EP0417086B1 - Procede et dispositif de reglage d'arbres a cames - Google Patents

Procede et dispositif de reglage d'arbres a cames Download PDF

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Publication number
EP0417086B1
EP0417086B1 EP88904695A EP88904695A EP0417086B1 EP 0417086 B1 EP0417086 B1 EP 0417086B1 EP 88904695 A EP88904695 A EP 88904695A EP 88904695 A EP88904695 A EP 88904695A EP 0417086 B1 EP0417086 B1 EP 0417086B1
Authority
EP
European Patent Office
Prior art keywords
shafts
camshafts
crankshaft
transmission
wheels
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
EP88904695A
Other languages
German (de)
English (en)
Other versions
EP0417086A1 (fr
Inventor
Bernt Ejbyfeldt
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.)
Volvo AB
Original Assignee
Volvo AB
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 Volvo AB filed Critical Volvo AB
Priority to AT88904695T priority Critical patent/ATE81186T1/de
Publication of EP0417086A1 publication Critical patent/EP0417086A1/fr
Application granted granted Critical
Publication of EP0417086B1 publication Critical patent/EP0417086B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01L1/024—Belt drive
    • 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
    • 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
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/06—Endless member is a belt
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the present invention relates to a method and an apparatus according to the introductory portions of Claims 1 and 3, respectively.
  • DE-A-3 131 278 a method and an apparatus according to the introductory portions of Claims 1 and 3 is known for an engine with only one camshaft, and in DE-A-3 029 858 a transmission similar to that defined in the Claims is known.
  • the object of the invention is to achieve a method of camshaft setting for an automobile engine with dual camshafts which does not have the mentioned disadvantages, and which is simple to carry out and permits the setting to be performed by a single person.
  • FIG. 1 A conventional engine is illustrated in Fig. 1, as seen from the front.
  • the crankshaft has a transmission wheel 1 which, when the engine is in operation, drives two camshafts via a toothed belt 2 by co-action with their transmission wheels 3, 4.
  • the belt 2 further runs over a jockey pulley 5 and over a hydraulic belt tightener 6, which automatically ensures that correct belt tension is maintained.
  • the transmission wheels 3 and 4 are fixed to the camshafts by a suitable type of releasable frictional joint so that the wheels are readily made rotatable relative the respective shaft.
  • the basic concept of the invention is thus enabled, namely of utilizing machined surfaces on the shafts for achieving a more accurate setting.
  • an abutment 7 on the rear counterweight 8 of the crankshaft for setting the angular position of the crankshaft.
  • this abutment is illustrated as being in engagement with a tool 9, which is inserted in a bore in the crankcase.
  • crankshaft 1 other surfaces of a crankshaft can be utilized together with a complemental tool for setting the crankshaft 1 in a well-defined angular position.
  • the abutment on the rear counterweight of the crankshaft is a particularly suitable surface, since this also constitutes a reference surface in the production of the crankshaft.
  • the engine to which the invention is applied has dual camshafts 10, 11.
  • the same principle can be used for the camshafts as for the crankshafts, for their individual setting, e.g. by allowing a cam surface on the camshaft to co-act with a complemental tool inserted in an opening in the cylinder block, a combination tool 12 is used for simultaneously setting the angular position of both camshafts 10, 11, as indicated in fig. 2.
  • the combination tool 12 is shown to a larger scale in Figs. 3 and 4, and principally comprises two levers 13, 14 with rectangular cross-section, the opposing end portions of the levers being unrotatably connectable to the rear ends of the respective camshafts 8, 11, the other end portions of these levers engaging flat against each other in the set position of the camshafts, whereby a well-defined angular position of the latter is achieved.
  • the un-rotatable connection between camshaft end and lever can be achieved by the camshaft end being provided with a transverse slot, which co-acts with a complemental transverse projection 16 arranged on the corresponding lever end portion and is screwed into a thread in the camshaft end for fixing the lever axially.
  • the camshafts can be locked in their set positions with the aid of a nut 18 screwed onto a bolt 17 projecting out from the lever 14 and accommodated in a hole in the lever 13.
  • the transmission wheels 3 and 4 are rigidly connected to their respective shafts and the belts are tensioned.
  • the first step of the method is to loosen the respective friction joint on the camshafts so that these can be turned relative the transmission wheels.
  • the angular positions of the camshafts are then set by the levers 13, 14 being taken into engagement against each other as illustrated in Fig. 2 by full lines, and the levers are locked in this position with the aid of the nut 18.
  • the crankshaft is then turned to the position illustrated in Fig. 1 with the abutment 7 in engagement against the tool 9. While maintaining the set position of the crankshaft the friction joints between transmission wheels and shafts are then tightened, and the tools 9 and 12 are removed.
  • the camshaft setting is thus completed.
  • the crankshaft transmission wheel 1 does not need to be rotatable relative the crankshaft, since the rotation of wheels 3, 4 caused by this wheel do not affect the setting of the camshafts.
  • setting by eye is completely avoided in the inventive method, and the accuracy will be solely dependent on the manufacturing tolerances for the machined setting surfaces on the shafts and for the tools, and it is therefore possible to achieve very high setting accuracy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Friction Gearing (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Paper (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (4)

1- Procédé de réglage de la position angulaire des arbres à cames (10,11) d'un moteur de véhicule automobile ayant deux arbres à cames, par rapport à la position angulaire du vilebrequin, les arbres à cames étant entraînés par le vilebrequin par l'intermédiaire d'une transmission comprenant des poulies de transmission (1,3,4) reliées aux arbres respectifs, les poulies de transmission (3,4) au moins étant reliées aux arbres à cames (10,11) de façon libérable par rapport à ceux-ci de manière qu'ils puissent être tournés par rapport à leurs poulies et que ces dernières puissent être bloquées dans des positions angulaires choisies, comprenant les phases consistant à libérer les arbres de leurs poulies de transmission associées (1,3,4), à faire tourner ensuite chacun des arbres jusque dans une position d'arrêt prédéterminée à l'aide d'un outil combiné qui est astreint à coopérer d'une façon prédéterminée avec une surface usinée bien définie (7,15) de l'arbre, et en bloquant ensuite la poulie de transmission respective sur son arbre, procédé caractérisé en ce qu'un outil (12) comprenant deux leviers (13,14) est appliqué sur les arbres à cames, une partie d'extrémité de chaque levier étant reliée de façon non rotative à une surface usinée bien définie de l'arbre à cames respectif, dans une position prédéterminée, les autres parties d'extrémités des leviers étant prises ensemble, et en contact l'une contre l'autre, obtenant ainsi la position d'arrêt des arbres à cames.
2- Procédé suivant la revendication 1, caractérisé en ce qu'une butée (7) est amenée en contact contre un outil (9) en faisant tourner le vilebrequin, l'outil étant inséré dans un trou du carter en face de la butée, cette butée étant située sur le contrepoids arrière (8) du vilebrequin et étant utilisée comme surface de référence pour la fabrication du vilebrequin.
3- Appareil pour la mise en oeuvre du procédé suivant la revendication 1 sur un moteur de véhicule automobile comportant deux arbres à cames entraînés par le vilebrequin du moteur par l'intermédiaire d'une transmission comprenant des poulies de transmission (1,3,4) reliées aux arbres respectifs, au moins les poulies de transmission (3,4) reliées aux arbres à cames (10,11) étant reliées de façon libérable à leurs arbres respectifs et étant aptes à être bloquées sur ceux-ci dans des positions angulaires choisies par rapport à leurs arbres, caractérisé par un outil combiné (12) comprenant deux leviers (13,14), une partie d'extrémité de chaque levier étant apte à être reliée de façon non rotative à une surface usinée bien définie de l'arbre à cames respectif (10,11) dans une position prédéterminée, les autres parties d'extrémité comportant des surfaces coopérantes définissant une position d'arrêt pour le réglage des arbres à cames lorsqu'elles sont amenées en contact l'une avec l'autre.
4- Appareil suivant la revendication 3, caractérisé en ce qu'il comprend un alésage dans le carter, situé directement en face du contrepoids arrière du vilebrequin, et dans lequel un outil (9) peut être inséré afin de coopérer avec une butée (7) sur ce contrepoids.
EP88904695A 1987-05-13 1988-05-10 Procede et dispositif de reglage d'arbres a cames Expired - Lifetime EP0417086B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88904695T ATE81186T1 (de) 1987-05-13 1988-05-10 Vorrichtung und verfahren zur regelung von nokkenwellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8701959 1987-05-13
SE8701959A SE458137B (sv) 1987-05-13 1987-05-13 Foerfarande och anordning vid en bilmotor med dubbla kamaxlar

Publications (2)

Publication Number Publication Date
EP0417086A1 EP0417086A1 (fr) 1991-03-20
EP0417086B1 true EP0417086B1 (fr) 1992-09-30

Family

ID=20368494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88904695A Expired - Lifetime EP0417086B1 (fr) 1987-05-13 1988-05-10 Procede et dispositif de reglage d'arbres a cames

Country Status (6)

Country Link
EP (1) EP0417086B1 (fr)
JP (1) JPH02503459A (fr)
AT (1) ATE81186T1 (fr)
DE (1) DE3875123T2 (fr)
SE (1) SE458137B (fr)
WO (1) WO1988008918A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832812A1 (de) * 1988-09-28 1990-03-29 Kloeckner Humboldt Deutz Ag Vorrichtung zur einstellung der steuerzeiten an einer brennkraftmaschine, deren nockenwelle ueber einen zahnriemen, eine kette oder auch einen zahnraedertrieb angetrieben wird
DE10149109C1 (de) * 2001-10-05 2002-11-28 Audi Ag Verfahren und Werkzeug zum phasenrichtigen Einstellen von Nockenwellen
BR0302062B1 (pt) * 2003-05-30 2011-12-13 motor de combustão interna e carcaça de motor.
FR2855553B1 (fr) * 2003-06-02 2007-06-08 Inst Francais Du Petrole Moteur a combustion interne a culasse mobile, notamment moteur pour essais
FR2897400B1 (fr) * 2006-02-10 2009-06-05 Renault Sas Piece de blocage d'un volant moteur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1262670B (de) * 1965-01-04 1968-03-07 Renault Brennkraftmaschine mit obenliegender Nockenwelle
DE3029858A1 (de) * 1979-08-08 1981-02-19 Denzel Kraftfahrzeug Wolfgang Nockenwellenantrieb fuer brennkraftmaschinen
DE3131278A1 (de) * 1981-08-07 1983-02-24 Bayerische Motoren Werke AG, 8000 München Verfahren und vorrichtung zum einstellen der ventilsteuerung einer hubkolben-brennkraftmaschine, insbes. eines diesel-motors

Also Published As

Publication number Publication date
SE8701959L (sv) 1988-11-14
SE458137B (sv) 1989-02-27
EP0417086A1 (fr) 1991-03-20
JPH02503459A (ja) 1990-10-18
DE3875123D1 (de) 1992-11-05
DE3875123T2 (de) 1993-02-18
SE8701959D0 (sv) 1987-05-13
WO1988008918A1 (fr) 1988-11-17
ATE81186T1 (de) 1992-10-15

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