DE10304991A1 - Adjusting device for effecting lifting functions of lever-type cam-driven transmission links works in a varied valve mechanism for controlling a spark-ignition internal combustion engine under load - Google Patents
Adjusting device for effecting lifting functions of lever-type cam-driven transmission links works in a varied valve mechanism for controlling a spark-ignition internal combustion engine under load Download PDFInfo
- Publication number
- DE10304991A1 DE10304991A1 DE10304991A DE10304991A DE10304991A1 DE 10304991 A1 DE10304991 A1 DE 10304991A1 DE 10304991 A DE10304991 A DE 10304991A DE 10304991 A DE10304991 A DE 10304991A DE 10304991 A1 DE10304991 A1 DE 10304991A1
- Authority
- DE
- Germany
- Prior art keywords
- rotatable shaft
- adjusting
- adjusting means
- adjustment
- screw
- 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- Withdrawn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
- F01L13/0021—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 by modification of rocker arm ratio
- F01L13/0026—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 by modification of rocker arm ratio by means of an eccentric
-
- 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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
-
- 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
- F01L13/0005—Deactivating valves
-
- 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
- F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
-
- 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
- F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" 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
- F01L2305/00—Valve arrangements comprising rollers
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/09—Calibrating
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 ein Verstellmittel zur Beeinflussung der Hubfunktion eines von zumindest einem Nocken beaufschlagten, hebelartigen Übertragungsgliedes in einem variablen Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine, welches Übertragungsglied zumindest mittelbar auf ein oder mehrere Gaswechselventile einwirkt, wobei das Verstellmittel aus einer verdrehbaren Welle und zumindest einem darauf verlaufenden, unmittelbaren Verstellelement für das Übertragungsglied wie einem Drehfinger mit einem Rastgebirge oder einer Exzenterscheibe besteht.The invention relates to an adjusting means to influence the lifting function of one of at least one cam acted upon, lever-like transmission member in a variable valve train for load control of a spark ignition internal combustion engine, which transmission link acts at least indirectly on one or more gas exchange valves, wherein the adjustment means from a rotatable shaft and at least one running, direct adjustment element for the transmission link such as a rotary finger with a locking rock or an eccentric disc consists.
Ein derartiges Verstellmittel ist
aus der als gattungsbildend betrachteten
Die vorgenannte starre Verbindung des Verstellelements auf der verdrehbaren Welle bzw. zumindest das Fehlen einer Möglichkeit eines äußerst einfachen Toleranzausgleichs, d.h. einer Feineinstellung der relativen Drehlage des Verstellelements zur Welle, ist nachteilig. So erfolgt im Stand der Technik ein Toleranzausgleich durch Zupaaren von Bauteilen bzw. Bauteilgruppen. Dabei wird beispielsweise zumindest ein Maß eines Bauteils in verschiedene Gruppen eingeteilt und in der anschließenden Montage der Ventiltrieb mit Teilen einer Gruppe zusammengebaut. Nach dem Vermessen der Ventilhübe aller Gaswechselventile können aus den Meßdaten Rückschlüsse darüber gezogen werden, bei welchen Bauteilen eine andere Gruppe verwendet werden muß, um einen gleichen Hub an allen Ventilen zu erreichen. Somit muß der Ventiltrieb zumindest teilweise wieder demontiert werden, mit anschließenden erneuten Montageschritten. Dies erhöht die Gesamtkosten zur Herstellung des Ventiltriebs unnötig, zumal sich eine aufwändige Lagerhaltung und eine komplizierte Logistik sich als erforderlich erweisen.The aforementioned rigid connection of the adjusting element on the rotatable shaft or at least that Lack of possibility an extremely simple one Tolerance compensation, i.e. a fine adjustment of the relative rotational position of the adjusting element to the shaft is disadvantageous. This is done in the stand the technology a tolerance compensation by pairing components or Subassemblies. Here, for example, at least one dimension is one Component divided into different groups and in the subsequent assembly the valve train is assembled with parts of a group. After this Measure the valve strokes all gas exchange valves can from the measurement data Conclusions drawn which components a different group is used for must to to achieve the same stroke on all valves. Thus, the valve train at least partially dismantled, with subsequent renewal Assembly steps. This increases the total cost of manufacturing the valve train unnecessary, especially yourself an elaborate Warehousing and complicated logistics turned out to be necessary prove.
Besitzen bei derartigen vollvariablen Ventiltrieben aufgrund von Bauteiltoleranzen die Gaswechselventile der nebeneinander liegenden Zylinder nicht den gleichen Ventilhub, erhalten die Zylinder voneinander abweichende Ladungsmengen. Dies führt zu einer erhöhten Unruhe im Rundlauf des Motors, gerade im unteren Drehzahl- und Lastbereich, wo Ventilhübe von < 1 mm generiert werden und sich die Toleranzunterschiede hier stärker auswirken.Possess such full variables Valve drives the gas exchange valves due to component tolerances the adjacent cylinder does not have the same valve lift, the cylinders receive different amounts of charge. This leads to a increased Unrest in the concentricity of the engine, especially in the lower speed and load range, where valve lifts generated from <1 mm and the differences in tolerance will have a greater impact here.
Aufgabe der Erfindung ist es daher, ein Verstellmittel der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile mit einfachen Mitteln beseitigt sind.The object of the invention is therefore to create an adjusting means of the aforementioned type, in which the disadvantages cited are eliminated by simple means.
Zusammenfassung der ErfindungSummary the invention
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass jedem Verstellelement wenigstens ein Justiermittel zugeordnet ist, über welches eine Feineinstellung dessen Endlage auf der verdrehbaren Welle erfolgt.According to the invention, this object solved, that each adjustment element is assigned at least one adjustment means is about which is a fine adjustment of its end position on the rotatable Wave occurs.
Hierdurch sind die eingangs beschriebenen Nachteile wirkungsvoll vermieden. Somit können die Bauteiltoleranzen von Verstellelement zu Verstellelement ausgeglichen werden. Es werden beim Nockenhub die erwünschten gleichen Ventilhübe generiert, mit dem Erfolg einer gleich beigemessenen Ladungsmenge je Zylinder, was zu einem ruhigen Motorlauf führt.As a result, the disadvantages described above are effectively avoided. So you can compensated for component tolerances from adjustment element to adjustment element become. The same desired valve strokes are generated during the cam stroke, with the success of an equal amount of charge per cylinder, which leads to quiet engine running.
Besonders vorteilhaft ist es, dass nach dem erstmaligen Zusammenbau des Ventiltriebs und dem anschließenden Vermessen der Ventilhübe keine aufwändige Demontage des Ventiltriebs und auch keine Bauteilgruppierung notwendig ist. Dies bedeutet eine erhebliche Kosteneinsparung. Auch ist die ansonsten notwendige Lagerhaftung zur Bereithaltung der gruppierten Bauteile sowie die Logistik stark vereinfacht. Der Fachmann erkennt zudem, dass, sollte sich während des Betriebes des Ventiltriebs eine Verschiebung der Ventilhübe zueinander ergeben, eine erneute Einstellung nach einer zweckmäßigen Gestaltung der Erfindung einfach möglich ist. Auch hier ist es nicht notwendig, Bauteile zu ersetzen. Denkbar und vorgesehen ist es jedoch auch, nach der Feineinstellung eine dauerhafte und somit nur zerstörend wieder lösbare Verbindung zwischen dem Verstellelement und der Welle vorzunehmen. Hier ist an eine Schweiß-, Kleb- o.ä. Verbindung gedacht.It is particularly advantageous that after the first assembly of the valve train and the subsequent measurement the valve strokes no elaborate Disassembly of the valve train and no component grouping necessary is. This means considerable cost savings. That is otherwise necessary warehouse liability to keep the grouped components ready and the logistics are greatly simplified. The specialist also recognizes that should happen during the operation of the valve train a displacement of the valve lifts to each other result in a new hiring after an appropriate design the invention easily possible is. It is also not necessary to replace components here. Conceivable and it is also provided, however, after the fine adjustment permanent and therefore only destructive again releasable Make connection between the adjusting element and the shaft. Here is on a sweat, Adhesive or similar Connection thought.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung soll das Justiermittel aus einem einfachen Schraubmittel wie einem Gewindestift bestehen. Dieses ist bogensehnenartig auf die verdrehbare Welle angestellt und liegt über seine Innenstirnseite an einer komplementären Anschlagfläche der verdrehbaren Welle an. Über eine Einschraubtiefe des Schraubmittels wird somit eine relative Verdrehung des Verstellelements zur verdrehbaren Welle ermöglicht. Vorteilhafterweise ist das Schraubmittel beispielsweise über eine Kontermutter zusätzlich an einem Lösen gehindert. Anstelle des Schraubmittels sind auch Stifte u.ä. einschiebbare Mittel einsetzbar. Auch können anstelle der Welle auch andere Verdrehmittel dem Verstellelement zugeordnet werden.According to an advantageous embodiment the invention is the adjustment means from a simple screw like a set screw. This is like a bowstring the rotatable shaft is turned on and lies against its inside face a complementary stop surface the rotatable shaft. about a screwing depth of the screw means thus becomes a relative one Rotation of the adjusting element to the rotatable shaft allows. The screw means is advantageously, for example, via a Lock nut additionally on a loosening prevented. Instead of the screw, there are also pens etc. insertable Means can be used. Can too instead of the shaft other means of rotation of the adjusting element be assigned.
Gemäß einer Ausgestaltung der Erfindung kann gleichzeitig über das Schraubmittel das im Betrieb auftretende Drehmoment zumindest in die Beaufschlagungsrichtung des Drehfingers übertragen werden (in Zeichnung hier entgegen dem Uhrzeigersinn). Somit wird auf zusätzliche Sicherungsmaßnahmen in Umfangsrichtung verzichtet.According to one embodiment of the invention, the torque occurring during operation can be at least included in the loading via the screwing means direction of impact of the rotating finger (in the drawing here counterclockwise). Additional circumferential security measures are therefore dispensed with.
Alternativ hierzu ist es vorgesehen, einerseits das Schraubmittel als Justiermittel zu verwenden und andererseits das Verstellelement mit einem durchgehenden Radialschlitz auszubilden, in dessen Bereich Klemmittel zur Herstellung einer drehfesten Verbindung appliziert sind. Diese Verbindung ist als lösbar zu betrachten.Alternatively, it is provided on the one hand to use the screw as an adjusting device and on the other hand, the adjustment element with a continuous radial slot to train in the area of clamping means for producing a non-rotatable connection are applied. This connection is considered releasable too consider.
Das erfindungsgemäße Verstellmittel kann in Ventiltrσebe eingebaut werden, welche lediglich variabel aber nicht vollvariabel bzw. nicht komplett drosselfrei arbeiten. Klar ist auch, dass wenigstens ein Verstellelement für sämtliche Übertragungsglieder aller Einlaßventile eines Zylinders bzw. ein Verstellelement je Gaswechselventil appliziert ist. Zudem kann die lösbare Verbindung auch noch über andere Mittel als die anspruchsgemäß genannten Schraubmittel hergestellt werden. So sind reibschlüssige Maßnahmen allgemeiner Art wie Druckstücke u.ä. ebenfalls denkbar. Auch können form- und/oder kraftschlüssige Rastelemente appliziert werden, welche nach erfolgter Feinjustierung der Verdrehlage diese endgültig halten.The adjusting means according to the invention can be installed in valve trays which are only variable but not fully variable or not work completely throttle-free. It is also clear that at least one adjustment element for all transmission links of all intake valves a cylinder or an adjusting element per gas exchange valve is. In addition, the detachable Connection also over other means produced than the screw means mentioned become. So are frictional activities general type such as pressure pieces etc. also conceivable. Can too positive and / or non-positive Snap elements are applied, which after fine adjustment the rotational position this finally hold.
Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert.The invention is useful based on the drawing explained.
Es zeigen:Show it:
Ausführliche Beschreibung der ZeichnungFull Description of the drawing
Wie aus
Anhand der
Zu
erkennen ist, dass das Verstellelement
It can be seen that the adjusting element
Je nach Einschraubtiefe des Schraubmittels
Das Schraubmittel
Gemäß
Nachdem der Ventiltrieb
Ggf. ist es auch denkbar, die Justiermittel nicht
direkt in das Verstellelement
- 11
- Verstellmitteladjustment
- 22
- Nockencam
- 33
- Übertragungsgliedtransmission member
- 3a3a
- Drehfingerrotating fingers
- 44
- Ventiltriebvalve train
- 55
- Wellewave
- 66
- Verstellelementadjustment
- 77
- RastgebirgeRest Mountains
- 88th
- Verbindungconnection
- 99
- Justiermitteladjusting
- 9a9a
- Schraubmittelscrew
- 1010
- DurchgangsbohrungThrough Hole
- 1111
- InnenstirnseiteInside front side
- 1212
- Anschlagflächestop surface
- 1313
- Bohrungdrilling
- 1414
- Radialschlitzradial slot
- 1515
- Klemmittelclamping means
- 15a15a
- Schraubverbindungscrew
- 1616
- InnenmehrkantInternal polygon
- 1717
- KonterungLock nut
- 1818
- Schwinghebelrocker
- 1919
- Einlaßventilintake valve
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10304991A DE10304991A1 (en) | 2003-02-07 | 2003-02-07 | Adjusting device for effecting lifting functions of lever-type cam-driven transmission links works in a varied valve mechanism for controlling a spark-ignition internal combustion engine under load |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10304991A DE10304991A1 (en) | 2003-02-07 | 2003-02-07 | Adjusting device for effecting lifting functions of lever-type cam-driven transmission links works in a varied valve mechanism for controlling a spark-ignition internal combustion engine under load |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10304991A1 true DE10304991A1 (en) | 2004-08-19 |
Family
ID=32730846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10304991A Withdrawn DE10304991A1 (en) | 2003-02-07 | 2003-02-07 | Adjusting device for effecting lifting functions of lever-type cam-driven transmission links works in a varied valve mechanism for controlling a spark-ignition internal combustion engine under load |
Country Status (1)
Country | Link |
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DE (1) | DE10304991A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004053208A1 (en) * | 2004-11-04 | 2006-07-20 | Schaeffler Kg | Fully variable mechanical valve gear for lift adjustment of gas exchange valves in reciprocating piston engine has cam plate fastened on adjusting shaft by at least one tension screw reaching through transverse hole in adjusting shaft |
DE102005017064B4 (en) * | 2004-04-13 | 2012-02-09 | Mitsubishi Fuso Truck And Bus Corp. | Variable valve unit for internal combustion engine |
WO2014202241A1 (en) * | 2013-06-21 | 2014-12-24 | Pierburg Gmbh | Method for producing equal valve lifts on variable valvetrains |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002035067A1 (en) * | 2000-10-25 | 2002-05-02 | Ina-Schaeffler Kg | Variable valve distributor for load-controlling a spark-ignited internal combustion engine |
EP1255027A1 (en) * | 2001-05-03 | 2002-11-06 | STS System Technology Services GmbH | Mechanic control of variable lift of an intake valve of an internal combustion engine |
DE10125082A1 (en) * | 2001-05-23 | 2002-11-28 | Bayerische Motoren Werke Ag | Valve drive device for an internal combustion engine comprises a piston having a device for attaching a tool for mechanical stroke actuation for play-free closing of the contact surfaces of a trailing lever and a valve drive element |
DE10205216A1 (en) * | 2002-02-08 | 2003-08-28 | Bosch Gmbh Robert | Cam and lever drive system for reciprocating pump with variable piston stroke incorporates intermediate lever with movable fulcrum point bearing against spring-loaded lever |
-
2003
- 2003-02-07 DE DE10304991A patent/DE10304991A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002035067A1 (en) * | 2000-10-25 | 2002-05-02 | Ina-Schaeffler Kg | Variable valve distributor for load-controlling a spark-ignited internal combustion engine |
EP1255027A1 (en) * | 2001-05-03 | 2002-11-06 | STS System Technology Services GmbH | Mechanic control of variable lift of an intake valve of an internal combustion engine |
DE10125082A1 (en) * | 2001-05-23 | 2002-11-28 | Bayerische Motoren Werke Ag | Valve drive device for an internal combustion engine comprises a piston having a device for attaching a tool for mechanical stroke actuation for play-free closing of the contact surfaces of a trailing lever and a valve drive element |
DE10205216A1 (en) * | 2002-02-08 | 2003-08-28 | Bosch Gmbh Robert | Cam and lever drive system for reciprocating pump with variable piston stroke incorporates intermediate lever with movable fulcrum point bearing against spring-loaded lever |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005017064B4 (en) * | 2004-04-13 | 2012-02-09 | Mitsubishi Fuso Truck And Bus Corp. | Variable valve unit for internal combustion engine |
DE102004053208A1 (en) * | 2004-11-04 | 2006-07-20 | Schaeffler Kg | Fully variable mechanical valve gear for lift adjustment of gas exchange valves in reciprocating piston engine has cam plate fastened on adjusting shaft by at least one tension screw reaching through transverse hole in adjusting shaft |
WO2014202241A1 (en) * | 2013-06-21 | 2014-12-24 | Pierburg Gmbh | Method for producing equal valve lifts on variable valvetrains |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER KG, 91074 HERZOGENAURACH, DE |
|
8139 | Disposal/non-payment of the annual fee |