DE102011001661A1 - Valve train for internal combustion engine, has clearance portion that is formed axially between the centering section and torque transmitting portion - Google Patents
Valve train for internal combustion engine, has clearance portion that is formed axially between the centering section and torque transmitting portion Download PDFInfo
- Publication number
- DE102011001661A1 DE102011001661A1 DE102011001661A DE102011001661A DE102011001661A1 DE 102011001661 A1 DE102011001661 A1 DE 102011001661A1 DE 102011001661 A DE102011001661 A DE 102011001661A DE 102011001661 A DE102011001661 A DE 102011001661A DE 102011001661 A1 DE102011001661 A1 DE 102011001661A1
- Authority
- DE
- Germany
- Prior art keywords
- camshaft
- sliding cam
- torque
- centering
- section
- 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
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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
- 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
- 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
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Die Erfindung betrifft einen Ventiltrieb für eine Brennkraftmaschine mit mehreren Zylindern gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a valve drive for an internal combustion engine having a plurality of cylinders according to the preamble of
Bei modernen Brennkraftmaschinen werden zur Optimierung der Ladungsbewegung im Brennraum variable Ventiltriebe verwendet, mit denen bei den Gaswechselventilen der Brennkraftmaschine unterschiedliche Ventilhübe eingestellt werden können. Aus der
Aus der
Die Funktion der Zentrierung sowie die Funktion der Drehmomentübertragung werden demnach nach dem Stand der Technik von ein und derselben Innenverzahnung des Schiebenockens sowie Außenverzahnung der Nockenwelle übernommen. Diese Art der Lagerung, die gleichzeitig die Zentrierfunktion und die Drehmomentübertragungsfunktion übernimmt, ist sehr toleranzempfindlich und nur mit großem Aufwand fertigbar.The function of the centering and the function of the torque transmission are therefore assumed in the prior art of one and the same internal toothing of the sliding cam and external teeth of the camshaft. This type of storage, which simultaneously performs the centering function and the torque transfer function, is very sensitive to tolerances and manufacturable only with great effort.
Aufgabe der Erfindung ist es, einen Ventiltrieb gemäß dem Oberbegriff des Patentanspruchs 1 so zu verbessern, dass derselbe weniger toleranzempfindlich und einfach fertigbar ist.The object of the invention is to improve a valve train according to the preamble of
Diese Aufgabe wird durch einen Ventiltrieb mit den Merkmalen des Patentanspruchs 1 gelöst. Erfindungsgemäß ist für die Zentrierung des jeweiligen Schiebenockens auf der jeweiligen Nockenwelle mindestens ein Zentrierungsabschnitt ausgebildet, wobei axial beabstandet und demnach räumlich und funktional getrennt von dem oder jedem Zentrierungsabschnitt für die Drehmomentübertragung zwischen der jeweiligen Nockenwelle und dem jeweiligen Schiebenocken mindestens ein Drehmomentübertragungsabschnitt ausgebildet ist, und wobei an der jeweiligen Nockenwelle axial zwischen einem Zentrierungsabschnitt und einem Drehmomentübertragungsabschnitt ein Freigangabschnitt ausgebildet ist, sodass zur Montage des jeweiligen Schiebenockens auf der jeweiligen Nockenwelle derselbe zunächst auf die jeweilige Nockenwelle um einen ersten Betrag axial aufschiebbar und anschließend nach einer Relativverdrehung zwischen Schiebenocken und Nockenwelle weiter um einen zweiten Betrag auf die Nockenwelle axial aufschiebbar ist.This object is achieved by a valve train having the features of
Die räumlich und funktional voneinander getrennten Abschnitte für Zentrierung und Drehmomentübertragung können jeweils unabhängig voneinander bedarfsorientiert ausgelegt werden, wodurch die Toleranzempfindlichkeit deutlich gesenkt werden kann. Es lassen sich die Fertigungsanforderungen reduzieren und Herstellungskosten einsparen. Der Ventiltrieb ist einfach mit hoher Genauigkeit herstellbar. Die Zentrierung des jeweiligen Schiebenockens auf der jeweiligen Nockenwelle erfolgt erst bei der Montage. Hierzu ist bei der Monatage die Relativverdrehung zwischen Schiebenocken und Nockenwelle durch den Freigangabschnitt möglich.The spatially and functionally separate sections for centering and torque transmission can each be designed independently of demand, whereby the tolerance sensitivity can be significantly reduced. It can reduce the manufacturing requirements and save manufacturing costs. The valve train can be easily manufactured with high accuracy. The centering of the respective sliding cam on the respective camshaft takes place only during assembly. For this purpose, the relative rotation between sliding cam and camshaft through the clearance section is possible at the Monatage.
Vorzugsweise ist der Freigangabschnitt an der Nockenwelle axial zwischen Zentrierungsvorsprüngen eines Zentrierungsabschnitts der Nockenwelle und Drehmomentübertragungsvorsprüngen eines Drehmomentübertragungsabschnitts der Nockenwelle ausgebildet, wobei ein Radius des Freigangabschnitts kleiner ist als ein Kopfradius von Drehmomentübertragungsvorsprüngen des auf der Nockenwelle montierten bzw. zu montierenden Schiebenockens. Die Relativverdrehung zwischen Schiebenocken und Nockenwelle erfolgt dann, nachdem beim axialen Aufschieben des Schiebenockens auf die Nockenwelle um den ersten Betrag Zentrierungsvorsprünge der Nockenwelle Drehmomentübertragungsvorsprünge des Schiebenockens passiert haben.Preferably, the clearance portion on the camshaft is formed axially between centering protrusions of a centering portion of the camshaft and torque transmitting protrusions of a torque transmitting portion of the camshaft, wherein a radius of the clearance portion is smaller than a head radius of torque transmitting protrusions of the camshaft mounted on the camshaft. The relative rotation between sliding cam and camshaft then takes place after the axial pushing the sliding cam on the camshaft by the first amount Zentrierungsvorsprünge the camshaft torque transfer projections of the sliding cam have passed.
Weitere Merkmale und Merkmalskombinationen ergeben sich aus der Beschreibung. Konkrete Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:Further features and combinations of features emerge from the description. Concrete embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Gemäß
Die Auslassventile werden von der nicht gezeigten Auslassnockenwelle in bekannter Weise gesteuert betätigt. Hierzu weist die im Nockenwellengehäuse
Bei den Einlassventilen und Auslassventilen handelt es sich um Gaswechselventile der Brennkraftmaschine.The intake valves and exhaust valves are gas exchange valves of the internal combustion engine.
Zur Lagerung der in
Gemäß
Gemäß
Jedem Schiebenocken
Um insbesondere nach einer axialen Verschiebung des jeweiligen Schiebenockens
Um trotz der axialen Verschiebbarkeit des Schiebenockens
Im gezeigten Ausführungsbeispiel sind für die Zentrierung des gezeigten Schiebenockens
Die Zentrierungsabschnitte
Der axial zwischen den Zentrierungsabschnitten
Zumindest in die radial innere Fläche
Die Zentrierungsvorsprünge
Ein Kopfradius R1 der in die radial innere Fläche
Nach vollendeter Montage des Schiebenockens
Wie bereits ausgeführt, sind im gezeigten Ausführungsbeispiel zwei Zentrierungsabschnitte
Durch die obige Ausgestaltung von Nockenwelle
In der in
Zur weiteren Montage des Schiebenockens
Wie
Weiterhin kann
Die Umfangsbreite der Nuten
Im Bereich des Drehmomentübertragungsabschnitts
Die Zentrierung des Schiebenockens
Zwischen den Nuten
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Zylinderkopfcylinder head
- 22
- ZylinderkopfdeckelCylinder head cover
- 33
- ZylinderkopfunterteilCylinder head lower part
- 44
- Nockenwellengehäusecamshaft housing
- 55
- Einlassventilintake valve
- 66
- Einlassnockenwelleintake camshaft
- 77
- Schiebenockenpushers
- 88th
- RadiallagereinrichtungenRadially storage facilities
- 99
- LagerringkörperBearing ring body
- 1010
- Lagerdeckelbearing cap
- 1111
- RollenschlepphebelRoller cam
- 1212
- Kulissenabschnittgate section
- 1313
- Nockenabschnittcam section
- 1414
- Nockenbahncam track
- 1515
- Nutgroove
- 1616
- Zentrierungsabschnittcentering section
- 1717
- DrehmomentübertragungsabschnittTorque transmission section
- 1818
- Zentrierungsvorsprungcentreing
- 1919
- Flächearea
- 2020
- DrehmomentübertragungsvorsprungTorque transmission lead
- 2121
- DrehmomentübertragungsvertiefungTorque transmission groove
- 2222
- DrehmomentübertragungsvorsprungTorque transmission lead
- 2323
- DrehmomentübertragungsvertiefungTorque transmission groove
- 2424
- Nutgroove
- 2525
- FreigangabschnittClearance section
- 2626
- Flankeflank
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES 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 of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 19611641 C1 [0002, 0002] DE 19611641 C1 [0002, 0002]
- DE 102007027979 A1 [0003] DE 102007027979 A1 [0003]
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011001661.9A DE102011001661B4 (en) | 2011-03-30 | 2011-03-30 | Valve train for an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011001661.9A DE102011001661B4 (en) | 2011-03-30 | 2011-03-30 | Valve train for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102011001661A1 true DE102011001661A1 (en) | 2012-10-04 |
DE102011001661B4 DE102011001661B4 (en) | 2019-03-21 |
Family
ID=46844640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011001661.9A Active DE102011001661B4 (en) | 2011-03-30 | 2011-03-30 | Valve train for an internal combustion engine |
Country Status (1)
Country | Link |
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DE (1) | DE102011001661B4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103726893A (en) * | 2012-10-11 | 2014-04-16 | Dr.Ing.h.c.F.保时捷股份公司 | Sliding cam arrangement for variable actuating gas exchange valves of an internal combustion engine |
CN103925027A (en) * | 2013-01-11 | 2014-07-16 | 铃木株式会社 | Variable Air Valve Device Of Internal Combustion Engine |
WO2016071016A1 (en) * | 2014-11-06 | 2016-05-12 | Thyssenkrupp Presta Teccenter Ag | Method for installing a camshaft module |
WO2018091040A1 (en) * | 2016-11-18 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Camshaft for an internal combustion engine |
DE102019105457A1 (en) * | 2019-03-04 | 2020-09-10 | Thyssenkrupp Ag | Camshaft, motor vehicle and method of assembling a camshaft |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2290599A (en) * | 1994-06-17 | 1996-01-03 | T & N Technology Ltd | Assembled camshaft |
DE19611641C1 (en) | 1996-03-25 | 1997-06-05 | Porsche Ag | Valve operating cam drive for combustion engines |
DE102007027979A1 (en) | 2007-06-19 | 2009-01-02 | Audi Ag | Valve drive for gas exchange valves of internal combustion engine, has camshaft, two cam pieces and holders, which are integrally formed on upper part of two-piece cylinder head housing |
DE102008035935A1 (en) * | 2008-07-31 | 2010-02-11 | Audi Ag | Toothed shaft connection and valve drive with toothed shaft connection between a camshaft and displaceable cam carriers |
DE102008053723A1 (en) * | 2008-10-29 | 2010-05-06 | Neumayer Tekfor Holding Gmbh | Camshaft and manufacturing process this |
DE102008064340A1 (en) * | 2008-12-20 | 2010-06-24 | Audi Ag | Valve train for gas exchange valves of internal-combustion engine, has base camshaft comprising cylindrical shaft sections between adjacent external gearing sections, and cam carriers radially guided on one of cylindrical shaft sections |
-
2011
- 2011-03-30 DE DE102011001661.9A patent/DE102011001661B4/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2290599A (en) * | 1994-06-17 | 1996-01-03 | T & N Technology Ltd | Assembled camshaft |
DE19611641C1 (en) | 1996-03-25 | 1997-06-05 | Porsche Ag | Valve operating cam drive for combustion engines |
DE102007027979A1 (en) | 2007-06-19 | 2009-01-02 | Audi Ag | Valve drive for gas exchange valves of internal combustion engine, has camshaft, two cam pieces and holders, which are integrally formed on upper part of two-piece cylinder head housing |
DE102008035935A1 (en) * | 2008-07-31 | 2010-02-11 | Audi Ag | Toothed shaft connection and valve drive with toothed shaft connection between a camshaft and displaceable cam carriers |
DE102008053723A1 (en) * | 2008-10-29 | 2010-05-06 | Neumayer Tekfor Holding Gmbh | Camshaft and manufacturing process this |
DE102008064340A1 (en) * | 2008-12-20 | 2010-06-24 | Audi Ag | Valve train for gas exchange valves of internal-combustion engine, has base camshaft comprising cylindrical shaft sections between adjacent external gearing sections, and cam carriers radially guided on one of cylindrical shaft sections |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103726893A (en) * | 2012-10-11 | 2014-04-16 | Dr.Ing.h.c.F.保时捷股份公司 | Sliding cam arrangement for variable actuating gas exchange valves of an internal combustion engine |
DE102012109690A1 (en) * | 2012-10-11 | 2014-04-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Sliding cam assembly for variable actuation of gas exchange valves of an internal combustion engine |
JP2014077443A (en) * | 2012-10-11 | 2014-05-01 | Dr Ing Hcf Porsche Ag | Sliding cam arrangement for variable actuating gas exchange valves of internal combustion engine |
CN103925027A (en) * | 2013-01-11 | 2014-07-16 | 铃木株式会社 | Variable Air Valve Device Of Internal Combustion Engine |
CN103925027B (en) * | 2013-01-11 | 2016-07-06 | 铃木株式会社 | The variable valve gear of internal combustion engine |
WO2016071016A1 (en) * | 2014-11-06 | 2016-05-12 | Thyssenkrupp Presta Teccenter Ag | Method for installing a camshaft module |
US10415435B2 (en) | 2014-11-06 | 2019-09-17 | Thyssenkrupp Presta Teccenter Ag | Method for installing a camshaft module |
WO2018091040A1 (en) * | 2016-11-18 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Camshaft for an internal combustion engine |
CN109891062A (en) * | 2016-11-18 | 2019-06-14 | 舍弗勒技术股份两合公司 | Camshaft for internal combustion engine |
DE102019105457A1 (en) * | 2019-03-04 | 2020-09-10 | Thyssenkrupp Ag | Camshaft, motor vehicle and method of assembling a camshaft |
Also Published As
Publication number | Publication date |
---|---|
DE102011001661B4 (en) | 2019-03-21 |
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