EP0982492B1 - Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif - Google Patents

Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif Download PDF

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Publication number
EP0982492B1
EP0982492B1 EP99810617A EP99810617A EP0982492B1 EP 0982492 B1 EP0982492 B1 EP 0982492B1 EP 99810617 A EP99810617 A EP 99810617A EP 99810617 A EP99810617 A EP 99810617A EP 0982492 B1 EP0982492 B1 EP 0982492B1
Authority
EP
European Patent Office
Prior art keywords
fuel
piston
injection
control
pressure
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
EP99810617A
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German (de)
English (en)
Other versions
EP0982492A2 (fr
EP0982492A3 (fr
Inventor
Robert Hofer
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.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz 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.)
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Publication date
Application filed by Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP99810617A priority Critical patent/EP0982492B1/fr
Publication of EP0982492A2 publication Critical patent/EP0982492A2/fr
Publication of EP0982492A3 publication Critical patent/EP0982492A3/fr
Application granted granted Critical
Publication of EP0982492B1 publication Critical patent/EP0982492B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid pressure

Definitions

  • the invention relates to a device for injecting fuel for a reciprocating internal combustion engine according to the preamble of claim 1 and a reciprocating internal combustion engine with such a device.
  • a metering piston is fed by a fuel pump with fuel under injection pressure up to 2 000 bar.
  • a control piston is arranged downstream of the metering piston and has guide elements for the fuel.
  • the control piston is moved by a hydraulic system between two end positions, which is controlled electrically.
  • the metering piston is driven by fuel from the fuel pump.
  • the fuel is supplied via the guide elements from a fuel pump to the metering chamber or from the metering chamber of the injection nozzle of a cylinder of a reciprocating internal combustion engine.
  • JP 60 162 021 describes an injection device according to the preamble of claim 1.
  • the invention has for its object to provide a device for injecting fuel for a reciprocating internal combustion engine, wherein the fuel is supplied to the metering piston under a lower pressure than the injection pressure.
  • the use of the pressure intensifier simplifies the supply of fuel and consequently eliminates the accumulator for the fuel under high pressure up to 2,000 bar and the high-pressure pumps.
  • control valves the control of the injectors in register and stutter injection and / or switching off one or more injectors of an engine cylinder is made possible. If all injectors of an engine cylinder fail, the engine can be run with the remaining cylinders at partial load.
  • the injection volume can be kept constant. In case of failure of the distance measurement, the injection is timed. If an ignition pressure measuring device is used, the ignition pressure can be regulated to the permissible value with the injection device, so that the most favorable fuel consumption is always achieved.
  • the injection device includes a pressure booster 1 and a spool 2, which are displaceable between two end positions and a control valve 3 and a hydraulic-electrical device 4.
  • the pressure booster 1 is designed as a stepped piston having two pistons 7, 8 with different diameters.
  • the pistons 7, 8 are each arranged displaceably in a chamber 9, 10, wherein the chamber 9 for the larger piston 7 via a channel 11 communicates with the spool 2 and wherein the chamber 10 for the smaller piston 8 via a channel 12th communicates with the control valve 3 and via a channel 13 with an arrangement 14 for supplying fuel, for example diesel fuel or heavy oil.
  • an elastic means 15 is arranged, which holds the pressure booster 1 in an end position.
  • the connecting channel 11 is closed to the control slide 2 and the connecting channels 12 and 13 open to the control valve 3 and to the arrangement 14 for supplying fuel.
  • the spool 2 is arranged in a cylindrical chamber 21, the supply channel 22, the consumer channel 11, which leads to the pressure booster 1 and a discharge channel 24 and at the end faces a channel 25 for pressure medium and a channel 26 for the leakage.
  • a spring 27 is arranged, which holds the spool 2 in an end position, the channel 25 is completed.
  • the spool 2 is cylindrical and has two control edges 32, 32 to control the flow of a medium.
  • the control valve 3 has an open / close function and has a valve body 41 with a seat, a feed channel 42 for fuel, a return channel 43 and a consumer channel 44, a valve spool 45 with a poppet 46 and a known actuator 47 for the valve spool.
  • the hydraulic-electric device 4 comprises a plurality of hydraulic pumps 51 (only one shown), an accumulator 52, pilot valves 53, 54 for the spool 2 and the control valve 3, an angle sensor 55, which indicates both the angle of rotation and the crankshaft position, means 56 for Sensing the position of the pressure booster and an electronic control unit 57 which is connected to the pilot valves 53, 54, the angle sensor 55 and the device 56 signal transmitting.
  • the device 56 is advantageously designed as an inductive measuring system.
  • an adaptive component injection volume control may be provided.
  • a speed dependent adaptive start of injection control is provided. The monitoring and control of the actual values of the position and speed is carried out by comparison with the setpoint values of the position and the speed of the metering piston.
  • conduit 61 branch off the accumulator 52, which are respectively provided for a cylinder of a reciprocating internal combustion engine, wherein the cylinder may have one or more injection nozzles.
  • the conduit 61 is connected to the supply passage 22 of the spool 2 and the pilot valves 53, 54.
  • a conduit 62 is provided for each outlet valve (not shown).
  • the pressure booster 1 communicates with the control valve 3.
  • a plurality of control valves 3 may be connected to the pressure booster 1.
  • the pressure booster fulfills two tasks, one Dosing and a pressure increase of the fuel for each injection process.
  • the metering of the fuel takes place by means of the device 56, which continuously determines the path of the displacement and applies it as signals to the control electronics 57. From the cross-sectional area of the smaller piston 8 of the pressure booster 1 and from the distance traveled, the displaced volume is determined, thereby realizing a volumetric injection.
  • the Dosierkolbenwegwalller indirectly also broken injector heads can be determined, because in such a case, the Dosierkolben beaut, the Dosierkolben 1987 is greater than usual during the injection process.
  • This signal will cause the control electronics to suppress fuel injection into a defective injector cylinder and, if necessary, reduce the overall engine load and / or indicate the fault with a display device.
  • the hydraulic pumps promote control oil to a pressure of about 100 to 300 bar in the accumulator 52. The energy contained in this oil is used to actuate the device in question here.
  • the figure shows the device in the pre-injection condition, in which the assembly 14 has supplied fuel to the pressure booster 1, which is under a pressure of about 10 bar and can use the injection, which proceeds as follows.
  • the pilot valve 53 is controlled for the spool 2 from the control electronics 57 and the spool moved relatively slowly in the working position.
  • the control oil flows into the larger chamber 9 of the pressure booster 1 and displaces the stepped piston, so that the fuel present in the smaller chamber 10 is displaced.
  • the small chamber 10 is closed on the one hand by a check valve in the assembly 14 and on the other hand by the closed control valve 3, a pressure is built up which corresponds to the area ratio of the stepped piston.
  • the valve spool 45 is actuated and the control valve 3 is opened, so that the fuel flows to the injection nozzle. To prevent the injection at low pressure, the injection process is completed quickly.
  • the spool 2 After completion of the injection process, the spool 2 is returned to the rest position, so that the control oil from the larger chamber 9 of the booster 1 can flow off via the channels 11 and 24. This provision is supported by the means 15 and the newly flowing into the smaller chamber 10 of the booster 1 fuel.
  • the apparatus includes a metering piston, which is formed as a pressure booster (1) with a stepped piston to set a fuel quantity and bring to injection pressure and at least one control valve (3) to supply one or more injectors (5) with fuel.
  • the pressure booster (1) and the control valve are actuated by an electrically controlled, hydraulic system, which is acted upon by a pump with working oil at a pressure substantially lower than the injection pressure. By the control valves (3) an individual injection is possible.

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  • 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)

Claims (8)

  1. Dispositif pour l'injection de combustible comprenant un dispositif (14) pour l'arrivée du combustible, un piston de dosage (1) pour le dosage de la quantité de combustible à injecter, un moyen de commande (2) pour la commande du piston de dosage (1), avec un organe de commande (3) pour l'arrivée de la quantité de combustible à une buse de combustible (5), qui est disposé en aval du piston de dosage (1) dans le sens d'écoulement et un dispositif (4) hydroélectrique pour la commande de l'injection, le piston de dosage étant conçu comme amplificateur de pression (1), afin d'augmenter le combustible à la pression d'injection, et le dispositif (14) pour l'arrivée de combustible à une chambre de travail (10) du piston de dosage (1), sous pression plus faible que la pression d'injection et l'organe de commande (3) qui est conçu comme vanne de commande (3), le moyen de commande (2) pour le piston de dosage (1) et la vanne de commande (3) pour la commande de la quantité de combustible pour la buse de combustible (5) étant en liaison avec le dispositif (4) hydroélectrique, afin de commander l'opération d'injection, caractérisé par
    un dispositif de balayage (56) pour la surveillance de la position actuelle du piston (7, 8) de l'amplificateur de pression (1) et pour la comparaison de la position réelle du piston (7, 8) de l'amplificateur de pression (1) avec une position théorique afin de déterminer la quantité injectée et/ou pour la surveillance de la vitesse réelle du piston (7, 8) de l'amplificateur de pression (1) et pour la comparaison de la vitesse réelle du piston de l'amplificateur de pression (1) avec une vitesse théorique, afin de déterminer le début de l'injection.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'amplificateur de pression est conçu comme piston à étages (1), qui présente deux pistons (7, 8) avec un diamètre différent et en ce que le dispositif (14) pour l'arrivée du combustible débouche dans la chambre de travail (10) pour le piston (8) plus petit.
  3. Dispositif selon la revendication 2, caractérisé en ce que le moyen de commande est conçu comme coulisseau de commande (2), qui est en liaison avec une chambre de travail (9) pour le piston (7) plus grand.
  4. Dispositif selon la revendication 3, caractérisé par un dispositif avec un ou plusieurs accumulateurs (52) pour l'arrivée d'huile de travail et par des vannes de précommande (53, 54) pour chaque coulisseau de commande (2) et pour chaque vanne de commande (3).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé par un dispositif de réglage (57) adaptatif, qui est relié au dispositif de balayage (56) par transmission de signal, afin de régler, le début d'injection et/ou la quantité injectée en fonction de la comparaison entre les valeurs réelles et les valeurs de consignes correspondantes.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que plusieurs vannes de commande (3) sont attribuées à l'amplificateur de pression (1), afin d'alimenter plusieurs cylindres d'un moteur à combustion interne ou plusieurs buses d'injection (5) d'un cylindre avec du combustible.
  7. Dispositif selon l'une quelconque des revendications 1 à 6 pour l'injection de gazole et d'huile lourde dans le cylindre d'un moteur à combustion interne à piston alternatif.
  8. Moteur à combustion interne à piston alternatif avec un dispositif selon l'une quelconque des revendications 1 à 7, lequel moteur est un moteur à combustion interne à deux temps ou à quatre temps.
EP99810617A 1998-08-28 1999-07-12 Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif Expired - Lifetime EP0982492B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99810617A EP0982492B1 (fr) 1998-08-28 1999-07-12 Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98810854 1998-08-28
EP98810854 1998-08-28
EP99810617A EP0982492B1 (fr) 1998-08-28 1999-07-12 Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif

Publications (3)

Publication Number Publication Date
EP0982492A2 EP0982492A2 (fr) 2000-03-01
EP0982492A3 EP0982492A3 (fr) 2002-11-20
EP0982492B1 true EP0982492B1 (fr) 2008-03-26

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ID=8236288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810617A Expired - Lifetime EP0982492B1 (fr) 1998-08-28 1999-07-12 Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif

Country Status (7)

Country Link
EP (1) EP0982492B1 (fr)
JP (1) JP4574762B2 (fr)
KR (1) KR100743208B1 (fr)
CN (1) CN1114758C (fr)
DE (1) DE59914703D1 (fr)
DK (1) DK0982492T3 (fr)
PL (1) PL197444B1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4574762B2 (ja) * 1998-08-28 2010-11-04 ヴェルトジィレ シュヴァイツ アクチェンゲゼルシャフト 往復ピストンエンジンの燃料噴射装置
DE19939422A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine
KR20020004006A (ko) * 2000-06-29 2002-01-16 박상록 축압식 연료분사시스템의 압력 제어장치
DE10101358A1 (de) * 2001-01-13 2002-07-25 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
US7588012B2 (en) 2005-11-09 2009-09-15 Caterpillar Inc. Fuel system having variable injection pressure
US7543568B1 (en) * 2008-02-14 2009-06-09 Gm Global Technology Operations, Inc. Fuel pressure amplifier for improved cranking performance
CN102112708B (zh) * 2008-07-14 2014-06-18 曼柴油机欧洲股份公司曼柴油机德国分公司 大型两冲程柴油发动机的凸轮驱动排气阀致动***
EP2410168A1 (fr) * 2010-07-23 2012-01-25 Wärtsilä Schweiz AG Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide
JP2012026396A (ja) * 2010-07-27 2012-02-09 Akasaka Tekkosho:Kk 燃料噴射ポンプ
CN104879258A (zh) * 2015-03-27 2015-09-02 中国北方发动机研究所(天津) 一种液压放大式超高压燃油供给装置
DK179161B1 (en) * 2016-05-26 2017-12-18 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland A large two-stroke compression-ignited internal combustion engine with fuel injection system for low flashpoint fuel and a fuel valve therefore
CN107476915B (zh) * 2017-08-22 2019-11-01 哈尔滨工程大学 一种带缓冲装置的双作用式高压燃油供给装置

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Publication number Priority date Publication date Assignee Title
JPS60162021A (ja) * 1984-01-31 1985-08-23 Kawasaki Heavy Ind Ltd 内燃機関の燃料噴射制御装置

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GB1475282A (en) * 1973-05-12 1977-06-01 Cav Ltd Hydraulic system
GB1522954A (en) * 1974-11-01 1978-08-31 Cav Ltd Fuel systems for internal combustion engines
DE3001155A1 (de) * 1980-01-15 1981-07-16 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage fuer selbstzuendende brennkraftmaschine
JPS5874867A (ja) * 1981-10-30 1983-05-06 Nippon Denso Co Ltd 内燃機関の燃料噴射制御方法
JPS58214661A (ja) * 1982-06-08 1983-12-13 Nippon Soken Inc 流量計測装置および内燃機関の燃料噴射制御システム
JPS59152173U (ja) * 1983-03-31 1984-10-12 いすゞ自動車株式会社 増圧プランジヤ式燃料噴射装置
JPS6023248U (ja) * 1983-07-25 1985-02-18 いすゞ自動車株式会社 燃料噴射装置用サ−ボプランジヤの移動量検出装置
JPS60256548A (ja) * 1984-05-31 1985-12-18 Isuzu Motors Ltd 増圧プランジヤ式燃料噴射装置
JPS61210264A (ja) * 1985-03-15 1986-09-18 Sumio Ishikawa 増圧式燃料噴射装置
JPH062632A (ja) * 1992-06-16 1994-01-11 Shinnenshiyou Syst Kenkyusho:Kk 電気油圧式燃料噴射装置の始動増量方法
JP2819963B2 (ja) * 1992-09-21 1998-11-05 日産自動車株式会社 蓄圧式インジェクタ
DK0690222T3 (da) * 1994-06-27 1999-12-06 Wortsilo Nsd Schweiz Ag Indsprøjtningsindretning til indsprøjtning af brændstof ved en stempelforbrændingsmotor
JP2885076B2 (ja) * 1994-07-08 1999-04-19 三菱自動車工業株式会社 蓄圧式燃料噴射装置
JP4574762B2 (ja) * 1998-08-28 2010-11-04 ヴェルトジィレ シュヴァイツ アクチェンゲゼルシャフト 往復ピストンエンジンの燃料噴射装置

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS60162021A (ja) * 1984-01-31 1985-08-23 Kawasaki Heavy Ind Ltd 内燃機関の燃料噴射制御装置

Also Published As

Publication number Publication date
DE59914703D1 (de) 2008-05-08
JP4574762B2 (ja) 2010-11-04
KR100743208B1 (ko) 2007-07-26
PL197444B1 (pl) 2008-03-31
DK0982492T3 (da) 2008-04-21
CN1246581A (zh) 2000-03-08
JP2000073912A (ja) 2000-03-07
EP0982492A2 (fr) 2000-03-01
CN1114758C (zh) 2003-07-16
PL334586A1 (en) 2000-03-13
EP0982492A3 (fr) 2002-11-20
KR20000017580A (ko) 2000-03-25

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