed to a diaphragm pump through which the pressure is applied to the coal slurry fuel without mixing the pressure oil and the fuel. Due to the pressure transmission through the diaphragm pump the injection is perfomed by means of a vortex swirl nozzle at a relatively low pressure.
  • there is a danger of wear of the portions being in contact with the pressurized coal slurry fuel since there is a comparatively long distance for transportion of the pressurized coal slurry fuel from the diaphragm pump to the injection valve.
  • a fuel feed system for a fine-particle-mixed fuel burning diesel engine for feeding fuel oil containing fine particles of solid fuel into said diesel engine to be burnt, comprising an injection valve including a needle valve for opening and closing a path between an oil reservoir section provided within said injection valve and a nozzle hole; a fuel feed pipe provided between the oil reservoir section and a fuel tank for said fuel containing fine particles; a control valve provided within said fuel feed pipe for controlling an amount of fuel flowing through said fuel feed pipe; a check valve provided within said injection valve for allowing only flow of fuel from said control valve towards said oil reservoir section; a high-pressure pump for pressurizing oil fed from an oil tank; a pressure wave propagation pipe connecting a delivery port of said high-pressure pump and said oil reservoir section in the injection valve; a recirculation valve for opening and closing said pressure wave propagation pipe; a recirculation pipe provided between said recirculation valve and said oil tank; and a control device for controlling opening and closing of said recirculation
  • the fuel feed system of the present invention comprises a control rack detector for detecting a position of a control rack which controls a delivery amount of said high-pressure pump and for delivering a detection signal to said control device.
  • a method for feeding fuel to a fine-particle-mixed fuel burning diesel engine in which fuel oil containing fine particles of solid fuel is to be burnt, comprising the steps of: feeding said fuel oil containing fine particles of solid fuel in a predetermined amount from a fuel tank to an oil reservoir section within an injection valve by means of a pump; pressurizing high-pressure oil fed from an oil tank by means of a high-pressure pump and delivering said pressurized oil through a pressure wave propagation pipe towards said oil reservoir section so as to thereby pressurize the fuel within said oil reservoir section; injecting the thus pressurized fuel contained in the oil reservoir section through a nozzle hole of the injection valve; recirculating said pressurized oil back to said oil tank through a recirculation pipe as soon as the predetermined amount of fuel contained in the oil reservoir section is injected from the nozzle hole so as to not inject said pressurized oil through the nozzle hole.
  • the above method for feeding fuel to a fine-particle-mixed fuel burning diesel engine preferably further comprises the steps of determining a delivery amount of said pressurized oil of the high-pressure pump and controlling said predetermined amount of fuel containing fine particles of solid fuel fed from the fuel tank to the oil reservoir section in accordance therewith.
  • fuel containing fine particles of the amount controlled by the control valve which is in turn controlled by the control device, is sent from the fuel tank through the fuel feed pipe to the oil reservoir in the fuel injection valve.
  • the oil within the oil tank is pressurized by the high-pressure pump, and a pressure wave of the oil is transmitted to the above-mentioned oil reservoir through the pressure wave propagation pipe, and the above-mentioned fuel containing fine particles which is present within the oil reservoir is injected through the nozzle hole of the injection valve.
  • the oil sent to the injection valve through the recirculation valve controlled by the control device is returned to the oil tank, and so, deterioration of the oil can be precluded.
  • fuel containing fine particles is never fed to the high-pressure pump, hence seizure of the plunger of the same pump does not occur, and also, only the fuel containing fine particles is injected through the nozzle hole of the injection valve.
  • a detection signal issued from the control rack detector for detecting a position of the control rack which controls a delivery amount of the high-pressure pump is input to the control device, and the amount of fuel containing fine particles to be fed to the oil reservoir is controlled on the basis of the amount of oil delivered from the high-pressure pump by the control device, only the same fuel containing fine particles is surely injected through the nozzle hole of the injection valve, and the oil propagating the pressure wave can be prevented from being injected through the nozzle hole.
  • reference numeral 1 designates an oil tank which accommodates oil for propagating a pressure wave to a fuel valve
  • numeral 2 designates an oil feed pump
  • numeral 3 designates a high-pressure injection pump
  • numeral 4 designates a plunger
  • numeral 5 designates a barrel
  • numeral 6 designates a delivery valve
  • numeral 7 designates a pressure-regulating check valve
  • numeral 8 designates a pressure wave propagation pipe
  • numeral 9 designates a fuel injection valve
  • numeral 10 designates a nozzle hole
  • numeral 11 designates a needle valve
  • numeral 12 designates an oil reservoir section
  • numeral 13 designates a check valve
  • numeral 14 designates a spring
  • numeral 15 designates a feed pipe
  • numeral 16 designates a control valve
  • numeral 17 designates a fuel feed pipe
  • numeral 18 designates a fuel feed pump
  • numeral 19 designates a fuel tank for fuel containing fine particles of coal
  • numeral 20 designates a control
  • Fuel containing fine particles of coal is fed by the fuel feed pump 18 from the fuel tank 19 through the fuel feed pipe 17 and enters the control valve 16, and during a pause period of fuel injection and after circulation of the oil in the pressure propagation pipe 8 has finished, a predetermined amount of fuel containing fine particles of coal is sent into the fuel injection valve 9 through the feed pipe 15.
  • the recirculation valve 21 is opened via the drive motor 21' as controlled by the control device 20, thereby the oil for use in pressure wave propagation is recirculated via the recirculation pipe 22 to the oil tank 1, and so, deterioration of the oil can be prevented.
  • fuel containing fine particles of solid fuel can be injected at a high pressure from an injection valve into a combustion chamber without introducing such fine-particle-mixed fuel into a barrel (plunger chamber) in a high-pressure pump.
  • seizure of a high-pressure pump plunger caused by fine particles of solid fuel having a high hardness can be precluded, and in addition, since provision is made such that the oil for propagating a pressure wave from a high-pressure pump is also circulated, the fault in propagation of a hydraulic pressure due to deterioration of oil can be also eliminated.

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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)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (6)

  1. Brennstoffzuführsystem für einen mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor zum Zuführen eines feine Teilchen eines festen Brennstoffs enthaltenden Brennöls in den Dieselmotor für Verbrennung, umfassend:
    ein Einspritzventil (9) mit einem Nadelventil (11) zum Öffnen und Schließen einer Strecke zwischen einer im Einspritzventil (9) vorgesehenen Ölreservoirsektion (12) und einer Düsenbohrung (10),
    ein zwischen der Ölreservoirsektion (12) und einem Brennstoffbehälter (19) für den Feinteilchen enthaltenden Brennstoff vorgesehenes Brennstofförderrohr (15), (und)
    eine Hochdruckpumpe (3), um aus einem Ölbehälter (1) zugeführtes Öl unter Druck zu setzen, gekennzeichnet durch
    ein im Brennstofförderrohr (15) vorgesehenes Regelventil (16) zum Regeln einer durch das Brennstofförderrohr (15) strömenden Brennstoffmenge,
    ein im Einspritzventil (9) vorgesehenes Rückschlagventil (13), das Brennstoff nur vom Regelventil (16) zur Ölreservoirsektion (12) strömen läßt,
    ein Druckwellenausbreitungsrohr (8), das eine Lieferöffnung der Hochdruckpumpe (3) mit der Ölreservoirsektion (12) im Einspritzventil (9) verbindet,
    ein Rückförderventil (21) zum Öffnen und Schließen des Druckwellenausbreitungsrohrs (8),
    ein zwischen dem Rückförderventil (21) und dem Ölbehälter (1) vorgesehenes Rückförderrohr (22) und
    eine Steuervorrichtung (20) zum Steuern des Öffnens und Schließens des Rückförderventils (21) und des Regelventils (16), so daß nach Beendigung der Brennstoffeinspritzung das Rückförderventil (21) geöffnet wird, um damit Öl zur Verwendung bei der (für die) Druckwellenausbreitung über das Rückförderrohr (22) zum Ölbehälter (1) derart zurückzufördern, daß das für die Druckwellenausbreitung verwendete Öl nicht eingespritzt wird.
  2. Brennstoffzuführsystem für einen mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor nach Anspruch 1, ferner umfassend einen Regelstangendetektor (23) zum Detektieren einer Stellung einer Regelstange (24), die eine Liefermenge der Hochdruckpumpe (3) regelt, und zum Liefern eines Detektionssignals zur Steuervorrichtung (20).
  3. Brennstoffzuführsystem für einen mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor nach Anspruch 1 oder 2, wobei
    in der Hochdruckpumpe (3) ein Druckregel-Rückschlagventil (7) vorgesehen ist, das nur eine Rückströmung vom Druckwellenausbreitungsrohr (8) in die Hochdruckpumpe (3) zuläßt,
    ein Ventilöffnungsdruck (PR) des Druckregel-Rückschlagventils (7) und ein Ventilöffnungsdruck (PP) des Rückschlagventils (13) sowie ein Ventilöffnungsdruck (PN) des Nadelventils (11) so voreingestellt oder vorgegeben sind, daß sie der Beziehung PN > PP > PR genügen, und
    ein Druck des vom Brennstoffbehälter (19) zugeführten oder geförderten Brennstoffs höher als PP und niedriger als PN ist und ein Druck des von der Hochdruckpumpe (3) geförderten Öls höher als PN ist.
  4. Verfahren zum Zuführen von Brennstoff zu einem mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor, in welchem ein feine Teilchen eines festen Brennstoffs enthaltendes Brennöl zu verbrennen ist, umfassend die folgenden Schritte:
    Fördern des feine Teilchen eines festen Brennstoffs enthaltenden Brennöls in einer vorbestimmten Menge von einem Brennstoffbehälter (19) zu einer Ölreservoirsektion (12) in einem Einspritzventil (9) mittels einer Pumpe (18), (und)
    Unterdrucksetzen von aus einem Ölbehälter (1) zugeführtem oder gefördertem Hochdrucköl mittels einer Hochdruckpumpe (3), gekennzeichnet durch
    Fördern des unter Druck gesetzten Öls durch ein Druckwellenausbreitungsrohr (8) zur Ölreservoirsektion (12), um damit den in der Ölreservoirsektion (12) befindlichen Brennstoff unter Druck zu setzen,
    Einspritzen des so unter Druck gesetzten, in der Ölreservoirsektion (12) enthaltenen Brennstoffs über eine Düsenbohrung (10) des Einspritzventils (9), (und)
    Rückfördern des unter Druck gesetzten Öls über ein Rückförderrohr (22) zum Ölbehälter (1), sobald die vorbestimmte Menge an in der Ölreservoirsektion (12) enthaltenem Brennstoff über die Düsenbohrung (10) eingespritzt (worden) ist, um damit das unter Druck gesetzte Öl nicht über die Düsenbohrung (10) einzuspritzen.
  5. Verfahren zum Zuführen von Brennstoff zu einem mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor nach Anspruch 4, ferner umfassend die folgenden Schritte:
       Bestimmen einer Liefermenge des unter Druck gesetzten Öls von der Hochdruckpumpe (3) und Regeln der vom Brennstoffbehälter (19) zur Ölreservoirsektion (12) geförderten vorbestimmten Menge an feine Teilchen festen Brennstoffs enthaltendem Brennstoff nach Maßgabe dieser Bestimmung.
  6. Verfahren zum Zuführen von Brennstoff zu einem mit Feinteilchen vermischten Brennstoff verbrennenden Dieselmotor nach Anspruch 4 oder 5, wobei der aus dem Brennstoffbehälter (19) mittels der Pumpe (18) zu einer Ölreservoirsektion (12) geförderte Brennstoff mit einem Druck gefördert wird, der höher ist als ein Ventilöffnungsdruck (PP) eines Rückschlagventils (13), das im Einspritzventil (9) in der Brennstoffstrecke stromauf der Ölreservoirsektion (12) vorgesehen ist, und der niedriger ist als ein Ventilöffnungsdruck (PN) eines Nadelventils (11), das in einer Strecke zwischen der Ölreservoirsektion (12) und einer Düsenbohrung (10) vorgesehen ist, und
       das mittels der Hochdruckpumpe (3) zur Ölreservoirsektion (12) geförderte Hochdrucköl unter einen Druck gesetzt wird, der höher ist als der Ventilöffnungsdruck (PN) des Nadelventils (11).
EP92111211A 1991-07-23 1992-07-02 System und Verfahren zum Zuführen von Brennstoff zu einem eine Mischung aus Kleinpartikeln und Brennstoff verbrennenden Dieselmotor Expired - Lifetime EP0528150B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3205630A JP2862104B2 (ja) 1991-07-23 1991-07-23 微粒子混合燃料焚きディーゼルエンジンの燃料供給方法
JP205630/91 1991-07-23

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Publication Number Publication Date
EP0528150A1 EP0528150A1 (de) 1993-02-24
EP0528150B1 true EP0528150B1 (de) 1996-06-05

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EP92111211A Expired - Lifetime EP0528150B1 (de) 1991-07-23 1992-07-02 System und Verfahren zum Zuführen von Brennstoff zu einem eine Mischung aus Kleinpartikeln und Brennstoff verbrennenden Dieselmotor

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EP (1) EP0528150B1 (de)
JP (1) JP2862104B2 (de)
KR (1) KR970002090B1 (de)
DE (1) DE69211250T2 (de)
DK (1) DK0528150T3 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337048C2 (de) * 1993-10-29 1996-01-11 Daimler Benz Ag Kraftstoffeinspritzanlage für eine Brennkraftmaschine
EP0747923A1 (de) * 1995-06-09 1996-12-11 VIDEOCOLOR S.p.A. Schliessvorrichtung für ein Ablenkjoch
DE10330511A1 (de) * 2003-07-05 2005-02-10 Man B & W Diesel Ag Verbrennungskraftmaschine
WO2013142921A1 (en) * 2012-03-29 2013-10-03 Commonwealth Scientific And Industrial Research Organisation Injection of heavy and particulate laden fuels
CN105715436B (zh) * 2016-01-14 2016-11-23 吉林大学 一种车用发动机液体燃料定量混合装置
CN105840381B (zh) * 2016-03-18 2018-08-10 江苏大学 天然气/柴油双燃料喷射混合特性研究装置及其控制方法
CN112805083B (zh) * 2018-08-02 2024-01-05 南洋理工大学 通过两相界面组装的janus颗粒制备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862837A (en) * 1988-04-21 1989-09-05 Defense Research Technologies, Inc. Fuel injection of coal slurry using vortex nozzles and valves

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924128A1 (de) * 1979-06-15 1980-12-18 Motoren Werke Mannheim Ag Einrichtung zur einspritzung von zuendkraftstoff einerseits und zuendunwilligem hauptkraftstoff andererseits fuer dieselmotoren
GB2126650B (en) * 1982-08-31 1988-02-10 George Stan Baranescu I c engine injection system providing a stratified charge of two fuels
JPS61171874A (ja) * 1985-01-28 1986-08-02 Nippon Denso Co Ltd ２種燃料噴射装置
JP2538908B2 (ja) * 1987-03-15 1996-10-02 三菱重工業株式会社 ２種燃料エンジンの噴射システム
DE3931456A1 (de) * 1989-09-21 1991-04-04 Bosch Gmbh Robert Einspritzeinrichtung fuer dieselmotoren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862837A (en) * 1988-04-21 1989-09-05 Defense Research Technologies, Inc. Fuel injection of coal slurry using vortex nozzles and valves

Also Published As

Publication number Publication date
KR930002656A (ko) 1993-02-23
JP2862104B2 (ja) 1999-02-24
KR970002090B1 (ko) 1997-02-22
DE69211250D1 (de) 1996-07-11
EP0528150A1 (de) 1993-02-24
JPH0526126A (ja) 1993-02-02
DK0528150T3 (da) 1996-10-21
DE69211250T2 (de) 1996-12-12

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