EP0757174B1 - Procédé de changement de l'avance d'une pompe d'injection de carburant et pompe d'injection de carburant - Google Patents

Procédé de changement de l'avance d'une pompe d'injection de carburant et pompe d'injection de carburant Download PDF

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Publication number
EP0757174B1
EP0757174B1 EP96111818A EP96111818A EP0757174B1 EP 0757174 B1 EP0757174 B1 EP 0757174B1 EP 96111818 A EP96111818 A EP 96111818A EP 96111818 A EP96111818 A EP 96111818A EP 0757174 B1 EP0757174 B1 EP 0757174B1
Authority
EP
European Patent Office
Prior art keywords
roller
bolt
fuel injection
tappet
injection pump
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
EP96111818A
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German (de)
English (en)
Other versions
EP0757174A2 (fr
EP0757174A3 (fr
Inventor
Hans Werner
Erhard Hilliger
Klaus Merseburg
Frank Prautzsch
Peter Teichert
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.)
WOODWARD GOVERNOR GERMANY GmbH
Original Assignee
WOODWARD GOVERNOR GERMANY GmbH
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Publication date
Application filed by WOODWARD GOVERNOR GERMANY GmbH filed Critical WOODWARD GOVERNOR GERMANY GmbH
Publication of EP0757174A2 publication Critical patent/EP0757174A2/fr
Publication of EP0757174A3 publication Critical patent/EP0757174A3/fr
Application granted granted Critical
Publication of EP0757174B1 publication Critical patent/EP0757174B1/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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • the invention relates to a method for changing the start of funding Fuel injection pumps for internal combustion engines, especially diesel engines, and a suitable fuel injection pump.
  • the delivery start setting of injection pumps for internal combustion engines is carried out by pre-stroke adjustment, i.e. Setting the distance between the pump support flange and associated roller tappet or camshaft. With the adjustment of the forward stroke becomes the ignition point, the stroke of the pump piston from bottom dead center of the cam until the start of funding.
  • roller tappets It is also known to adjust the roller tappets by means of a tappet screw or placing shims between the pump flange and the Engine block.
  • a delivery start setting is known in which the dead center of the respective associated engine cylinder via a piston distance measurement determined and used as the basis for the start of funding.
  • the actual adjustment is done by placing spacers under it. Placing shims or spacers under them requires repeated disassembly and assembly of the injection pump and the fuel supply, the Lube oil supply and the injection pressure line.
  • the invention was based on the object of a method for changing the start of funding to create fuel injection pumps with a roller tappet drive, this also applies to injection pumps already installed on the engine, including those with Integrated roller tappet drive, a significant reduction in dismantling and Assembly effort and a safe and reliable correction of the injection timing allows. It is also an object of the invention to provide a suitable fuel injection pump to accomplish.
  • the object is achieved in that the securing and fastening elements for the roller bolt to be loosened, the roller bolt with the roller in Transverse direction to the camshaft axis is shifted and by means of test gauges Aligned the roller pin in the desired start position and then is fixed to the roller tappet.
  • This new procedure enables the ignition timing to be corrected for the first time of injection pumps mounted on the engine with very little disassembly and Installation effort.
  • the horizontal axis becomes the camshaft axis Distance between the roller of the roller tappet and the camshaft path changed, and thereby the forward stroke of the pump piston is set.
  • the roller pin is displaceable transversely to the axis of the camshaft arranged, the holes in the roller bolt for fastening the roller bolt on the roller tappet as elongated holes that run transversely to the longitudinal axis of the roller bolt are trained.
  • the contact surfaces between the roller pin and the roller tappet are form-fitting, such that after moving the roller bolt with the roller transverse to the camshaft axis, a secure, precise location fixation the roller pin on the roller tappet is guaranteed.
  • the roller pin is thus non-positively and positively connectable to the roller tappet.
  • On the roller pin and / or roller tappets can control means, e.g. Markings to check the Position of the roller bolt can be provided.
  • the positive training of Contact surfaces between the roller plunger and the roller pin can be different Way.
  • the contact surfaces are flat and provided with a profile.
  • the profiles run parallel to Longitudinal axis of the roller pin and the profiles between the roller tappet and the roller pin correspond to each other.
  • the profiles are designed that they shift the roller bolt at intervals of some Enable tenths of a millimeter. After moving and aligning the roller pin the profiles snap into the desired position and ensure that slipping while the roller bolt is screwed onto the roller tappet the roller bolt is excluded.
  • a sawtooth is particularly well suited Profiling.
  • the profiles of the two contact surfaces can also be used as Tongues and grooves, as pins and holes or as a hemisphere and hemispherical Recess be formed.
  • the width of the profiled surface on the roller tappet is greater than on the roller pin.
  • the length of the elongated holes on the roller bolt should be the maximum desired Adjust the forward stroke on the pump piston.
  • the injection pump shown in Figure 1 consists of a one-piece pump housing 1, in which a pump cylinder 2, which has an axial bore, in which the Pump piston 3 is axially and rotatably guided, the stroke of the pump piston 3 is limited.
  • a pump work space is located above the pump piston 3 4, which is incorporated via inlet bores 5 with that in the pump housing 1
  • Fuel chamber 6 is connected when the pump piston 3 is in the lower Dead center position. During the upward movement of the pump piston 3 the inlet holes 5 are sealed.
  • the supply of the fuel in the Fuel chamber 6 takes place via pipelines with a fuel storage tank are connected, which is not shown.
  • the pump piston 3 is in his provided with a helical control edge 7 for implementation different useful strokes.
  • a connection between the pump work space 4 and the fuel chamber 6 can be produced via the inlet bores 5.
  • a spring-loaded pressure valve 10 is arranged, which a bore 12 arranged in the valve support 11 and an injection pressure line with communicates with the injector. The pressure line, the injector and the Injection nozzles are not shown in the drawing.
  • the pump cylinder 2 is followed by a spring chamber 13, in which one Pump spring 14 is arranged, which ensures that the roller 17 of the pump piston 3 attached roller tappet 16 constantly in contact with the injection cam 18 of the camshaft 19 (Fig. 2) is.
  • a lubricating oil chamber with a Lubricating oil supply and lubricating oil drain line arranged. It is also in the lower Area of the pump piston 3 a leakage barrier is provided, which prevents Fuel leaks via the spring chamber 13 into the engine's camshaft chamber can reach.
  • the operation of the injection pump is as follows.
  • the pump piston 3 is driven via the one mounted in the motor housing Camshaft 19 with the injection cam 18.
  • the stroke movement of the injection cam 18 via the roller 17 of the roller tappet 16 onto the pump piston 3 transfer.
  • the pump work space becomes 4 filled with fuel from the fuel chamber 6 via the inlet holes 5 is sucked in.
  • the inlet bores 5 in the pump cylinder 2 are closed after a certain stroke and the fuel is compressed.
  • the pressure valve 10 is opened and through the bore 12 in Valve carrier 11, the injection pressure line, the injection valve and the injection nozzle Fuel is pressed into the engine's combustion chamber under high pressure.
  • roller tappet 16 The structural design of the roller tappet 16 with the roller 17 for transferring the Stroke movement for the pump piston 3 is shown in more detail in Figures 2 to 4.
  • the roller 17, which is rotatably mounted on the roller pin 20, runs on the cam track of the injection cam 18.
  • the roller 17 is over the under spring pressure standing pressure piece 15 and the roller tappet 16 in constant contact with the cam track of the injection cam 18 held.
  • the roller pin 20 is by means of two fastening screws 21 which are guided through the roller bolt on Roller plunger 16 attached.
  • the two holes of the roller bolt 20 for the Fastening screws 21 are designed as elongated holes 22 which are transverse to the longitudinal axis of the roller pin 20 are arranged ( Figure 4).
  • the roller pin 20 instructs its two ends each have a flat flat region 23, with a sawtooth-like Profiling 25, which is arranged around the elongated holes 22.
  • the teeth of the Profiling 25 run parallel to the longitudinal axis of the roller bolt 20 and are each formed identically.
  • the rows of teeth are cut or milled formed by means of a suitable device.
  • On the two flat mounting surfaces 24 of the roller tappet 16 for the roller pin 20 are also parallel Rows of teeth incorporated as a profile, such that between the contact surfaces 23, 24 between roller plunger 16 and roller pin 20 a snap positive connection can be established.
  • the profiling between the two Contact surfaces 23, 24 which are aligned exactly parallel to the camshaft axis, enables a safe and precisely adjustable transverse displacement of the roller pin 20 with the roller 17, based on the camshaft axis.
  • the axial distance between the injection cam 18 and the roller 17th changed and thus the forward stroke of the pump piston 3 of the injection pump and thus the ignition timing, as the stroke of the pump piston from the bottom dead center of the cam until the start of funding.
  • the roller plunger 16 are depending on the required displaceability of the roller pin 20 from the central position more parallel rows of teeth arranged than on the roller pin.
  • On the roller tappet are. e.g. 30 rows of teeth and 20 rows of teeth attached to the roller pin.
  • roller bolt can be moved by 5 rows of teeth the middle position to the right or left, which changes the start of injection by ⁇ 2 ° crankshaft angle.
  • Side two position pins 26 attached and on the roller pin 20 are two corresponding Markers attached, making it possible to use a Distance gauge the desired displacement and exact alignment of the roller bolt to check.
  • a channel 27 is provided which opens into an annular channel 28, which a section is guided around the fastening screw 21 and in an axial channel 29 of the roller bolt 20 opens, from which a channel 30 leads to the lubrication point ( Figure 3).
  • the Elongated holes 22 in the roller bolt 20 by means of one held by the fastening screw 21 Plate 31 covered. At a visible point of the roller pin 20 and Plate 31 can be attached to markings on which the transverse displacement the roller bolt 20 can be read.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (15)

  1. Procédé de modification du début de refoulement de pompes d'injection pour moteurs à combustion interne, notamment pour moteurs diesel, munies d'un poussoir à galet fixé à l'extrémité inférieure du piston de pompe et muni d'un galet logé de façon susceptible de se déplacer par rotation, l'axe de galet étant fixé de façon amovible sur le poussoir à galet, et le galet étant situé sur la piste de la came reliée fixement à l'arbre à cames, caractérisé par le fait que les éléments de fixation et de blocage pour l'axe de galet sont détachés, l'axe de galet est déplacé avec le galet diagonalement par rapport à l'axe de l'arbre à cames et l'axe de galet est orienté dans la position de début de refoulement désirée au moyen de calibres de référence et est finalement fixé sur le poussoir à galet.
  2. Pompe d'injection pour moteurs à combustion interne, notamment pour moteurs diesel, composée d'un corps de pompe muni d'un cylindre de pompe et d'un piston de pompe qui est guidé de façon susceptible de se déplacer axialement et par rotation et qui est actionné par un poussoir à galet fixé à l'extrémité inférieure du piston de pompe, le galet logé sur un axe de galet de façon susceptible de se déplacer par rotation étant situé sur la piste d'une came reliée fixement à l'arbre à cames et l'axe de galet étant fixé de façon amovible sur le poussoir à galet, composée d'un espace de travail de pompe disposé au-dessus du piston de pompe se trouvant en position au point mort bas, relié à une chambre à carburant par l'intermédiaire d'alésages, et relié à la chambre de combustion du moteur par l'intermédiaire d'au moins une soupape d'injection munie d'un injecteur, composée d'une chambre de ressorts se trouvant au-dessus de l'arbre à cames ainsi que d'au moins une chambre de lubrification située dans le cylindre de pompe et reliée à une conduite d'arrivée et une conduite d'évacuation de l'huile de graissage, caractérisée par le fait que l'axe de galet (20) est disposé de façon susceptible d'être déplacé diagonalement par rapport à l'arbre à cames (19), les alésages situés dans l'axe de galet (20) destinés à fixer l'axe de galet (20) sur le poussoir à galet (16) étant configurés en trous oblongs (22) s'étendant diagonalement par rapport à l'axe longitudinal de l'axe de galet (20), et les surfaces de contact (23,24) situées entre l'axe de galet (20) et le poussoir à galet (16) présentant une fermeture géométrique de telle façon qu'un positionnement fixe, exact et sûr de l'axe de galet (20) sur le poussoir à galet (16) est garanti après le déplacement de l'axe de galet (20) avec le galet (17) diagonalement par rapport à l'axe de l'arbre à cames (19).
  3. Pompe d'injection selon la revendication 2, caractérisée par le fait que des moyens de contrôle (26) destinés à vérifier la position de l'axe de galet (20) sont prévus sur l'axe de galet (20) et/ou le poussoir à galet (16).
  4. Pompe d'injection selon la revendication 3, caractérisée par le fait que des repères sont placés en tant que moyens de contrôle des deux côtés du poussoir à galet (16) et/ou de l'axe de galet (20).
  5. Pompe d'injection selon la revendication 3, caractérisée par le fait que des chevilles (26) destinées à mesurer l'écart sont placées des deux côtés du poussoir à galet (16).
  6. Pompe d'injection selon l'une des revendications 2 à 5, caractérisée par le fait que les surfaces de contact (23,24) situées entre le poussoir à galet (16) et l'axe de galet (20) sont configurées en surfaces planes présentant un profilage (25), les profilages (25) s'étendant parallèlement à l'axe longitudinal de l'axe de galet (20).
  7. Pompe d'injection selon la revendication 6, caractérisée par le fait que les profilages (25) sont configurés en dents de scie.
  8. Pompe d'injection selon la revendication 6, caractérisée par le fait que les profilages (25) sont configurés en rainures et languettes susceptibles de s'engrener les unes dans les autres.
  9. Pompe d'injection selon la revendication 6, caractérisée par le fait que les profilages (25) sont configurés en chevilles et en trous susceptibles de s'engrener les uns dans les autres.
  10. Pompe d'injection selon la revendication 6, caractérisée par le fait que les profilages (25) sont configurés en hémisphères et en creux hémisphériques susceptibles de s'engrener les uns dans les autres.
  11. Pompe d'injection selon l'une des revendications 2 à 10, caractérisée par le fait que la largeur de la surface de contact profilée (24) du poussoir à galet (16) est supérieure à la largeur de la surface de contact profilée (23) de l'axe de galet (20).
  12. Pompe d'injection selon l'une des revendications 2 à 11, caractérisée par le fait que la longueur des trous oblongs (22) de l'axe de galet (20) est adaptée à la modification maximale de la précourse du piston de pompe (3).
  13. Pompe d'injection selon l'une des revendications 2 à 12, caractérisée par le fait que chaque trou oblong (22) de l'axe de galet (20) est recouvert par une plaque (31) maintenue par le boulon d'attache (21).
  14. Pompe d'injection selon la revendication 13, caractérisée par le fait que des repères sont placés sur la plaque (31).
  15. Pompe d'injection selon l'une des revendications 2 à 14, caractérisée par le fait qu'un canal annulaire (28) relié au système de canal de lubrification situé dans l'axe de galet (20) est disposé autour d'un tronçon du boulon d'attache (21) en vue de la lubrification du galet (17) logé sur l'axe de galet (20) de façon susceptible de tourner.
EP96111818A 1995-07-31 1996-07-23 Procédé de changement de l'avance d'une pompe d'injection de carburant et pompe d'injection de carburant Expired - Lifetime EP0757174B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527720A DE19527720A1 (de) 1995-07-31 1995-07-31 Verfahren zur Veränderung des Förderbeginns von Kraftstoffeinspritzpumpen und Kraftstoffeinspritzpumpe
DE19527720 1995-07-31

Publications (3)

Publication Number Publication Date
EP0757174A2 EP0757174A2 (fr) 1997-02-05
EP0757174A3 EP0757174A3 (fr) 1997-11-26
EP0757174B1 true EP0757174B1 (fr) 2002-03-20

Family

ID=7768090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111818A Expired - Lifetime EP0757174B1 (fr) 1995-07-31 1996-07-23 Procédé de changement de l'avance d'une pompe d'injection de carburant et pompe d'injection de carburant

Country Status (5)

Country Link
EP (1) EP0757174B1 (fr)
JP (1) JPH09100760A (fr)
AT (1) ATE214787T1 (fr)
DE (2) DE19527720A1 (fr)
DK (1) DK0757174T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775203A (en) * 1997-01-28 1998-07-07 Cummins Engine Company, Inc. High pressure fuel pump assembly
DE19729793A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Kolbenpumpe zur Kraftstoffhochdruckversorgung
DE19857376A1 (de) 1998-12-12 2000-06-15 Mahle Ventiltrieb Gmbh Rollenstößel
DE19938504A1 (de) * 1999-08-13 2001-03-08 Bosch Gmbh Robert Einzylinder-Hochdruckpumpe
JP3905282B2 (ja) 2000-04-18 2007-04-18 トヨタ自動車株式会社 高圧ポンプ
DE10156428A1 (de) * 2001-11-16 2003-06-12 Bosch Gmbh Robert Kraftstoffgekühltes Pumpenelement und Hochdruckpumpe für eine Kraftstoffeinspritzanlage
DE102016224347B4 (de) * 2016-12-07 2018-06-21 Robert Bosch Gmbh Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems, mit einer Stößel-Baugruppe die eine Verdrehsicherung und eine Schmierstoffversor- gung der Laufrolle durch einen verlängerten Lagerbolzen aufweist

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765806A (en) * 1980-10-07 1982-04-21 Hitachi Zosen Corp Computer controlling diesel engine
JPS6267278A (ja) * 1985-09-20 1987-03-26 Mitsubishi Heavy Ind Ltd 燃料噴射タイミング変更装置
DE3643271A1 (de) * 1986-12-18 1988-06-23 Kloeckner Humboldt Deutz Ag Einspritzpumpe mit integrierter spritzverstellvorrichtung
DE4003469C2 (de) * 1990-02-06 1998-04-16 Deutz Ag Förderbeginn-Einstellung von Einzeleinspritzpumpen bei der Motorenmontage von Hubkolben-Brennkraftmaschinen mit mehreren Zylindern

Also Published As

Publication number Publication date
ATE214787T1 (de) 2002-04-15
EP0757174A2 (fr) 1997-02-05
DK0757174T3 (da) 2002-07-15
EP0757174A3 (fr) 1997-11-26
JPH09100760A (ja) 1997-04-15
DE59608903D1 (de) 2002-04-25
DE19527720A1 (de) 1997-02-06

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