DE102007048931A1 - Valve gear device for internal-combustion engine, has stroke adjuster including intermediate shaft around which cam shaft changing valve elevation curve is supported and is movable along cam follower element - Google Patents
Valve gear device for internal-combustion engine, has stroke adjuster including intermediate shaft around which cam shaft changing valve elevation curve is supported and is movable along cam follower element Download PDFInfo
- Publication number
- DE102007048931A1 DE102007048931A1 DE200710048931 DE102007048931A DE102007048931A1 DE 102007048931 A1 DE102007048931 A1 DE 102007048931A1 DE 200710048931 DE200710048931 DE 200710048931 DE 102007048931 A DE102007048931 A DE 102007048931A DE 102007048931 A1 DE102007048931 A1 DE 102007048931A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- valve
- follower element
- intermediate shaft
- cam follower
- 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.)
- Withdrawn
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
-
- 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
Abstract
Description
Die Erfindung betrifft eine Ventilsteuerungsvorrichtung für eine Brennkraftmaschine der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The The invention relates to a valve control device for an internal combustion engine in the preamble of claim 1 specified type.
Eine
derartige Ventilsteuerungsvorrichtung ist beispielsweise bereits
aus der
Aufgabe der vorliegenden Erfindung ist es, eine Ventilsteuerungsvorrichtung der eingangs genannten Art zu schaffen, welche konstruktiv einfacher ausgebildet ist.task The present invention is a valve control device to create the type mentioned, which structurally simpler design is.
Die Aufgabe wird erfindungsgemäß durch eine Ventilsteuerungsvorrichtung mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen und nicht-trivialen Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.The The object is achieved by a valve control device solved with the features of claim 1. advantageous Embodiments with appropriate and non-trivial Further developments of the invention are in the subclaims specified.
Eine Ventilsteuerungsvorrichtung, welche konstruktiv einfacher ausgebildet ist, ist erfindungsgemäß dadurch geschaffen, dass die Hubverstelleinrichtung eine Zwischenwelle umfasst, um welche die Nockenwelle zur Veränderung der Ventilhebungskurve verschwenkbar gelagert und entlang des Nockenfolgerelements bewegbar ist. Mit anderen Worten wird zur Veränderung der Ventilhebungskurve des Gaswechselventils die Nockenwelle selbst bewegt, wodurch keine konstruktiv aufwändige Hubverstelleinrichtung mit Rollen, Kulissenführung, Schieber und dergleichen benötigt wird. Neben der dadurch erzielbaren Einsparung von Herstellungskosten und Montagezeit besitzt die erfindungsgemäße Ventilsteuerungsvorrichtung zudem einen sehr geringen Bauraumbedarf.A Valve control device, which structurally simpler design is, is inventively created by the fact that the Hubverstelleinrichtung includes an intermediate shaft to which the camshaft to change the valve lift curve pivotally mounted and movable along the cam follower element is. In other words, to change the valve lift curve the gas exchange valve moves the camshaft itself, causing no structurally complex stroke adjustment device with rollers, Slotted guide, slide and the like required becomes. In addition to the resulting savings in manufacturing costs and assembly time has the valve control device according to the invention also a very small space requirement.
In einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass ein mit dem Nocken in Wirkverbindung stehender Kontaktbereich des Nockenfolgerelements im Querschnitt kreisbogenförmig ausgebildet ist, wobei eine Drehachse der Zwischenwelle den Mittelpunkt des Kreisbogens bildet. Dies ermöglicht es, dass sich zumindest in einem Grundkreiskonturbereich des Nockens die Lage des Nockenfolgerelements beim Verschwenken der Nockenwelle nicht ändert und das Ventilspiel somit beim Verändern der Ventilhebungskurve konstant bleibt.In an advantageous embodiment of the invention is provided a contact area operatively connected to the cam the cam follower element in cross-section circular arc-shaped is, wherein an axis of rotation of the intermediate shaft, the center of the Arc forms. This makes it possible, at least in a base circle contour area of the cam, the position of the cam follower element does not change during pivoting of the camshaft and that Valve clearance thus when changing the valve lift curve remains constant.
Weitere Vorteile ergeben sich dadurch, dass die Zwischenwelle mit einem Antriebsrad der Nockenwelle in Wirkverbindung steht. Auf diese Weise wird die Nockenwelle beim Verschwenken um die Zwischenwelle gleichzeitig um die eigene Drehachse gedreht, wodurch eine einfache Einflussnahme auf die Steuerzeiten der Ventilsteuerungsvorrichtung genommen werden kann.Further Benefits result from the fact that the intermediate shaft with a Drive wheel of the camshaft is in operative connection. This way will the camshaft when pivoting about the intermediate shaft simultaneously rotated around its own axis of rotation, creating a simple influence be taken to the timing of the valve control device can.
Dabei hat es sich als vorteilhaft gezeigt, dass die Zwischenwelle und das Antriebsrad derart aneinander angepasst sind, dass ihr Übersetzungsverhältnis eins oder ungleich eins ist. Bei einem Übersetzungsverhältnis von eins kann die Ventilhebungskurve verändert werden, ohne die Steuerzeiten zu verändern. Umgekehrt lassen sich bei einem Übersetzungsverhältnis größer oder kleiner eins gezielte Steuerzeitverschiebungen realisieren.there It has proved to be advantageous that the intermediate shaft and the drive wheel are adapted to each other so that their gear ratio one or not equal to one. At a gear ratio from one, the valve lift curve can be changed without changing the timing. Conversely, it is possible larger at a gear ratio or smaller one realize targeted tax time shifts.
Indem das Nockenfolgerelement als Schlepphebel ausgebildet ist, kann durch eine entsprechende Ausgestaltung beider Hebelarme des Schlepphebels ein zusätzlicher Einfluss auf das Übersetzungsverhältnis des durch die Nockenkontur bestimmten Nockenhubs auf die Ventilhebungskurve des Gaswechselventils genommen werden. Zudem sind die auf den Schlepphebel wirkenden Kräfte im Vergleich zu anderen Lösungen wie etwa Kipphebel oder Tassenstößel vergleichsweise gering.By doing the cam follower element is designed as a drag lever, can by a corresponding embodiment of the two lever arms of the finger lever an additional influence on the gear ratio of the cam contour determined by the cam contour on the valve lift curve of Gas exchange valve are taken. They are also on the rocker arm acting forces compared to other solutions such as rocker arms or bucket tappets comparatively low.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels sowie anhand der Zeichnungen. Dabei zeigen:Further Advantages, features and details of the invention will become apparent the following description of an embodiment as well as from the drawings. Showing:
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 10140635 A1 [0002] DE 10140635 A1 [0002]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710048931 DE102007048931A1 (en) | 2007-10-12 | 2007-10-12 | Valve gear device for internal-combustion engine, has stroke adjuster including intermediate shaft around which cam shaft changing valve elevation curve is supported and is movable along cam follower element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710048931 DE102007048931A1 (en) | 2007-10-12 | 2007-10-12 | Valve gear device for internal-combustion engine, has stroke adjuster including intermediate shaft around which cam shaft changing valve elevation curve is supported and is movable along cam follower element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007048931A1 true DE102007048931A1 (en) | 2009-01-29 |
Family
ID=40157451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200710048931 Withdrawn DE102007048931A1 (en) | 2007-10-12 | 2007-10-12 | Valve gear device for internal-combustion engine, has stroke adjuster including intermediate shaft around which cam shaft changing valve elevation curve is supported and is movable along cam follower element |
Country Status (1)
Country | Link |
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DE (1) | DE102007048931A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011116439A1 (en) | 2011-10-19 | 2013-04-25 | Daimler Ag | Valve train device for internal combustion engine of motor car, has adjustment device provided for adjustment of full-variable valve and comprising adjustment element, and rocker arms connected to element and moved with respect to cam shaft |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10140635A1 (en) | 2001-08-13 | 2003-04-24 | Rudolf Flierl | Device for independent variable timing adjustment of gas exchange valves of IC engines has valve lifter and crank shaped to make valve acceleration ratio dependent upon set valve stroke |
-
2007
- 2007-10-12 DE DE200710048931 patent/DE102007048931A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10140635A1 (en) | 2001-08-13 | 2003-04-24 | Rudolf Flierl | Device for independent variable timing adjustment of gas exchange valves of IC engines has valve lifter and crank shaped to make valve acceleration ratio dependent upon set valve stroke |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011116439A1 (en) | 2011-10-19 | 2013-04-25 | Daimler Ag | Valve train device for internal combustion engine of motor car, has adjustment device provided for adjustment of full-variable valve and comprising adjustment element, and rocker arms connected to element and moved with respect to cam shaft |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
R005 | Application deemed withdrawn due to failure to request examination | ||
R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20141014 |