EP1627146B1 - Systeme d'injection pour moteur a combustion interne, notamment moteur diesel - Google Patents

Systeme d'injection pour moteur a combustion interne, notamment moteur diesel Download PDF

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Publication number
EP1627146B1
EP1627146B1 EP04787218A EP04787218A EP1627146B1 EP 1627146 B1 EP1627146 B1 EP 1627146B1 EP 04787218 A EP04787218 A EP 04787218A EP 04787218 A EP04787218 A EP 04787218A EP 1627146 B1 EP1627146 B1 EP 1627146B1
Authority
EP
European Patent Office
Prior art keywords
volume
pump
injector
pressure pump
integrated
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
EP04787218A
Other languages
German (de)
English (en)
Other versions
EP1627146A1 (fr
Inventor
Thomas Grossner
Christoph Klesse
Hans Riepl
Christian Taudt
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1627146A1 publication Critical patent/EP1627146A1/fr
Application granted granted Critical
Publication of EP1627146B1 publication Critical patent/EP1627146B1/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
    • 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
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to an injection system for an internal combustion engine, in particular for a diesel engine, with a high pressure pump for fuel supply in at least one injector via at least one disposed between the high pressure pump and the injector fuel line and with a high pressure pump upstream prefeed pump for delivering fuel from a fuel tank in the high pressure pump.
  • the present invention is accordingly an object of the invention to provide a hydraulic system, which despite a built-in high-pressure pump storage volume comparable Hydraulic stability causes simpler design of the entire system.
  • a further embodiment of the invention can be 0.006 to 0.02 1 / cm 2 in a high-pressure pump with a diaphragm at the high pressure output, the ratio of the aperture diameter to the integrated pump volume.
  • This panel is installed in any existing high pressure outlet.
  • a further optimization of the entire hydraulic system is provided by an additional parameter, namely the ratio of the length of the fuel line between the high pressure pump and the respective injector and the integrated pump volume, which can be 3 to 9 1 / cm 2 .
  • the injection system schematically illustrated in FIG. 1 for an internal combustion engine, in particular for a diesel engine, has a high-pressure pump 1 with integrated storage strip (storage rail).
  • This high-pressure pump 1 is preceded by a pre-feed pump for conveying fuel from a fuel tank not shown in the high-pressure pump 1 upstream.
  • This high-pressure pump 1 is connected via fuel lines 5.1, 5.2, 5.3, 5.4 each with an injector 4.1, 4.2, 4.3, 4.4.
  • the storage volume of these injectors is increased according to the invention, wherein a second high-pressure bore may be present to increase the volume.
  • the inner diameter of the fuel lines 5.1, 5.2, 5.3, 5.4 between the outlet of the high-pressure pump 1 and the respective injector 4.1, 4.2, 4.3, 4.4 is in the range of 0.025 to 0.65 1 / cm 2 in relation to the integrated pump volume.
  • the ratio of the length of the lines 5.1, 5.2, 5.3, 5.4 between the high-pressure pump 1 and the relevant injector is 3.0 to 9.0 1 / cm 2 .
  • Fig. 2 shows in a coordinate system, the injection quantity (axis y) to the separation angle (axis x).
  • the region I defines the pilot injection, with the main injection (region II) taking place after a separation angle ⁇ .
  • the angle ⁇ is varied according to experience in the range between 5 ° and 40 °.
  • Figures 3a and 3b show a diagram of the optimized "railless" system (reference A) compared to a conventional system (reference N). Shown are the injection quantities (axis y) of the main injection (FIG. 3a) and the pilot injection (FIG. 3b) as a function of the separation angle (axis x) from pre-to main injection.
  • Fig. 3 shows a typical full load situation. As can be seen from FIG. 3b; In the pre-injection with respect to the system A according to the invention and the conventional system N, virtually identical values of the injection quantities are present over the entire separation angle.
  • Fig. 3a that is, the main injection
  • the conventional system has large injection quantity fluctuations over the entire separation angle range, that is, there are large irregularities with respect to the injection quantity.
  • the injection quantity fluctuates between 45 and more than 47 mg / stk at the operating point shown here.
  • a strong equalization of the injection quantity over the entire separation angle can be recognized by the railless system according to the invention.
  • FIGS. 4a and 4b show a situation similar to that of FIG. 3a and FIG. 3b at partial load.
  • FIG. 4b namely the pre-injection, that there is a high degree of equalization of the injection quantity over the entire separation angle in the railless system according to the invention, whereas in a conventional system there are still strong peak values.
  • Fig. 4a shows the system at part load and main injection.
  • the injection quantity values during Conventional system have significant volume fluctuations (up to 2 mg / stk with a target amount of 10 mg / stk) (curve N)
  • curve N the injection quantity values during Conventional system
  • curve A a significant homogenization of the injection quantities over the conventional system over the entire separation angle range given is.

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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)

Claims (5)

  1. Système d'injection pour un moteur à combustion interne, en particulier pour un moteur diesel,
    avec une pompe haute pression (1) comportant un volume de pompe intégré pour l'alimentation en carburant dans au moins un injecteur (4.1, 4.2, 4.3, 4.4), au moyen d'au moins une conduite de carburant (5.1, 5.2, 5.3, 5.4) disposée entre la pompe haute pression et l'injecteur, et comportant une pompe de mise en circulation initiale, disposée en amont de la pompe haute pression (1), pour alimenter en carburant la pompe haute pression (1) à partir d'un réservoir de carburant,
    caractérisé en ce que
    le diamètre intérieur de la conduite de carburant (5.1, 5.2, 5.3, 5.4) entre la sortie de la pompe haute pression (1) et l'injecteur (4.1, 4.2, 4.3, 4.4) est situé dans la zone de 0,025 à 0,065 1/cm2' par rapport au volume de pompe intégré de la pompe haute pression,
    et en ce que le volume de l'injecteur (4.1, 4.2, 4.3, 4.4) correspondant est de 0.75 à 0,25 par rapport au volume de pompe intégré.
  2. Système d'injection suivant la revendication 1, comportant chaque fois un diaphragme à chaque sortie haute pression, située en amont, de la pompe haute pression (1),
    caractérisé en ce que le rapport du diamètre du diaphragme par rapport au volume de pompe intégré est 0,006 à 0,02 l/cm2.
  3. Système d'injection suivant la revendication 1 et 2, caractérisé en ce que le rapport de la conduite de carburant (5.1, 5.2, 5.3, 5.4), entre la pompe haute pression et l'injecteur concerné, et le volume de pompe intégré, est 3,0 à 9,0 1/cm2.
  4. Système d'injection suivant une ou plusieurs des revendications précédentes, caractérisé par les quotients suivants:
    a) longueur de conduite rapporté au volume de pompe intégré: 4,4 l/cm2
    b) diamètre du diaphragme rapporté au volume de pompe intégré: 0,008 1/cm2.
    c) diamètre de conduite rapporté au volume de pompe intégré: 0,03 1/cm2
    d) volume d'injecteur rapporté au volume de pompe intégré: 0,1.
  5. Système d'injection suivant l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'injecteur présente, pour l'agrandissement du volume, un deuxième alésage haute pression.
EP04787218A 2003-10-31 2004-09-27 Systeme d'injection pour moteur a combustion interne, notamment moteur diesel Expired - Lifetime EP1627146B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003150892 DE10350892A1 (de) 2003-10-31 2003-10-31 Einspritzsystem für eine Brennkraftmaschine, insbesondere für einen Dieselmotor
PCT/EP2004/052318 WO2005042966A1 (fr) 2003-10-31 2004-09-27 Systeme d'injection pour moteur a combustion interne, notamment moteur diesel

Publications (2)

Publication Number Publication Date
EP1627146A1 EP1627146A1 (fr) 2006-02-22
EP1627146B1 true EP1627146B1 (fr) 2007-04-18

Family

ID=34529973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04787218A Expired - Lifetime EP1627146B1 (fr) 2003-10-31 2004-09-27 Systeme d'injection pour moteur a combustion interne, notamment moteur diesel

Country Status (3)

Country Link
EP (1) EP1627146B1 (fr)
DE (2) DE10350892A1 (fr)
WO (1) WO2005042966A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005012928A1 (de) 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111365A (en) * 1973-12-26 1978-09-05 Isuzu Motors Limited Fuel injection system and its nozzle holder
EP0262539B1 (fr) * 1986-09-25 1991-01-09 Ganser-Hydromag Soupape d'injection de combustible
DE69619949T2 (de) * 1995-12-19 2002-11-14 Nippon Soken, Inc. Speicherkraftstoffeinspritzvorrichtung
DE19737968C1 (de) * 1997-08-30 1998-12-10 Daimler Benz Ag Kraftstoffeinspritzanlage für eine mehrzylindrige Brennkraftmaschine
DE10118884A1 (de) * 2001-04-18 2002-11-07 Bosch Gmbh Robert Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine
DE10143423A1 (de) * 2001-09-05 2003-05-08 Bosch Gmbh Robert Kraftstoffeinspritzsystem mit hydraulisch von der Zuleitung entkoppeltem Injektor

Also Published As

Publication number Publication date
EP1627146A1 (fr) 2006-02-22
WO2005042966A1 (fr) 2005-05-12
DE10350892A1 (de) 2005-06-09
DE502004003549D1 (de) 2007-05-31

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