DE102007057811A1 - Valve gear for operating e.g. inlet valve, of three cylinders of W-type engine, has six cam groups including two respective different cam paths and formed on single cam support, where cam support is axially slidable on bottom cam shaft - Google Patents
Valve gear for operating e.g. inlet valve, of three cylinders of W-type engine, has six cam groups including two respective different cam paths and formed on single cam support, where cam support is axially slidable on bottom cam shaft Download PDFInfo
- Publication number
- DE102007057811A1 DE102007057811A1 DE102007057811A DE102007057811A DE102007057811A1 DE 102007057811 A1 DE102007057811 A1 DE 102007057811A1 DE 102007057811 A DE102007057811 A DE 102007057811A DE 102007057811 A DE102007057811 A DE 102007057811A DE 102007057811 A1 DE102007057811 A1 DE 102007057811A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- valve gear
- groups
- gear according
- actuators
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/031—Electromagnets
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 vorliegende Erfindung betrifft einen Ventiltrieb für Gaswechselventile einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs 1 sowie eine Brennkraftmaschine mit einem solchen Ventiltrieb.The The present invention relates to a valve train for gas exchange valves of Internal combustion engine according to the preamble of the claim 1 and an internal combustion engine with such a valve train.
Aus
der
Bei dem bekannten Ventiltrieb sind jeweils die zur Ansteuerung der Gaswechselventile eines einzelnen Zylinders dienenden Nockengruppen paarweise auf einem Nockenträger ausgebildet, der auf der Nockenwelle axial verschiebbar ist. Zur Verschiebung von jedem der vier einzelnen Nockenträger sind jeweils zwei im axialen Abstand voneinander angeordnete Schneckentriebe vorgesehen. Die Schneckentriebe umfassen eine linksgängige bzw. eine rechtgängige schrauben- oder schneckenförmige Nut im Nockenträger, mit der sich ein Stellglied eines Stellorgans des zugehörigen Schneckentriebs in Eingriff bringen lässt, um den Nockenträger auf der Nockenwelle nach links bzw. nach rechts zu bewegen.at the known valve train are each to control the gas exchange valves of a single cylinder serving cam groups in pairs a cam carrier formed on the camshaft is axially displaceable. To shift from each of the four individual Cam supports are each two axially spaced from each other arranged worm drives provided. The worm gears include a left-handed or a right-handed screwdriver or helical groove in the cam carrier, with which is an actuator of an actuator of the associated Worm drive can be engaged to the cam carrier to move left or right on the camshaft.
Da
bei dieser Anordnung zum einen eine größere Anzahl
von Schneckentrieben bzw. Stellorganen erforderlich ist und zum
anderen von diesen Schneckentrieben bzw. Stellorganen relativ viel
Bauraum im Zylinderkopfgehäuse eingenommen wird, wurde
in der
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, einen Ventiltrieb der eingangs genannten Art dahingehend weiterzuentwickeln, dass er sich zumindest für einige Brennkraftmaschinen mit einer ungeraden Zylinderzahl pro Zylinderreihe eignet.outgoing This is the object of the invention, a valve train of the type mentioned in the further develop that he at least for some internal combustion engines with a odd number of cylinders per cylinder bank.
Diese Aufgabe konnte überraschenderweise zumindest bei gewissen Motoren dadurch gelöst werden, dass man die Nocken zur Betätigung der Einlass- und/oder Auslassventile von drei benachbarten Zylindern auf einem einzigen Nockenträger zusammenfasst. Dies ist vor allem bei denjenigen Brennkraftmaschinen von Vorteil, bei denen die Anzahl der Zylinder pro Zylinderreihe ungerade ist und/oder ein Vielfaches von drei beträgt, insbesondere bei 3-, 6-, 9- oder 12-Zylinder-Motoren.These Surprisingly, at least for certain tasks Engines are solved by turning the cams to Actuation of the intake and / or exhaust valves of three adjacent cylinders on a single cam carrier summarizes. This is especially true of those internal combustion engines advantageous in which the number of cylinders per cylinder row is odd and / or is a multiple of three, especially for 3-, 6-, 9- or 12-cylinder engines.
Durch die erfindungsgemäße Lösung kann dort nicht nur die Anzahl der pro Zylinder benötigten Schneckentriebe bzw. Stellorgane weiter verringert werden, sondern entsprechend auch der zur Unterbringung derselben benötigte Bauraum innerhalb des Zylinderkopfgehäuses.By the solution according to the invention can there not just the number of worm drives required per cylinder or actuators are further reduced, but accordingly also the space required to accommodate the same inside the cylinder head housing.
Gemäß einer besonders bevorzugten Ausgestaltung der Erfindung erfolgt die Verschiebung des einzelnen Nockenträgers mit Hilfe von zwei Schneckentrieben, deren Stellorgane ortsfest im Zylinderkopf montiert sind und jeweils ein Stellglied aufweisen, wobei die beiden Stellglieder durch Betätigung der Stellorgane wahlweise bzw. abwechselnd mit dem Nockenträger in Eingriff gebracht werden können, um diesen in entgegengesetzte Richtungen zu verschieben. Die beiden Stellorgane sind vorzugsweise im axialen Abstand voneinander beiderseits des mittleren Zylinders ortsfest im Zylinderkopf montiert, so dass sich ihre Stellglieder jeweils zwischen einer der beiden Nockengruppen dieses Zylinders und einer benachbarten Nockengruppe von einem der beiden äußeren Zylinder mit dem Nockenträger in Eingriff bringen lassen. Der Eingriff erfolgt zweckmäßig dadurch, dass bei der Aktivierung das Stellglied des jeweiligen Stellorgans ausgefahren und mit einer dem Stellorgan gegenüberliegenden schnecken- bzw. schraubenförmigen Nut auf dem Nockenträger in Eingriff gebracht wird, die bei dem einen Schneckentrieb linksgängig und bei dem anderen Schneckentrieb rechtsgängig ist.According to one Particularly preferred embodiment of the invention, the displacement of the individual cam carrier with the help of two worm drives, whose actuators are fixedly mounted in the cylinder head and respectively having an actuator, wherein the two actuators by actuation the actuators either or alternately with the cam carrier can be engaged to this in opposite To move directions. The two actuators are preferably at an axial distance from each other on either side of the middle cylinder fixedly mounted in the cylinder head, so that its actuators in each case between one of the two cam groups of this cylinder and an adjacent cam group from one of the two outer Have the cylinder engaged with the cam carrier. The intervention is expediently characterized in that extended upon activation, the actuator of the respective actuator and with an actuator opposite screw or helical groove on the cam carrier in Intervention is brought to the left of the one worm drive and in the other worm gear is right-handed.
Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass die sechs Nockengruppen für die Gaswechselventile der drei Zylinder paarweise in Umfangsrichtung der Grundnockenwelle versetzte Scheitel aufweisen, jedoch einen gemeinsamen Grundkreisabschnitt besitzen, so dass der Nockenträger durch Aktivierung von einem der beiden Stellorgane verschoben werden kann, während Ventilbetätigungsmittel der zu betätigenden Gaswechselventile gegen den gemeinsamen Grundkreisabschnitt anliegen.A further preferred embodiment of the invention provides that the six cam groups for the gas exchange valves of the three cylinders in pairs in the circumferential direction of the base camshaft staggered vertices have, however, have a common base circle section, so that the cam carrier can be moved by activation of one of the two actuators, while Ven tilbetätigungsmittel the gas exchange valves to be operated against the common base circle section.
Die Scheitel der beiden Nockengruppen, die zur Betätigung der Gaswechselventile des mittleren Zylinders dienen, weisen in Umfangsrichtung der Grundnockenwelle vorzugsweise einen Winkelabstand von 50 bis 70 Grad von den Scheiteln der beiden Paare von Nockengruppen auf, die jeweils zur Betätigung der Gaswechselventile der beiden äußeren Zylinder dienen. Der gemeinsame Grundkreisabschnitt erstreckt sich zweckmäßig über einen Umfangswinkel zwischen 100 und 120 Grad und vorzugsweise über einen Umfangswinkel von etwa 110 Grad.The Vertex of the two groups of cams used to actuate the Serve gas exchange valves of the middle cylinder, point in the circumferential direction the basic camshaft preferably an angular distance of 50 to 70 degrees from the vertices of the two pairs of cam groups, each for actuating the gas exchange valves of the two outer cylinders serve. The common base circle section expediently extends over a circumferential angle between 100 and 120 degrees and preferably over a circumferential angle of about 110 degrees.
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:
Der
in der Zeichnung dargestellte Ventiltrieb
Zu
diesem Zweck umfasst der Ventiltrieb
Jedes
Paar von Nocken
Wie
am besten in
Auf
der anderen Seite weisen die Scheitel S der Nockenlaufbahnen
Darüber
hinaus kann auch die Form der beiden Nocken
Wie
am besten in
Wie
in
Um
den Nockenträger
Die
axiale Verschiebung des Nockenträgers
Die
Verschiebung des Nockenträgers
Wie
am besten in
Die
schrauben- oder schneckenförmige Nut
Um
den Nockenträger
- 11
- Ventiltriebvalve train
- 22
- VentilValve
- 33
- Grundnockenwellebase camshaft
- 44
- Nockenträgercam support
- 55
- Nockengruppecam group
- 66
- Nockengruppecam group
- 77
- Nockengruppecam group
- 88th
- Nockengruppecam group
- 99
- Nockengruppecam group
- 1010
- Nockengruppecam group
- 1111
- Rollerole
- 1212
- Schlepphebelcam follower
- 1313
- Ventiltellervalve disc
- 1414
- Ventilgliedvalve member
- 1515
- Ventilfedervalve spring
- 1616
- VentilspielausgleichselementLash adjuster
- 1717
- Drehachseaxis of rotation
- 1818
- NockenlaufbahnCam track
- 1919
- NockenlaufbahnCam track
- 2020
- GrundkreisabschnittBase circle portion
- 2121
- Innen-/AußenverzahnungInternal / external toothing
- 2222
- Schneckentriebworm drive
- 2323
- Schneckentriebworm drive
- 2424
- Aktuatoractuator
- 2525
- Aktuatoractuator
- 2626
- MitnehmerstiftCarrier pin
- 2727
- MitnehmerstiftCarrier pin
- 2828
- linksgängige Nutleft-handed groove
- 2929
- rechtsgängige Nutright-handed groove
- 3030
- Nutscheibegrooved disc
- 3131
- Nutscheibegrooved disc
- AA
- Drehrichtungdirection of rotation
- SS
- Scheitelvertex
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
- - WO 2004/083611 A1 [0002] WO 2004/083611 A1 [0002]
- - DE 102005006489 A1 [0004] DE 102005006489 A1 [0004]
Claims (16)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710057811 DE102007057811B4 (en) | 2007-11-30 | 2007-11-30 | Valve drive for gas exchange valves of an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710057811 DE102007057811B4 (en) | 2007-11-30 | 2007-11-30 | Valve drive for gas exchange valves of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102007057811A1 true DE102007057811A1 (en) | 2009-06-04 |
| DE102007057811B4 DE102007057811B4 (en) | 2015-04-30 |
Family
ID=40585865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200710057811 Active DE102007057811B4 (en) | 2007-11-30 | 2007-11-30 | Valve drive for gas exchange valves of an internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102007057811B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011050730A1 (en) * | 2011-05-30 | 2012-12-06 | Eto Magnetic Gmbh | Camshaft adjusting 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 |
| DE102015011243A1 (en) | 2015-08-27 | 2017-03-02 | Audi Ag | Valve train for an internal combustion engine and method for producing a corresponding valve train |
| DE102017104845A1 (en) | 2017-03-08 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with variable-displacement gas exchange valve actuation |
| US10655506B2 (en) | 2016-01-28 | 2020-05-19 | Isuzu Motors Limited | Camshaft and manufacturing method therefor |
| DE102022212010A1 (en) | 2022-11-11 | 2024-05-16 | Volkswagen Aktiengesellschaft | Overrun of a combustion engine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0579592A1 (en) * | 1992-07-13 | 1994-01-19 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Internal combustion engine comprising a camshaft with axial moving device |
| DE19833621A1 (en) * | 1998-07-25 | 2000-01-27 | Porsche Ag | Valve control unit for IC engines has operating pegs coupled in positive-locking fashion to at least one adjusting device sliding axially against load of return spring |
| 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 |
| WO2004083611A1 (en) | 2003-03-21 | 2004-09-30 | Audi Ag | Valve drive of an internal combustion engine comprising a cylinder head |
| DE102004037198A1 (en) * | 2004-07-30 | 2006-03-23 | Ina-Schaeffler Kg | Valve gear of an internal combustion engine |
| DE102005006489A1 (en) | 2005-02-12 | 2006-08-24 | Audi Ag | Camshaft for internal combustion engine has cam supports, adjacent to cylinders, which are coupled with each other whereby cam supports have common controller for accomplishing gear-shifting processes |
| DE102005020236A1 (en) * | 2005-04-30 | 2006-11-09 | Audi Ag | Method for fitting overhead camshaft onto IC engine using an assembly rig with spacer profiles to align the cams on the support shaft |
| DE102005033018A1 (en) * | 2005-07-15 | 2007-01-25 | Schaeffler Kg | Valve train for an internal combustion engine |
-
2007
- 2007-11-30 DE DE200710057811 patent/DE102007057811B4/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0579592A1 (en) * | 1992-07-13 | 1994-01-19 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Internal combustion engine comprising a camshaft with axial moving device |
| DE19833621A1 (en) * | 1998-07-25 | 2000-01-27 | Porsche Ag | Valve control unit for IC engines has operating pegs coupled in positive-locking fashion to at least one adjusting device sliding axially against load of return spring |
| 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 |
| WO2004083611A1 (en) | 2003-03-21 | 2004-09-30 | Audi Ag | Valve drive of an internal combustion engine comprising a cylinder head |
| DE102004037198A1 (en) * | 2004-07-30 | 2006-03-23 | Ina-Schaeffler Kg | Valve gear of an internal combustion engine |
| DE102005006489A1 (en) | 2005-02-12 | 2006-08-24 | Audi Ag | Camshaft for internal combustion engine has cam supports, adjacent to cylinders, which are coupled with each other whereby cam supports have common controller for accomplishing gear-shifting processes |
| DE102005020236A1 (en) * | 2005-04-30 | 2006-11-09 | Audi Ag | Method for fitting overhead camshaft onto IC engine using an assembly rig with spacer profiles to align the cams on the support shaft |
| DE102005033018A1 (en) * | 2005-07-15 | 2007-01-25 | Schaeffler Kg | Valve train for an internal combustion engine |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011050730A1 (en) * | 2011-05-30 | 2012-12-06 | Eto Magnetic Gmbh | Camshaft adjusting device |
| CN103597175A (en) * | 2011-05-30 | 2014-02-19 | Eto电磁有限责任公司 | Camshaft adjustment device |
| US8939119B2 (en) | 2011-05-30 | 2015-01-27 | Eto Magnetic Gmbh | Camshaft adjustment device |
| CN103597175B (en) * | 2011-05-30 | 2016-09-07 | Eto电磁有限责任公司 | Camshaft 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 |
| DE102015011243A1 (en) | 2015-08-27 | 2017-03-02 | Audi Ag | Valve train for an internal combustion engine and method for producing a corresponding valve train |
| US10655506B2 (en) | 2016-01-28 | 2020-05-19 | Isuzu Motors Limited | Camshaft and manufacturing method therefor |
| DE102017104845A1 (en) | 2017-03-08 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with variable-displacement gas exchange valve actuation |
| DE102017104845B4 (en) | 2017-03-08 | 2018-09-20 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with variable-displacement gas exchange valve actuation |
| DE102022212010A1 (en) | 2022-11-11 | 2024-05-16 | Volkswagen Aktiengesellschaft | Overrun of a combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007057811B4 (en) | 2015-04-30 |
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