DE102008024876A1 - Valve drive for gas exchange valve of internal-combustion engine, has cam support including cam pairs or cam groups working together with gas exchange valve of cylinders, and pivot bearings surrounding front ends of cam supports - Google Patents
Valve drive for gas exchange valve of internal-combustion engine, has cam support including cam pairs or cam groups working together with gas exchange valve of cylinders, and pivot bearings surrounding front ends of cam supports Download PDFInfo
- Publication number
- DE102008024876A1 DE102008024876A1 DE102008024876A DE102008024876A DE102008024876A1 DE 102008024876 A1 DE102008024876 A1 DE 102008024876A1 DE 102008024876 A DE102008024876 A DE 102008024876A DE 102008024876 A DE102008024876 A DE 102008024876A DE 102008024876 A1 DE102008024876 A1 DE 102008024876A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- cam carrier
- gear according
- valve gear
- front ends
- 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.)
- Granted
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
- 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
-
- 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
-
- 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
Abstract
Description
Die Erfindung betrifft einen Ventiltrieb für Gaswechselventile einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a valve train for gas exchange valves an internal combustion engine according to the preamble of claim 1.
Zur Verbesserung der thermodynamischen Eigenschaften von Brennkraftmaschinen sind Ventiltriebe bekannt, bei denen das Arbeitsspiel beeinflusst werden kann, um beispielsweise eine drehzahlabhängige Veränderung der Öffnungszeiten oder des Hubs der Gaswechselventile zu ermöglichen.to Improvement of the thermodynamic properties of internal combustion engines valve trains are known in which affects the working cycle can be, for example, a speed-dependent change the opening hours or the stroke of the gas exchange valves to enable.
Aus
der
Eine solche Lagerung der Nockenträger zwischen ihren beiden Nockenprofilgruppen stößt jedoch auf Probleme, wenn der axiale Abstand der beiden, zu jedem Nockenträger zugehörigen Gaswechselventile verhältnismäßig klein ist. In einem solchen Fall ist auch zwischen den beiden Nockenprofilgruppen nur ein verhältnismäßig kleiner Abstand vorhanden, wodurch entweder der axiale Verschiebeweg der Nockenträger durch die Lagerbrücken bzw. Drehlager stark eingeschränkt wird oder nur sehr schmale Lagerbrücken bzw. Drehlager verwendet werden können, die keine ausreichende Abstützung der Nockenwelle sicherstellen bzw. hohe Flächenpressungen aushalten müssen.A such storage of the cam carrier between their two Cam profile groups, however, encounter problems if the axial distance of the two, to each cam carrier associated gas exchange valves relatively is small. In such a case is also between the two cam profile groups only a relatively small distance existing, whereby either the axial displacement of the cam carrier severely limited by the bearing bridges or pivot bearings or only very narrow bearing bridges or pivot bearings can be used, which does not provide sufficient support Ensure camshaft or withstand high surface pressures have to.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, einen Ventiltrieb der eingangs genannten Art dahingehend zu verbessern, dass er sich auch bei Brennkraftma schinen einsetzen lässt, bei denen die mit dem Ventiltrieb zu betätigenden Gaswechselventile jedes Zylinders einen geringen axialen Abstand aufweisen.outgoing This is the object of the invention, a valve train of the type mentioned above to improve that he himself in internal combustion engines, in which the each with the valve gear actuated gas exchange valves Cylinder have a small axial distance.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass jedes Drehlager ein Stirnende von mindestens einem der Nockenträger umgibt.These The object is achieved according to the invention that each pivot bearing a front end of at least one of the cam carrier surrounds.
Mit der erfindungsgemäßen Merkmalskombination wird es möglich, Ventiltriebe der eingangs genannten Art auch bei solchen Brennkraftmaschinen einzusetzen, bei denen die beiden Einlass- oder Auslassventile jedes Zylinders einen geringen axialen Abstand aufweisen, da an den Stirnenden der Nockenträger angeordnete Drehlager durch den Abstand der beiden Einlass- oder Auslassventile nicht beeinflusst werden und somit breiter als bei einer Positionierung zwischen den beiden Einlass- oder Auslassventilen ausgebildet werden können. Da die Nockenträger weiterhin so auf der Nockenwelle positioniert sind, dass ihre Mitten zwischen den beiden Einlass- oder Auslassventilen der Zylinder angeordnet sind, werden die Drehlager gemäß einer bevorzugten Ausgestaltung der Erfindung nicht mehr wie bisher im Bereich zwischen den Einlass- oder Auslassventilen der Zylinder sondern beiderseits von diesen letzteren angeordnet.With the feature combination of the invention is It is possible, valve trains of the type mentioned also to use in such internal combustion engines, in which the two Inlet or exhaust valves of each cylinder a small axial distance have, since arranged at the front ends of the cam carrier Swivel bearing by the distance between the two intake or exhaust valves are not affected and thus wider than in a positioning be formed between the two inlet or outlet valves can. Since the cam carrier continues to be so on the Camshaft are positioned that their centers between the two Inlet or exhaust valves of the cylinders are arranged the pivot bearing according to a preferred embodiment of the invention no longer in the range between the inlet or exhaust valves of the cylinders but on both sides of these the latter arranged.
Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass mindestens ein Teil der Drehlager zwei sich überlappende Stirnenden benachbarter Nockenträger umgibt, deren Überlappung in Abhängigkeit von der jeweiligen Verschiebstellung der benachbarten Nockenträger mehr oder weniger stark sein kann.A Another preferred embodiment of the invention provides that at least one part of the pivot bearing two overlapping front ends surrounding adjacent cam carrier whose overlap in Dependent on the respective shift position of the neighboring Cam carrier can be more or less strong.
Um trotz einer gegenseitigen Verschiebbarkeit benachbarter Nockenträger in Bezug zueinander eine gegenseitige Überlappung über den gesamten Umfang der Nockenträger zu gewährleisten, weisen die Nockenträger bevorzugt röhrenförmige, zur Drehachse der Nockenwelle koaxiale Stirnenden auf, wobei die beiden einander zugewandten Stirnenden benachbarter Nockenträger nach Art eines Teleskoprohrs ineinander greifen.Around despite a mutual displacement of adjacent cam carrier in relation to each other a mutual overlap over to ensure the entire circumference of the cam carrier, the cam carriers preferably have tubular, to the axis of rotation of the camshaft coaxial front ends, wherein the two mutually facing ends of adjacent cam carrier mesh in the manner of a telescopic tube.
Um für eine gegenseitige Abstützung zweier innerhalb eines Drehlagers ineinander greifender Nockenträgerstirnenden zu sorgen, weist vorzugsweise eines der beiden röhrenförmigen Stirnenden einen Außendurchmesser auf, der dem Innendurchmesser des Drehlagers entspricht, während sein Innendurchmesser dem Außendurchmesser des anderen der beiden Stirnenden entspricht. Dadurch wird gewährleistet, dass beim Verschieben von einem der beiden Nockenträger im Bereich der Überlappung zum einen die ineinander greifenden Stirnenden aufeinander gleiten und zum andere eines der beiden Stirnenden auf einer inneren zylindrischen Lagerobefläche des Drehlagers gleitet, wenn dieses vorteilhaft als Gleitlager ausgebildet ist, dessen Lagerobefläche mit einer zylindrischen äußeren Umfangsfläche am Stirnende des einen Nockenelements zusammenwirkt.Around for a mutual support of two within a rotary bearing interlocking cam carrier front ends preferably has one of the two tubular Stirnenden an outer diameter, the inner diameter of the Swivel bearing corresponds, while its inner diameter the Outer diameter of the other of the two ends corresponds. This ensures that when moving from one the two cam carrier in the overlap area on the one hand the interlocking front ends slide on each other and to the other one of the two front ends on an inner cylindrical Bearing surface of the pivot bearing slides, if this advantageous is designed as a plain bearing whose Lagerobefläche with a cylindrical outer peripheral surface cooperates at the front end of a cam element.
Während die Drehlager für die Nockenträger aus der Mitte der Nockenträger heraus zu deren Stirnenden verlagert sind, sind umgekehrt die Mittel zum axialen Verschieben der Nockenträger statt wie bisher an den Stirnenden der Nockenträger vorzugsweise nahe der Mitte der Nockenträger angeordnet.While the pivot bearing for the cam carrier are displaced from the center of the cam carrier out to their front ends, conversely, the means for axially displacing the cam carrier instead as to arranged at the ends of the cam carrier preferably near the center of the cam carrier.
Entsprechendes gilt auch für Mittel zum Arretieren jedes Nockenträgers in unterschiedlichen Verschiebestellungen, die bei den Nockenträgern bekannter Ventiltriebe ebenfalls an den Stirnenden der Nockenträger angeordnet sind und bei den erfindungsgemäßen Nockenträgern vorzugsweise nahe der Mitte angeordnet sind.The same also applies to means for locking each cam carrier in different displacement positions, which in the cam carriers known valve trains also at the ends of the cam carrier are arranged and in the inventive Cam carriers are preferably arranged near the center.
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:in the The following is the invention with reference to an illustrated in the drawing Embodiment explained in more detail. Show it:
Bei
dem in der Zeichnung nur teilweise dargestellte Ventiltrieb
Der
Ventiltrieb
Die
drei hohlzylindrischen Nockenträger
Die
drei Nockenträger
Die
röhrenförmigen Stirnenden
Wie
am besten in
Die
axiale Verschiebung eines Nockenträgers
Der
Abstand der beiden Verschiebestellungen entspricht dem Mittenabstand
der beiden Nocken
- 11
- Ventiltriebvalve train
- 22
- Einlassventilintake valve
- 33
- Zylindercylinder
- 44
- Nockenwellecamshaft
- 55
- ZylinderkopfgehäuseCylinder head housing
- 66
- Aktuatoractuator
- 77
- Nockenträgercam support
- 88th
- Nockenpaarcam pair
- 99
- Nockenpaarcam pair
- 1010
- Nockencam
- 1111
- Nockencam
- 1212
- Rollerole
- 1313
- RollenschlepphebelRoller cam
- 1414
- Drehachse Nockenwelleaxis of rotation camshaft
- 1515
- röhrenförmiges Stirnende Nockenträgertubular Frontal cam carrier
- 1616
- röhrenförmiges Stirnende Nockenträgertubular Frontal cam carrier
- 1717
- Drehlagerpivot bearing
- 1818
- Drehlagerpivot bearing
- 2020
- Innenverzahnung Nockenträgerinternal gearing cam support
- 2121
- Außenverzahnung Nockenwelleexternal teeth camshaft
- 2222
- Mitnehmer Aktuatortakeaway actuator
- 2323
- schraubenförmige Nuthelical groove
- 2424
- Arretiernutlocking groove
- 2525
- Arretiernutlocking groove
- 2626
- Querbohrung Nockenwellecross hole camshaft
- 2727
- SchraubendruckfederHelical compression spring
- 2828
- Arretierkugeldetent
- 2929
- schräge Flanke Arretiernutslope Flank arresting groove
- 3030
- Stirnfläche Lagerface camp
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
- - DE 102004011586 A1 [0003] DE 102004011586 A1 [0003]
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008024876.2A DE102008024876B4 (en) | 2008-05-23 | 2008-05-23 | Valve drive for gas exchange valves of an internal combustion engine with displaceable cam carriers mounted on the front side |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008024876.2A DE102008024876B4 (en) | 2008-05-23 | 2008-05-23 | Valve drive for gas exchange valves of an internal combustion engine with displaceable cam carriers mounted on the front side |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102008024876A1 true DE102008024876A1 (en) | 2009-11-26 |
DE102008024876B4 DE102008024876B4 (en) | 2019-05-16 |
Family
ID=41212638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008024876.2A Active DE102008024876B4 (en) | 2008-05-23 | 2008-05-23 | Valve drive for gas exchange valves of an internal combustion engine with displaceable cam carriers mounted on the front side |
Country Status (1)
Country | Link |
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DE (1) | DE102008024876B4 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009056224A1 (en) * | 2009-11-28 | 2011-06-01 | Audi Ag | Valve drive for internal-combustion engine, has supporting element arranged non-contactly to axial projection in position overlapping in circumferential direction, where supporting element is placed against cam shaft in sections |
WO2011072782A1 (en) * | 2009-12-18 | 2011-06-23 | Thyssenkrupp Presta Teccenter Ag | Cam unit for a constructed camshaft |
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 |
WO2011063780A3 (en) * | 2009-11-26 | 2011-09-15 | Neumayer Tekfor Holding Gmbh | Camshaft |
DE102010020035A1 (en) * | 2010-05-11 | 2011-11-17 | Volkswagen Ag | Valve train for combustion engine, has selector gates exhibiting larger diameter in predetermined portion than outer diameter of cam piece such that cam piece is plunged into selector gates during axial displacement of another cam piece |
DE102010047993A1 (en) * | 2010-10-08 | 2012-04-26 | Audi Ag | Valve gear for gas shuttle valve of internal-combustion engine, has pivoted base cam shaft, on which multiple cam carriers are guided in axially shifted manner between two end catches |
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 |
WO2012171545A1 (en) * | 2011-06-16 | 2012-12-20 | Daimler Ag | Internal combustion engine valve drive device for a motor vehicle |
DE102014014659B3 (en) * | 2014-10-08 | 2016-01-14 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Cylinder head of an internal combustion engine with at least one camshaft |
DE102014109751A1 (en) * | 2014-07-11 | 2016-01-14 | Thyssenkrupp Presta Teccenter Ag | Method for arranging a camshaft in a camshaft module |
Citations (4)
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DE4236655A1 (en) * | 1992-10-30 | 1994-05-05 | Porsche Ag | Valve drive for an internal combustion engine |
DE19519048A1 (en) * | 1995-05-24 | 1996-11-28 | Hermann Prof Dr Ing Krueger | Lift valve drive for internal combustion engines |
DE102004011586A1 (en) | 2003-03-21 | 2004-10-07 | Audi Ag | Valve gear for internal combustion engine has facility whereby in first and second axial positions of cam carrier first and second stop faces fixed on cam carrier bear against respective first and second stop faces fixed on cylinder head |
DE102007056692A1 (en) * | 2007-11-24 | 2009-05-28 | Daimler Ag | Valve drive device |
-
2008
- 2008-05-23 DE DE102008024876.2A patent/DE102008024876B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4236655A1 (en) * | 1992-10-30 | 1994-05-05 | Porsche Ag | Valve drive for an internal combustion engine |
DE19519048A1 (en) * | 1995-05-24 | 1996-11-28 | Hermann Prof Dr Ing Krueger | Lift valve drive for internal combustion engines |
DE102004011586A1 (en) | 2003-03-21 | 2004-10-07 | Audi Ag | Valve gear for internal combustion engine has facility whereby in first and second axial positions of cam carrier first and second stop faces fixed on cam carrier bear against respective first and second stop faces fixed on cylinder head |
DE102007056692A1 (en) * | 2007-11-24 | 2009-05-28 | Daimler Ag | Valve drive device |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8607749B2 (en) | 2009-11-26 | 2013-12-17 | Neumayer Tekfor Holding GbmH | Camshaft |
WO2011063780A3 (en) * | 2009-11-26 | 2011-09-15 | Neumayer Tekfor Holding Gmbh | Camshaft |
DE102009056224A1 (en) * | 2009-11-28 | 2011-06-01 | Audi Ag | Valve drive for internal-combustion engine, has supporting element arranged non-contactly to axial projection in position overlapping in circumferential direction, where supporting element is placed against cam shaft in sections |
DE102009056224B4 (en) * | 2009-11-28 | 2019-08-22 | Audi Ag | Valve gear of an internal combustion engine and internal combustion engine |
WO2011072782A1 (en) * | 2009-12-18 | 2011-06-23 | Thyssenkrupp Presta Teccenter Ag | Cam unit for a constructed camshaft |
US8887681B2 (en) | 2009-12-18 | 2014-11-18 | Thyssenkrupp Presta Teccenter Ag | Cam unit for a constructed camshaft |
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 |
DE102010004591B4 (en) | 2010-01-14 | 2021-08-19 | Audi Ag | Built cam carrier for valve train |
DE102010020035A1 (en) * | 2010-05-11 | 2011-11-17 | Volkswagen Ag | Valve train for combustion engine, has selector gates exhibiting larger diameter in predetermined portion than outer diameter of cam piece such that cam piece is plunged into selector gates during axial displacement of another cam piece |
DE102010047993A1 (en) * | 2010-10-08 | 2012-04-26 | Audi Ag | Valve gear for gas shuttle valve of internal-combustion engine, has pivoted base cam shaft, on which multiple cam carriers are guided in axially shifted manner between two end catches |
DE102010047993B4 (en) * | 2010-10-08 | 2021-07-01 | Audi Ag | Valve drive for gas exchange valves of an internal combustion engine with displaceable cam carriers and co-rotating axial end stops as well as internal combustion engine |
KR200467402Y1 (en) * | 2011-03-31 | 2013-06-14 | 독터. 인제니어. 하.체. 에프. 포르쉐 악티엔게젤샤프트 | Valve train for combustion engine and method for manufacturing thereof |
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 |
DE102011001711B4 (en) | 2011-03-31 | 2023-06-07 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Valve train for an internal combustion engine and method of manufacturing the same |
US9145835B2 (en) | 2011-06-16 | 2015-09-29 | Daimler Ag | Internal combustion engine valve drive device for a motor vehicle |
WO2012171545A1 (en) * | 2011-06-16 | 2012-12-20 | Daimler Ag | Internal combustion engine valve drive device for a motor vehicle |
DE102014109751A1 (en) * | 2014-07-11 | 2016-01-14 | Thyssenkrupp Presta Teccenter Ag | Method for arranging a camshaft in a camshaft module |
DE102014109751B4 (en) * | 2014-07-11 | 2016-06-30 | Thyssenkrupp Presta Teccenter Ag | Method for arranging a camshaft in a camshaft module |
US10344629B2 (en) | 2014-07-11 | 2019-07-09 | Thyssenkrupp Presta Teccenter Ag | Method for arranging a camshaft in a camshaft module |
DE102014014659B3 (en) * | 2014-10-08 | 2016-01-14 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Cylinder head of an internal combustion engine with at least one camshaft |
US10006319B2 (en) | 2014-10-08 | 2018-06-26 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Cylinder head of an internal combustion engine with at least one camshaft |
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