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EP0532377A1 - Dispositif de positionnement d'un arbre à cames de moteur à combustion interne et arbre à cames utilisant ce dispositif - Google Patents

Dispositif de positionnement d'un arbre à cames de moteur à combustion interne et arbre à cames utilisant ce dispositif Download PDF

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Publication number
EP0532377A1
EP0532377A1 EP92402273A EP92402273A EP0532377A1 EP 0532377 A1 EP0532377 A1 EP 0532377A1 EP 92402273 A EP92402273 A EP 92402273A EP 92402273 A EP92402273 A EP 92402273A EP 0532377 A1 EP0532377 A1 EP 0532377A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
carried
angular positioning
cylinder head
reference surface
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.)
Withdrawn
Application number
EP92402273A
Other languages
German (de)
English (en)
French (fr)
Inventor
Guy Dardelet
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.)
Renault SA
Regie Nationale des Usines Renault
Original Assignee
Renault SA
Regie Nationale des Usines Renault
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 Renault SA, Regie Nationale des Usines Renault filed Critical Renault SA
Publication of EP0532377A1 publication Critical patent/EP0532377A1/fr
Withdrawn legal-status Critical Current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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F01L1/024—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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a device for positioning a camshaft of an internal combustion engine fitted in particular to motor vehicles as well as a camshaft arranged according to this device.
  • It relates more particularly to a device allowing the angular setting of a camshaft equipping an engine of the type with overhead camshafts, for the installation of the elements of the distribution control: drive pinion and toothed transmission belt (or chain).
  • the angular positioning of the camshaft is operated by initially positioning the crankshaft so that the piston of cylinder 1 is in top dead center.
  • the distribution control is then set up by means of predetermined marks carried by the toothed belt and the drive pinions of the crankshaft and the camshaft.
  • the angular indexing between the camshaft and crankshaft pinions and respectively the camshaft and the crankshaft also being obtained in a predetermined manner by keying.
  • the invention relates to a device for very precisely positioning the camshaft prior to the installation of the elements of the timing control, the latter therefore no longer participating in the setting of the camshaft.
  • the device relates more particularly to engines of the overhead camshaft type where the camshaft is rotatably mounted in bearings carried by the cylinder head.
  • the device for angular positioning of a camshaft is characterized in that it comprises at least one mark carried by the camshaft, at least one mark carried by the cylinder head or the cylinder head cover and wedging means able to cooperate with each of said pins so as to immobilize the camshaft in a predetermined angular position.
  • said reference mark carried by the cylinder head is formed by a flat reference surface, extending parallel to the axis of rotation of the camshaft.
  • said reference surface carried by the cylinder head is formed by the upper tab.
  • said wedging means comprise at least a first bearing face having a flat surface, said face being intended to come to rest on said reference surface carried by the cylinder head.
  • said reference mark carried by the camshaft is formed by at least one reference surface.
  • said wedging means comprise a second bearing face having a surface complementary to said reference surface of the camshaft, said second face being intended to come into contact of said reference surface carried by the camshaft and on the other hand, said second bearing face not being parallel to said first bearing face.
  • said reference mark carried by the camshaft is defined by two parallel plates machined at the periphery of the camshaft, said plates extending parallel to the axis longitudinal of the camshaft.
  • said wedging means are constituted by a monobloc tool comprising two parallel faces intended to grip the two dishes and a bearing surface intended to rest on the reference surface of the breech.
  • Said tool is more precisely constituted by a U-shaped stirrup, said stirrup being formed by a body comprising in two arms protruding, said arms having parallel and straight opposite side faces intended to come into contact with the plates carried by the camshaft and coplanar transverse ends intended to lie flat on the reference surface of the cylinder head.
  • said reference mark carried by the camshaft is formed by a cylindrical bore extending perpendicular to the longitudinal axis of the camshaft.
  • said wedging means are formed by a one-piece M-shaped tool, comprising a body projecting from a cylindrical rod intended to be introduced into the bore carried by the camshaft and two arms extending on either side of said rod, said arms having coplanar transverse ends intended to lie flat on the reference surface of the cylinder head.
  • the camshaft has a second mark enabling the orientation of the reference surface carried by the camshaft to be specified.
  • said first and second bearing faces of said wedging means extend perpendicular to each other.
  • Figures 1 and 2 therefore schematically represent the upper face of a cylinder head (1) of an internal combustion engine, only the constituent parts of the engine necessary for understanding the invention have been shown.
  • the internal combustion engine petrol or diesel
  • the camshaft (2) is therefore mounted on the cylinder head, in a manner known per se, rotatable in bearings carried by the latter.
  • the distribution control no longer participates in the timing of the camshaft.
  • the timing is directly effected from predetermined marks carried respectively by the frame of the engine block and the camshaft, timing means capable of cooperating with the marks to immobilize the camshaft in a predetermined angular position.
  • the camshaft (2) In the vicinity of one of its longitudinal ends and in line with the upper tab (6) of the cylinder head, the camshaft (2) therefore has a positioning reference mark consisting of two parallel plates (5) machined to the periphery of the tree. These two plates (5), which extend parallel to the axis of the camshaft, are intended to be positioned in a predetermined manner relative to the flat surface extending parallel to the axis of rotation -from l 'camshaft which is defined by the upper tablature (6) of the cylinder head and which thus constitutes another positioning reference.
  • the two plates are positioned at the periphery of the camshaft so that the timing of the camshaft is achieved when these two plates (5) are perpendicular to the plane of the tablature (6), see FIG. 2.
  • stirrup in inverted U shape.
  • This stirrup comprises a body (3) comprising two projecting arms (8), these arms (8) have planar and parallel internal lateral faces (4) capable of coming to bear on the two flats (5) of the shaft to cams, while the transverse ends (7) are coplanar and extend perpendicular to said parallel faces (4).
  • the positioning of the dishes (5) at right angles to the plane of the tablature (6) generates two angular positions of the camshaft, 180 ° from one another.
  • the angular position of the camshaft (2) is then very precisely adjusted. It is shown that with normal production details of the dishes (5), of the different reference faces of the stirrup (4,7) and of the tablature (6) of the cylinder head (2), the shaft is positioned at cams with a dispersion of only 30 minutes of angle.
  • the camshaft (2) being positioned, it then suffices to fix the drive pinion at the end of the shaft by simple screwing to the torque and to put in place the other elements of the distribution control.
  • the timing of the camshaft is operated by positioning the bore (51) perpendicular to the plane of the tablature (6), the positioning ambiguity being removed in accordance with the device described above.
  • a one-piece adapted tool in the form of an M is used for setting it.
  • the tool has a body (31) provided with a cylindrical central rod (41) capable of being received in the bore (51) of the shaft to cams (21), this rod (41) being surrounded by two substantially parallel arms (81) having coplanar support ends (71) extend perpendicular to said rod (41).
  • the device which has just been described in accordance with FIGS. 1 to 4, is extremely simple to implement since it requires, in all and for all, only the production of the two plates or the drilling, at the end of the camshaft, while keying requires the production of two holes and the installation of an insert, which for mass production represents a significant gain.
  • the device allows very precise timing of the camshaft since it allows dispersions to be limited to 30 minutes of angles.
  • the device also has the advantage of being perfectly insensitive to variations in the positioning of the camshaft relative to the cylinder head (unlike the setting method according to the prior art via the distribution control where any variation in distance between the crankshaft and the camshaft generates a phase shift).
  • the purpose of the tool is to set the reference surfaces of the camshaft and the cylinder head to Right angle, it is possible to move the contact points between the tool and these reference surfaces without calling into question the angularity.
  • the invention includes all the technical equivalents of the means described and their combinations if these are carried out according to the spirit.
  • the upper tab of the cylinder head can be replaced as a reference surface by the cylinder head cover.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP92402273A 1991-09-13 1992-08-12 Dispositif de positionnement d'un arbre à cames de moteur à combustion interne et arbre à cames utilisant ce dispositif Withdrawn EP0532377A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111308 1991-09-13
FR9111308A FR2681376A1 (fr) 1991-09-13 1991-09-13 Dispositif de positionnement d'un arbre a cames de moteur a combustion interne et arbre a cames utilisant ce dispositif.

Publications (1)

Publication Number Publication Date
EP0532377A1 true EP0532377A1 (fr) 1993-03-17

Family

ID=9416917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402273A Withdrawn EP0532377A1 (fr) 1991-09-13 1992-08-12 Dispositif de positionnement d'un arbre à cames de moteur à combustion interne et arbre à cames utilisant ce dispositif

Country Status (2)

Country Link
EP (1) EP0532377A1 (no)
FR (1) FR2681376A1 (no)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845397A (en) * 1997-02-21 1998-12-08 Cummins Engine Company, Inc. Static timing method for heavy duty diesel engines
WO2004106716A1 (en) * 2003-05-30 2004-12-09 International Engines South America Ltda. An internal combustion engine and an engine housing
AT501132A1 (de) * 2004-11-11 2006-06-15 Avl List Gmbh Brennkraftmaschine
FR2885661A1 (fr) * 2005-05-12 2006-11-17 Renault Soc Par Actions Simpli Moteur thermique comportant des arbres d'equilibrage susceptibles d'etre immobilises par une epingle
US20120152191A1 (en) * 2009-12-07 2012-06-21 Daisuke Yoshika Variable valve actuation device for internal combustion engine
CN112228177A (zh) * 2020-11-02 2021-01-15 安徽华菱汽车有限公司 一种发动机凸轮轴装配正时结构
WO2025040851A1 (fr) * 2023-08-22 2025-02-27 Stellantis Auto Sas Ensemble comportant un moteur thermique avec culasse, couvre-culasse et outil de calage d'un arbre a cames

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3021995B1 (fr) * 2014-06-06 2016-07-01 Peugeot Citroen Automobiles Sa Dispositif de positionnement d'un arbre a cames

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738629A1 (de) * 1986-11-25 1988-06-01 Steyr Daimler Puch Ag Geraet zum verdrehen der nockenwelle einer hubkolben-brennkraftmaschine in ihre auf die kurbelwellendrehstellung bezogene grundstellung
DE3926430A1 (de) * 1989-08-10 1991-02-14 Audi Ag Verfahren und vorrichtung zum phasenrichtigen einstellen von nockenwellen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738629A1 (de) * 1986-11-25 1988-06-01 Steyr Daimler Puch Ag Geraet zum verdrehen der nockenwelle einer hubkolben-brennkraftmaschine in ihre auf die kurbelwellendrehstellung bezogene grundstellung
DE3926430A1 (de) * 1989-08-10 1991-02-14 Audi Ag Verfahren und vorrichtung zum phasenrichtigen einstellen von nockenwellen

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845397A (en) * 1997-02-21 1998-12-08 Cummins Engine Company, Inc. Static timing method for heavy duty diesel engines
WO2004106716A1 (en) * 2003-05-30 2004-12-09 International Engines South America Ltda. An internal combustion engine and an engine housing
CN100432393C (zh) * 2003-05-30 2008-11-12 国际引擎南美有限公司 内燃机
AT501132A1 (de) * 2004-11-11 2006-06-15 Avl List Gmbh Brennkraftmaschine
AT501132B1 (de) * 2004-11-11 2006-11-15 Avl List Gmbh Brennkraftmaschine
FR2885661A1 (fr) * 2005-05-12 2006-11-17 Renault Soc Par Actions Simpli Moteur thermique comportant des arbres d'equilibrage susceptibles d'etre immobilises par une epingle
WO2007003812A3 (fr) * 2005-05-12 2007-03-08 Renault Sa Moteur thermique comportant des arbres d'equilibrage susceptibles d'etre immobilises par une epingle
US7921825B2 (en) 2005-05-12 2011-04-12 Renault S.A.S. Engine comprising balance shafts locked by a pin
US20120152191A1 (en) * 2009-12-07 2012-06-21 Daisuke Yoshika Variable valve actuation device for internal combustion engine
CN102695852A (zh) * 2009-12-07 2012-09-26 三菱自动车工业株式会社 内燃机的可变气门装置
EP2511488A1 (en) * 2009-12-07 2012-10-17 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Variable valve gear for internal combustion engine
EP2511488A4 (en) * 2009-12-07 2013-04-10 Mitsubishi Motors Corp VARIABLE VALVE CONTROL FOR A COMBUSTION ENGINE
CN102695852B (zh) * 2009-12-07 2014-11-26 三菱自动车工业株式会社 内燃机的可变气门装置
US8939117B2 (en) 2009-12-07 2015-01-27 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Variable valve actuation device for internal combustion engine
CN112228177A (zh) * 2020-11-02 2021-01-15 安徽华菱汽车有限公司 一种发动机凸轮轴装配正时结构
WO2025040851A1 (fr) * 2023-08-22 2025-02-27 Stellantis Auto Sas Ensemble comportant un moteur thermique avec culasse, couvre-culasse et outil de calage d'un arbre a cames
FR3152288A1 (fr) * 2023-08-22 2025-02-28 Psa Automobiles Sa Ensemble comportant un moteur thermique avec culasse, couvre-culasse et outil de calage d’un arbre a cames

Also Published As

Publication number Publication date
FR2681376B1 (no) 1995-04-07
FR2681376A1 (fr) 1993-03-19

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