EP1273795B1 - Procédé et dispositif d'injection de combustible - Google Patents

Procédé et dispositif d'injection de combustible Download PDF

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Publication number
EP1273795B1
EP1273795B1 EP02008887A EP02008887A EP1273795B1 EP 1273795 B1 EP1273795 B1 EP 1273795B1 EP 02008887 A EP02008887 A EP 02008887A EP 02008887 A EP02008887 A EP 02008887A EP 1273795 B1 EP1273795 B1 EP 1273795B1
Authority
EP
European Patent Office
Prior art keywords
injection
pump piston
pump
piston
eccentric
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
EP02008887A
Other languages
German (de)
English (en)
Other versions
EP1273795A2 (fr
EP1273795A3 (fr
Inventor
Udo Schlemmer-Kelling
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.)
Caterpillar Motoren GmbH and Co KG
Original Assignee
Caterpillar Motoren GmbH and Co KG
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 Caterpillar Motoren GmbH and Co KG filed Critical Caterpillar Motoren GmbH and Co KG
Publication of EP1273795A2 publication Critical patent/EP1273795A2/fr
Publication of EP1273795A3 publication Critical patent/EP1273795A3/fr
Application granted granted Critical
Publication of EP1273795B1 publication Critical patent/EP1273795B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F02D1/162—Adjustment of injection timing by mechanical means dependent on engine speed for angular adjustment of driving and driven shafts
    • 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
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders

Definitions

  • a control device such as Eccentric device
  • the object of the invention is a method and a device for injecting fuel into a combustion chamber to create a diesel engine with the harmful Exhaust emissions in a simple manner at predetermined Load conditions of the engine are herabsetzbar.
  • the injection timing in the direction of "early" achievable is, that is, when the start of delivery and the injection time is done before a TDC position, is a so-called soot formation at partial and light load avoided.
  • This is done with an adjustment of the pump piston in the injection pump at partial load and low load achieved high injection pressure at the injector, the in a range of about minus 20 ° to minus 10 ° of the piston angle before TDC of the engine piston and in a range of Speed of the pump piston from about 2.5 to 3.5 m / s lies.
  • the high injection pressure at a crank angle of about minus 14 ° before TDC of the engine piston and at a Speed of about 3 m / s of the pump piston is.
  • the early start of delivery and injection time will be achieved by the pump piston of the injection pump with its control edge via a control rod in a conveying position in the direction of "late” is rotatable and this Twisting movement "late” an axial positioning movement to corresponding injection start in the direction of "early” on with the Pump piston operatively connected control device, such as a Eccentric, is superimposed.
  • the Pump piston operatively connected control device such as a Eccentric
  • the axial adjustment of the pump piston takes place in dependence from the piston position of the engine and this points the eccentric held on an eccentric Rocking lever on, with its free end by means of a roller between the pump piston and a camshaft is arranged and over the eccentric to the camshaft in an injection position in the direction of "early” adjustable is.
  • This eccentric adjustment makes it easier Way by adjusting the eccentric a start of delivery in Direction "early” or “late”, that is, the Roller can be adjusted according to the cam of the camshaft be so that according to the invention at part load or Low load, the adjustment in the direction of "early” is selectable and then, for example, at full load below again an adjustment towards “late” or otherwise can be made.
  • an internal combustion engine 1 for example a diesel engine, takes place by means of a fuel-conveying pump unit 2, via a pressure line 3 with an injection nozzle 4 is connected.
  • the injection pump 2 has an adjustable pump piston 5 with a control edge. 6 and a long groove 7.
  • the end of funding is determined by the position the control edge 6 after a rotation of the piston. 5 determined, which formed according to the objective is. Determining for the promotion are also the Zulaufbohronne 8, which are significantly contributing to the Delivery stroke and the delivery rate.
  • the axial increase of the pump piston 5 via a arranged on a rocker arm 9 roller 10, in operative connection with a cam 11 of a camshaft 16 is.
  • the adjustable according to the setting "early” or “late” is.
  • the position of the roller 10 changes to the cam 11 and the injection timing is variable, that is, the injection timing may be in accordance with Load condition of the engine to be changed, resulting in interaction with the promotion of the fuel over the position the control edge in the injection pump 2 takes place.
  • Fig. 2 in more detail with reference to the diagram, is the "early" injection time E1 before the "late” injection time E in a range of minus 20 ° to minus 10 ° of the crank angle K provided before the TDC and the injection occurs at a speed V of the pump piston 5 in a range of 2.5 to 3.5 M / s.
  • the injection timing is advanced by 14 ° crank angle K. and this at an increased piston speed V of 3 m / s of the injection pump 2.
  • the advance of the injection timing takes place at the shown embodiment by about 14 ° crank angle from E to E2, wherein the start of delivery of the fuel in particular by achieved the adjustment of the eccentric 12 on the pivot lever 9 and the shift of fuel production from approx. 1.8 m / s to 3.5 m / s by appropriate rotation of the Pump piston 5 to E1. Both measures allow a transfer of the start of delivery and the injection point in the direction of "early”.

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 And Controlling Fuel (AREA)

Claims (5)

  1. Procédé d'injection de combustible dans une chambre de combustion d'un moteur diesel au moyen d'un injecteur (4) relié par l'intermédiaire d'une conduite de pression (3) à une pompe d'injection (2) qui comprend un piston de pompe, un dispositif de commande (12), tel qu'un dispositif à excentrique, pour le réglage du début d'injection étant disposé entre le piston de pompe (5) et un arbre à cames (16), caractérisé par le fait que le piston de pompe (5) est réglable et présente une rampe de contrôle (6) qui coopère avec un orifice de contrôle (8), par le fait que par un réglage combiné du piston (5) dans la pompe d'injection (2), à charge partielle et à faible charge, une pression d'injection élevée est produite au niveau de l'injecteur (4) dans une zone d'environ moins 20° à moins 10° d'angle de manivelle (K) avant le point mort supérieur du piston du moteur et dans une zone de vitesse (V) du piston de pompe (5) d'environ 2,5 à 3,5 m/s, et par le fait que le piston de pompe (5) de la pompe d'injection (2) avec sa rampe de contrôle (6) peut être tourné à l'aide d'une crémaillère (15) dans une direction de refoulement « retardé » et qu'à cette rotation dans la direction « retardé » est combiné un réglage axial du début d'injection dans la direction « avancé » réalisé par l'intermédiaire du dispositif de commande lié fonctionnellement au piston de pompe (5).
  2. Procédé selon la revendication 1, caractérisé par le fait que la pression d'injection élevée est disponible pour un angle de manivelle (K) d'environ moins 14° avant le point mort supérieur du piston du moteur et une vitesse (V) d'environ 3 m/s du piston de pompe (5).
  3. Dispositif pour la mise en oeuvre du procédé selon revendication 1 ou 2, caractérisé par le fait que le dispositif à excentrique (12) comprend un levier oscillant (9) monté sur un excentrique, dont l'extrémité libre munie d'un galet (10) est disposée entre le piston de pompe (5) et un arbre à cames (16) et qui par l'intermédiaire de l'excentrique (12) peut être réglé dans la direction « avancé » par rapport à l'arbre à cames (16).
  4. Dispositif selon la revendication 3, caractérisé par le fait que l'excentrique (12) pour le réglage du galet (10) du levier oscillant (9) est réglable par rapport à l'arbre à cames (16) en fonction d'une charge partielle et d'une faible charge du moteur.
  5. Dispositif selon une des revendications 3 ou 4, caractérisé par le fait qu'une rotation directe de l'arbre à cames peut être opérée par l'intermédiaire d'un pignon d'entraínement.
EP02008887A 2001-07-04 2002-04-20 Procédé et dispositif d'injection de combustible Expired - Lifetime EP1273795B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10132363 2001-07-04
DE10132363 2001-07-04

Publications (3)

Publication Number Publication Date
EP1273795A2 EP1273795A2 (fr) 2003-01-08
EP1273795A3 EP1273795A3 (fr) 2004-08-25
EP1273795B1 true EP1273795B1 (fr) 2005-07-13

Family

ID=7690549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02008887A Expired - Lifetime EP1273795B1 (fr) 2001-07-04 2002-04-20 Procédé et dispositif d'injection de combustible

Country Status (3)

Country Link
EP (1) EP1273795B1 (fr)
AT (1) ATE299555T1 (fr)
DE (1) DE50203607D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2634389A1 (fr) 2012-02-28 2013-09-04 Caterpillar Motoren GmbH & Co. KG Fonctionnement d'une ignition automatique de moteurs à combustion interne de carburant alternatifs

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE523676T1 (de) 2008-06-18 2011-09-15 Caterpillar Motoren Gmbh & Co Vorrichtung zur steuerung des betriebs eines verbrennungsmotors
EP2677142B1 (fr) 2012-06-22 2015-02-25 Caterpillar Motoren GmbH & Co. KG Matériau de restauration dentaire
EP2752561B1 (fr) 2013-01-07 2015-04-08 Caterpillar Motoren GmbH & Co. KG Procédé et dispositif pour contrôler le fonctionnement d'un moteur à combustion interne
EP2752571B1 (fr) 2013-01-07 2015-08-19 Caterpillar Motoren GmbH & Co. KG Procédé et dispositif pour contrôler le fonctionnement d'un moteur à deux combustibles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT311727B (de) * 1971-11-04 1973-11-26 List Hans Einspritzpumpe für Dieselmotoren
FR2417642A1 (fr) * 1978-02-20 1979-09-14 List Hans Moteur a injection de carburant, notamment moteur diesel avec installation de reglage de l'instant d'injection
DE19721841A1 (de) * 1997-05-24 1998-09-03 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine selbstzündende Brennkraftmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2634389A1 (fr) 2012-02-28 2013-09-04 Caterpillar Motoren GmbH & Co. KG Fonctionnement d'une ignition automatique de moteurs à combustion interne de carburant alternatifs
WO2013127527A1 (fr) 2012-02-28 2013-09-06 Caterpillar Motoren Gmbh & Co. Kg Opération d'autoallumage de moteurs à combustion interne à carburant alternatif

Also Published As

Publication number Publication date
EP1273795A2 (fr) 2003-01-08
DE50203607D1 (de) 2005-08-18
EP1273795A3 (fr) 2004-08-25
ATE299555T1 (de) 2005-07-15

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