DE102007016209A1 - Valve gear for four-cylinder row internal-combustion engine, has cam supports arranged in corresponding end positions for operating charge-cycle valve controlled by cam shaft, and axially moving between end positions on shaft - Google Patents
Valve gear for four-cylinder row internal-combustion engine, has cam supports arranged in corresponding end positions for operating charge-cycle valve controlled by cam shaft, and axially moving between end positions on shaft Download PDFInfo
- Publication number
- DE102007016209A1 DE102007016209A1 DE102007016209A DE102007016209A DE102007016209A1 DE 102007016209 A1 DE102007016209 A1 DE 102007016209A1 DE 102007016209 A DE102007016209 A DE 102007016209A DE 102007016209 A DE102007016209 A DE 102007016209A DE 102007016209 A1 DE102007016209 A1 DE 102007016209A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- camshaft
- cam carrier
- end positions
- valve gear
- 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
- F01L13/0042—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 being 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
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
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
Da bei dem bekannten Ventiltrieb sämtliche Nockenträger auf der Einlassnockenwelle bzw. auf der Auslassnockenwelle dieselbe Ausbildung aufweisen und sich gewöhnlich auch sämtlich in derselben Endstellung befinden, in der sie die Gaswechselventile der verschiedenen, von der Nockenwelle gesteuerten Zylinder in entsprechender Weise betätigen, wirken die über die Arretiervorrichtungen in die Nockenwelle eingeleiteten Reaktionskräfte fast immer in dieselbe Richtung. Dies führt dazu, dass ein in dieser Richtung am Stirnende der Nockenwelle befindliches Axiallager relativ hohen Andruckkräften ausgesetzt ist, was zu stärkeren Reibkräften und damit zu einem erhöhten Verschleiß im Lager führt.There in the known valve train all cam carrier on the intake camshaft or on the exhaust camshaft same Training and usually also all in the same end position in which they are the gas exchange valves the various, controlled by the camshaft cylinder in a corresponding Act way, which act on the locking devices reaction forces introduced into the camshaft almost always in the same direction. This causes one in that direction located at the front end of the camshaft thrust bearing is relatively high Pressure forces is exposed, resulting in stronger Frictional forces and thus increased wear in the Warehouse leads.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, bei einem Ventiltrieb der eingangs genannten Art eine Reduzierung der Andruckkräfte in den Axiallagern der Nockenwelle zu ermöglichen.outgoing This is the object of the invention in a valve drive of the type mentioned a reduction of the pressure forces to allow in the thrust bearings of the camshaft.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass sich die Nockenträger paarweise in entgegengesetzten Endstellungen befinden, um die mittels der Nockenwelle gesteuerten Gaswechselventile in einer entsprechenden Weise zu betätigen.These The object is achieved according to the invention that the cam carrier pairs in opposite directions End positions are to the controlled by the camshaft Actuate gas exchange valves in a corresponding manner.
Durch die erfindungsgemäße Maßnahme wird erreicht, dass die Nockenträger paarweise von entgegengesetzten Seiten her gegen die gehäusefesten Anlageflächen anliegen, so dass die von diesen über die Nockenträger und deren Arretiervorrichtungen in die Nockenwelle eingeleiteten axialen Reaktionskräfte paarweise eine entgegengesetzte Ausrichtung besitzen. Dadurch heben sich diese axialen Reaktionskräfte bei einer ungeraden Anzahl von Nockenträgern teilweise und bei einer geraden Anzahl von Nockenträgern im Wesentlichen vollständig auf.By the measure according to the invention is achieved that the cam carriers in pairs from opposite sides abut against the housing-fixed contact surfaces, so that of these on the cam carrier and the locking devices introduced into the camshaft axial Reaction forces in pairs an opposite orientation have. This raises these axial reaction forces partially with an odd number of cam carriers and with an even number of cam carriers substantially completely on.
Vorzugsweise sind jeweils benachbarte Nockenträger in unterschiedlichen Endstellungen angeordnet, so dass die von ihnen in die Nockenwelle eingeleiteten axialen Reaktionskräfte eine entgegengesetzte Ausrichtung besitzen.Preferably are each adjacent cam carrier in different End positions arranged, so that of them in the camshaft introduced axial reaction forces an opposite Own alignment.
Wenn
die mittels der Nockenwelle gesteuerten Gaswechselventile in entsprechender
Weise betätigt werden, befindet sich somit im Unterschied
zum Stand der Technik gemäß
Zur
Betätigung der Gaswechselventile weist jeder Nockenträger
wie beim Stand der Technik gemäß
Um zu gewährleisten, dass sämtliche Gaswechselventile in entsprechender Weise betätigt werden, obwohl sich ein Teil der Nockenträger in der einen Endstellung und ein anderer Teil der Nockenträger in der anderen Endstellung befindet, kann gemäß einer ersten alternativen Ausgestaltung der Erfindung vorgesehen werden, dass die Anordnung der Nocken der beiden Nockengruppen jeweils bei einem Teil der Nockenträger unterschiedlich ist, wobei die Anordnung bei zwei im Betrieb in unterschiedlichen Endstellungen befindlichen Nockenträgern vorzugsweise spiegelbildlich ist.Around to ensure that all gas exchange valves be operated in a similar manner, although a Part of the cam carrier in the one end position and a other part of the cam carrier in the other end position can, according to a first alternative Embodiment of the invention are provided that the arrangement the cam of the two cam groups each at a part of the cam carrier is different, the arrangement at two in operation in different Endstellungen located cam carriers is preferably mirror image.
Alternativ dazu können die mit den Nocken der beiden Nockengruppen zusammenwirkenden Schlepphebel der Gaswechselventile von unterschiedlichen bzw. benachbarten Zylindern jeweils eine unterschiedliche, vorzugsweise spiegelbildliche Ausbildung besitzen.alternative You can do this with the cams of the two cam groups interacting rocker arm of the gas exchange valves of different or adjacent cylinders each have a different, preferably have a mirror image training.
Vorzugsweise
umfasst jede der Arretiervorrichtungen wie beim Stand der Technik
gemäß
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt eine axiale Schnittansicht eines Teils einer Einlassnockenwelle eines Vierzylinder-Reihenmotors, mit der sich der Hub und/oder die Öffnungszeiten von zwei Einlassventilen (nicht dargestellt) von jedem der vier Zylinder verstellen lassen.in the The following is the invention with reference to an illustrated in the drawing Embodiment explained in more detail. The single figure shows an axial sectional view of a part of a Inlet camshaft of a four-cylinder inline engine, with the the lift and / or opening times of two intake valves (not shown) of each of the four cylinders.
Die
Einlassnockenwelle
Der
Aufbau der Nockenwelle
Wie
die in der
Um
die Nockenträger
Die
beiden parallelen, im axialen Abstand voneinander angeordneten Rastnuten
Der
axiale Mittenabstand der Nuten
Auf
diese Weise wird die radiale Druckkraft der Feder
Um
zu verhindern, dass sich die über die Nockenträger
Um
trotz der unterschiedlichen Endstellungen der Nockenträger
Obwohl
sich der eine
Wenn
im Betrieb der Brennkraftmaschine der Hub und/oder die Öffnungszeiten
sämtlicher Einlassventile verändert werden soll,
werden sämtliche Nockenträger in die jeweils andere
Endstellung verschoben, d. h. bei dem in der Zeichnung dargestellten
Ausführungsbeispiel der linke Nockenträger
- 11
- Nockenwellecamshaft
- 22
- Nockenträgercam support
- 33
- Nockenträgercam support
- 55
- Nockengruppecam group
- 66
- Nockengruppecam group
- 77
- Nockengruppecam group
- 88th
- Nockengruppecam group
- 99
- Nockencam
- 1010
- Nockencam
- 1111
- Nockencam
- 1212
- Nockencam
- 1313
- Grundkreisbase circle
- 1414
- Rollerole
- 1515
- Schlepphebelcam follower
- 1616
- Lagerbockbearing block
- 1717
- Lagerbockbearing block
- 1818
- ZylinderkopfgehäuseCylinder head housing
- 1919
- Schneckentriebworm drive
- 2020
- Schneckentriebworm drive
- 2121
- zylindrischer Abschnittcylindrical section
- 2222
- Stirnfläche Nockengruppeface cam group
- 2323
- Stirnfläche Nockengruppeface cam group
- 2424
- Stirnfläche Lagerbockface bearing block
- 2525
- Stirnfläche Lagerbockface bearing block
- 2626
- SacklochbohrungBlind hole
- 2727
- Arretierkugeldetent
- 2828
- Boden Sacklochbohrungground Blind hole
- 2929
- SchraubendruckfederHelical compression spring
- 3030
- innere Umfangsfläche Nockenträgerinner Peripheral surface cam carrier
- 3131
- Rastnutlocking groove
- 3232
- Rastnutlocking groove
- 3333
- Vorsprunghead Start
- 3434
- Nutflankeflank
- 3535
- Nutflankeflank
- F1F1
- Reaktionskraftreaction force
- F2F2
- Reaktionskraftreaction force
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 B1 [0003, 0009, 0010, 0013, 0016, 0017] - EP 1608849 B1 [0003, 0009, 0010, 0013, 0016, 0017]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007016209.1A DE102007016209B4 (en) | 2007-04-04 | 2007-04-04 | Valve train for gas exchange valves with axial force reduction in camshaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007016209.1A DE102007016209B4 (en) | 2007-04-04 | 2007-04-04 | Valve train for gas exchange valves with axial force reduction in camshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102007016209A1 true DE102007016209A1 (en) | 2008-10-09 |
DE102007016209B4 DE102007016209B4 (en) | 2016-07-07 |
Family
ID=39736146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007016209.1A Active DE102007016209B4 (en) | 2007-04-04 | 2007-04-04 | Valve train for gas exchange valves with axial force reduction in camshaft |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007016209B4 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009005731A1 (en) * | 2009-01-22 | 2010-08-05 | Audi Ag | Valve train for e.g. inlet valves of cylinders of internal-combustion engine of rail-mounted vehicle, has locking device comprising two spring-tensioned latching balls that are arranged in borehole i.e. through-hole, of base camshaft |
WO2012167867A1 (en) * | 2011-06-08 | 2012-12-13 | Schaeffler Technologies Ag & Co Kg | Mounting of a camshaft |
US8695549B2 (en) | 2011-05-13 | 2014-04-15 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Valve train for internal combustion engines for actuating gas exchange valves |
WO2016119934A1 (en) * | 2015-01-29 | 2016-08-04 | Thyssenkrupp Presta Teccenter Ag | Method for mounting a camshaft in a module body |
DE102007037358B4 (en) | 2007-08-08 | 2022-04-14 | Daimler Ag | engine switching device |
DE102022210544A1 (en) | 2022-10-06 | 2024-04-11 | Thyssenkrupp Ag | Sliding cam system and method for operating a sliding cam system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10148243A1 (en) * | 2001-09-28 | 2003-04-10 | Ina Schaeffler Kg | Valve drive with valve lift changing for the gas shuttle valve of a four-stroke internal combustion engine comprises a toothed shaft with an external tooth arrangement |
DE10241920A1 (en) * | 2002-09-10 | 2004-03-18 | Bayerische Motoren Werke Ag | Valve control system for IC engine has at least two cams per cylinder on a camshaft with axial adjustment and with one cam with a circular outer profile to switch off the valve action |
DE102004055852A1 (en) * | 2004-09-30 | 2006-04-13 | Bayerische Motoren Werke Ag | Valve drive for internal combustion engine has switch curve device arranged to apply switching force only when cam device is in basic circle phase |
DE102004056290A1 (en) * | 2004-11-22 | 2006-06-01 | Audi Ag | Valve gear for internal combustion engine, has notch with primary drill hole for receiving spring unit and resting unit in base cam shaft, and recess breaking through peripheral ring of primary drill hole at surface of shaft |
EP1608849B1 (en) | 2003-03-21 | 2006-10-04 | Audi Ag | Valve drive of an internal combustion engine comprising a cylinder head |
-
2007
- 2007-04-04 DE DE102007016209.1A patent/DE102007016209B4/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10148243A1 (en) * | 2001-09-28 | 2003-04-10 | Ina Schaeffler Kg | Valve drive with valve lift changing for the gas shuttle valve of a four-stroke internal combustion engine comprises a toothed shaft with an external tooth arrangement |
DE10241920A1 (en) * | 2002-09-10 | 2004-03-18 | Bayerische Motoren Werke Ag | Valve control system for IC engine has at least two cams per cylinder on a camshaft with axial adjustment and with one cam with a circular outer profile to switch off the valve action |
EP1608849B1 (en) | 2003-03-21 | 2006-10-04 | Audi Ag | Valve drive of an internal combustion engine comprising a cylinder head |
DE102004055852A1 (en) * | 2004-09-30 | 2006-04-13 | Bayerische Motoren Werke Ag | Valve drive for internal combustion engine has switch curve device arranged to apply switching force only when cam device is in basic circle phase |
DE102004056290A1 (en) * | 2004-11-22 | 2006-06-01 | Audi Ag | Valve gear for internal combustion engine, has notch with primary drill hole for receiving spring unit and resting unit in base cam shaft, and recess breaking through peripheral ring of primary drill hole at surface of shaft |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007037358B4 (en) | 2007-08-08 | 2022-04-14 | Daimler Ag | engine switching device |
DE102009005731A1 (en) * | 2009-01-22 | 2010-08-05 | Audi Ag | Valve train for e.g. inlet valves of cylinders of internal-combustion engine of rail-mounted vehicle, has locking device comprising two spring-tensioned latching balls that are arranged in borehole i.e. through-hole, of base camshaft |
DE102009005731B4 (en) | 2009-01-22 | 2020-01-09 | Audi Ag | Valve train for gas exchange valves with inclined double ball catch |
US8695549B2 (en) | 2011-05-13 | 2014-04-15 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Valve train for internal combustion engines for actuating gas exchange valves |
WO2012167867A1 (en) * | 2011-06-08 | 2012-12-13 | Schaeffler Technologies Ag & Co Kg | Mounting of a camshaft |
US9121354B2 (en) | 2011-06-08 | 2015-09-01 | Schaeffler Technologies AG & Co. KG | Mounting of a camshaft |
WO2016119934A1 (en) * | 2015-01-29 | 2016-08-04 | Thyssenkrupp Presta Teccenter Ag | Method for mounting a camshaft in a module body |
US10711665B2 (en) | 2015-01-29 | 2020-07-14 | Thyssenkrupp Presta Teccenter Ag | Method for assembling a camshaft in a module body |
DE102022210544A1 (en) | 2022-10-06 | 2024-04-11 | Thyssenkrupp Ag | Sliding cam system and method for operating a sliding cam system |
Also Published As
Publication number | Publication date |
---|---|
DE102007016209B4 (en) | 2016-07-07 |
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