EP3450706B1 - Dispositif de logement rotatif d'un arbre à cames - Google Patents

Dispositif de logement rotatif d'un arbre à cames Download PDF

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Publication number
EP3450706B1
EP3450706B1 EP18184901.9A EP18184901A EP3450706B1 EP 3450706 B1 EP3450706 B1 EP 3450706B1 EP 18184901 A EP18184901 A EP 18184901A EP 3450706 B1 EP3450706 B1 EP 3450706B1
Authority
EP
European Patent Office
Prior art keywords
bearing body
cylinder head
camshaft
bearing
fixing
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
EP18184901.9A
Other languages
German (de)
English (en)
Other versions
EP3450706A1 (fr
Inventor
Peter Bogdanski
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.)
MAN Truck and Bus SE
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Priority to EP21157914.9A priority Critical patent/EP3842622B1/fr
Publication of EP3450706A1 publication Critical patent/EP3450706A1/fr
Application granted granted Critical
Publication of EP3450706B1 publication Critical patent/EP3450706B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • 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
    • F01L1/181—Centre 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • 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
    • F02F2007/0063—Head bolts; Arrangements of cylinder head bolts

Definitions

  • the invention relates to a device for the rotatable mounting of a camshaft.
  • Camshafts are required in internal combustion engines to control the intake and exhaust valves and are attached to a cylinder head in the cylinder crankcase of the internal combustion engine, for example, via so-called bearing blocks.
  • the bearing blocks can also be attached to a mounting frame.
  • the bearing blocks support the camshaft so that it can rotate. In order to be able to achieve the smoothest possible mounting of the camshaft, it is necessary that the camshaft and the bearing blocks are aligned with respect to the cylinder head.
  • the DE 10 2011 081 483 A1 discloses a method for the simplified and precisely positional fixing of a camshaft module with a camshaft and bearing blocks on a cylinder head.
  • the bearing blocks are attached to the camshaft in the axial direction and aligned with respect to an angle.
  • the camshaft is aligned with the cylinder head using two alignment elements.
  • the individual bearing blocks are screwed tight to the cylinder head while turning the camshaft at the same time or in the meantime.
  • a cylinder head for an internal combustion engine is known. At least one bearing block with a bearing half for a camshaft and a bearing half for a rocker arm shaft for at least one rocker arm is provided on the cylinder head.
  • a first separate lubricant supply channel is provided in the cylinder head and a second separate lubricant supply channel is provided in the bearing block.
  • a first end of the second lubricant supply channel is in communication with the first lubricant supply channel.
  • a second end of the second lubricant supply channel ends openly in a bearing surface for the rocker arm shaft.
  • the WO 2008/061382 A1 discloses a camshaft assembly.
  • the camshaft assembly has at least two bearing blocks, each with a bearing receptacle in which a shaft section of a camshaft is rotatably arranged.
  • a flat contact surface is formed on each bearing block for supporting and fastening the bearing block to a bearing surface of a cylinder head.
  • Each bracket is attached to the cylinder head with two screws.
  • the EP 0 285 598 B1 discloses an injection internal combustion engine with cylinders arranged in rows, with two overhead camshafts and four valves and a central pump nozzle per cylinder.
  • Detachably attached rocker arms for driving the pump nozzles are provided above the associated camshaft on the cylinder head.
  • the cam for the rocker arms to actuate the pump nozzles is driven alternately for one cylinder from the one camshaft and for the adjacent cylinder from the second camshaft, each rocker arm being fastened individually.
  • the detachable individual attachment of the rocker arms is carried out on the bearing blocks attached to the cylinder head by screws, the screws also serving to anchor bearing parts for the camshafts.
  • the DE 10 2007 025 129 A1 discloses a cylinder head cover for covering a cylinder crankcase of an internal combustion engine. At least one upper bearing part for a camshaft has at least one through opening which is aligned on the one hand with a screw-in / through opening in a lower bearing part and / or a screw-in opening in the cylinder crankcase and on the other hand with a through opening in the cylinder head cover.
  • the cylinder head cover and the upper bearing part can be fastened to the cylinder crankcase using a common fastening screw.
  • the EP 1 936 130 A2 discloses a bearing device for two camshafts.
  • a bearing body for both camshafts can be attached to a cylinder head by means of a bolt.
  • the WO 2010/086517 A1 discloses a method for positioning two mechanical foundry or forged parts with respect to one another and an assembly manufactured according to such a method.
  • the CN 102 061 952 A discloses a camshaft bearing seat comprising a bearing seat body which is disposed on the upper part of a cylinder cover of a vehicle engine and is provided with a mounting hole for mounting a camshaft; includes.
  • An eccentric shaft hole for fixing an eccentric shaft is arranged on one side of the fixing hole. The axes of the mounting hole and the eccentric shaft hole are parallel.
  • the bearing seat body is provided with a connecting hole for attaching the bearing seat body.
  • the WO 2012/055150 A1 relates to a cylinder head lubrication structure comprising a cylinder head body, a front camshaft bearing cap, a middle camshaft bearing cap and a rear camshaft bearing cap and a camshaft bushing provided therein.
  • Each bearing cap has a rocker arm shaft mounted on the bearing caps.
  • the invention is based on the object of providing an alternative or improved device for the rotatable mounting of a camshaft.
  • a simple and space-optimized structure is to be implemented.
  • the device is provided for the rotatable mounting of a camshaft of an internal combustion engine.
  • the device has a first bearing body with a receptacle for the rotatable mounting of the camshaft.
  • the device has a cylinder head or a fastening frame for fastening the first bearing body.
  • the device has a first fastening means (for example a first fastening screw) which fastens the first bearing body to the cylinder head or fastening frame.
  • the first fastening means is the only fastening means that fasten (fixes, fixes) the first bearing body to the cylinder head or fastening frame.
  • the device offers the advantage that a more space-saving design of the first bearing body is made possible.
  • the first bearing body only has to provide enough material on one side next to the camshaft receptacle to accommodate the fastening means.
  • the first bearing body can be designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle.
  • the manufacturing costs can be reduced, since fewer fasteners are required, fewer receptacles for fasteners (for example screw holes) have to be produced and the assembly time is reduced.
  • the first bearing body can be attached either to a cylinder head or to a mounting frame.
  • the cylinder head or fastening frame can also be designed more freely.
  • the first bearing body can have a first side area in which the first fastening means is received, and a second side area opposite the first side area with respect to the receptacle for the camshaft.
  • the cylinder head can have a flow channel which extends in a region of the cylinder head which is arranged next to (for example adjacent to) the second side region (for example below the second side region with respect to a vertical axis) of the first bearing body.
  • the flow channel can preferably have a shape (design) free of casting protrusions in this area. This is made possible by the fact that no casting slug (casting projection) is required to accommodate a blind hole for a further fastening means. The provision of only a single fastening means can thus contribute to a flow-optimized design of a flow channel in the cylinder head.
  • the receptacle for the camshaft can preferably be a cylindrical through hole or a recess in the form of a half cylinder.
  • the fastening frame when using a fastening frame for fastening the first bearing body, can be fastened (fixed, fixed) to a cylinder head.
  • the camshaft can be arranged as an overhead camshaft.
  • the camshaft is pressed down during operation. This means that the camshaft does not tend to lift, which means that the use of a single fastening means can be sufficient.
  • the first fastening means is a first fastening screw.
  • the first fastening screw can be the only fastening screw that attaches the first bearing body to the cylinder head or fastening frame.
  • the first bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the through hole.
  • the first fastening means fasten the first bearing body to the cylinder head or fastening frame in a non-positive and positive manner.
  • the first fastening means can preferably be a releasable fastening means.
  • the first fastening means can be the only (for example detachable) fastening means of the device.
  • the first bearing body forms a one-piece bearing block for mounting the camshaft.
  • the device has a second bearing body with a receptacle (for example as a recess in the form of a half cylinder) for bearing the camshaft.
  • the first bearing body and the second bearing body together form a two-part bearing block.
  • the receptacle (for example as a recess in the form of a half cylinder) of the first bearing body and the receptacle (for example as a recess in the form of a half cylinder) of the second bearing body form a common receptacle for the camshaft.
  • the present disclosure can therefore not only be used for one-piece bearing blocks, but also for two-part bearing blocks. Consequently, the present disclosure can be used not only with assembled camshafts, but also with forged camshafts, where threading of the bearing blocks is not possible.
  • the second bearing body can preferably have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the Extends through hole.
  • the through hole of the first bearing body and the through hole of the second bearing body can be aligned with one another.
  • first bearing body and the second bearing body are fastened to one another, preferably in a non-positive and positive manner, via a second fastening means, in particular a second fastening screw.
  • first fastening means and the second fastening means can be provided on opposite sides of the first bearing body with respect to the receptacle for the camshaft.
  • the second fastening means can preferably be a releasable fastening means.
  • first fastening means and the second fastening means are the only fastening means of the device.
  • first fastening means additionally fasten the second bearing body to the cylinder head or fastening frame. It is also possible for the first fastening means to be the only fastening means that fasten the second bearing body to the first bearing body.
  • the device also has at least one positioning element which is arranged between the first bearing body and the second bearing body for positioning the first bearing body relative to the second bearing body. It can thus be ensured in particular that the camshaft receptacles of the bearing bodies are aligned with one another.
  • the positioning elements can position the first bearing body relative to the second bearing body in a plane perpendicular to the longitudinal axis of the first fastening means.
  • the device can have no positioning element for positioning the first or second bearing body relative to the cylinder head or mounting frame. The costs for the positioning elements can thus be saved.
  • the at least one positioning element arranged between the first bearing body and the second bearing body comprises a positioning pin, a fitting sleeve surrounding the first fastening means and / or a fitting sleeve surrounding the second fastening means.
  • the use of fitting sleeves can be a allow small dimensions of the bearing body, since no additional material areas are required for the provision of holes for positioning pins.
  • the device also has at least one positioning element which is arranged between the first or second bearing body and the cylinder head or the fastening frame for positioning the first or second bearing body relative to the cylinder head or fastening frame. Alignment of the corresponding bearing body relative to the cylinder head or mounting frame can thus be improved.
  • the positioning elements can position the first or second bearing body relative to the cylinder head or fastening frame in a plane perpendicular to the longitudinal axis of the first fastening means.
  • the at least one positioning element arranged between the first or second bearing body and the cylinder head or the fastening frame comprises a positioning pin and / or a fitting sleeve which surrounds the first fastening means.
  • the use of a fitting sleeve can enable the bearing body to be dimensioned small, since no additional material areas are required for the provision of bores for positioning pins.
  • camshaft is mounted in several devices, spaced apart in the longitudinal direction of the camshaft, for the rotatable mounting of the camshaft.
  • the device of the invention has a rocker arm shaft for rotatably supporting a rocker arm.
  • the first fastening means additionally fasten the rocker arm axis to the cylinder head or fastening frame, and in particular also to the first and / or second bearing body.
  • a further additional fastening means for fastening the rocker arm shaft can thus be saved. As a result, the assembly time can also be reduced.
  • the first bearing body has a receptacle for the rocker arm axis, which is preferably arranged on a side of the first bearing body opposite the cylinder head or fastening frame.
  • a longitudinal lubricating fluid channel of the rocker arm axis is in fluid connection with the receptacle for the camshaft of the first bearing body, preferably via a branch channel of the first bearing body and a branch channel of the rocker arm axis. In this way, a lubricating fluid can flow via the rocker arm axis to a plain bearing of the camshaft.
  • the fastening frame or the cylinder head has a hole, in particular a blind hole or a through hole, with a thread for non-positive and positive fastening of the first bearing body to the fastening frame or cylinder head by means of the first fastening means.
  • the first fastening means can thus be screwed directly into the blind hole, in particular in the form of a fastening screw for fastening the first bearing body (and optionally the second bearing body).
  • the first bearing body is designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle for the camshaft. This is made possible in particular by the provision of a single fastening means (the first fastening means) for fastening to the cylinder head or fastening frame.
  • the first fastening means can generate a tilting moment for supporting the first bearing body on a support surface of the cylinder head or fastening frame.
  • the invention also relates to a motor vehicle, in particular a utility vehicle, with a device as disclosed herein.
  • the utility vehicle can be, for example, a truck or a bus.
  • the Figure 1 shows a device 10 for rotatably mounting a camshaft 12.
  • the device 10 has a bearing body 14, a cylinder head 16, a fastening screw 18 and a rocker arm shaft 20.
  • the device 10 can be used for supporting the camshaft 12 in any internal combustion engine.
  • the internal combustion engine can for example be included in a motor vehicle, in particular a utility vehicle.
  • the utility vehicle can be, for example, a truck or a bus.
  • the bearing body 14 is designed as a one-piece bearing block.
  • the bearing body 14 has a receptacle 22 for the camshaft 12.
  • the camshaft 12 can be rotatably mounted in the receptacle 22 via a slide bearing.
  • the receptacle 22 is a cylindrical through hole of the bearing body 14.
  • the camshaft 12 is a built-up camshaft. A cylindrical section of the camshaft 12 is pushed into the receptacle 22 in the dismantled state of the camshaft 12. The camshaft 12 is then assembled.
  • a plurality of bearing bodies 14 are provided along a longitudinal axis of the camshaft 12.
  • the camshaft 12 is arranged as an overhead camshaft (OHC).
  • the bearing body 14 is fastened (fixed) to the cylinder head 16 via the fastening screw 18.
  • the fastening screw 18 extends through a through hole 24 of the bearing body 14.
  • the fastening screw 18 is screwed into a thread of a blind hole 26 of the cylinder head 16.
  • the blind hole 26 extends into a casting slug (casting projection) 27, which is shaped in particular to provide the blind hole 26 or a through hole.
  • fastening screw 18 is the only fastening screw that attaches the bearing body 14 to the cylinder head 16.
  • Conventional bearing blocks mostly use two or four fastening screws to fasten the bearing body to the cylinder head.
  • the fastening screw 18 is sufficient as the only fastening screw for the bearing body 14.
  • the camshaft 12 is pushed downward by the cam follower of the rocker arm during operation.
  • the weight of the camshaft 12 also acts downwards.
  • the camshaft 12 thus shows no tendency to lift off the cylinder head 16 together with the bearing body 14.
  • the screw force of the fastening screw 18 and a one-sided material area next to the fastening screw 18 (left in Figure 1 ) a tilting moment is generated on a bearing surface 29 to the cylinder head 16, which holds the first bearing body 14 securely on the cylinder head 16.
  • the bearing body 14 only has to have a material area on one side for receiving the fastening screw 18.
  • the bearing body 14 can end directly with a wall area delimiting the receptacle 22.
  • the bearing body 14 can thus be better adapted to the available installation space.
  • the bearing body 14 can be configured asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle 22 of the bearing body 14.
  • the cylinder head 16 does not have to have any casting slugs (no casting projection) for providing a blind hole for screwing in a fastening screw, in particular in area A.
  • the area A can, for example, be shaped in a flow-optimized manner for a fluid channel 28 in the cylinder head 16.
  • the number of parts of the device can also be reduced due to the reduction in the number of fastening screws.
  • the production time and the assembly time are reduced, since fewer screw holes have to be made and fewer fastening screws have to be installed.
  • the present disclosure is not limited to the fastening screw 18 attaching the bearing body 14 to the cylinder head 16 attached.
  • the fastening screw 18 could fasten the bearing body 14 to a fastening frame 30.
  • the fastening frame 30 could then in turn be fastened to a cylinder head.
  • the in Figure 1 The component shown below the bearing body 14 could alternatively be an area of a fastening frame 30 instead of an area of a cylinder head 16.
  • fastening screw 18 As an alternative to the fastening screw 18, another fastening means could also be used for the force-fitting and form-fitting fastening of the bearing body 14 to the cylinder head 16.
  • the rocker arm shaft 20 is used for the rotatable mounting of a rocker arm (not shown).
  • the rocker arm is operatively connected via a cam follower between the camshaft 12 and one or more gas exchange valves (not shown) for actuating the gas exchange valves.
  • the fastening screw 18 also attaches the rocker arm shaft 20 to the cylinder head 16 (fastening frame 30).
  • the fastening screw 18 extends through a through hole 32 of the rocker arm axis 20.
  • the holes 32, 24 and 26 are aligned with one another along a longitudinal axis of the fastening screw 18.
  • a screw head 18A rests on a contact surface 20A of the rocker arm axis 20.
  • the rocker arm axis 20 is mounted in a receptacle 21 of the bearing body 14. The additional fastening of the rocker arm shaft 20 via the fastening screw 18 is optional.
  • a lubricating fluid can be supplied to the rocker arm shaft 20 via a longitudinal channel 34.
  • a branch channel 36 of the rocker arm shaft 20 opens into a branch channel 38 of the bearing body 14.
  • the branch channel 38 in turn opens into the receptacle 22.
  • additional positioning elements 40, 42 can optionally be used.
  • the positioning elements 40, 42 position the bearing body 14 relative to the cylinder head 16 in a plane perpendicular to the longitudinal axis of the fastening screw 18.
  • the positioning element 40 is designed as a fitting sleeve.
  • the positioning element 40 is provided in a form-fitting manner in a recess 44 of the bearing body 14 and a recess 46 of the cylinder head 16 (fastening frame 30).
  • the positioning element 40 is around the fastening screw 18 arranged around, preferably without touching the fastening screw 18.
  • the positioning element 42 is designed as a positioning pin.
  • the positioning element 42 is positively provided in a recess 48 of the bearing body 14 and a recess 50 of the cylinder head 16 (fastening frame 30).
  • the positioning elements can, for example, also be designed as fitting sleeves.
  • the Figure 2 shows a further embodiment of a device 110 for rotatably mounting the camshaft 12.
  • the device 110 is characterized in particular by the fact that it is also suitable for the rotatable mounting of forged camshafts, since threading the bearing blocks is not possible here.
  • the device 110 has a first bearing body 14A and a second bearing body 14B.
  • the first bearing body 14A and the second bearing body 14B form a two-part bearing block.
  • the first bearing body 14A has a first receptacle 22A and the second bearing body 14B has a second receptacle 22B.
  • the receptacles 22A, 22B form a common receptacle in cylinder shape for the camshaft 12.
  • the fastening screw 18 is the only fastening screw that fastens (fixes) the bearing bodies 14A, 14B on the cylinder head 16 (fastening frame 30).
  • the fastening screw 18 extends through a through hole 24A of the first bearing body 14A and a through hole 24B of the second bearing body 14B.
  • a second fastening screw 52 can be provided which fastens the first bearing body 14A to the second bearing body 14B.
  • the mounting screws 18 and 52 may be positioned on opposite sides of the camshaft 12.
  • the fastening screw 52 extends through a through hole 58 in the first bearing body 14A.
  • the fastening screw 52 is screwed into a thread of a blind hole 60 of the second bearing body 14B.
  • Positioning elements 54 and 56 are provided for positioning the bearing bodies 14A and 14B with respect to one another.
  • the positioning elements 54, 56 position the first bearing body 14A relative to the second bearing body 14B in a plane perpendicular to the longitudinal axis of the fastening screw 18.
  • the positioning elements 54, 56 are designed as dowel sleeves, but can also be designed, for example, as dowel pins.
  • the positioning elements 54, 56 connect the first bearing body 14A to the second bearing body 14B in a form-fitting manner.
  • the positioning element 54 is arranged around the fastening screw 18, preferably without touching the fastening screw 18.
  • the positioning element 56 is arranged around the fastening screw 52, preferably without touching the fastening screw 52.
  • the device 110 of Figure 2 is an embodiment in which no positioning elements for positioning the first and second bearing bodies 14A, 14B relative to the cylinder head 16 (mounting frame 30) are provided. In further developments of this exemplary embodiment, positioning elements could be provided between the second bearing body 14B and the cylinder head 16 (fastening frame 30).

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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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (14)

  1. Dispositif (10 ; 110) pour le support rotatif d'un arbre à cames (12) d'un moteur à combustion interne, présentant :
    un premier corps de palier (14 ; 14A) comprenant un logement (22 ; 22A) pour le support rotatif de l'arbre à cames (12) ;
    une culasse (16) ou un cadre de fixation (30) pour la fixation du premier corps de palier (14 ; 14A) ; et
    un premier moyen de fixation (18) qui fixe le premier corps de palier (14 ; 14A) à la culasse (16) ou au cadre de fixation (30), le premier moyen de fixation (18) étant le seul moyen de fixation (18) qui fixe le premier corps de palier (14 ; 14A) à la culasse (16) ou au cadre de fixation (30),
    caractérisé par :
    un axe de culbuteur (20) pour le support rotatif d'un culbuteur, le premier moyen de fixation (18) fixant en outre l'axe de culbuteur (20) à la culasse (16) ou au cadre de fixation (30).
  2. Dispositif (10 ; 110) selon la revendication 1, dans lequel :
    le premier moyen de fixation (18) est une vis de fixation ; et/ou
    le premier moyen de fixation (18) fixe le premier corps de palier (14 ; 14A) par engagement par force et/ou par correspondance géométrique à la culasse (16) ou au cadre de fixation (30) ; et/ou le premier moyen de fixation (18) est un moyen de fixation amovible.
  3. Dispositif (10) selon la revendication 1 ou la revendication 2, dans lequel le premier corps de palier (14) forme un bloc palier d'une seule pièce pour le support de l'arbre à cames (12).
  4. Dispositif (110) selon la revendication 1 ou la revendication 2, présentant en outre un deuxième corps de palier (14B) avec un logement (22B) pour le support de l'arbre à cames (12), dans lequel :
    le premier corps de palier (14A) et le deuxième corps de palier (14B) forment ensemble un bloc palier en deux parties ; et
    le logement (22A) du premier corps de palier (14A) et le logement (22B) du deuxième corps de palier (14B) forment un logement commun pour l'arbre à cames (12).
  5. Dispositif (110) selon la revendication 4, dans lequel :
    le premier corps de palier (14A) et le deuxième corps de palier (14B) sont fixés l'un à l'autre, de préférence par engagement par force et par correspondance géométrique, par le biais d'un deuxième moyen de fixation (52), en particulier une deuxième vis de fixation.
  6. Dispositif (110) selon la revendication 4 ou la revendication 5, dans lequel :
    le premier moyen de fixation (18) fixe en outre le deuxième corps de palier (14B) à la culasse (16) ou au cadre de fixation (30).
  7. Dispositif (110) selon l'une quelconque des revendications 4 à 6, présentant en outre au moins un élément de positionnement (54, 56) qui est disposé entre le premier corps de palier (14A) et le deuxième corps de palier (14B) pour le positionnement du premier corps de palier (14A) par rapport au deuxième corps de palier (14B).
  8. Dispositif (110) selon la revendication 7, dans lequel l'au moins un élément de positionnement (54, 56) disposé entre le premier corps de palier (14A) et le deuxième corps de palier (14B) comprend une goupille de positionnement, une douille d'ajustement entourant le premier moyen de fixation (18) et/ou une douille d'ajustement entourant le deuxième moyen de fixation (52).
  9. Dispositif (10) selon l'une quelconque des revendications 4 à 8, dans lequel :
    le dispositif (10) présente en outre au moins un élément de positionnement (40, 42) qui est disposé entre le premier corps de palier (14) ou le deuxième corps de palier (14B) d'une part et la culasse (16) ou le cadre de fixation (30) d'autre part, pour le positionnement du premier ou du deuxième corps de palier (14, 14B) par rapport à la culasse (16) ou au cadre de fixation (30) ; ou
    le dispositif (10) ne présente pas d'élément de positionnement pour le positionnement du premier ou du deuxième corps de palier (14 ; 14B) par rapport à la culasse (16) ou au cadre de fixation (30) .
  10. Dispositif (10) selon la revendication 9, dans lequel l'au moins un élément de positionnement (40, 42) disposé entre le premier ou le deuxième corps de palier (14 ; 14B) et la culasse (16) ou le cadre de fixation (30) comprend une goupille de positionnement et/ou une douille d'ajustement qui entoure le premier moyen de fixation (18).
  11. Dispositif (10 ; 110) selon l'une quelconque des revendications précédentes, dans lequel :
    le premier corps de palier (14 ; 14A) présente un logement pour l'axe de culbuteur (20) qui est disposé de préférence au niveau d'un côté du premier corps de palier (14 ; 14A) opposé à la culasse (16) ou au cadre de fixation (30) ; et/ou un canal longitudinal de fluide de lubrification (34) de l'axe de culbuteur (20) est en liaison fluidique avec le logement (22 ; 22A) pour l'arbre à cames (12) du premier corps de palier (14 ; 14A), de préférence par le biais d'un canal de branchement (38) du premier corps de palier (14 ; 14A) et d'un canal de branchement (36) de l'axe de culbuteur (20).
  12. Dispositif (10 ; 110) selon l'une quelconque des revendications précédentes, dans lequel le cadre de fixation (30) ou la culasse (16) présente un trou (26), en particulier un trou borgne ou un trou traversant, avec un filetage pour la fixation par engagement par force et par correspondance géométrique du premier corps de palier (14 ; 14A) au cadre de fixation (30) ou à la culasse (16) au moyen du premier moyen de fixation (18).
  13. Dispositif (10 ; 110) selon l'une quelconque des revendications précédentes, dans lequel :
    le premier corps de palier (14 ; 14A) est réalisé de manière asymétrique par rapport à un plan vertical passant par un axe médian longitudinal du logement (22 ; 22A) pour l'arbre à cames (12) ; et/ou
    le premier moyen de fixation (18) génère un couple de basculement pour supporter le premier corps de palier (14 ; 14A) sur une surface d'appui (29) de la culasse (16) ou du cadre de fixation (30).
  14. Véhicule automobile, en particulier véhicule utilitaire, comprenant un dispositif (10 ; 110) selon l'une quelconque des revendications précédentes.
EP18184901.9A 2017-08-18 2018-07-23 Dispositif de logement rotatif d'un arbre à cames Active EP3450706B1 (fr)

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DE102017118862.2A DE102017118862A1 (de) 2017-08-18 2017-08-18 Vorrichtung zum drehbaren Lagern einer Nockenwelle

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CN (2) CN109404082B (fr)
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EP3842622B1 (fr) 2024-04-03
EP3450706A1 (fr) 2019-03-06
RU2018129776A (ru) 2020-02-17
JP2019035410A (ja) 2019-03-07
CN109404082A (zh) 2019-03-01
US20190055897A1 (en) 2019-02-21
EP3842622A1 (fr) 2021-06-30
DE102017118862A1 (de) 2019-02-21
BR102018016619A2 (pt) 2019-07-16
BR102018016619A8 (pt) 2023-02-14
CN109404082B (zh) 2022-05-03
BR102018016619B1 (pt) 2023-10-03
CN114856745A (zh) 2022-08-05
RU2018129776A3 (fr) 2021-12-27
JP7248391B2 (ja) 2023-03-29

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