EP1445434B1 - Internal combustion engine with valve lift adjustment - Google Patents

Internal combustion engine with valve lift adjustment Download PDF

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Publication number
EP1445434B1
EP1445434B1 EP04000305A EP04000305A EP1445434B1 EP 1445434 B1 EP1445434 B1 EP 1445434B1 EP 04000305 A EP04000305 A EP 04000305A EP 04000305 A EP04000305 A EP 04000305A EP 1445434 B1 EP1445434 B1 EP 1445434B1
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EP
European Patent Office
Prior art keywords
shaft
cylinder head
bearing
camshaft
cylinder
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.)
Expired - Lifetime
Application number
EP04000305A
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German (de)
French (fr)
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EP1445434A1 (en
Inventor
Karl Treffler
Torsten Eder
Georg Malek
Benedikt Dr. Klaus
Axel Temmesfeld
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP1445434A1 publication Critical patent/EP1445434A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/13—Throttleless

Definitions

  • the invention relates to an internal combustion engine with stroke adjustment the gas exchange valves, comprising a camshaft, an apparatus for Stroke adjustment of a gas exchange valve, which is adjacent to the camshaft is arranged and cooperates with this, a cylinder head with at least a split bearing for the camshaft and a cylinder head cover in the Assembly condition covers the cylinder head.
  • the refers Invention on an internal combustion engine in which the device for Stroke adjustment of a gas exchange valve actuated by the camshaft Swivel lever for lifting the gas exchange valves has, as well as a Eccentric shaft, which is the pivot lever for adjusting the stroke of each associated gas exchange valve pivoted
  • Object of the present invention is to provide a stiffer Hub Oundelstellmechanismus show for a generic internal combustion engine.
  • the lifting actuator pivot lever for lifting operation the gas exchange valves which actuates via cam of the camshaft be, as well as continue an eccentric shaft
  • the pivot lever for adjustment pivoted the stroke of the respective associated gas exchange valve wherein for the Eccentric shaft split bearings are provided on the cylinder head, the division plane substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover extends and wherein eccentric shaft bearing on the parting plane between the cylinder head and the cylinder head cover to the outside protrude.
  • the Hubverstellvorraum detected Swivel lever for lifting the gas exchange valves.
  • the swivel levers will be operated via cam of the camshaft.
  • the Hubverstellvorraum includes an eccentric shaft, which the pivot lever for adjusting the stroke of each associated gas exchange valve pivoted, with the eccentric shaft also Split bearings are provided on the cylinder head.
  • the division level of Eccentric shaft bearing extends substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover, resulting in a very uniform Load in the same, combined with an improved bearing stiffness and lower mounting tolerance is achieved.
  • the shaft carrier may be integrally formed with the cylinder head. However, it is also possible to attach the shaft carrier releasably attached to the cylinder head. It is It is conceivable, the shaft carrier before a finishing of the cylinder head on the same and the finishing on both elements in common make. However, the integral variant tends to have a lower weight and is advantageously spatially more compact.
  • the eccentric shaft bearings are also on the dividing plane between the cylinder head and the cylinder head cover in the direction of Cylinder head cover in front.
  • the eccentric shaft and its bearings and other components of the Hubverstellvorraum, in particular the pivot lever easily accessible.
  • an individual assembly and disassembly of Eccentric shaft possible.
  • a further advantageous solution is that divided at the cylinder head Eccentric shaft bearings are provided which, via the dividing plane between the Cylinder head and the cylinder head cover protrude outward and the division plane substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover and the cylinder head extends a shaft carrier and a split eccentric shaft bearing clamped against the shaft carrier Has bearing cap, wherein on the shaft carrier and on the bearing cap respectively a bearing shell portion is provided and both the shaft carrier as also the bearing cap of the eccentric shaft bearing on the division plane between protrude the cylinder head and the cylinder head cover and on the shaft carrier a slotted guide is attached, the pivot lever perpendicular to the parting plane supported between the cylinder head and the cylinder head cover.
  • the shaft carrier lubricant channels it is possible to form in the shaft carrier lubricant channels, the optionally connect to lubricant channels in the cylinder head and the Supply lubricant to camshaft bearing and eccentric shaft bearing.
  • the shaft carrier directed to the cam of the camshaft lubricant nozzles to provide spray cooling of the cams. This can be otherwise required facilities for lubricant supply to the desired locations save on.
  • a second camshaft may be provided parallel to the first camshaft.
  • the second camshaft is preferably mounted in a bearing strip, which in turn is arranged next to the shaft carrier and detachable on the cylinder head is attached. This allows for the eccentric shaft with respect to the power flow optimal division level of the bearings to be maintained.
  • the bearing bar preferably extends substantially parallel to and above the Division plane between the cylinder head and the cylinder head cover. This allows a further favorable and independent assembly and disassembly of the Camshafts, the eccentric shaft and the sliding guide, since the second Camshaft with the bearing block forms a detachable from the cylinder head unit.
  • FIG. 1 and 2 shows a section from an internal combustion engine 1 for a passenger car, the For example, a straight six-cylinder engine can be.
  • the internal combustion engine 1 comprises a cylinder block with one at this In the cylinder head 2 is attached in a conventional manner Variety of gas exchange valves 3 was added, indirectly via an on the Cylinder head 2 stored camshaft 4 are opened and closed.
  • gas exchange valves and Camshaft on the inlet side are referred to below with 3a and 4a, respectively Corresponding elements on the outlet side, however, with 3b and 4b designated.
  • the Device for stroke adjustment 5 allows the saving of a possible circumstances required throttle.
  • the device for fully variable stroke adjustment 5 is in EP 1 143 118 A2 explained in more detail, the contents of which included here so far becomes.
  • the cylinder head 2 is including the shafts 4 a, 4 b and 8 mounted thereon and the Hubverstellvorraum 5 by a cylinder head cover 11 upwards sealed.
  • Suitable sealing flanges 13 and 14 on the cylinder head 2 and the Cylinder head cover 11 extend in a common division plane 12 and are clamped together by bolts 15.
  • the split camshaft bearing 16 each have one Bearing shell portion 17 which is integral with one on the cylinder head. 2 provided shaft carrier 18 is formed. Another bearing shell section 19 is formed on a bearing cap 20 which communicates with the shaft carrier 18 via Bolt 21 is braced.
  • a special feature of the arrangement of the bearing cap 20 is in the substantial vertical alignment of the associated bearing dividing plane 22 to the dividing plane 12 between the cylinder head 2 and the cylinder head cover 11. This makes deviations of up to 20 degrees from one severe vertical orientation included. Preferably, the deviation remains but less than about 5 to 10 degrees. In the embodiment in Figure 1 with rectangular arrangement of the dividing planes 12 and 22, this means that the Dividing plane 22 between the bearing cap 20 and the shaft support 18 of the Cylinder head 2 substantially vertically, the dividing plane 12 between the Cylinder head 2 and the cylinder head cover 11, however, substantially horizontal runs.
  • the fastening bolts 21 for the bearing cap 20 and their clamping directions are perpendicular to the dividing plane 22 between the bearing cap 20 and the carrier 18. This allows a very even load on the Camshaft bearing 16 and the associated clamping elements, as the Reaction forces out of engagement between the cam 9 and the rollers to the Swing levers 6 well arranged on both sides of the camshaft 4 Fixing bolts 21 are distributed.
  • the bearing of the eccentric shaft 8 takes place on the shaft support 18 at the Inlet camshaft 4a opposite side in substantially vertical divided eccentric shaft bearings 23.
  • the eccentric shaft bearings 23 each comprise a formed on the shaft support 18 bearing cup portion 26 and a braced with the bearing shell portion 26 by fastening members 24 Bearing cover 27, which in turn also forms a bearing shell 29.
  • the Division plane 28 of the eccentric shaft bearing 23 thus extends substantially parallel to the dividing plane 22 of the camshaft bearing 16. So is also on Side of the eccentric shaft 8 a uniform load in the attachment member 24 scored for the bearing cap 27.
  • the bearing cap 27 from the side good at the shaft support 18 can be mounted, regardless of the mounting of the Camshaft 4a and the slide guide 10th
  • the vertical pitch of the camshaft bearing 16 and the eccentric shaft 23rd also reduces the mounting tolerance. This has a positive effect on the Uniform distribution of the strokes of the gas exchange valves 3a. In addition, this allows Arrangement of a cylinder-selective DC distribution repair.
  • the shaft carrier 18 is integral with the cylinder head in the embodiment 2 trained. However, it is also possible to use a separate shaft carrier 18 use, which is releasably secured to the cylinder head 2. Will be a separate one Used shaft carrier 18, so this can with the cylinder head 2 together be finished.
  • lubricant channels can be formed, which are connected to other lubricant channels in the cylinder head 2 and provide lubricant to the camshaft bearings 16 and eccentric shaft bearings 23. It can be on the shaft support 18 on the cam 9 of the camshaft. 4 directed lubricant nozzles are provided for spray cooling of the cam 9.
  • the outlet camshaft 4b is mounted in a bearing strip 30 and forms with this together a unit, the total next to the eccentric shaft 8 at the Cylinder block 2 is attached. In this way, the exhaust camshaft 4b if necessary simply disassemble. In particular, this is a good Accessibility of the eccentric shaft 8 and the eccentric shaft 23 ensures.
  • Figure 1 shows, and the bearing block 30 in the parting plane 12 at the Cylinder head 2 attached. However, since their attachment is made from above, so it is conceivable to partially sink the bearing strip 30 in the cylinder head 2.
  • a bearing bar 30 can for the exhaust camshaft 4b in principle also a conventional storage with bearing shell sections on the cylinder head and separate bearing caps are provided.
  • the invention is not limited to the embodiment described above limited. This is merely for the purpose of explaining the principle of vertical pitch of the camshaft bearing 16 and / or eccentric shaft 23rd

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

Description

Die Erfindung bezieht sich auf eine Verbrennungskraftmaschine mit Hubverstellung der Gaswechselventile, umfassend eine Nockenwelle, eine Vorrichtung zur Hubverstellung eines Gaswechselventils, die benachbart zu der Nockenwelle angeordnet ist und mit dieser zusammenwirkt, einen Zylinderkopf mit mindestens einem geteilten Lager für die Nockenwelle und einen Zylinderkopfdeckel, der im Zusammenbauzustand den Zylinderkopf abdeckt. Weiterhin bezieht sich die Erfindung auf eine Verbrennungskraftmaschine, bei der die Vorrichtung zur Hubverstellung eines Gaswechselventils einen durch die Nockenwelle betätigten Schwenkhebel zur Hubbetätigung der Gaswechselventile aufweist, sowie eine Exzenterwelle, die die Schwenkhebel zur Verstellung des Hubs des jeweils zugehörigen Gaswechselventils verschwenkt The invention relates to an internal combustion engine with stroke adjustment the gas exchange valves, comprising a camshaft, an apparatus for Stroke adjustment of a gas exchange valve, which is adjacent to the camshaft is arranged and cooperates with this, a cylinder head with at least a split bearing for the camshaft and a cylinder head cover in the Assembly condition covers the cylinder head. Furthermore, the refers Invention on an internal combustion engine, in which the device for Stroke adjustment of a gas exchange valve actuated by the camshaft Swivel lever for lifting the gas exchange valves has, as well as a Eccentric shaft, which is the pivot lever for adjusting the stroke of each associated gas exchange valve pivoted

Die Erfindung geht von der JP-A-4 143410 aus. In dieser ist eine Verbrennungskraftmaschine mit Hubverstellung der Gaswechselventile beschrieben, die folgende Merkmale umfasst:

  • Figure 00020001
    Eine Nockenwelle,
  • eine Vorrichtung zur Hubverstellung eines Gaswechselventils, die benachbart zu der Nockenwelle angeordnet ist und mit dieser zusammenwirkt,
  • einen Zylinderkopf mit mindestens einem geteilten Lager für die Nockenwelle und
  • einen Zylinderkopfdeckel, der im Zusammenbauzustand den Zylinderkopf abdeckt, wobei
  • die geteilten Nockenwellenlager an dem Zylinderkopf über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel nach außen vorstehen und
  • die Teilungsebene der geteilten Nockenwellenlager im wesentlichen senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel verläuft und wobei
  • der Zylinderkopf einen Wellenträger und ein geteiltes Nockenwellenlager gegen einen den Wellenträger verspannten Lagerdeckel aufweist, wobei
  • an dem Wellenträger und an dem Lagerdeckel jeweils ein Lagerschalenabschnitt vorgesehen ist und
  • sowohl der Wellenträger als auch der Lagerdeckel des Nockenwellenlagers über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel vorstehen.
    • The invention is based on JP-A-4 143410. In this an internal combustion engine with stroke adjustment of the gas exchange valves is described, comprising the following features:
  • Figure 00020001
    A camshaft,
  • a device for the stroke adjustment of a gas exchange valve, which is arranged adjacent to the camshaft and cooperates therewith,
  • a cylinder head with at least one split bearing for the camshaft and
  • a cylinder head cover, which covers the cylinder head in the assembled state, wherein
  • projecting the split camshaft bearing on the cylinder head over the dividing plane between the cylinder head and the cylinder head cover to the outside and
  • the dividing plane of the split camshaft bearing extends substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover, and wherein
  • the cylinder head has a shaft carrier and a split camshaft bearing against a shaft carrier tense bearing cap, wherein
  • on the shaft carrier and on the bearing cap a bearing shell portion is provided and
  • both the shaft carrier and the bearing cap of the camshaft bearing protrude beyond the dividing plane between the cylinder head and the cylinder head cover.

    • Aufgabe der vorliegenden Erfindung ist es, einen steiferen Hubhöhenverstellmechanismus für eine gattungsgemäße Verbrennungskraftmaschine aufzuzeigen.Object of the present invention is to provide a stiffer Hubhöhenverstellmechanismus show for a generic internal combustion engine.

    Diese Aufgabe wird von den Merkmalen im kennzeichnenden Teil des Patentanspruchs 1 dadurch gelöst, dass die Hubstellvorrichtung Schwenkhebel zur Hubbetätigung der Gaswechselventile umfasst, die über Nocken der Nockenwelle betätigt werden, sowie weiterhin eine Exzenterwelle, die die Schwenkhebel zur Verstellung des Hubs des jeweils zugehörigen Gaswechselventils verschwenkt, wobei für die Exzenterwelle geteilte Lager an dem Zylinderkopf vorgesehen sind, deren Teilungsebene im wesentlichen senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel verläuft und wobei Exzenterwellenlager über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel nach außen vorstehen.This object is achieved by the features in the characterizing part of the claim 1 achieved in that the lifting actuator pivot lever for lifting operation the gas exchange valves, which actuates via cam of the camshaft be, as well as continue an eccentric shaft, the pivot lever for adjustment pivoted the stroke of the respective associated gas exchange valve, wherein for the Eccentric shaft split bearings are provided on the cylinder head, the division plane substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover extends and wherein eccentric shaft bearing on the parting plane between the cylinder head and the cylinder head cover to the outside protrude.

    In der vorteilhaften Ausgestaltung der Erfindung erfasst die Hubverstellvorrichtung Schwenkhebel zur Hubbetätigung der Gaswechselventile. Die Schwenkhebel werden über Nocken der Nockenwelle betätigt. Zudem umfasst die Hubverstellvorrichtung eine Exzenterwelle, die die Schwenkhebel zur Verstellung des Hubs des jeweils zugehörigen Gaswechselventils verschwenkt, wobei für die Exzenterwelle ebenfalls geteilte Lager an dem Zylinderkopf vorgesehen sind. Die Teilungsebene der Exzenterwellenlager verläuft im wesentlichen senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel, wodurch eine sehr gleichmäßige Belastung in den selben, verbunden mit einer verbesserten Lagersteifigkeit und geringeren Montagetoleranz erzielt wird. In the advantageous embodiment of the invention, the Hubverstellvorrichtung detected Swivel lever for lifting the gas exchange valves. The swivel levers will be operated via cam of the camshaft. In addition, the Hubverstellvorrichtung includes an eccentric shaft, which the pivot lever for adjusting the stroke of each associated gas exchange valve pivoted, with the eccentric shaft also Split bearings are provided on the cylinder head. The division level of Eccentric shaft bearing extends substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover, resulting in a very uniform Load in the same, combined with an improved bearing stiffness and lower mounting tolerance is achieved.

    Der Wellenträger kann integral mit dem Zylinderkopf ausgebildet sein. Es ist jedoch auch möglich, den Wellenträger lösbar an dem Zylinderkopf zu befestigen. Dabei ist es denkbar, den Wellenträger vor einer Endbearbeitung des Zylinderkopfes an dem selben zu befestigen und die Endbearbeitung an beiden Elementen gemeinsam vorzunehmen. Die integrale Variante besitzt jedoch ein tendenziell geringeres Gewicht und ist in vorteilhafter Weise räumlich kompakter. The shaft carrier may be integrally formed with the cylinder head. However, it is also possible to attach the shaft carrier releasably attached to the cylinder head. It is It is conceivable, the shaft carrier before a finishing of the cylinder head on the same and the finishing on both elements in common make. However, the integral variant tends to have a lower weight and is advantageously spatially more compact.

    Vorzugsweise stehen auch die Exzenterwellenlager über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel in Richtung des Zylinderkopfdeckels vor. Damit sind die Exzenterwelle und deren Lager sowie weitere Komponenten der Hubverstellvorrichtung, insbesondere der Schwenkhebel, gut zugänglich. Insbesondere ist eine individuelle Montage und Demontage der Exzenterwelle möglich. Preferably, the eccentric shaft bearings are also on the dividing plane between the cylinder head and the cylinder head cover in the direction of Cylinder head cover in front. Thus, the eccentric shaft and its bearings and other components of the Hubverstellvorrichtung, in particular the pivot lever, easily accessible. In particular, an individual assembly and disassembly of Eccentric shaft possible.

    Eine weitere vorteilhafte Lösung besteht darin, dass an dem Zylinderkopf geteilte Exzenterwellenlager vorgesehen sind, die über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel nach außen vorstehen und deren Teilungsebene im wesentlichen senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel verläuft und der Zylinderkopf einen Wellenträger und ein geteiltes Exzenterwellenlager einen gegen den Wellenträger verspannten Lagerdeckel aufweist, wobei an dem Wellenträger und an dem Lagerdeckel jeweils ein Lagerschalenabschnitt vorgesehen ist und sowohl der Wellenträger als auch der Lagerdeckel des Exzenterwellenlagers über die Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel vorstehen und an dem Wellenträger eine Kulissenführung befestigt ist, die den Schwenkhebel senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel abstützt.A further advantageous solution is that divided at the cylinder head Eccentric shaft bearings are provided which, via the dividing plane between the Cylinder head and the cylinder head cover protrude outward and the division plane substantially perpendicular to the dividing plane between the cylinder head and the cylinder head cover and the cylinder head extends a shaft carrier and a split eccentric shaft bearing clamped against the shaft carrier Has bearing cap, wherein on the shaft carrier and on the bearing cap respectively a bearing shell portion is provided and both the shaft carrier as also the bearing cap of the eccentric shaft bearing on the division plane between protrude the cylinder head and the cylinder head cover and on the shaft carrier a slotted guide is attached, the pivot lever perpendicular to the parting plane supported between the cylinder head and the cylinder head cover.

    Im Hinblick auf den Kraftfluß ideal ist eine Anordnung, bei der die Lagerdeckel für die Nockenwellenlager und die Exzenterwellenlager an gegenüberliegenden Seiten des Wellenträgers angeordnet sind. With regard to the power flow ideal is an arrangement in which the bearing cap for the camshaft bearings and the eccentric shaft bearings on opposite sides the wave carrier are arranged.

    An letzterem können gemäß einer weiteren, vorteilhaften Ausgestaltung der Erfindung zudem ein Stellmotor und ein Drehwinkelgeber für die Exzenterwelle befestigt sein.At the latter, according to a further advantageous embodiment of the Invention also a servo motor and a rotary encoder for the eccentric shaft be attached.

    Überdies ist es möglich, in dem Wellenträger Schmiermittelkanäle auszubilden, die gegebenenfalls an Schmiermittelkanäle in dem Zylinderkopf anschließen und die Nockenwellenlager und Exzenterwellenlager mit Schmiermittel versorgen. Durch eine entsprechende Führung der Schmiermittelkanäle ist es weiterhin möglich, an dem Wellenträger auf die Nocken der Nockenwelle gerichtete Schmiermitteldüsen zur Spritzkühlung der Nocken vorzusehen. Hierdurch lassen sich ansonsten benötigte Einrichtungen zur Schmiermittelzufuhr an die gewünschten Stellen einsparen.Moreover, it is possible to form in the shaft carrier lubricant channels, the optionally connect to lubricant channels in the cylinder head and the Supply lubricant to camshaft bearing and eccentric shaft bearing. By a corresponding leadership of the lubricant channels, it is still possible to the shaft carrier directed to the cam of the camshaft lubricant nozzles to provide spray cooling of the cams. This can be otherwise required facilities for lubricant supply to the desired locations save on.

    Für die Abstützung der Schwenkhebel kommen Kulissenführungen zum Einsatz, die im Hinblick auf einen optimierten Kraftfluß vorzugsweise auf dem Wellenträger befestigt werden, so daß diese die Schwenkhebel senkrecht zu der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel abstützen.For the support of the pivot levers slide guides are used, the with regard to an optimized power flow preferably on the shaft carrier be attached so that these pivoting levers perpendicular to the parting plane supported between the cylinder head and the cylinder head cover.

    Parallel zu der ersten Nockenwelle kann eine zweite Nockenwelle vorgesehen werden. Die zweite Nockenwelle wird vorzugsweise in einer Lagerleiste gelagert, die ihrerseits neben dem Wellenträger angeordnet und an dem Zylinderkopf lösbar befestigt ist. Dadurch kann für die Exzenterwelle eine im Hinblick auf den Kraftfluß optimale Teilungsebene der Lager beibehalten werden.Parallel to the first camshaft, a second camshaft may be provided become. The second camshaft is preferably mounted in a bearing strip, which in turn is arranged next to the shaft carrier and detachable on the cylinder head is attached. This allows for the eccentric shaft with respect to the power flow optimal division level of the bearings to be maintained.

    Die Lagerleiste verläuft bevorzugt im wesentlichen parallel zu und oberhalb der Teilungsebene zwischen dem Zylinderkopf und dem Zylinderkopfdeckel. Dies erlaubt eine weiterhin günstige und unabhängige Montage und Demontage der Nockenwellen, der Exzenterwelle und der Kulissenführung, da die zweite Nockenwelle mit der Lagerleiste eine vom Zylinderkopf abnehmbare Einheit bildet.The bearing bar preferably extends substantially parallel to and above the Division plane between the cylinder head and the cylinder head cover. This allows a further favorable and independent assembly and disassembly of the Camshafts, the eccentric shaft and the sliding guide, since the second Camshaft with the bearing block forms a detachable from the cylinder head unit.

    Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten, bevorzugten Ausführungsbeispiels näher erläutert. Die Zeichnung zeigt in:

    Figur 1
    einen Vertikalschnitt durch eine Verbrennungskraftmaschine nach der Erfindung, wobei hier lediglich der Bereich um den Zylinderkopf dargestellt ist, und in
    Figur 2
    eine schematische Schnittansicht durch den Wellenträger und die Lager der Nockenwelle und der Exzenterwelle.
    The invention will be explained in more detail with reference to a preferred embodiment shown in the drawing. The drawing shows in:
    FIG. 1
    a vertical section through an internal combustion engine according to the invention, wherein only the area around the cylinder head is shown here, and in
    FIG. 2
    a schematic sectional view through the shaft carrier and the bearings of the camshaft and the eccentric shaft.

    Das in den Figuren 1 und 2 dargestellte Ausführungsbeispiel zeigt einen Ausschnitt aus einer Verbrennungskraftmaschine 1 für ein Personkraftfahrzeug, die beispielweise ein Reihensechszylindermotor sein kann.The embodiment shown in Figures 1 and 2 shows a section from an internal combustion engine 1 for a passenger car, the For example, a straight six-cylinder engine can be.

    Die Verbrennungskraftmaschine 1 umfaßt einen Zylinderblock mit einem an diesem in herkömmlicher Weise befestigten Zylinderkopf 2. In dem Zylinderkopf 2 ist eine Vielzahl von Gaswechselventilen 3 aufgenommen, die mittelbar über eine an dem Zylinderkopf 2 gelagerte Nockenwelle 4 geöffnet und geschlossen werden. Bei dem hier dargestellten Ausführungsbeispiel ist für die Einlaßseite und die Auslaßseite jeweils eine eigene Nockenwelle vorgesehen. Die Gaswechselventile und Nockenwelle an der Einlaßseite werden im folgenden mit 3a bzw. 4a, die korrespondierenden Elemente an der Auslaßseite hingegen mit 3b und 4b bezeichnet.The internal combustion engine 1 comprises a cylinder block with one at this In the cylinder head 2 is attached in a conventional manner Variety of gas exchange valves 3 was added, indirectly via an on the Cylinder head 2 stored camshaft 4 are opened and closed. In which embodiment shown here is for the inlet side and the outlet side each provided its own camshaft. The gas exchange valves and Camshaft on the inlet side are referred to below with 3a and 4a, respectively Corresponding elements on the outlet side, however, with 3b and 4b designated.

    Zwischen den Gaswechselventilen 3a und der Nockenwelle 4a der Einlaßseite ist eine Vorrichtung zur vollvariablen Hubverstellung 5 funktional eingegliedert, über die die Luftzufuhr zu den Zylindern in dem Zylinderblock gesteuert wird. Die Vorrichtung zur Hubverstellung 5 ermöglicht die Einsparung einer unter Umständen benötigten Drosselklappe. Die Vorrichtung zur vollvariablen Hubverstellung 5 wird in der EP 1 143 118 A2 näher erläutert, deren Inhalt hier insoweit miteinbezogen wird.Between the gas exchange valves 3a and the camshaft 4a of the intake side is a device for fully variable stroke adjustment 5 functionally incorporated, via the air supply to the cylinders in the cylinder block is controlled. The Device for stroke adjustment 5 allows the saving of a possible circumstances required throttle. The device for fully variable stroke adjustment 5 is in EP 1 143 118 A2 explained in more detail, the contents of which included here so far becomes.

    Wie Figur 1 zeigt, weist die Vorrichtung zur Hubverstellung 5 für jedes Gaswechselventil 3a einen am Zylinderkopf 2 gelagerten Schwenkhebel 6 auf, der mit seinem unteren Ende auf ein mit dem Gaswechselventil 3 in Eingriff stehendes Übertragungselement 7 drückt. Durch eine Veränderung des Eingriffspunktes zwischen dem Schwenkhebel 6 und dem Übertragungselement 7, die aus einer Verschwenkung des Schwenkhebels 6 resultiert, läßt sich der Hub der Gaswechselventile 3a verstellen. Eine Verschwenkung des Schwenkhebels 6 wird über eine mit einem oberen Endabschnitt des Schwenkhebels 6 in Eingriff stehende Exzenterwelle 8 vorgenommen, die über einen hier nicht näher dargestellten Stellmotor angetrieben wird. Zur Erfassung der aktuellen Drehstellung der Exzenterwelle 8 ist zusätzlich ein Drehwinkelgeber vorgesehen, der über eine Steuerungseinrichtung mit dem Stellmotor zusammenwirkt.As Figure 1 shows, the stroke adjustment device 5 for each Gas exchange valve 3a a mounted on the cylinder head 2 pivot lever 6, the with its lower end on a with the gas exchange valve 3 in engagement Transmission element 7 presses. By changing the point of intervention between the pivot lever 6 and the transmission element 7, which consists of a Pivoting the pivot lever 6 results, can the hub of Adjust gas exchange valves 3a. A pivoting of the pivot lever 6 is via a with an upper end portion of the pivot lever 6 in engagement Eccentric shaft 8 made, via a not shown here Actuator is driven. To capture the current rotational position of the Eccentric shaft 8 is additionally provided a rotary encoder, which has a Control device cooperates with the servomotor.

    Die eigentliche Öffnungs- und Schließbewegung der Gaswechselventile 3a wird über die Nockenwelle 4a bewirkt, die seitlich neben den Schwenkhebeln 6 verläuft. Wie Figur 1 zeigt, erfolgt der Eingriff von Nocken 9 der Nockenwelle 4a mit den Schwenkhebeln 6 über an diesen drehbar gelagerten Rollen. Bei einer Betrachtung im Querschnitt entsprechend Figur 1 greift die Nockenwelle 4a an einer der Exzenterwelle 8 gegenüberliegenden Seite an den Schwenkhebeln 6 an. Dabei liegt die Nockenwelle 4a in Vertikalrichtung etwas unterhalb der Exzenterwelle 8 und oberhalb der Übertragungshebel 7 neben der Vorrichtung zur Hubverstellung 5. Kulissenführungen 10 stützen den Schwenkhebel 6 über weitere, an dem Schwenkhebel 6 gelagerten Rollen nach oben hinab. Die Kulissenführungen 10 werden in der DE 102 35 400.6 näher erläutert, deren Inhalt insoweit hier miteinbezogen wird.The actual opening and closing movement of the gas exchange valves 3a effected via the camshaft 4 a, which extends laterally next to the pivoting levers 6. As Figure 1 shows, the engagement of cam 9 of the camshaft 4a with the Swing levers 6 on these rotatably mounted rollers. At a glance in cross-section corresponding to Figure 1, the camshaft 4a engages one of Eccentric shaft 8 opposite side of the pivot levers 6. It lies the camshaft 4 a in the vertical direction slightly below the eccentric shaft 8 and above the transmission lever 7 next to the device for stroke adjustment. 5 Slotted guides 10 support the pivot lever 6 on more, on the Swivel lever 6 stored rollers down to the top. The slide guides 10 are explained in more detail in DE 102 35 400.6, the contents of which here is involved.

    Der Zylinderkopf 2 ist einschließlich der an diesem gelagerten Wellen 4a, 4b und 8 sowie der Hubverstellvorrichtung 5 durch einen Zylinderkopfdeckel 11 nach oben abgedichtet. Geeignete Dichtflansche 13 und 14 an dem Zylinderkopf 2 und dem Zylinderkopfdeckel 11 verlaufen in einer gemeinsamen Teilungsebene 12 und sind miteinander durch Bolzen 15 verspannt.The cylinder head 2 is including the shafts 4 a, 4 b and 8 mounted thereon and the Hubverstellvorrichtung 5 by a cylinder head cover 11 upwards sealed. Suitable sealing flanges 13 and 14 on the cylinder head 2 and the Cylinder head cover 11 extend in a common division plane 12 and are clamped together by bolts 15.

    An dem Zylinderkopf 2 befinden sich mehrere Lager 16 für die Einlaß-Nockenwelle 4a. Diese Nockenwellenlager 16 sind geteilt und erheben sich über die Teilungsebene 12 zwischen dem Zylinderkopf 2 und dem Zylinderkopfdeckel 11, so daß diese bei abgenommenem Zylinderkopfdeckel 11 von der Seite her gut zugänglich sind. Die geteilten Nockenwellenlager 16 weisen jeweils einen Lagerschalenabschnitt 17 auf, der integral mit einem an dem Zylinderkopf 2 vorgesehenen Wellenträger 18 ausgebildet ist. Ein weiterer Lagerschalenabschnitt 19 ist an einem Lagerdeckel 20 ausgebildet, der mit dem Wellenträger 18 über Bolzen 21 verspannt ist.On the cylinder head 2 are a plurality of bearings 16 for the intake camshaft 4a. These camshaft bearings 16 are divided and rise above the Division plane 12 between the cylinder head 2 and the cylinder head cover 11, so that these with removed cylinder head cover 11 from the side well are accessible. The split camshaft bearing 16 each have one Bearing shell portion 17 which is integral with one on the cylinder head. 2 provided shaft carrier 18 is formed. Another bearing shell section 19 is formed on a bearing cap 20 which communicates with the shaft carrier 18 via Bolt 21 is braced.

    Eine Besonderheit der Anordnung der Lagerdeckel 20 besteht in der im wesentlichen senkrechten Ausrichtung der zugehörigen Lager-Teilungsebene 22 zu der Teilungsebene 12 zwischen dem Zylinderkopf 2 und dem Zylinderkopfdeckel 11. Damit sind Abweichungen von bis zu 20 Grad gegenüber einer streng senkrechten Ausrichtung miteingeschlossen. Vorzugsweise bleibt die Abweichung jedoch kleiner als etwa 5 bis 10 Grad. Bei dem Ausführungsbeispiel in Figur 1 mit rechtwinkliger Anordnung der Teilungsebenen 12 und 22 bedeutet dies, daß die Teilungsebene 22 zwischen dem Lagerdeckel 20 und dem Wellenträger 18 des Zylinderkopfes 2 im wesentlichen vertikal, die Teilungsebene 12 zwischen dem Zylinderkopf 2 und dem Zylinderkopfdeckel 11 hingegen im wesentlichen horizontal verläuft.A special feature of the arrangement of the bearing cap 20 is in the substantial vertical alignment of the associated bearing dividing plane 22 to the dividing plane 12 between the cylinder head 2 and the cylinder head cover 11. This makes deviations of up to 20 degrees from one severe vertical orientation included. Preferably, the deviation remains but less than about 5 to 10 degrees. In the embodiment in Figure 1 with rectangular arrangement of the dividing planes 12 and 22, this means that the Dividing plane 22 between the bearing cap 20 and the shaft support 18 of the Cylinder head 2 substantially vertically, the dividing plane 12 between the Cylinder head 2 and the cylinder head cover 11, however, substantially horizontal runs.

    Die Befestigungsbolzen 21 für die Lagerdeckel 20 bzw. deren Spannrichtungen verlaufen senkrecht zu der Teilungsebene 22 zwischen dem Lagerdeckel 20 und dem Träger 18. Dies ermöglicht eine sehr gleichmäßige Belastung der Nockenwellenlager 16 sowie der zugehörigen Spannelemente, da die Reaktionskräfte aus dem Eingriff zwischen den Nocken 9 und den Rollen an den Schwenkhebeln 6 gut auf die beidseitig der Nockenwelle 4 angeordneten Befestigungsbolzen 21 verteilt werden.The fastening bolts 21 for the bearing cap 20 and their clamping directions are perpendicular to the dividing plane 22 between the bearing cap 20 and the carrier 18. This allows a very even load on the Camshaft bearing 16 and the associated clamping elements, as the Reaction forces out of engagement between the cam 9 and the rollers to the Swing levers 6 well arranged on both sides of the camshaft 4 Fixing bolts 21 are distributed.

    Auch montagetechnisch bietet die senkrechte bzw. vertikale Anordnung der Teilungsebene 22 Vorteile, da die Lagerdeckel 20 bei bereits montierter Hubverstellvorrichtung 5 ohne eine Demontage desselben angebracht oder abgenommen werden können. Auf diese Weise wird eine Flexibilisierung der Montage erzielt, da die Nockenwelle 4 sowohl vor als auch nach der Montage der Hubverstellvorrichtung 5 eingebaut werden kann. Überdies läßt sich die Nockenwelle 4 im Bedarfsfall unabhängig von der Hubverstellvorrichtung 5 austauschen. Also montagetechnisch offers the vertical or vertical arrangement of Teilungssebene 22 advantages, since the bearing cap 20 already mounted Hubverstellvorrichtung 5 without dismantling the same attached or can be removed. In this way, a flexibilization of the Assembly achieved because the camshaft 4 both before and after installation of the Hubverstellvorrichtung 5 can be installed. Moreover, the Camshaft 4, if necessary, regardless of the Hubverstellvorrichtung. 5 change.

    Wie Figur 1 weiter entnommen werden kann, sind auch die Lager 23 der Exzenterwelle 8 über der Teilungsebene 12 zwischen dem Zylinderkopf 2 und dem Zylinderkopfdeckel 11 angeordnet.As Figure 1 can be further removed, the bearings 23 of the Eccentric shaft 8 above the dividing plane 12 between the cylinder head 2 and the Cylinder head cover 11 is arranged.

    Die Lagerung der Exzenterwelle 8 erfolgt an dem Wellenträger 18 an der der Einlaß-Nockenwelle 4a gegenüberliegenden Seite in im wesentlichen senkrecht geteilten Exzenterwellenlagern 23. Die Exzenterwellenlager 23 umfassen jeweils einen an dem Wellenträger 18 ausgebildeten Lagerschalenabschnitt 26 sowie einen mit dem Lagerschalenabschnitt 26 durch Befestigungsorgane 24 verspannten Lagerdeckel 27, der seinerseits ebenfalls eine Lagerschale 29 ausbildet. Die Teilungsebene 28 der Exzenterwellenlager 23 verläuft somit im wesentlichen parallel zu der Teilungsebene 22 der Nockenwellenlager 16. So wird auch auf Seiten der Exzenterwelle 8 eine gleichmäßige Belastung in dem Befestigungsorgan 24 für die Lagerdeckel 27 erzielt. Zudem sind die Lagerdeckel 27 von der Seite her gut an dem Wellenträger 18 montierbar, und zwar unabhängig von der Montage der Nockenwelle 4a und der Kulissenführung 10.The bearing of the eccentric shaft 8 takes place on the shaft support 18 at the Inlet camshaft 4a opposite side in substantially vertical divided eccentric shaft bearings 23. The eccentric shaft bearings 23 each comprise a formed on the shaft support 18 bearing cup portion 26 and a braced with the bearing shell portion 26 by fastening members 24 Bearing cover 27, which in turn also forms a bearing shell 29. The Division plane 28 of the eccentric shaft bearing 23 thus extends substantially parallel to the dividing plane 22 of the camshaft bearing 16. So is also on Side of the eccentric shaft 8 a uniform load in the attachment member 24 scored for the bearing cap 27. In addition, the bearing cap 27 from the side good at the shaft support 18 can be mounted, regardless of the mounting of the Camshaft 4a and the slide guide 10th

    Die vertikale Teilung der Nockenwellenlager 16 und der Exzenterwellenlager 23 verringert darüber hinaus die Montagetoleranz. Dies wirkt sich positiv auf die Gleichverteilung der Hübe der Gaswechselventile 3a aus. Zudem erlaubt diese Anordnung eine zylinderselektive Gleichverteilungsreparatur.The vertical pitch of the camshaft bearing 16 and the eccentric shaft 23rd also reduces the mounting tolerance. This has a positive effect on the Uniform distribution of the strokes of the gas exchange valves 3a. In addition, this allows Arrangement of a cylinder-selective DC distribution repair.

    Der Wellenträger 18 ist bei dem Ausführungsbeispiel integral mit dem Zylinderkopf 2 ausgebildet. Es ist jedoch auch möglich, einen separaten Wellenträger 18 zu verwenden, der an dem Zylinderkopf 2 lösbar befestigt wird. Wird ein separater Wellenträger 18 verwendet, so kann dieser mit dem Zylinderkopf 2 zusammen endbearbeitet werden.The shaft carrier 18 is integral with the cylinder head in the embodiment 2 trained. However, it is also possible to use a separate shaft carrier 18 use, which is releasably secured to the cylinder head 2. Will be a separate one Used shaft carrier 18, so this can with the cylinder head 2 together be finished.

    An dem Wellenträger 18 sind zusätzlich zu den bereits erwähnten Kulissenführungen 10 weiterhin ein Stellmotor und ein Drehwinkelgeber für die Exzenterwelle 8 befestigt, über den durch eine Verstellung der Exzenterwelle 8 der Hub an den Gaswechselventilen 3a reguliert wird. On the shaft support 18 are in addition to those already mentioned Slotted guides 10 continue to be a servomotor and a rotary encoder for Eccentric shaft 8 attached, via which by an adjustment of the eccentric shaft 8 of Hub is regulated at the gas exchange valves 3a.

    Überdies können in dem Wellenträger 18 Schmiermittelkanäle ausgebildet werden, die mit weiteren Schmiermittelkanälen in dem Zylinderkopf 2 verbunden sind und die Nockenwellenlager 16 und Exzenterwellenlager 23 mit Schmiermittel versorgen. Dabei können an dem Wellenträger 18 auf die Nocken 9 der Nockenwelle 4 gerichtete Schmiermitteldüsen zur Spritzkühlung der Nocken 9 vorgesehen werden.Moreover, in the shaft carrier 18 lubricant channels can be formed, which are connected to other lubricant channels in the cylinder head 2 and provide lubricant to the camshaft bearings 16 and eccentric shaft bearings 23. It can be on the shaft support 18 on the cam 9 of the camshaft. 4 directed lubricant nozzles are provided for spray cooling of the cam 9.

    Die Auslaß-Nockenwelle 4b ist in einer Lagerleiste 30 gelagert und bildet mit dieser zusammen eine Einheit, die insgesamt neben der Exzenterwelle 8 an dem Zylinderblock 2 befestigt wird. Auf diese Weise läßt sich die Auslaß-Nockenwelle 4b im Bedarfsfall einfach demontieren. Insbesondere wird hierdurch eine gute Zugänglichkeit der Exzenterwelle 8 bzw. der Exzenterwellenlager 23 gewährleistet. Wie Figur 1 zeigt, ist auch die Lagerleiste 30 in der Teilungsebene 12 an dem Zylinderkopf 2 befestigt. Da deren Befestigung jedoch von oben erfolgt, ist es auch denkbar, die Lagerleiste 30 teilweise in dem Zylinderkopf 2 zu versenken. Anstelle einer Lagerleiste 30 kann für die Auslaß-Nockenwelle 4b jedoch im Prinzip auch eine herkömmliche Lagerung mit Lagerschalenabschnitten an dem Zylinderkopf und separaten Lagerdeckeln vorgesehen werden.The outlet camshaft 4b is mounted in a bearing strip 30 and forms with this together a unit, the total next to the eccentric shaft 8 at the Cylinder block 2 is attached. In this way, the exhaust camshaft 4b if necessary simply disassemble. In particular, this is a good Accessibility of the eccentric shaft 8 and the eccentric shaft 23 ensures. As Figure 1 shows, and the bearing block 30 in the parting plane 12 at the Cylinder head 2 attached. However, since their attachment is made from above, so it is conceivable to partially sink the bearing strip 30 in the cylinder head 2. Instead of However, a bearing bar 30 can for the exhaust camshaft 4b in principle also a conventional storage with bearing shell sections on the cylinder head and separate bearing caps are provided.

    Die Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. Dieses dient lediglich zum Zweck der Erläuterung des Prinzips einer vertikalen Teilung der Nockenwellenlager 16 und/oder Exzenterwellenlager 23.The invention is not limited to the embodiment described above limited. This is merely for the purpose of explaining the principle of vertical pitch of the camshaft bearing 16 and / or eccentric shaft 23rd

    So kann in einer Abwandlung des Ausführungsbeispiels zur Betätigung der Gaswechselventile 3 beispielsweise lediglich eine Nockenwelle 4 verwendet werden. Denkbar ist auch eine eigene Exzenterwelle für jede Nockenwelle 4a bzw. 4b. Weitere Abwandlungen im Rahmen der beigefügten Ansprüche, die den Umfang der Erfindung definieren, sind möglich.Thus, in a modification of the embodiment for actuating the Gas exchange valves 3, for example, only a camshaft 4 used become. Also conceivable is a separate eccentric shaft for each camshaft 4a or 4b. Further modifications within the scope of the appended claims, which Defining scope of the invention are possible.

    In sämtlichen Fällen ergibt sich eine Verbrennungskraftmaschine mit vollvariabler Hubverstellung der Gaswechselventile, die sich durch einen optimierten Kraftfluß verbunden mit einer hohen Steifigkeit im Bereich des Zylinderkopfes und der Hubverstellvorrichtung sowie durch günstige Montageeigenschaften auszeichnet.

    1
    Verbrennungskraftmaschine
    2
    Zylinderkopf
    3
    Gaswechselventil
    3a
    Einlaß-Gaswechselventil
    3b
    Auslaß-Gaswechselventil
    4
    Nockenwelle
    4a
    Einlaß-Nockenwelle
    4b
    Auslaß-Nockenwelle
    5
    Hubverstellvorrichtung
    6
    Schwenkhebel
    7
    Übertragungselement
    8
    Exzenterwelle
    9
    Nocken der Nockenwelle
    10
    Kulissenführung
    11
    Zylinderkopfdeckel
    12
    Teilungsebene
    13
    Dichtflansch
    14
    Dichtflansch
    15
    Bolzen
    16
    Nockenwellenlager
    17
    Lagerschalenabschnitt
    18
    Wellenträger
    19
    Lagerschalenabschnitt
    20
    Lagerdeckel des Nockenwellenlagers 16
    21
    Befestigungsbolzen (Spannelement)
    22
    Teilungsebene des Nockenwellenlagers
    23
    Exzenterwellenlager
    24
    Befestigungsorgan
    26
    Lagerschalenabschnitt
    27
    Lagerdeckel des Exzenterwellenlagers 23
    28
    Teilungsebene des Exzenterwellenlagers
    29
    Lagerschalenabschnitt
    30
    Lagerleiste
    In all cases, there is an internal combustion engine with fully variable stroke adjustment of the gas exchange valves, which is characterized by an optimized power flow associated with a high rigidity in the area of the cylinder head and the Hubverstellvorrichtung and by favorable mounting properties.
    1
    Internal combustion engine
    2
    cylinder head
    3
    Gas exchange valve
    3a
    Intake gas-exchange valve
    3b
    Exhaust gas-exchange valve
    4
    camshaft
    4a
    Intake camshaft
    4b
    Exhaust camshaft
    5
    stroke adjusting
    6
    pivoting lever
    7
    transmission element
    8th
    eccentric shaft
    9
    Cam of the camshaft
    10
    link guide
    11
    Cylinder head cover
    12
    parting plane
    13
    sealing flange
    14
    sealing flange
    15
    bolt
    16
    camshaft bearings
    17
    Bush section
    18
    wave carrier
    19
    Bush section
    20
    Bearing cover of camshaft bearing 16
    21
    Fixing bolt (clamping element)
    22
    Division plane of the camshaft bearing
    23
    eccentric shaft bearing
    24
    fixture
    26
    Bush section
    27
    Bearing cover of the eccentric shaft bearing 23
    28
    Division plane of the eccentric shaft bearing
    29
    Bush section
    30
    bearing strip

    Claims (10)

    1. An internal combustion engine with stroke adjustment of the gas change valves, comprising:
      a camshaft (4);
      a device (5) for adjusting the stroke of a gas change valve (3) disposed near the camshaft (4) and co-operating therewith,
      a cylinder head (2) with at least one divided bearing (16) for the camshaft (4); and
      a cylinder-head cover (11) which when assembled covers the cylinder head (2), wherein
      the divided camshaft bearings (16) on the cylinder head (2) extend outwards over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11) and the dividing plane (12) between the divided camshaft bearings (16) extends substantially perpendicular to the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11) and wherein
      the cylinder head (2) comprises a shaft-holder (18) and a divided camshaft bearing (16) which comprises a bearing cover (20) clamped against the shaft-holder, wherein a bearing-shell portion (17, 19) is provided on the shaft-holder (18) and on the bearing cover (20) respectively and both the shaft-holder (18) and the cover (20) of the camshaft bearing (16) project over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11),
      characterised in that the stroke-adjusting device (5) comprises pivoted levers (6) for operating the gas change valves (3) in a stroke, the levers being operated by cams (9) on the camshaft (4), and also comprises an eccentric shaft (8) which pivots the levers (6) to adjust the stroke of the associated gas change valve (3), wherein divided bearings (23) are provided on the cylinder head (2) for the eccentric shaft (8), their dividing plane extending substantially at right angles to the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11), and wherein the eccentric-shaft bearings (23) project outwards over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11).
    2. An internal combustion engine according to claim 1, characterised in that the shaft-holder (18) is formed integrally with the cylinder head (2).
    3. An internal combustion engine according to claim 1, characterised in that the shaft-holder (18) is releasably connected to the cylinder head (2).
    4. An internal combustion engine according to any of claims 1 to 3, characterised in that a divided eccentric-shaft bearing (23) comprises a bearing-cover (27) clamped against the shaft-holder, wherein a bearing-shell portion is provided on the shaft-holder (18) and on the bearing cover (27) respectively and both the shaft-holder (18) and the cover (27) of the eccentric-shaft bearing (23) project over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11).
    5. An internal combustion engine with stroke adjustment of the gas change valves, comprising
      a camshaft (4);
      a device (5) for adjusting the stroke of a gas change valve (3) comprising a pivoting lever (6) actuated by the camshaft (4) for operating the gas change valve (3) in a stroke and also comprising an eccentric shaft (8) which pivots the pivoted lever (6) for adjusting the stroke of the associated gas change valve (3);
      a cylinder head (2) with at least one divided bearing (16) for the camshaft (4), and
      a cylinder-head cover (11) which covers the cylinder head (2) when assembled, characterised in that
      divided eccentric-shaft bearings (23) are provided on the cylinder head (2) and project outwards over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11) and their dividing plane extends substantially perpendicular to the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11) and
      the cylinder head (2) comprises a shaft-holder (18) and a divided eccentric-shaft bearing (23) comprises a bearing cover (27) clamped against the shaft-holder (18), wherein a bearing-shell portion is provided on the shaft-holder (18) and on the bearing cover (27) respectively and both the shaft-holder (18) and the cover (27) of the eccentric-shaft bearing (23) project over the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11) and
      a slotted guide (10) is fastened to the shaft-holder (18) and braces the pivoted lever (6) at right angles to the dividing plane (12) between the cylinder head (2) and the cylinder-head cover (11).
    6. An internal combustion engine according to any of claims 1 to 5, characterised in that the covers (20, 27) for the camshaft bearing (16) and the eccentric-shaft bearing (23) are disposed on opposite sides of the shaft-holder (18).
    7. An internal combustion engine according to any of claims 1 to 6, characterised in that a servomotor and an angle-rotation sensor for the eccentric shaft (8) are fastened to the shaft-holder (18).
    8. An internal combustion engine according to any of claims 1 to 7, characterised in that lubricant ducts are formed in the shaft-holder (18) and supply lubricant to the camshaft bearings (16) and the eccentric-shaft bearings (23).
    9. An internal combustion engine according to claim 9, characterised in that directed lubricant nozzles for spray-cooling the cams (9) are provided on the shaft-holder (18) on the cams (9) on the camshaft (4).
    10. An internal combustion engine according to any of claims 1 to 9, characterised in that a second camshaft (4b) is provided parallel with the first camshaft (4a), wherein the second camshaft (4b) is mounted in a bearing strip (30) which is disposed near the shaft-holder (18) and releasably fastened to the cylinder head (2).
    EP04000305A 2003-02-04 2004-01-09 Internal combustion engine with valve lift adjustment Expired - Lifetime EP1445434B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10304304 2003-02-04
    DE10304304A DE10304304A1 (en) 2003-02-04 2003-02-04 Internal combustion engine with stroke adjustment of the gas exchange valves

    Publications (2)

    Publication Number Publication Date
    EP1445434A1 EP1445434A1 (en) 2004-08-11
    EP1445434B1 true EP1445434B1 (en) 2005-10-26

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04000305A Expired - Lifetime EP1445434B1 (en) 2003-02-04 2004-01-09 Internal combustion engine with valve lift adjustment

    Country Status (2)

    Country Link
    EP (1) EP1445434B1 (en)
    DE (2) DE10304304A1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102011088994A1 (en) 2011-12-19 2013-06-20 Bayerische Motoren Werke Aktiengesellschaft Variable-stroke valve train for cylinder head of internal combustion engine, has cam shaft and eccentric shaft that are mounted on common shaft support mounted or integrated to support element which is fitted in cylinder head

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102005040959A1 (en) * 2005-08-30 2007-03-08 Bayerische Motoren Werke Ag Hubvariabler valve drive for an internal combustion engine
    JP2011080384A (en) 2009-10-05 2011-04-21 Otics Corp Vehicle engine

    Family Cites Families (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2412457A (en) * 1941-08-25 1946-12-10 Laurence D Harrison Valve actuating mechanism
    DE1272623B (en) * 1965-02-04 1968-07-11 Motoren Werke Mannheim Ag Camshaft and valve tappet bearings on the cylinder block of multi-cylinder internal combustion engines
    JPS6318109A (en) * 1986-07-09 1988-01-26 Honda Motor Co Ltd Valve actuator for internal combustion engine
    US6167856B1 (en) * 1992-11-12 2001-01-02 Ford Global Technologies, Inc. Low friction cam shaft
    DE19548389A1 (en) * 1995-12-22 1997-06-26 Siemens Ag Adjustment device for the stroke of a gas exchange valve of an internal combustion engine
    DE19920512A1 (en) * 1999-05-05 2000-11-09 Opel Adam Ag Device for actuating a valve with a variable stroke on internal combustion engines
    JP4396024B2 (en) * 2000-03-13 2010-01-13 マツダ株式会社 Cylinder head structure
    DE10106921A1 (en) * 2001-02-15 2002-08-22 Bayerische Motoren Werke Ag Method for synchronizing the filling of cylinders of an internal combustion engine, in particular a reciprocating piston internal combustion engine
    DE10123186A1 (en) * 2001-05-12 2002-11-14 Bayerische Motoren Werke Ag Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102011088994A1 (en) 2011-12-19 2013-06-20 Bayerische Motoren Werke Aktiengesellschaft Variable-stroke valve train for cylinder head of internal combustion engine, has cam shaft and eccentric shaft that are mounted on common shaft support mounted or integrated to support element which is fitted in cylinder head

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    DE10304304A1 (en) 2004-08-19
    DE502004000110D1 (en) 2005-12-01
    EP1445434A1 (en) 2004-08-11

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