EP0704619B1 - Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre - Google Patents

Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre Download PDF

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Publication number
EP0704619B1
EP0704619B1 EP95111427A EP95111427A EP0704619B1 EP 0704619 B1 EP0704619 B1 EP 0704619B1 EP 95111427 A EP95111427 A EP 95111427A EP 95111427 A EP95111427 A EP 95111427A EP 0704619 B1 EP0704619 B1 EP 0704619B1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
fuel
high pressure
line
fuel injection
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
EP95111427A
Other languages
German (de)
English (en)
Other versions
EP0704619A1 (fr
Inventor
Emil Dipl.-Ing. Bäuerle
Magnus Dipl.-Ing. Korte
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz 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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0704619A1 publication Critical patent/EP0704619A1/fr
Application granted granted Critical
Publication of EP0704619B1 publication Critical patent/EP0704619B1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • 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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors

Definitions

  • the invention relates to a fuel injection system for a multi-cylinder internal combustion engine with the features specified in the preamble of claim 1.
  • Such a fuel injection system for a multi-cylinder internal combustion engine is known from EP-A-0 501 459, in which a high-pressure pump delivers fuel into a supply line (common rail) which acts as a high-pressure fuel reservoir.
  • the supply line is designed as a high-strength, thick-walled tube and connected to solenoid valve-controlled nozzles via injection lines.
  • the invention has for its object to improve the generic fuel injection system between the high pressure pump and the solenoid-controlled nozzles in terms of weight, space and costs.
  • the high-pressure fuel accumulator which is located in the hollow rocker arm axis, has a storage volume that corresponds approximately to 300 times the maximum fuel injection quantity of a cylinder. This large volume means that pressure peaks and pressure fluctuations that occur can be kept within permissible limits.
  • a beneficial development of the invention results from the fact that, in addition to the supply line as a high-pressure fuel accumulator, at least one further line is arranged in the rocker arm axis and is used to supply the rocker arm with lubricating oil. If necessary, a control line for the camshaft adjustment can be provided in addition to the fuel-carrying line and the lubricating-oil-carrying line.
  • a fuel injection system 1 for a diesel internal combustion engine essentially consists of at least one high-pressure pump 2 which delivers the fuel, a high-pressure fuel reservoir as a common supply line 3 and solenoid valve-controlled nozzles 4, the magnets 5 of which can be controlled by an electronic control unit 6 which operates as a function of operating parameters of the internal combustion engine.
  • a fuel feed line 7 leading away from the high pressure pump 2 according to FIG. 1 is connected to a hollow rocker arm axis 8.
  • the connection of the fuel supply line 7 is located at a free end 9 of the rocker arm axis 8, on which rocker arms 10 designed as valve actuation means and driven by cams 11 of a camshaft 12 are rotatably mounted for actuating intake and exhaust valves 13, 14.
  • connections 15 for injection lines 16 are provided between the intake and exhaust valves 13, 14 of the respective cylinder (not shown), which lead to the corresponding nozzles 4. With 17 fuel return lines are designated.
  • the rocker arm axis 8 has a fuel-carrying bore which forms the supply line 3, the storage volume of the supply line corresponding approximately to 300 times a maximum fuel injection quantity.
  • This ratio also applies to the differently designed exemplary embodiments 3, 4 and 5, which in addition to the supply line 3 also contain an oil-carrying line as a high-pressure fuel reservoir.
  • the volume of these lines is considerably smaller, since they have no storage function, but serve to supply lubricating oil to the valve train parts.
  • the fuel storage pressure provided for common rail systems is around 1,500 bar.
  • the additional hole in the rocker arm axis 8 is designated as an oil-carrying line for the lubricating oil supply with 18, which is significantly smaller in diameter than the fuel-carrying supply line 3. If necessary, a further hole (shown in dash-dotted lines) can be introduced, the oil-carrying control line 19 for with rocker arms 10 cooperating coupling links.
  • the rocker arm axis 8 consists of an outer tube 8 'into which an insert body 20 is pressed.
  • this insert body 20 contains the fuel-carrying supply line 3, the lubricating-oil-carrying line 18 and optionally the oil-carrying control line 19.
  • the hollow rocker arm axis 8 is provided with a longitudinal web 21 which is eccentrically located in the cavity as a partition for forming the fuel-carrying supply line 3 and the lubricating-oil-carrying line 18.
  • a further chambering for the control line 19 can optionally be provided by inserting an intermediate wall in the oil-carrying line 18.

Landscapes

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

Claims (6)

  1. Dispositif d'injection de carburant pour un moteur à combustion interne multicylindrique, comprenant des moyens d'actionnement de soupapes montés rotatifs sur un axe de culbuteurs pour actionner des soupapes d'admission et d'échappement, une pompe à haute pression destinée à refouler le carburant dans une conduite d'alimentation commune, prévue pour des injecteurs commandés par électro-aimant et faisant office d'accumulateur de haute pression de carburant, et sur laquelle est prévu, pour chaque cylindre, un raccord pour une conduite d'injection menant à un injecteur,
    caractérisé
    en ce que l'accumulateur de haute pression de carburant (3) est formé par un axe de culbuteurs (8) creux dont le volume accumulateur de carburant représente un multiple de la quantité maximale de carburant qu'il s'agit d'injecter à chaque fois.
  2. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé
    en ce que, dans l'axe de culbuteurs creux (8), est prévue, outre un accumulateur de haute pression de carburant (3), au moins une conduite (18 ; 19) conduisant de l'huile, distincte de cet accumulateur.
  3. Dispositif d'injection de carburant selon la revendication 1 ou 2,
    caractérisé
    en ce que l'accumulateur de haute pression de carburant (3) et au moins une conduite (18 ; 19) conduisant de l'huile sont formés par des perçages longitudinaux pratiqués dans l'axe de culbuteurs (8).
  4. Dispositif d'injection de carburant selon la revendication 1 ou 2,
    caractérisé
    en ce que l'axe de culbuteurs creux (8) présente un élément inséré (20) muni de perçages longitudinaux, dans lequel l'un des perçages longitudinaux forme l'accumulateur de haute pression de carburant (3) et au moins un autre perçage longitudinal forme la conduite (18 ; 19) conduisant de l'huile.
  5. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé
    en ce que, sur l'axe de culbuteurs creux (8), est prévu dans l'intervalle entre une soupape d'admission et une soupape d'échappement (13, 14), un raccord (15) pour une conduite d'injection (16) menant à un injecteur (4).
  6. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé
    en ce qu'à une extrémité de l'axe de culbuteur creux (8), est raccordée une conduite d'amenée du carburant (7) qui part de la pompe à haute pression (2).
EP95111427A 1994-09-29 1995-07-20 Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre Expired - Lifetime EP0704619B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434783 1994-09-29
DE4434783A DE4434783C2 (de) 1994-09-29 1994-09-29 Kraftstoffeinspritzanlage für eine mehrzylindrige Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0704619A1 EP0704619A1 (fr) 1996-04-03
EP0704619B1 true EP0704619B1 (fr) 1997-01-02

Family

ID=6529493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111427A Expired - Lifetime EP0704619B1 (fr) 1994-09-29 1995-07-20 Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre

Country Status (3)

Country Link
US (1) US5553592A (fr)
EP (1) EP0704619B1 (fr)
DE (2) DE4434783C2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5829414A (en) * 1994-09-26 1998-11-03 Honda Giken Kogyo Kabushiki Kaisha Fuel supply system for multi-cylinder engine
SE506131C2 (sv) * 1996-10-07 1997-11-10 Scania Cv Ab Vipparm för drivning av bränsleinsprutare
DE19750298A1 (de) * 1997-11-13 1999-05-20 Man Nutzfahrzeuge Ag Brennkraftmaschine mit Hochdruckeinspritzsystem
GB9914790D0 (en) * 1999-06-25 1999-08-25 Lucas Ind Plc Fuel supply system
DE19945436C1 (de) * 1999-09-22 2001-01-18 Siemens Ag Einspritzanlage
DE19945316A1 (de) * 1999-09-22 2001-04-05 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
US6966301B2 (en) 2002-05-03 2005-11-22 Delphi Technologies, Inc. Accumulator fuel system
WO2005054656A1 (fr) * 2003-11-04 2005-06-16 Delphi Technologies, Inc. Systeme d'alimentation en carburant, a accumulation
DE102005026600B4 (de) * 2005-06-09 2013-08-22 Man Diesel & Turbo Se Brennkraftmaschine
DE102018126757A1 (de) * 2018-10-26 2020-04-30 Man Truck & Bus Se Ventiltrieb für mindestens ein Hubventil einer Brennkraftmaschine

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
US3125078A (en) * 1964-03-17 Fuel supply system
US2104729A (en) * 1928-12-29 1938-01-11 Auto Research Corp Automatic centralized lubricating installation
CH225034A (de) * 1941-06-23 1942-12-31 Sulzer Ag Umsteuereinrichtung an Brennkraftmaschinen.
US2955582A (en) * 1957-06-21 1960-10-11 Gen Motors Corp Timed fuel injection system
GB1469480A (en) * 1974-08-07 1977-04-06 Ciba Geigy Ag Photographic emulsion
JPS5289706A (en) * 1976-01-21 1977-07-27 Toyota Motor Corp Lean mixture combustion type internal combustion engine
JPS6017927B2 (ja) * 1977-03-22 1985-05-08 トヨタ自動車株式会社 バルブ・ロツカ・ア−ムの給油方法
SE458048B (sv) * 1983-06-20 1989-02-20 Yanmar Diesel Engine Co Vipparmskammaranordning i en dieselmotor
JPS62159762A (ja) * 1986-01-08 1987-07-15 Honda Motor Co Ltd デイ−ゼルエンジン
CA1308977C (fr) * 1986-08-27 1992-10-20 Tsuneo Konno Mecanisme d'actionnement des soupapes de moteur a combustion interne
JP3033214B2 (ja) * 1991-02-27 2000-04-17 株式会社デンソー 複数の燃料圧送手段による蓄圧式燃料供給方法及び装置と、複数の流体圧送手段を有する機器における異常判断装置
SE468719B (sv) * 1991-07-02 1993-03-08 Saab Scania Ab Arrangemang foer braensleledning vid foerbraenningsmotor
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DE4404378C2 (de) * 1993-02-20 2001-03-08 Volkswagen Ag Ventilanordnung mit mehreren parallelachsigen Hubventilen und einer diesen gemeinsamen Betätigungsvorrictung
US5297523A (en) * 1993-02-26 1994-03-29 Caterpillar Inc. Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system
US5325834A (en) * 1993-08-03 1994-07-05 Caterpillar Inc. Method of and conversion kit for converting an engine to hydraulically-actuated fuel injection system
DE4331504C1 (de) * 1993-09-16 1995-02-16 Daimler Benz Ag Verfahren zum Herstellen einer für Brennkraftmaschinen vorgesehenen hohlausgeführten Kipphebelachse

Also Published As

Publication number Publication date
US5553592A (en) 1996-09-10
DE59500080D1 (de) 1997-02-13
EP0704619A1 (fr) 1996-04-03
DE4434783A1 (de) 1996-04-11
DE4434783C2 (de) 1998-04-09

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