DE102009022657A1 - Camshaft for valve train of internal-combustion engine, has cam carrier axially supported on base shaft in relocatable manner and comprising internal teeth cooperated with external teeth, where teeth are made of fiber-reinforced plastic - Google Patents
Camshaft for valve train of internal-combustion engine, has cam carrier axially supported on base shaft in relocatable manner and comprising internal teeth cooperated with external teeth, where teeth are made of fiber-reinforced plastic Download PDFInfo
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- DE102009022657A1 DE102009022657A1 DE102009022657A DE102009022657A DE102009022657A1 DE 102009022657 A1 DE102009022657 A1 DE 102009022657A1 DE 102009022657 A DE102009022657 A DE 102009022657A DE 102009022657 A DE102009022657 A DE 102009022657A DE 102009022657 A1 DE102009022657 A1 DE 102009022657A1
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- cam carrier
- cam
- internal
- teeth
- camshaft
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Classifications
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- 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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
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- 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
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- 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
- F01L1/08—Shape of cams
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- 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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Die Erfindung betrifft eine Nockenwelle für Brennkraftmaschinen, insbesondere für einen Ventiltrieb einer Brennkraftmaschine, mit einer Grundwelle, die mindestens eine Außenverzahnung aufweist, und mit mindestens einem wenigstens eine mit der Außenverzahnung zusammenwirkende Innenverzahnung aufweisenden, axial auf der Grundwelle verschieblich gelagerten Nockenträger.The Invention relates to a camshaft for internal combustion engines, in particular for a valve drive of an internal combustion engine, with a fundamental, the at least one external toothing and at least one with at least one external toothing interacting internal teeth, axially on the fundamental shaft slidably mounted cam carrier.
Ferner betrifft die Erfindung ein Verfahren zur Herstellung einer Nockenwelle, insbesondere wie sie oben beschrieben wurde, mit einer Grundwelle, die mindestens eine Außenverzahnung aufweist, und mit mindestens einem wenigstens eine mit der Außenverzahnung zusammenwirkende Innenverzahnung aufweisenden, axial auf der Grundwelle verschieblich gelagerten Nockenträger.Further the invention relates to a method for producing a camshaft, especially as described above, with a fundamental wave, having at least one outer toothing, and at least an at least one cooperating with the external toothing Internal teeth having axially displaceably mounted on the fundamental shaft Cam support.
Nockenwellen der eingangs genannten Art sind aus dem Stand der Technik bekannt. Sie bestehen im Wesentlichen aus einer Grundwelle, auf welcher ein Nockenträger, der wie der Name bereits sagt, einen oder mehrere Nockenelemente trägt, axial verschieblich gelagert ist. Wobei die Grundwelle mindestens eine Außenverzahnung aufweist, die mit wenigstens einer Innenverzahnung des Nockenträgers zusammenwirkt, sodass die Drehbewegung der Grundwelle formschlüssig auf den Nockenträger übertragen wird. Üblicherweise sind die Außenverzahnung und die Innenverzahnung einstückig mit der Grundwelle beziehungsweise mit dem Nockenträger ausgebildet, die wiederum metallisch sind, und bei der Herstellung durch aufwendigen Dreh- und/oder Fräsprozessen (heraus-)geformt. Insbesondere das Erstellen der Innenverzahnung ist ein aufwendiger Prozess.camshafts of the type mentioned are known from the prior art. They essentially consist of a fundamental wave on which a Cam carrier, which as the name implies, one or carries several cam elements, mounted axially displaceable is. Where the fundamental wave at least one external toothing having, with at least one internal toothing of the cam carrier cooperates, so that the rotational movement of the fundamental wave form-fitting is transferred to the cam carrier. Usually the external teeth and the internal teeth are integral formed with the fundamental wave or with the cam carrier, which in turn are metallic, and in the production by consuming Turning and / or milling processes (shaped out). Especially The creation of internal teeth is a complex process.
Die
Die erfindungsgemäße Nockenwelle zeichnet sich dadurch aus, dass die Außenverzahnung und/oder die Innenverzahnung aus Kunststoff gefertigt sind. Kunststoff lässt sich im Allgemeinen sehr, viel einfacher bearbeiten als Metall und lässt sich darüber hinaus bereits in der gewünschten Endform auf einfache Art und Weise herstellen beziehungsweise ur-formen. So können die Außenverzahnung und die Innenverzahnung beispielsweise vorab hergestellt und anschließend in der gewünschten Position an dem entsprechenden Bauteil befestigt werden. Hierzu können entsprechende Aufnahmenuten oder Ähnliches dienen. Ein weiterer Vorteil der aus Kunststoff gebildeten Außenverzahnung und/oder Innenverzahnung liegt darin, dass die Geräuschentwicklung des Ventiltriebs beziehungsweise der Brennkraftmaschine mit einer derartigen Nockenwelle verringert wird, da sich der Kunststoff als Dämpfungsmaterial eignet und entsprechend als Eigendämpfung der Nockenwelle fungiert.The inventive camshaft is characterized from that the external toothing and / or the internal toothing are made of plastic. Plastic can be in Generally very, much easier than metal and leaves Beyond that, already in the desired Make final shape in a simple manner or ur-form. So can the external toothing and the internal toothing For example, prepared in advance and then in the desired position attached to the corresponding component become. For this purpose, corresponding grooves or the like serve. Another advantage of the external teeth formed from plastic and / or internal teeth is that the noise the valve train or the internal combustion engine with a such camshaft is reduced, since the plastic as Damping material is suitable and as self-damping the camshaft acts.
Vorteilhafterweise ist der Nockenträger ebenfalls aus Kunststoff gefertigt. Dadurch wird zum Einen das Gewicht des Nockenträgers insgesamt verringert und zum Anderen kann der Nockenträger als solcher leichter und kostengünstiger hergestellt werden. Der verschiebbare Nockenträger weist zweckmäßigerweise in seiner Mantelfläche mindestens eine schräg verlaufende Nut auf, in welche ein ortsfester Steuerbolzen eines Ventiltriebs eingreifen kann. Liegt der Steuerbolzen in der Nut ein, beziehungsweise wird er im Betrieb in die Nut eingebracht, so bewirkt dies eine axiale Verlagerung des Nockenträgers auf der Grundwelle, wenn diese gedreht wird. Dadurch kann im Betrieb die ein Ventil betätigende Nockenkontur durch axiales Verschieben des Nockenträgers auf einfache Art und Weise gewechselt werden, wodurch die sogenannte Ventilhubkurve verändert wird. Diese für das axiale Verschieben notwendige Nut lässt sich sehr viel einfacher bei der Herstellung des Nockenträgers aus Kunststoff realisieren. Insbesondere kann die Nut bereits beim Ur-Formen und nicht wie sonst, erst beim Nachbearbeiten des Nockenträgers hergestellt werden. Hierdurch ist es möglich, auch hochkomplexe Formen des Nockenträgers auf einfache Art und Weise zu realisieren.advantageously, the cam carrier is also made of plastic. As a result, on the one hand, the weight of the cam carrier is reduced overall and on the other hand, the cam carrier as such can be lighter and produced more cheaply. The movable one Cam carrier has expediently in its lateral surface at least one obliquely extending groove, in which a stationary control pin a Valve drive can intervene. Is the control bolt in the groove a, or he is introduced in operation in the groove, so this causes an axial displacement of the cam carrier on the fundamental, when this is turned. This can be in operation the valve-actuating cam contour by axial displacement the cam carrier are changed in a simple way, whereby the so-called valve lift curve is changed. These for the axial displacement necessary groove leaves Much easier in the production of the cam carrier made of plastic. In particular, the groove may already be at the ur-shaping and not as usual, only when reworking the cam carrier getting produced. This makes it possible, even highly complex Forming the cam carrier in a simple manner.
Besonders bevorzugt ist die Innenverzahnung einstückig mit dem Nockenträger ausgebildet. Somit wird die Innenverzahnung gleichzeitig mit dem Nockenträger hergestellt und muss nicht wie oben beschrieben im Nachhinein daran befestigt werden. Dadurch wird die Stabilität des Nockenträgers erhöht sowie eine hohe Lebensdauer gewährleistet. Außerdem wird dadurch die Geräuschentwicklung weiter verringert.Especially Preferably, the internal toothing is integral with the cam carrier educated. Thus, the internal toothing is simultaneous with the cam carrier made and does not need to be as described above in retrospect be attached. This will increase the stability of the cam carrier increases and ensures a long service life. In addition, this is the noise further reduced.
Vorteilhafterweise sind die Außenverzahnung, die Innenverzahnung und/oder der Nockenträger aus Kunststoff gespritzt. Mit entsprechenden Formen lässt sich dadurch auf einfache Art und Weise das entsprechende Bauteil (Außenverzahnung, Innenverzahnung und/oder Nockenträger) fertigen.advantageously, are the external teeth, the internal teeth and / or the cam carrier is injection molded from plastic. With appropriate This makes it easy to do forms corresponding component (external toothing, internal toothing and / or cam carrier) manufacture.
Nach einer vorteilhaften Weiterbildung der Erfindung weist die Grundwelle mehrere Außenverzahnungen auf, wie sie oben beschrieben wurden, denen jeweils ein Nockenträger zugeordnet ist. Letztendlich kann eine beliebige Anzahl von Nockenträgern und/oder Außenverzahnungen an der Grundwelle vorgesehen sein. Natürlich ist es auch denkbar, dass die Grundwelle eine einzige, sich im Wesentlichen über die gesamte Länge der Grundwelle erstreckende Außenverzahnung aufweist, auf welcher mehrere Nockenträger mit ihrer Innenverzahnung axial verschiebbar sind.According to an advantageous embodiment of the invention, the fundamental wave has a plurality of external teeth, as described above, each associated with a cam carrier. Finally, any number of cam carriers and / or external gears may be provided on the fundamental shaft. Of course, it is also conceivable that the fundamental wave has a single, extending substantially over the entire length of the fundamental shaft external teeth, on which a plurality of cam carrier with its internal teeth are axially displaceable.
Vorteilhafterweise sind auf dem beziehungsweise jedem Nockenträger wenigstens zwei Nockenelemente drehfest angeordnet, wobei die Nockenelemente unterschiedliche Ventilhubkurven bilden.advantageously, are on the or each cam carrier at least two cam elements arranged rotationally fixed, wherein the cam elements form different valve lift curves.
Bevorzugt ist der Nockenträger aus Kunststoff dabei jeweils um die Nockenelemente gespritzt. Im einfachsten Fall können zwar die Nockenelemente auf den Nockenträger aufgeschoben werden, bevorzugt jedoch ist die entgegengesetzte Vorgehensweise vorgesehen. Dadurch ist es möglich, auch Nockenträgerformen zu schaffen, auf die normalerweise kein einstückig ausgebildetes Nockenelement aufgeschoben werden könnte. Beispielsweise kann der Nockenträger somit an seinen Stirnenden jeweils einen Axialanschlag für einen oder mehrere Nockenelemente aufweisen. Zweckmäßigerweise sind die Nockenelemente und/oder die Grundwelle aus Metall gefertigt.Prefers is the cam carrier made of plastic in each case around the Injected cam elements. In the simplest case, though the cam elements are pushed onto the cam carrier, however, preferably the opposite procedure is provided. This makes it possible, even cam carrier shapes to create, on which usually no one-piece trained Cam element could be postponed. For example The cam carrier can thus at his front ends respectively an axial stop for one or more cam elements exhibit. Conveniently, the cam elements and / or the fundamental wave made of metal.
Vorteilhafterweise ist der Kunststoff glas- und/oder kohlenstofffaserverstärkt ausgebildet. Bei hohen Drehzahlen und/oder hohen Beanspruchungen durch die zu betätigenden Ventile gewährleistet der Kunststoff eine ausreichende Stabilität der Nockenwelle. Alternativ oder zusätzlich ist der Kunststoff mit verschleißmindernden Zusätzen und/oder Gleit-/Schmiermittelzusätzen versehen, die die Reibkräfte verringern.advantageously, the plastic is glass and / or carbon fiber reinforced educated. At high speeds and / or high loads ensured by the valves to be operated of the Plastic sufficient stability of the camshaft. Alternatively or additionally, the plastic is wear-reducing Additives and / or lubricants / lubricant additives provided, which reduce the friction forces.
Weiterhin ist vorgesehen, dass die Außenverzahnung und der Nockenträger, insbesondere die Innenverzahnung des Nockenträgers, eine Presspassung bilden. Dadurch ist eine besonders direkte Kraftübertragung gewährleistet, und Vibrationen, die insbesondere zu einer unerwünschten Geräuschentwicklung führen könnten, werden verhindert beziehungsweise minimiert.Farther it is provided that the outer toothing and the cam carrier, in particular the internal toothing of the cam carrier, a Form press fit. This is a particularly direct power transmission guaranteed, and vibration, in particular to a lead to unwanted noise could be prevented or minimized.
Nach einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass die Zahnzwischenräume der Außenverzahnung und/oder der Innenverzahnung über ihre Längserstreckung hinweg unterschiedlich breit ausgebildet sind. Dadurch ist es insbesondere möglich, auch die Presspassung zwischen der Innenverzahnung und der Außenverzahnung zu beeinflussen, sodass in Bereichen, in denen die Zahnzwischenräume weiter auseinander sind, geringere Reibkräfte auftreten, als in Bereichen, in denen die Zahnzwischenräume kleiner ausgebildet sind.To an advantageous embodiment of the invention is provided that the interdental spaces of the external teeth and / or the internal toothing over its longitudinal extent are made of different widths. This makes it special possible, also the interference fit between the internal teeth and external teeth, so that in areas, in which the interdental spaces are farther apart, lower Frictional forces occur, as in areas where the interdental spaces are smaller.
Bevorzugt sind die Zahnzwischenräume in Bewegungsbereichen breiter ausgebildet als in Feststellbereichen. Unter dem Bewegungsbereich ist hierbei der Bereich zu verstehen, über welchen der jeweilige Nockenträger axial auf der Grundwelle verschoben wird, um in seine nächste Endlage zu gelangen, in welcher sich eines der Nockenelemente in einer Ventilbetätigungsposition befindet und (axial) möglichst fest sitzen soll. In diesem sogenannten Feststellbereich, sind die Zahnzwischenräume zweckmäßiger schmaler ausgebildet, um höherer Reibkräfte zu bewirken, die einen sicheren Sitz des Nockenträgers auf der Grundwelle gewährleisten. Dadurch ist der Nockenträger zum Einen an den gewünschten Positionen festsitzend auf der Grundwelle angeordnet, und kann zwischen zwei Feststellbereichen leicht und mit wenig Kraftaufwand über den Bewegungsbereich hinweg verschoben werden.Prefers the interdental spaces in areas of movement are wider trained as in detection areas. Under the movement area Here is the area to understand, over which the respective Cam carrier is moved axially on the fundamental shaft, to get to its next end position, in which itself one of the cam elements in a valve operating position located and (axially) should sit as firmly as possible. In this so-called detection area, the interdental spaces are more appropriate narrower trained to higher friction forces cause a secure fit of the cam carrier of the fundamental wave. This is the cam carrier on the one hand at the desired positions stuck on arranged the fundamental wave, and can be between two detection areas light and with little effort over the range of motion be postponed.
Das erfindungsgemäße Verfahren zur Herstellung der Nockenwelle sieht vor, dass die Außenverzahnung und/oder die Innenverzahnung aus Kunststoff, insbesondere durch Umspritzen gefertigt werden.The inventive method for producing the Camshaft provides that the external teeth and / or the internal toothing of plastic, in particular by encapsulation be made.
Im Folgenden soll die Erfindung anhand eines Ausführungsbeispiels näher erläutert werden. Dazu zeigenin the The invention is based on an embodiment be explained in more detail. Show this
Die
Die
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Die
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aus den
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BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Nockenwellecamshaft
- 22
- Grundwellefundamental wave
- 33
- Außenverzahnungexternal teeth
- 44
- Drehachseaxis of rotation
- 55
- Nockenträgercam support
- 66
- Innenverzahnunginternal gearing
- 77
- Axialanschlagaxial stop
- 88th
- Axialanschlagaxial stop
- 99
- Nockenelementcam member
- 1010
- Nockenelementcam member
- 1111
- Nockenelementcam member
- 1212
- Nockenelementcam member
- 1313
- Doppelpfeildouble arrow
- 1414
- Nutgroove
- 1515
- Nutgroove
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - EP 1608849 [0004] EP 1608849 [0004]
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102009022657A DE102009022657A1 (en) | 2009-05-26 | 2009-05-26 | Camshaft for valve train of internal-combustion engine, has cam carrier axially supported on base shaft in relocatable manner and comprising internal teeth cooperated with external teeth, where teeth are made of fiber-reinforced plastic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102009022657A DE102009022657A1 (en) | 2009-05-26 | 2009-05-26 | Camshaft for valve train of internal-combustion engine, has cam carrier axially supported on base shaft in relocatable manner and comprising internal teeth cooperated with external teeth, where teeth are made of fiber-reinforced plastic |
Publications (1)
Publication Number | Publication Date |
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DE102009022657A1 true DE102009022657A1 (en) | 2011-01-05 |
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DE102009022657A Withdrawn DE102009022657A1 (en) | 2009-05-26 | 2009-05-26 | Camshaft for valve train of internal-combustion engine, has cam carrier axially supported on base shaft in relocatable manner and comprising internal teeth cooperated with external teeth, where teeth are made of fiber-reinforced plastic |
Country Status (1)
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DE (1) | DE102009022657A1 (en) |
Cited By (22)
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DE102010004591A1 (en) | 2010-01-14 | 2011-07-21 | Audi Ag, 85057 | Cam carrier for valve train of combustion engine, has torque-proof and axially immoveable parts e.g. cam rings, link ring and inner bearing sleeve, mounted on pipe, where valve operating cams and shifting gate are formed at parts |
DE102011001711A1 (en) * | 2011-03-31 | 2012-10-04 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Valve train for internal combustion engine, has bearing sleeves fixed on side portions of sliding sleeve, and camshaft bearings axially displaceable with respect to bearing sleeves and rotatably mounted on camshaft |
WO2012167867A1 (en) * | 2011-06-08 | 2012-12-13 | Schaeffler Technologies Ag & Co Kg | Mounting of a camshaft |
WO2013001058A1 (en) | 2011-06-30 | 2013-01-03 | Thyssenkrupp Presta Teccenter Ag | Camshaft having an axially displaceable cam pack |
DE102011109256A1 (en) | 2011-08-02 | 2013-02-07 | Audi Ag | Valve gear of an internal combustion engine, internal combustion engine and method for producing a corresponding valve train |
WO2013178406A1 (en) * | 2012-06-01 | 2013-12-05 | Schaeffler Technologies AG & Co. KG | Main shaft for a sliding cam valve train |
DE102012212240A1 (en) | 2012-07-12 | 2014-01-16 | Schaeffler Technologies AG & Co. KG | Cam shaft for gas shuttle valve shoot of internal combustion engine, has cam group that is provided with cams having different projections for gas shuttle valve operation and axial link to stroke-variable |
DE102012016356A1 (en) * | 2012-08-16 | 2014-02-20 | Neumayer Tekfor Holding Gmbh | Adjustable camshaft for internal combustion engine, has shaft and cam packet, where shaft and cam packet are designed and aligned, such that shaft and cam packet are connected to each other in rotating manner |
US8863714B1 (en) | 2013-08-15 | 2014-10-21 | GM Global Technology Operations LLC | Camshaft assembly |
US8887681B2 (en) | 2009-12-18 | 2014-11-18 | Thyssenkrupp Presta Teccenter Ag | Cam unit for a constructed camshaft |
US9032922B2 (en) | 2013-10-21 | 2015-05-19 | GM Global Technology Operations LLC | Camshaft assembly |
DE102014007166A1 (en) | 2014-05-15 | 2015-11-19 | Audi Ag | Valve gear for an internal combustion engine, internal combustion engine and method for producing a corresponding valve train |
DE102014116450A1 (en) * | 2014-11-11 | 2016-05-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Camshaft for an internal combustion engine and use of such a camshaft |
EP2823160B1 (en) | 2012-03-08 | 2016-09-21 | Daimler AG | Internal combustion engine valve train adjustment device |
DE102015111776A1 (en) | 2015-07-21 | 2017-01-26 | Thyssenkrupp Presta Teccenter Ag | Internal combustion engine and a camshaft for such an internal combustion engine |
CZ306709B6 (en) * | 2015-12-09 | 2017-05-17 | VĂšTS, a.s. | A camshaft with a removable twin cam |
WO2017182444A1 (en) * | 2016-04-20 | 2017-10-26 | Thyssenkrupp Presta Teccenter Ag | Support tube of a camshaft with varying wall thickness |
DE102016014768A1 (en) | 2016-12-10 | 2018-06-14 | Daimler Ag | Camshaft for an internal combustion engine |
DE102017203869A1 (en) | 2017-03-09 | 2018-09-13 | Thyssenkrupp Ag | Camshaft with lubricated sliding piece |
DE102018133403A1 (en) * | 2018-12-21 | 2020-06-25 | Thyssenkrupp Ag | Camshaft, internal combustion engine and method for producing a camshaft |
DE102012014778B4 (en) | 2012-07-26 | 2023-12-28 | Mercedes-Benz Group AG | Valve train for an internal combustion engine |
DE102017201578B4 (en) | 2017-02-01 | 2024-02-15 | Thyssenkrupp Ag | Shaft-hub composite and method for producing a shaft-hub composite |
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DE102004002301A1 (en) * | 2004-01-16 | 2005-08-11 | Audi Ag | Process to manufacture an automotive camshaft by application of a sleeve-fit extension to main camshaft section |
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