EP3240946B1 - Linguets de distribution arrêtés axialement par l'axe d'articulation et par la culasse - Google Patents

Linguets de distribution arrêtés axialement par l'axe d'articulation et par la culasse Download PDF

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Publication number
EP3240946B1
EP3240946B1 EP15817986.1A EP15817986A EP3240946B1 EP 3240946 B1 EP3240946 B1 EP 3240946B1 EP 15817986 A EP15817986 A EP 15817986A EP 3240946 B1 EP3240946 B1 EP 3240946B1
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EP
European Patent Office
Prior art keywords
cylinder head
pivot point
arrangement according
axial
finger follower
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.)
Active
Application number
EP15817986.1A
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German (de)
English (en)
French (fr)
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EP3240946A1 (fr
Inventor
Jean-Francois Moulin
Etienne DE-MALET
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 SAS
Original Assignee
Renault SAS
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Publication date
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Publication of EP3240946B1 publication Critical patent/EP3240946B1/fr
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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot

Definitions

  • the invention relates to an arrangement for a motor vehicle, comprising a cylinder head of a heat engine, a camshaft in rotation relative to the cylinder head, at least one articulation axis fixed on the cylinder head and offset with respect to the axis. camshaft rotation.
  • the invention also relates to a motor vehicle as such, comprising at least one such arrangement.
  • the object of the present invention is to provide an arrangement for a motor vehicle which overcomes the drawbacks listed above.
  • an object of the invention is to provide such an arrangement which is both simple in design and implementation, inexpensive, reliable, and easy to integrate in situations of reduced bulk at the cylinder head.
  • This object can be achieved by means of an arrangement for a motor vehicle, comprising a cylinder head of a heat engine, a camshaft in rotation relative to the cylinder head, at least one hinge pin fixed on the cylinder head and offset from the axis of rotation of the camshaft, and at least one distribution latch for controlling the intake and exhaust valves of the heat engine, mounted on the hinge pin and actuated according to an oscillating tilting movement around the articulation axis by a rotary cam of the camshaft, in which the axial stops of the distribution latch along the articulation axis are constituted by a blocking wall axial delimited by the cylinder head on the one hand and by the articulation axis on the other hand.
  • the articulation axis can form a shoulder delimiting an axial blocking face, said axial blocking face and said blocking wall forming axial stops in directions opposite for the distribution latch.
  • Each articulation axis can ensure the mounting of two angularly free distribution lugs relative to each other around the articulation axis.
  • Each articulation axis can comprise two pivot shafts aligned with each other and each ensuring the mounting with a sliding pivot connection of a corresponding distribution latch.
  • An axial play may be present between the distribution latch and the articulation axis of the oscillating arm on the one hand, and the axial locking wall on the other hand, between 0.05 mm and 0.2 mm.
  • the articulation axis is preferably constituted by a part, in particular of the monobloc type or in one piece, independent of the cylinder head and fixed on a bearing face delimited by the cylinder head.
  • the elements for fixing the articulation axis to the cylinder head comprise on the one hand at least one centering pin and on the other hand at least one fixing screw immobilizing the articulation axis of the swinging arm relative to the cylinder head in the position defined by the mechanical cooperation between each centering pin and the cylinder head, each centering pin and each fixing screw passing through through lumens formed through the axis of articulation of the swing arm.
  • the articulation axis can be parallel to the camshaft.
  • each distribution latch may include a zone in mechanical contact with the cam and mechanically urging a valve stem intended to be actuated in its translational movement by the movement oscillating of the distribution latch.
  • the arrangement includes an adjustment pad interposed between the valve and the dispensing latch.
  • a motor vehicle can include at least one such arrangement.
  • the invention which will now be described, with reference to figures 2 to 6 , generally relates to an arrangement for a motor vehicle, comprising a cylinder head 10 of a heat engine, a camshaft 11 rotating relative to the cylinder head 10, at least one hinge pin 15 fixed on the cylinder head 10 and offset relative to the axis of rotation of the camshaft 11.
  • the cylinder head 10 can optionally be equipped with a cylinder head cover 12, attached to an upper face of the one-piece remainder of the cylinder head 10.
  • the fixing of the shaft cam 11 on the cylinder head 10 can in particular be done in the lower part by this cylinder head block and in the upper part by the cylinder head cover 12, substantially in the manner of two shells immobilizing bearings or bearings.
  • the invention also relates to a motor vehicle as such, comprising at least one such arrangement.
  • the arrangement also comprises at least one distribution latch 14 intended for controlling the intake and exhaust valves 13 of the heat engine, mounted on the hinge pin 15 and actuated in an oscillating movement tilting around the hinge axis 15 by a rotary cam 111 of the camshaft 11.
  • the axial stops of the distribution latch 14 along the hinge axis 15 are constituted by an axial locking wall 101 delimited by the cylinder head 10 on the one hand, and by the articulation axis 15 on the other hand, in particular at the level of a suitable element of the articulation axis 15.
  • the term “distribution latch” can be replaced by the term “swing arm”, as soon as such a swing arm is configured so that it can fulfill the function mentioned above.
  • - screw of the valve 13 which is associated with it.
  • the hinge pin 15 forms in particular a shoulder delimiting an axial locking face 157.
  • the axial locking face 157 and the locking wall 101 form axial stops in opposite directions for the distribution latch 14 disposed and thus held axially therebetween.
  • each articulation axis 15 preferably ensures the mounting of two distribution latches 14 angularly free relative to each other around the articulation axis 15.
  • each articulation axis 15 can in particular comprise two pivot shafts 151 aligned with each other in the axial direction and each ensuring the mounting with sliding pivot connection of a corresponding distribution latch 14.
  • Each pivot shaft 151 defines at its distal end an axial face 155, intended to come opposite a corresponding axial locking wall 101.
  • a mounting clearance can be interposed between this axial face 155 and the axial locking wall 101, typically between 0.2 mm and 1 mm.
  • the hinge pin 15 is disposed between two axial locking walls 101 delimited by the cylinder head 10 and spaced apart by a distance greater than the distance separating the two axial faces 155 that the hinge pin 15 includes between them. The difference between these two distances defines the mounting clearances mentioned in the previous paragraph.
  • an axial clearance is present between the distribution latch 14 and the axial locking face 157 of the hinge pin 15 on the one hand, and the axial locking wall 101 on the other hand, typically between 0, 05 mm and 0.2 mm.
  • Adjustment between hinge pin 15 and latch distribution 14 is preferably of the sliding axial type, such as a standard adjustment of the H7g6 type.
  • This arrangement has the advantage, among other things, of making it possible to maintain the distribution latch 14 in the cylinder head 10, in an articulated manner with respect to the valves 13 and to the camshaft 11, with lateral clearance on its two lateral faces, c that is to say its faces oriented in the axial direction around which it exerts its oscillating reciprocating tilting movement.
  • the lateral clearance between the latch 14 and its axial stops as defined here is necessary for mounting and to avoid mechanical friction and energy consumption. Such a clearance does not really affect the distribution law even if the presence of this clearance makes it possible to distribute the wear appreciably on the stem of the valve 13, since the slight displacement of the latch 14 within the limit of its clearance allows the point of contact not to remain always identical.
  • each hinge pin 15 can ensure the mounting of a distribution latch 14 which is angularly mounted around the hinge axis 15.
  • each hinge axis 15 may in particular comprise a single pivot shaft 151 ensuring the mounting with sliding pivot connection of the distribution latch 14.
  • the articulation axis 15 consists of a part, in particular of the monobloc type or in one piece, independent of the cylinder head 10 and fixed on a bearing face 102 delimited by the cylinder head 10.
  • the hinge pin 15 delimits, in particular in its lower part, a bearing face 152 coming into direct contact against the bearing face 102 of the cylinder head 10. This contact provides a support plane support for the hinge pin 15 relative to the cylinder head 10.
  • the arrangement comprises elements for fixing the hinge pin 15 to the cylinder head 10, which may comprise on the one hand at least one centering pin 16 (and on the other hand at least one fixing screw 17 (immobilizing the hinge pin 15 relative to the cylinder head 10 in the position defined by the mechanical cooperation between each centering pin 16 and the cylinder head 10, each centering pin 16 and each fixing screw 17 passing through through lights 153, 154, 156 formed through the hinge pin 15.
  • elements for fixing the hinge pin 15 to the cylinder head 10 may comprise on the one hand at least one centering pin 16 (and on the other hand at least one fixing screw 17 (immobilizing the hinge pin 15 relative to the cylinder head 10 in the position defined by the mechanical cooperation between each centering pin 16 and the cylinder head 10, each centering pin 16 and each fixing screw 17 passing through through lights 153, 154, 156 formed through the hinge pin 15.
  • the elements for fixing the hinge pin 15 on the cylinder head 10 comprise two centering pins 16, as is made visible on the figure 4 , making it possible to obtain precision in the positioning of the hinge pin 15 on the cylinder head 10.
  • the light 153 intended to be crossed by a centering pin 16 and the light 156 intended to be crossed by the fixing screw 17 may be of circular section.
  • the light 154 intended to be traversed by the other centering pin 16 may have an oblong-shaped section, the length of which is oriented in the direction of pivoting of the latches 14.
  • the articulation axis 15 is parallel to the camshaft 11.
  • the adjustment of the parallelism is possible via the fixing elements or any other dedicated member.
  • each distribution latch 14 comprises a zone in mechanical contact with the cam 111 and mechanically urging a stem of a valve 13 intended to be actuated in its translational movement by the oscillating movement of the dispensing latch 14.
  • the arrangement may also include an adjustment pad 18 interposed between the valve 13 and the dispensing latch 14.
  • the hinge pin 15, the centering pins 16 and the distribution lugs 14 will preferably be made of steel.
  • the articulation axis 15 can be heat treated to reduce its wear phenomenon at the level of the shafts 151 and possibly coated by a coating or a deposit, in particular a carbonaceous material obtained in the form of a thin layer, for example of the “DLC” type. "(For" Diamond Like Carbon "in Anglo-Saxon terminology).
  • the hinge pin 15 will preferably be configured so that it jointly holds at least one distribution latch, here the two distribution lugs 14, before being fixed to the cylinder head 10 by screwing via the fixing screw 17
  • the articulation axis 15 will be positioned as parallel as possible to the camshaft 11, via at least one centering pin 16 provided for this purpose.
  • the latches 14 After installing the valves 13 in the cylinder head 10, the latches 14 will be mounted on the articulation axis 15 by the shafts 151. Then, the assembly will be placed on the face 102 of the cylinder head 10, where the two pins of centering 16 and the fixing screw 17 will lock the hinge pin 15 relative to the cylinder head 10.
  • the distribution latches 14 will articulate around the respective shafts 151 and each will be locked axially in translation, on its shaft 151, by the wall 101 of the cylinder head 10 on the one hand and by a suitable element of the hinge axis 15 itself, avoiding any recourse to any other part external to this arrangement as defined here.
  • the above solution advantageously makes it possible to maintain two distribution lugs 14 with a single component part of the hinge pin 15 and a single screw 17. This results in a very advantageous saving of parts, allowing a saving of space, weight, manufacturing and assembly costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP15817986.1A 2014-12-29 2015-12-10 Linguets de distribution arrêtés axialement par l'axe d'articulation et par la culasse Active EP3240946B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1463377A FR3031137B1 (fr) 2014-12-29 2014-12-29 Linguets de distribution arretes axialement par l'axe d'articulation et par la culasse
PCT/FR2015/053408 WO2016108002A1 (fr) 2014-12-29 2015-12-10 Linguets de distribution arrêtés axialement par l'axe d'articulation et par la culasse

Publications (2)

Publication Number Publication Date
EP3240946A1 EP3240946A1 (fr) 2017-11-08
EP3240946B1 true EP3240946B1 (fr) 2020-02-05

Family

ID=52684509

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15817986.1A Active EP3240946B1 (fr) 2014-12-29 2015-12-10 Linguets de distribution arrêtés axialement par l'axe d'articulation et par la culasse
EP16785229.2A Active EP3356655B1 (fr) 2014-12-29 2016-09-27 Culasse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16785229.2A Active EP3356655B1 (fr) 2014-12-29 2016-09-27 Culasse

Country Status (7)

Country Link
EP (2) EP3240946B1 (zh)
JP (2) JP2018500503A (zh)
KR (2) KR20170102318A (zh)
CN (2) CN107208501B (zh)
FR (2) FR3031137B1 (zh)
RU (1) RU2698558C2 (zh)
WO (2) WO2016108002A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109307497B (zh) * 2018-10-30 2023-10-24 广西玉柴机器股份有限公司 一种发动机曲轴回转力矩及转轴圆度自动测量装置

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Also Published As

Publication number Publication date
WO2016108002A1 (fr) 2016-07-07
KR102294090B1 (ko) 2021-08-26
KR20170102318A (ko) 2017-09-08
FR3031137A1 (fr) 2016-07-01
EP3240946A1 (fr) 2017-11-08
EP3356655A1 (fr) 2018-08-08
CN108350766A (zh) 2018-07-31
RU2698558C2 (ru) 2019-08-28
JP2018500503A (ja) 2018-01-11
JP2018534461A (ja) 2018-11-22
FR3031137B1 (fr) 2016-12-23
RU2017127159A (ru) 2019-01-31
CN108350766B (zh) 2021-02-09
KR20180063231A (ko) 2018-06-11
WO2017055734A1 (fr) 2017-04-06
EP3356655B1 (fr) 2021-08-04
CN107208501B (zh) 2020-10-13
CN107208501A (zh) 2017-09-26
FR3031138A1 (fr) 2016-07-01
FR3031138B1 (fr) 2019-06-21
RU2017127159A3 (zh) 2019-07-17

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