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WO2008061382A1 - Ensemble arbre à cames - Google Patents

Ensemble arbre à cames Download PDF

Info

Publication number
WO2008061382A1
WO2008061382A1 PCT/CH2007/000554 CH2007000554W WO2008061382A1 WO 2008061382 A1 WO2008061382 A1 WO 2008061382A1 CH 2007000554 W CH2007000554 W CH 2007000554W WO 2008061382 A1 WO2008061382 A1 WO 2008061382A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
shaft
bearing block
functional components
assembly according
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.)
Ceased
Application number
PCT/CH2007/000554
Other languages
German (de)
English (en)
Inventor
Frank Altag
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.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Presta TecCenter AG
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 ThyssenKrupp Presta TecCenter AG filed Critical ThyssenKrupp Presta TecCenter AG
Priority to EP07816237A priority Critical patent/EP2094947A1/fr
Publication of WO2008061382A1 publication Critical patent/WO2008061382A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01L1/02—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
    • F01L1/02—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

Definitions

  • the invention relates to a camshaft assembly according to the preamble of claim 1.
  • camshaft Under a camshaft is generally a shaft with at least one cam to understand, the cam is in contact with a cam follower. By rotating the shaft, the cam follower is actuated according to the sequence or "program" anchored in the cam contour.
  • camshaft also includes subsiding shafts for mechanical variable valve trains, in which case the cams are designed as cam disks (for example as eccentric discs) and arranged correspondingly as adjusting discs on the shaft.
  • EP1593880A1 an eccentric shaft for controlling a variable valve train is presented, in which between the eccentric discs needle or Gleitla- ger are arranged with undivided outer ring.
  • the object of the invention is to provide a camshaft assembly with bearings thereon, which can be easily installed in the cylinder head of an internal combustion engine.
  • the camshaft assembly for internal combustion engines includes a shaft with functional components arranged thereon, such as drive wheel, sensor ring, pump pennocken or components for other functions, but at least one cam, and at least two bearing blocks, each with a bearing receptacle in which a shaft portion is rotatably arranged, wherein on each bearing block a plane contact surface is formed for supporting and fixing the bearing block to a bearing surface of a cylinder head and in that each bearing block has fastening means for mounting and fastening to the cylinder head, the camshaft assembly being a built-up arrangement in which the shaft is made as a separate item and the cam and, if necessary, other functional components made as separate parts are mounted on the shaft and at least one bearing block between two functional components is arranged on the shaft, wherein the bearing blocks are formed as undivided bearing blocks, wherein the abutment surfaces of the bearing blocks are arranged flat and rotatable on the shaft, that all contact surfaces parallel to are alignable to a plane.
  • functional components arranged thereon
  • the bearing of the camshaft takes place in undivided like, which can be manufactured individually with high accuracy and can be pushed onto correspondingly accurate mounting portions of the camshaft.
  • the bearings can either directly as sliding bearings, in which preferably a shaft portion of the support shaft of the camshaft is formed as a sliding partner, or as a rolling bearing, preferably as a needle bearing, be formed.
  • the outer shells of the bearings are embedded in bearing blocks or formed integrally with the bearing blocks.
  • the bearing blocks in turn have fastening sections, with which the bearing blocks and thus the entire camshaft assembly in the cylinder head is attached to the corresponding Befest Trentsab- sections. The attachment is done easiest by screws, which are passed through recesses in the bearing blocks and are screwed into corresponding threaded holes in the cylinder head.
  • bearing blocks are accurately positioned according to requirements.
  • the corresponding bearing blocks can be moved in the plane so that the bearings are all exactly on one axis and there is no tension the camshaft axis comes.
  • the friction loss can be significantly reduced.
  • the design of the module even allows for a subsequent revision of the contact surfaces of the wings, such as flat grinding in the mounting plane to completely dispense without unwanted tension on the assembled assembly occur.
  • FIG. 1 A camshaft assembly with sliding bearing in three-dimensional representation according to the invention
  • Fig. 2 is a longitudinal section of the camshaft assembly of Figure 1 with the shaft formed as a hollow shaft;
  • FIG. 3 shows a bearing block for mounting the camshaft in a three-dimensional representation according to the invention
  • FIG. 4 shows a cross section of the camshaft assembly according to the invention at the longitudinal position of a bearing block according to FIG. 2 with slide bearing;
  • FIG. 5 shows a camshaft assembly with needle bearing in three-dimensional representation according to the invention
  • FIG. 6 shows a longitudinal section of the camshaft assembly according to FIG. 5 with the shaft as a solid shaft, with only schematically illustrated drive wheel;
  • FIG. 7 shows a cross-section of a bearing block according to FIG. 3, but with needle bearing and illustration of the cam dimensions
  • FIG. 8 shows a camshaft assembly with bearing blocks with two camshafts arranged in parallel in a three-dimensional representation according to the invention
  • FIG. 9 shows a cross section of the camshaft assembly according to the invention at the longitudinal position of a bearing block with two bearing receptacles according to FIG. 8. 7 000554
  • a bearing block 4 has a bearing block recess 12 in which the shaft 2 is rotatably mounted with its axis 5 on a shaft section, as shown in FIG.
  • the shaft 2 may be formed as a hollow shaft tube or as a solid shaft.
  • the Lagerbockaus supraung 12 may be formed on its wall directly as a bearing surface 9, and together with the shaft portion form a sliding bearing assembly 8. In this case, at least the shaft portion is ground to achieve a suitable finish of the bearing surfaces.
  • the sliding bearing 8 on the side of the bearing block can also be designed as a separate bearing part 8, such as a bush or shell parts, and be used in the bearing block recess 12 with the wall as a bearing receptacle 9.
  • a bearing receptacle 9 in cross section can be used as a bearing and rolling bearings, such as preferably needle roller bearings 11 in the bearing seat 9.
  • Such a bearing block 4 is fastened with fastening means, such as screws on the cylinder head.
  • the holes can be performed directly as a snug fit or advantageously large enough game or as slots, so that at least in one Direction, preferably laterally to the shaft axis 5, a displaceable positioning is possible for the precise lateral alignment of the entire camshaft assembly 1 when mounted on the cylinder head.
  • the bearing blocks 4 have on their underside a flat bearing surface 10 on which allows them to be positioned exactly on a cylinder head provided for this purpose support surface.
  • the bearing surface or at least portions of the bearing surface on the cylinder head lie in one plane and this is precision machined to be able to precisely align the camshaft.
  • other means may be provided such as stops, steps, grooves or taps.
  • a camshaft assembly 1 is constructed from individual, prefabricated parts and joined together, as can be seen from Figures 1, 2, 5 and 6.
  • the camshaft assembly 1 includes a shaft 2 with at least two bearing blocks 4 and arranged on the shaft 2 cam 3 and other functional components, such as drive wheel 15, sensor ring 14, pump cam 16 or components for other functions.
  • the components are pushed according to the desired order and later position accordingly on the shaft and the parts to be fixed, such as cam 3, attached thereto.
  • at least one bearing block 4 between two functional components 3, 14, 15, 16, which are rotatably connected to the shaft 2 is arranged.
  • a drive wheel 15 rotatably mounted on the shaft 2 and then followed by a bearing block 4, which rotatably receives the shaft and after the bearing block 4 a mounted on the shaft 2 sensor ring 14 or a cam 3 or other functional component this is shown in Figures 5 and 6. In the figures it is also shown how a bearing block 4 is arranged between each cam 3.
  • the components, as mentioned, must be sequentially arranged in the correct order on the shaft 2 and so assembled into a built camshaft assembly.
  • the envelopes 13 of the eccentrically rotating cams 3 and / or functional components have a larger diameter D than the inner diameter d of the recess 12 of the bearing receptacle 9 on the bearing block 4, as shown in FIG.
  • Cams 3 and / or functional components mounted on the shaft 2 can thus not be guided through the bearing block recess 12 with such small inner diameters d.
  • the attachment of the arranged next to the bearing block 4 functional components 3, 14, 15, 16 are pressed with advantage on expanded shaft sections and thereby fixed non-positively or non-positively and positively on the shaft 2.
  • the expansion of the shaft section can be produced by knurling or rolling in the longitudinal and / or transverse direction or diagonal direction to the longitudinal axis 5 of the shaft 2.
  • a further suitable possibility for fastening the functional components 3, 14, 15, 16 arranged next to the bearing block 4 can be created on the shaft 2 by means of welding, preferably with laser welding. It is also possible to fix the functional components 3, 14, 15, 16 arranged next to the bearing block 4 by means of shrink fit on the shaft 2.
  • This type of design of the camshaft assembly 1 together with the undivided design of the bearing blocks 4 enables the individual parts to be produced particularly advantageously in a mass production with conventional precision and then the assembly 1 can be mounted, the precision of which for a direct Installation in the cylinder head of an internal combustion engine is sufficient.
  • the shaft sections are made precisely before assembly, at the intended for the bearings axial positions, depending on the selected bearing, preferably ground.
  • the recesses 12 of the bearing blocks 4 are also manufactured with the required precision.
  • the bearing blocks 4 can be designed as ready-to-install sintered parts, as sintered parts which have been reworked or can also be made of steel in a mechanical processing. It is also conceivable and possible to produce the bearing blocks 4 from castings, for example from cast aluminum, and to rework them accordingly.
  • the bearing blocks 4 are rotated around the shaft 2 for the assembly of the entire assembly such that all of their contact surfaces 10 are aligned parallel to one or in a plane.
  • the deviation from the flatness of the entire surface is less than 0.1 mm, preferably less than 0.05 mm.
  • channels 17 are integrated into the bearing blocks.
  • the separate production of the bearing block 4 makes it possible to easily introduce into the bearing block 4 channels 17 for an oil supply of the bearing. This is particularly advantageous in the case of using a sliding bearing.
  • a bore 17 is introduced perpendicular to the bearing surface 10 of the bearing block from the side of the contact surface 10 to the opening 12, as illustrated in Figures 3 and 4, in the bearing block.
  • Conceivable and possible, however, are also channels that are arranged differently.
  • a ring channel can be provided with corresponding openings in the direction of the bearing receptacle 9 and a corresponding feed.
  • a corresponding channel may be introduced, which is closed with a lid.
  • such channels can be made integral with the manufacture of the bearing block.
  • the camshaft assembly 1 comprises bearing blocks, which are connected to each other via the shaft 2 before installation in the internal combustion engine . Only when installing the camshaft assembly, the bearing blocks are also connected via the cylinder head. As a result, an overdetermination of the bearing of the shaft is avoided.
  • the shaft is mounted stress-free in the cylinder head.
  • elongated holes 6, 6 'or enlarged holes 6, 6' are provided in the fastening means 7, 7 'of at least the bearing blocks 4, which are arranged between the outer bearing blocks 4 of the camshaft assembly 1.
  • each of the shafts 2, 2 ' is supported by associated bearing blocks 4, 4 "
  • the present concept makes it possible, for example, to combine two shafts into a single module one of the two shafts 2, 2 'are assigned and are positioned opposite to a bearing block group 4, 4', preferably combined to form a bearing block pair, preferably via a mechanical connection 20, which connects the two bearing blocks 4, 4 'with the plates
  • the bearing block group 4, 4 'formed in this way is preferably provided with a common contact surface 10.
  • This bearing block group 4, 4' can itself be referred to as a bearing block with at least two bearing receptacles in that the bearing block forms a unit with the at least two bearing receptacles and preferably consists of one piece on a cylinder head, for example, as described above via Befest Trentsaus predominantlyun- gene 6, 6 ', 6 ", such as holes.
  • this assembly has 1 at least at the shaft ends such a bearing block with two bearing mounts and it can be provided on the shafts more bearing areas, which also have individual undivided position blocks.
  • each contact surface 10 at each two adjacent bearing blocks 4 ', 4 " can preferably be aligned in a common surface, in the preferred variant in which these are combined in a bearing block group 4', 4", as shown in FIGS. each contact surface of the respective bearing block group 4 ', 4 "is preferably aligned in a common plane.
  • one of the bearing blocks 4 may be formed in addition to the rotary mounting of the shaft 2 with an axial bearing of the shaft in one or both axial directions.
  • one or both axial side surfaces of the bearing block 4 may be formed with a corresponding running surface on which a corresponding running surface of another functional component 3, 14, 15, 16 of the camshaft assembly 1 is axially supported.
  • edge-side bearing blocks 4 of the camshaft assembly 1 are preferably selected.
  • the camshaft assembly 1 does not include all bearings in which the camshaft is mounted in the internal combustion engine.
  • the counterpart can be arranged for the axial bearing in the cylinder head.
  • individual bearings or bearings can be incorporated into the cylinder head, are inserted into the prepared sections of the shaft of the camshaft assembly 1.
  • this case is considered a special case.
  • the camshaft assembly 1 can be stored in different types of bearings (such as sliding, needle, roller bearings) at the same time.
  • the shaft may be partially hollow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Ensemble arbre à cames comprenant un arbre (2) sur lequel sont disposés des éléments fonctionnels (14, 15, 16) mais au moins une came (3) et au moins deux supports de palier (4) pourvus chacun d'un logement de palier (9) dans lequel un tronçon d'arbre est monté à rotation. Une surface d'appui plane (10) est formée sur chaque support de palier (4) pour l'appui et la fixation du support de palier (4) sur une surface d'appui d'une culasse. L'ensemble arbre à cames (1) est un ensemble assemblé, dans lequel l'arbre (2) est réalisé sous forme de pièce détachée, la came (3) et en cas de besoin d'autres éléments fonctionnels (14, 15, 16), qui sont réalisés sous forme de pièces détachées, sont montés sur l'arbre (2), et au moins un support de palier (4) est disposé entre deux éléments fonctionnels (3, 14, 15, 16) sur l'arbre (2), sachant que les supports de palier (4) sont réalisés sous forme de supports de palier (4) en une pièce, les surfaces d'appui (10) des supports de palier étant planes et montées à rotation sur l'arbre de telle sorte que toutes les surfaces d'appui (10) peuvent être orientées dans un plan.
PCT/CH2007/000554 2006-11-20 2007-11-09 Ensemble arbre à cames Ceased WO2008061382A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07816237A EP2094947A1 (fr) 2006-11-20 2007-11-09 Ensemble arbre à cames

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH18632006 2006-11-20
CH1863/06 2006-11-20
CH8762007 2007-06-01
CH876/07 2007-06-01

Publications (1)

Publication Number Publication Date
WO2008061382A1 true WO2008061382A1 (fr) 2008-05-29

Family

ID=39145108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2007/000554 Ceased WO2008061382A1 (fr) 2006-11-20 2007-11-09 Ensemble arbre à cames

Country Status (2)

Country Link
EP (1) EP2094947A1 (fr)
WO (1) WO2008061382A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010072194A1 (fr) * 2008-12-22 2010-07-01 Volkswagen Ag Procédé et dispositif de positionnement de plusieurs éléments fonctionnels dans une position angulaire définie sur un arbre
GB2467334A (en) * 2009-01-30 2010-08-04 Mechadyne Plc Assembled camshaft for i.c. engines
CN102235189A (zh) * 2010-05-04 2011-11-09 Dr.Ing.h.c.F.保时捷股份公司 内燃发动机
CN102762337A (zh) * 2009-12-24 2012-10-31 大众汽车有限公司 用于装配轴罩模块的装配装置和方法
JP2013044431A (ja) * 2011-08-24 2013-03-04 Mahle Internatl Gmbh ベアリングブロック
CN103174487A (zh) * 2013-04-03 2013-06-26 中国兵器工业集团第七0研究所 一种发动机凸轮轴
CN103306765A (zh) * 2013-06-19 2013-09-18 安徽江淮汽车股份有限公司 一种高压油泵驱动凸轮及发动机的凸轮轴结构
DE102017118862A1 (de) 2017-08-18 2019-02-21 Man Truck & Bus Ag Vorrichtung zum drehbaren Lagern einer Nockenwelle
CN111706415A (zh) * 2019-03-18 2020-09-25 欧德克斯有限公司 组装凸轮轴的支承构造
CN112154274A (zh) * 2018-05-14 2020-12-29 蒂森克虏伯普利斯坦技术中心股份公司 凸轮轴和制造凸轮轴的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664463A (en) * 1993-03-03 1997-09-09 Amborn; Peter Camshaft assembly with shaft elements positioned one inside the other and method of producing same
EP0866216A1 (fr) * 1997-03-21 1998-09-23 Stefan Battlogg Arbre à cames
DE19831772A1 (de) * 1997-07-16 1999-01-28 Stefan Battlogg Zylinderkopf, Nockenwelle und Verfahren zur Montage einer Nockenwelle in einem Zylinderkopf
US5884593A (en) * 1996-04-24 1999-03-23 Tecumseh Products Company Head and overhead camshaft assembly for an internal combustion engine
WO2002016741A1 (fr) * 2000-08-18 2002-02-28 Jesel, Inc. Ensemble arbre a cames modulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664463A (en) * 1993-03-03 1997-09-09 Amborn; Peter Camshaft assembly with shaft elements positioned one inside the other and method of producing same
US5884593A (en) * 1996-04-24 1999-03-23 Tecumseh Products Company Head and overhead camshaft assembly for an internal combustion engine
EP0866216A1 (fr) * 1997-03-21 1998-09-23 Stefan Battlogg Arbre à cames
DE19831772A1 (de) * 1997-07-16 1999-01-28 Stefan Battlogg Zylinderkopf, Nockenwelle und Verfahren zur Montage einer Nockenwelle in einem Zylinderkopf
WO2002016741A1 (fr) * 2000-08-18 2002-02-28 Jesel, Inc. Ensemble arbre a cames modulaire

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101499742B1 (ko) * 2008-12-22 2015-03-06 폭스바겐 악티엔 게젤샤프트 다수의 기능 부재를 샤프트에 미리 정해진 각 위치로 위치 설정하기 위한 방법 및 장치
CN102265006A (zh) * 2008-12-22 2011-11-30 大众汽车有限公司 用于将多个功能元件定位在轴上的预定的角位置中的方法和装置
WO2010072194A1 (fr) * 2008-12-22 2010-07-01 Volkswagen Ag Procédé et dispositif de positionnement de plusieurs éléments fonctionnels dans une position angulaire définie sur un arbre
CN102265006B (zh) * 2008-12-22 2013-09-25 大众汽车有限公司 用于将多个功能元件定位在轴上的预定的角位置中的方法和装置
GB2467334A (en) * 2009-01-30 2010-08-04 Mechadyne Plc Assembled camshaft for i.c. engines
CN102762337A (zh) * 2009-12-24 2012-10-31 大众汽车有限公司 用于装配轴罩模块的装配装置和方法
CN102762337B (zh) * 2009-12-24 2015-01-21 大众汽车有限公司 用于装配轴罩模块的装配装置和方法
CN102235189A (zh) * 2010-05-04 2011-11-09 Dr.Ing.h.c.F.保时捷股份公司 内燃发动机
KR101248666B1 (ko) 2010-05-04 2013-03-28 독터. 인제니어. 하.체. 에프. 포르쉐 악티엔게젤샤프트 내연 기관
JP2013044431A (ja) * 2011-08-24 2013-03-04 Mahle Internatl Gmbh ベアリングブロック
CN103174487A (zh) * 2013-04-03 2013-06-26 中国兵器工业集团第七0研究所 一种发动机凸轮轴
CN103306765A (zh) * 2013-06-19 2013-09-18 安徽江淮汽车股份有限公司 一种高压油泵驱动凸轮及发动机的凸轮轴结构
DE102017118862A1 (de) 2017-08-18 2019-02-21 Man Truck & Bus Ag Vorrichtung zum drehbaren Lagern einer Nockenwelle
EP3842622A1 (fr) 2017-08-18 2021-06-30 MAN Truck & Bus SE Dispositif de logement rotatif d'un arbre à cames
US12221939B2 (en) 2017-08-18 2025-02-11 MAN Truck &Bus AG Device for rotatable mounting of a camshaft
CN112154274A (zh) * 2018-05-14 2020-12-29 蒂森克虏伯普利斯坦技术中心股份公司 凸轮轴和制造凸轮轴的方法
CN111706415A (zh) * 2019-03-18 2020-09-25 欧德克斯有限公司 组装凸轮轴的支承构造

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