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

• Dispense valves stopped axially by the hinge pin and the cylinder head
• the invention relates to an arrangement for a motor vehicle, comprising a cylinder head of a heat engine, a camshaft rotating relative to the cylinder head, at least one hinge pin fixed on the cylinder head and offset with respect to the axis. rotation of the camshaft.
• 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 that overcomes the disadvantages listed above.
• an object of the invention is to provide such an arrangement that is both simple design and implementation, inexpensive, reliable, and easy to integrate in situations of reduced size 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 rotating relative to the cylinder head, at least one hinge pin fixed on the cylinder head and offset relative to the axis of rotation of the cam shaft, and at least one distribution latch for controlling the intake and exhaust valves of the engine, mounted on the hinge pin and actuated according to an oscillating tilting movement about the hinge axis by a rotary cam of the camshaft, in which the axial stops of the distribution latch along the hinge axis are constituted by a blocking wall axial delimited by the cylinder head on the one hand and the axis of articulation on the other hand.
• the hinge pin On the opposite side to said axial locking wall with respect to the distribution pawl, the hinge pin can form a shoulder delimiting an axial locking face, said axial locking face and said locking wall forming axial stops in the directions opposite for the distribution latch.
• Each hinge axis can ensure the mounting of two angularly free distribution latches relative to each other about the hinge axis.
• Each hinge axis may comprise two pivot shafts aligned with each other and each ensuring the sliding pivot connection mounting of a corresponding distribution latch.
• An axial clearance may be present between the distribution latch and the swingarm hinge pin on the one hand, and the axial locking wall on the other hand, between 0.05 mm and 0.2 mm.
• the hinge axis is preferably constituted by a part, in particular of monobloc type or in one piece, independent of the yoke and fixed on a bearing face delimited by the yoke.
• the fastening elements of the hinge pin on the yoke comprise on the one hand at least one centering pin and secondly at least one fixing screw immobilizing the hinge axis of oscillation 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 fastening screw passing through through holes formed through the swingarm articulation axis.
• the hinge axis may be parallel to the cam shaft.
• each distribution latch may comprise an area in mechanical contact with the cam and mechanically biasing a tail of a valve intended to be actuated in its translational movement by the movement oscillating distribution latch.
• the arrangement comprises a setting pad interposed between the valve and the dispensing latch.
• a motor vehicle may include at least one such arrangement.
• FIG. 1, already described, is a perspective view of an example of a known arrangement of the prior art
• FIG. 2 is a sectional view along a sectional plane A-A of an exemplary arrangement according to the invention
• FIG. 3 is a sectional view along a sectional plane B-B visible in FIG. 2, of the exemplary arrangement shown in FIG. 2,
• FIG. 4 is a sectional view along a sectional plane C-C visible in FIG. 2, of the exemplary arrangement illustrated in FIGS. 2 and 3,
• FIG. 5 is a sectional view along a plane of section D-D visible in FIG. 3, of the exemplary arrangement shown in FIGS. 2 to 4, and
• FIG. 6 is a perspective view of an exemplary hinge pin as used in the arrangement of FIGS. 2 to 5.
• a motor vehicle comprising a cylinder head 10 of a heat engine, a cam shaft 1 1 in rotation relative to the cylinder head 10, at least one hinge axis 15 fixed on the yoke 10 and offset relative to the axis of rotation of the cam shaft January 1.
• the cylinder head 10 may optionally be equipped with a cylinder head cover 12 attached to an upper face of the monobloc remainder of the cylinder head 10.
• the fixing of the camshaft 1 1 on the cylinder head 10 can in particular be done in the lower part by this breech 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 for controlling the intake and exhaust valves 13 of the heat engine, mounted on the hinge pin 15 and actuated in an oscillating motion tilting around the hinge axis 15 by a rotary cam 1 1 1 of the cam shaft 1 January.
• the axial stops of the distribution latch 14 along the axis of articulation 15 are constituted by an axial locking wall 101 delimited by the yoke 10 on the one hand, and by the hinge pin 15 on the other hand , especially at an appropriate element of the articulation axis 15.
• the term “distribution latch” can equally well be replaced by the term “swingarm”, since such a swingarm is configured so that it can perform the aforementioned function vis-à-vis of the valve 13 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 arranged and thus maintained axially between them.
• Each hinge pin 15 preferably provides for the mounting of two angularly free distribution tongues 14 relative to one another about the hinge axis 15.
• each hinge pin 15 can in particular comprise two pivot shafts 151 aligned with each other in the axial direction and each ensuring the sliding pivot connection assembly of a corresponding distribution latch 14.
• Each pivot shaft 151 delimits at its distal end an axial face 155 intended to come opposite a corresponding axial locking wall 101.
• a mounting clearance may 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 defined by the yoke 10 and spaced apart by a distance greater than the distance separating the two axial faces 155 that comprises the hinge pin 15 between them. The difference between these two distances defines the editing games 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.
• the adjustment between the articulation axis 15 and the pawl 14 is preferably sliding axial type, such as a standardized adjustment type H7g6.
• each hinge pin 15 can ensure the mounting of a distribution latch 14 which is mounted angularly free around the axis of articulation 15.
• each hinge axis 15 may include in particular a single pivot shaft 151 ensuring the sliding pivot connection assembly of the distribution latch 14.
• the hinge pin 15 is constituted by a part, in particular of monobloc or integral type, independent of the yoke 10 and fixed on a bearing surface 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 surface 102 of the 10. This contact provides a plane-support connection for the hinge pin 15 with respect to the yoke 10.
• the arrangement comprises fastening elements of the hinge pin 15 on the yoke 10.
• each centering pin 16 which can comprise on the one hand at least one centering pin 16 (and secondly at least one fixing screw 17 (immobilizing the axis of articulation 15 with respect 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-holes 153, 154, 156 formed through the hinge axis 15.
• the fastening elements of the hinge pin 15 on the yoke 10 comprise two centering pins 16, as made visible in FIG. 4, making it possible to obtain a precision in the positioning of the hinge pin 15 on the cylinder head 10.
• the light 153 to be traversed by a centering pin 16 and the slot 156 to be traversed by the fastening screw 17 may be of circular section.
• By against the light 154 to be traversed by the other centering pin 16 may have a section of oblong shape, whose length is oriented in the direction of pivoting latches 14.
• the hinge pin 15 is parallel to the cam shaft 11. Adjustment of the parallelism is possible via the fixing elements or any other dedicated organ.
• each distribution latch 14 comprises a zone in mechanical contact with the cam 1 1 1 and mechanically biasing a tail 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 comprise a setting pad 18 interposed between the valve 13 and the distribution latch 14.
• the hinge axis 15, the centering pins 16 and the distribution latches 14 will preferably be made of steel.
• the hinge pin 15 may be heat-treated to reduce its wear phenomenon at the level of the shafts 151 and possibly coated with 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 English terminology).
• the assembly of the previously detailed arrangement can be carried out as follows.
• the hinge axis 15 will preferably be configured so that it jointly maintains at least one distribution latch, here the two distribution latches 14, before being fixed on the yoke 10 by screwing via the fastening screw 17
• the hinge axis 15 will be positioned as parallel as possible to the cam shaft 11, via at least one centering pin 16 provided for this purpose.
• the latches 14 will be mounted on the hinge pin 15 by the shafts 151. Then, the assembly will be placed on the face 102 of the yoke 10, where the two centering pins 16 and the fixing screw 17 will lock the hinge pin 15 relative to the yoke 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 yoke 10 on the one hand and by an appropriate element of the hinge pin 15 itself, avoiding any recourse to any other external part to this arrangement as defined herein.
• the preceding solution advantageously makes it possible to maintain two distribution latches 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, cost of manufacture and assembly.
• the solution just described has the advantage of being both simple design and implementation, inexpensive, reliable, and easy to integrate in situations of reduced size at the breech.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Valve-Gear Or Valve Arrangements (AREA)
• Valve Device For Special Equipments (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications After (1)

Country Status (7)

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Citations (10)

Family Cites Families (25)

• 2014
  • 2014-12-29 FR FR1463377A patent/FR3031137B1/fr not_active Expired - Fee Related
• 2015
  • 2015-09-30 FR FR1559268A patent/FR3031138B1/fr not_active Expired - Fee Related
  • 2015-12-10 CN CN201580074184.9A patent/CN107208501B/zh active Active
  • 2015-12-10 RU RU2017127159A patent/RU2698558C2/ru active
  • 2015-12-10 JP JP2017534647A patent/JP2018500503A/ja active Pending
  • 2015-12-10 WO PCT/FR2015/053408 patent/WO2016108002A1/fr active Application Filing
  • 2015-12-10 EP EP15817986.1A patent/EP3240946B1/fr active Active
  • 2015-12-10 KR KR1020177021385A patent/KR20170102318A/ko active IP Right Grant
• 2016
  • 2016-09-27 CN CN201680062764.0A patent/CN108350766B/zh active Active
  • 2016-09-27 KR KR1020187012417A patent/KR102294090B1/ko active IP Right Grant
  • 2016-09-27 WO PCT/FR2016/052452 patent/WO2017055734A1/fr active Application Filing
  • 2016-09-27 EP EP16785229.2A patent/EP3356655B1/fr active Active
  • 2016-09-27 JP JP2018516195A patent/JP2018534461A/ja active Pending

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