EP3842622B1 - 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
EP3842622B1
EP3842622B1 EP21157914.9A EP21157914A EP3842622B1 EP 3842622 B1 EP3842622 B1 EP 3842622B1 EP 21157914 A EP21157914 A EP 21157914A EP 3842622 B1 EP3842622 B1 EP 3842622B1
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
EP21157914.9A
Other languages
German (de)
English (en)
Other versions
EP3842622A1 (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
Publication of EP3842622A1 publication Critical patent/EP3842622A1/fr
Application granted granted Critical
Publication of EP3842622B1 publication Critical patent/EP3842622B1/fr
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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 rotatably supporting a camshaft.
  • Camshafts are required in combustion engines to control the intake and exhaust valves and are attached to a cylinder head in the cylinder crankcase of the combustion engine using 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 achieve the smoothest possible bearing 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 precise positioning of a camshaft module with a camshaft and bearing blocks on a cylinder head.
  • the bearing blocks are attached to the camshaft in an axial direction and angularly aligned.
  • the camshaft is aligned with the cylinder head using two alignment elements.
  • the individual bearing blocks are screwed to the cylinder head while simultaneously or temporarily turning the camshaft.
  • 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 axle 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 connected to the first lubricant supply channel.
  • a second end of the second lubricant supply channel ends openly in a bearing surface for the rocker arm axle.
  • 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 support surface of a cylinder head.
  • Each bearing block is fastened 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 as well as four valves and a central pump nozzle per cylinder. Above the associated camshaft on the cylinder head, detachably attached rocker arms are provided for driving the pump nozzles.
  • the cam for the rocker arms for actuating the pump nozzles is driven alternately for one cylinder from one camshaft and for the adjacent cylinder from the second camshaft, with each rocker arm being attached individually.
  • the detachable individual attachment of the rocker arms takes place on the bearing blocks attached to the cylinder head by screws, with 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. It is possible to attach the cylinder head cover and the upper bearing part 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 using a bolt.
  • the WO 2010/086517 A1 discloses a method for positioning two mechanical foundry or forged parts relative to each other and an assembly manufactured according to such a method.
  • the WO 2012/055150 A1 refers to a cylinder head lubricating structure having 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 US 5522354 A discloses a device for rotatably supporting a camshaft, wherein a lower bearing body is part of a support structure, and an upper bearing body, and this, together with an upper bearing body, is connected to the cylinder head with a fastening means.
  • the invention is based on the object of providing an alternative or improved device for rotatably supporting a camshaft.
  • a simple and space-optimized structure should be realized.
  • the device is intended for rotatably supporting a camshaft of an internal combustion engine.
  • the device has a first bearing body with a receptacle for rotatably supporting 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 fastener is the only fastener that attaches (fixes, fixes) the first bearing body to the cylinder head or mounting frame.
  • the device offers the advantage that a more space-saving design of the first bearing body is possible.
  • the first bearing body only needs to provide enough material on one side next to the camshaft holder to accommodate the fastener.
  • the first bearing body can be designed asymmetrically with respect to a vertical plane through a central longitudinal axis of the receptacle. Additionally, manufacturing costs can be reduced because fewer fasteners are required, fewer fastener receptacles (e.g. screw holes) need to be made, and 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 region in which the first fastening means is accommodated, and a second side region opposite the first side region with respect to the receptacle for the camshaft.
  • the cylinder head can have a flow channel that extends in a region of the cylinder head that 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 projections in this region. 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 is necessary. The provision of only one fastening means can therefore contribute to a flow-optimized design of a flow channel in the cylinder head.
  • the receptacle for the camshaft can be a cylindrical through hole or a recess in the form of a half cylinder.
  • the fastening frame can preferably be fastened (fixed, fixed) to a cylinder head.
  • the camshaft can be arranged as an overhead camshaft.
  • the camshaft is pressed downwards during operation. This means that the camshaft does not tend to lift, meaning that using a single fastener may be sufficient.
  • the first fastening means is a first fastening screw.
  • the first fastening screw can be the only fastening screw that fastens the first bearing body to the cylinder head or fastening frame.
  • the first bearing body can 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 fastens the first bearing body to the cylinder head or fastening frame in a force-fitting and positive manner.
  • the first fastening means can be a releasable fastening means.
  • the first fastening means can be the only (for example releasable) fastening means of the device.
  • the first bearing body forms a one-piece bearing block for supporting 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 supporting the camshaft.
  • a receptacle for example as a recess in the form of a half cylinder
  • 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 shape of half a cylinder) of the first bearing body and the receptacle (for example as a recess in the shape of half a cylinder) of the second bearing body form a common receptacle for the camshaft.
  • the present disclosure is not applicable to one-piece bearing blocks, but rather to two-piece bearing blocks according to the invention. Consequently, the present disclosure can be used not only with assembled camshafts, but also with forged camshafts where threading on the bearing blocks is not possible.
  • the second bearing body can have a through hole for receiving the first fastening means, in particular the first fastening screw, which extends through the 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 force-fitting and form-fitting 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 may 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 fastens the second bearing body to the cylinder head or fastening frame. It is also possible that the first fastening means is the only fastening means that fastens the second bearing body to the first bearing body.
  • the device further 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. This can be done in particular It must be ensured that the camshaft mounts 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 may not have a positioning element for positioning the first or second bearing body relative to the cylinder head or fastening frame. This means that the costs for the positioning elements can 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 enable small dimensions of the bearing bodies, since no additional material areas are required for the provision of holes for positioning pins.
  • the device further comprises 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.
  • 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 small dimensions of the bearing bodies, as no additional material areas are required to provide holes for positioning pins.
  • Camshaft is mounted in several devices spaced apart in the longitudinal direction of the camshaft for rotatably supporting the camshaft.
  • the device has a rocker arm spindle for rotatably supporting a rocker arm.
  • the first fastening means additionally fastens the rocker arm spindle to the cylinder head or fastening frame, and in particular also to the first and/or second bearing body. This means that a further additional fastening means for fastening the rocker arm spindle can be saved. Consequently, the assembly time can also be reduced.
  • the first bearing body has a receptacle for the rocker arm axle, which is preferably arranged on a side of the first bearing body opposite the cylinder head or fastening frame.
  • a lubricating fluid longitudinal channel of the rocker arm axis is in fluid communication 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. This allows a lubricating fluid to 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 the force-fitting and form-fitting 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 possibly 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 providing a single fastener (the first fastener) 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 commercial vehicle, with a device as disclosed herein.
  • the commercial vehicle can be, for example, a truck or a bus.
  • the Figure 1 shows a device 10 not according to the invention for rotatably supporting a camshaft 12.
  • the device 10 has a bearing body 14, a cylinder head 16, a fastening screw 18 and a rocker arm axis 20.
  • the device 10 can be used to support the camshaft 12 in any internal combustion engine.
  • the internal combustion engine can, for example, be included in a motor vehicle, in particular a commercial vehicle.
  • the commercial 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 plain bearing.
  • the receptacle 22 is a cylindrical through hole in the bearing body 14.
  • the camshaft 12 is a built camshaft. A cylindrical section of the camshaft 12 is inserted into the receptacle 22 when the camshaft 12 is dismantled. The camshaft 12 is then assembled.
  • the camshaft 12 is arranged as an overhead camshaft (OHC).
  • the bearing body 14 is attached (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 cast slug (cast 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 fastens the bearing body 14 to the cylinder head 16.
  • Conventional bearing blocks usually 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 rocker arm's cam follower during operation.
  • the own weight of the camshaft 12 also acts downwards.
  • the camshaft 12 therefore 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 ) generates a tilting moment on a support surface 29 to the cylinder head 16, which holds the first bearing body 14 securely on the cylinder head 16.
  • the bearing body 14 starting from the receptacle 22, 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. This means that the bearing body 14 can be better adapted to the available installation space.
  • the bearing body 14 can be designed 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 a casting slug (cast projection), particularly in area A, to provide a blind hole for screwing in a fastening screw. Instead, area A can be formed, for example, 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 manufacturing time and assembly time are reduced because 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 securing the bearing body 14 to the cylinder head 16.
  • the fastening screw 18 could fasten the bearing body 14 to a fastening frame 30.
  • the mounting frame 30 could then in turn be attached to a cylinder head.
  • the in Figure 1 The component shown under 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 non-positively and positively fastening the bearing body 14 to the cylinder head 16.
  • the rocker arm spindle 20 serves to rotatably support 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 additionally fastens the rocker arm spindle 20 to the cylinder head 16 (fastening frame 30).
  • the fastening screw 18 extends through a through hole 32 of the rocker arm spindle 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 spindle 20.
  • the rocker arm spindle 20 is mounted in a receptacle 21 of the bearing body 14. The additional fastening of the rocker arm spindle 20 via the fastening screw 18 is optional.
  • a lubricating fluid can be supplied via a longitudinal channel 34 of the rocker arm axis 20.
  • a branch channel 36 of the rocker arm axis 20 opens into a branch channel 38 of the bearing body 14.
  • the branch channel 38 in turn opens into the holder 22.
  • 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 in the cylinder head 16 (mounting frame 30).
  • the positioning element 40 is arranged around the fastening screw 18, preferably without touching the fastening screw 18.
  • the positioning element 42 is designed as a positioning pin.
  • the positioning element 42 is provided in a form-fitting manner in a recess 48 of the bearing body 14 and a recess 50 of the cylinder head 16 (mounting frame 30).
  • the positioning elements can also be designed as fitting sleeves, for example.
  • bearing body 14 could then be made possible, for example, by means of a guide through the camshaft 12, which is mounted in several bearing bodies 14.
  • the Figure 2 shows an embodiment according to the invention for a device 110 for rotatably supporting the camshaft 12.
  • the device 110 is characterized in particular by the fact that it is also suitable for rotatably supporting 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 the form of a cylinder 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). Specifically, the fixing 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 fixing 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 relative 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 as dowel pins, for example.
  • 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 are provided for positioning the first and second bearing bodies 14A, 14B relative to the cylinder head 16 (mounting frame 30). In further developments of this exemplary embodiment, positioning elements could be provided between the second bearing body 14B and the cylinder head 16 (mounting 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 (11)

  1. Dispositif (110) pour le support rotatif d'un arbre à cames (12) d'un moteur à combustion interne, présentant :
    un premier corps de palier (14A) comprenant un logement (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 (14A) ;
    un premier moyen de fixation (18) qui fixe le premier corps de palier (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 (14A) à la culasse (16) ou au cadre de fixation (30) ;
    caractérisé par :
    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).
  2. Dispositif (110) selon la revendication 1, dans lequel :
    le premier moyen de fixation (18) est une première vis de fixation ; et/ou
    le premier moyen de fixation (18) fixe le premier corps de palier (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 (110) selon l'une quelconque des revendications précédentes, 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.
  4. Dispositif (110) selon l'une quelconque des revendications précédentes, 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).
  5. Dispositif (110) selon l'une quelconque des revendications précédentes, 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).
  6. Dispositif (110) selon la revendication 5, 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) .
  7. Dispositif (110) selon l'une quelconque des revendications précédentes, 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 (14A) 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 (14A ; 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 (14A ; 14B) par rapport à la culasse (16) ou au cadre de fixation (30).
  8. Dispositif (110) selon la revendication 7, dans lequel l'au moins un élément de positionnement (40, 42) disposé entre le premier ou le deuxième corps de palier (14A ; 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).
  9. Dispositif (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 (14A) au cadre de fixation (30) ou à la culasse (16) au moyen du premier moyen de fixation (18).
  10. Dispositif (110) selon l'une quelconque des revendications précédentes, dans lequel :
    le premier corps de palier (14A) est réalisé de manière asymétrique par rapport à un plan vertical passant par un axe médian longitudinal du logement (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 (14A) sur une surface d'appui (29) de la culasse (16) ou du cadre de fixation (30).
  11. Véhicule automobile, en particulier véhicule utilitaire, comprenant un dispositif (110) selon l'une quelconque des revendications précédentes.
EP21157914.9A 2017-08-18 2018-07-23 Dispositif de logement rotatif d'un arbre à cames Active EP3842622B1 (fr)

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DE102017118862.2A DE102017118862A1 (de) 2017-08-18 2017-08-18 Vorrichtung zum drehbaren Lagern einer Nockenwelle
EP18184901.9A EP3450706B1 (fr) 2017-08-18 2018-07-23 Dispositif de logement rotatif d'un arbre à cames

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CN114856745A (zh) 2022-08-05
EP3450706B1 (fr) 2021-03-31
BR102018016619B1 (pt) 2023-10-03
EP3450706A1 (fr) 2019-03-06
DE102017118862A1 (de) 2019-02-21
RU2018129776A (ru) 2020-02-17
CN109404082B (zh) 2022-05-03
BR102018016619A2 (pt) 2019-07-16
CN109404082A (zh) 2019-03-01
RU2018129776A3 (fr) 2021-12-27
JP2019035410A (ja) 2019-03-07
BR102018016619A8 (pt) 2023-02-14
US20190055897A1 (en) 2019-02-21
EP3842622A1 (fr) 2021-06-30

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