DE102004033963A1 - Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve - Google Patents
Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve Download PDFInfo
- Publication number
- DE102004033963A1 DE102004033963A1 DE102004033963A DE102004033963A DE102004033963A1 DE 102004033963 A1 DE102004033963 A1 DE 102004033963A1 DE 102004033963 A DE102004033963 A DE 102004033963A DE 102004033963 A DE102004033963 A DE 102004033963A DE 102004033963 A1 DE102004033963 A1 DE 102004033963A1
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- stroke
- cylinder head
- internal combustion
- combustion engine
- 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- Withdrawn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
- F01L13/0005—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
- 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
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
-
- 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
- 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
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/032—Electric motors
-
- 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
- F01L2820/033—Hydraulic engines
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 eine Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, mit einem Zylinderkopf, wenigstens einer Nockenwelle, die über wenigstens einen Schlepphebel, insbesondere Rollenschlepphebel, wenigstens ein Gaswechselventil mechanisch betätigt, wobei der Schlepphebel an einem ersten Ende ein erstes Lager aufweist, das eine erste Schwenkachse für den Schlepphebel ausbildet, an einem dem ersten Ende gegenüberliegenden zweiten Ende ein zweites Lager aufweist, mit dem sich der Schlepphebel am Gaswechselventil abstützt, und zwischen dem ersten und dem zweiten Lager ein drittes Lager aufweist, mit dem der Schlepphebel an einem Nocken der Nockenwelle anliegt, gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to an internal combustion engine, in particular a motor vehicle, with a cylinder head, at least one camshaft, over at least a drag lever, in particular roller rocker arm, at least a gas exchange valve mechanically actuated, the rocker arm on a first end having a first pivot axis for the Towing lever forms, at a first end opposite second end has a second bearing, with which the drag lever supported on the gas exchange valve, and a third camp between the first and the second camp having, with the cam follower on a cam of the camshaft according to the preamble of claim 1
Im Stand der Technik sind verschiedene Ventilsteuerungen bekannt, die überwiegend eine komplexe Mechanik sowie daraus resultierend eine deutliche Reibleistungszunahme aufweisen. Die thermodynamisch erzielbaren Vorteile vollvariabler Ventilsteuerungen werden zumindest teilweise durch die Reibleistungszunahme kompensiert. Ferner weisen diese Systeme aufgrund der Komplexität hohe Mehrkosten auf.in the State of the art, various valve controls are known, the predominant a complex mechanics as well as a clear result Have friction loss increase. The thermodynamically achievable Advantages of fully variable valve controls are at least partially compensated by the friction increase. Furthermore, they have Systems due to complexity high additional costs.
Aus
der
Die
Aus
der
Aus
der
Der Erfindung liegt die Aufgabe zugrunde, eine variable Ventilhubsteuerung zur Verfügung zu stellen, welche bei Verzicht auf das thermodynamische Optimum nur eine geringe Reibleistungszunahme sowie günstige Herstellkosten aufweist.Of the Invention is based on the object, a variable valve lift to disposal to provide, which waives the thermodynamic optimum has only a small friction increase and low production costs.
Diese Aufgabe wird erfindungsgemäß durch eine Brennkraftmaschine der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen beschrieben.These The object is achieved by a Internal combustion engine o.g. Type with the characterized in claim 1 Characteristics solved. Advantageous embodiments of the invention are in the other claims described.
Dazu ist es bei einer Brennkraftmaschine der o.g. Art erfindungsgemäß vorgesehen, dass an dem Schlepphebel ein viertes Lager zwischen dem ersten Lager und dem dritten Lager vorgesehen ist, mit dem der Schlepphebel mit einer Lagervorrichtung gelenkig verbunden ist, welche bzgl. des Zylinderkopfes schaltbar wahlweise fixiert oder beweglich ist, und dass das erste Lager bzgl. des Zylinderkopfes schaltbar wahlweise fixiert oder beweglich ist, so dass wahlweise das erste Lager, das zweite Lager oder das vierte Lager eine Schwenkachse für den Schlepphebel entsprechend jeweils einem Kleinhub, einem Nullhub oder einem Vollhub des zugeordneten Gaswechselventils ausbildet.To it is in an internal combustion engine o.g. Art provided according to the invention, that on the finger follower a fourth bearing between the first bearing and the third bearing is provided, with the drag lever with a bearing device is hingedly connected, which with respect to the Cylinder head switchable either fixed or movable, and that the first bearing with respect to the cylinder head switchable selectively fixed or is movable, so that optionally the first bearing, the second Bearings or the fourth bearing a pivot axis for the finger follower accordingly each a small stroke, a zero stroke or a full stroke of the associated gas exchange valve formed.
Dies hat den Vorteil, dass auf einfache Weise und ohne starke Zunahme der Reibleistung eine Hub-Umschaltung des Schlepphebels und damit eine Hub-Umschaltung des zugeordneten Gaswechselventils zur Verfügung steht.This has the advantage that in a simple way and without a strong increase the friction power a stroke switching of the finger lever and thus a stroke switching of the associated gas exchange valve is available.
In einer bevorzugten Ausführungsform ist die Lagervorrichtung für das vierte Lager ein Vollhubstempel, welcher in einer Bohrung im Zylinderkopf axial verschiebbar geführt ist, wobei eine erste Sperrvorrichtung vorgesehen ist, welche den Vollhubstempel wahlweise in der Bohrung fixiert.In a preferred embodiment is the storage device for the fourth bearing a full - stroke stamp, which in a hole in the Cylinder head is guided axially displaceable, wherein a first locking device is provided, which the full-stroke punch either in the bore fixed.
Zweckmäßigerweise ist das erste Lager gelenkig mit einem Kleinhubstempel verbunden, welcher in einer Bohrung im Zylinderkopf axial verschiebbar geführt ist, wobei eine zweite Sperrvorrichtung vorgesehen ist, welche den Kleinhubstempel wahlweise in der Bohrung fixiert.Conveniently, the first bearing is pivotally connected to a Kleinhubstempel, which is guided axially displaceably in a bore in the cylinder head, wherein a second locking device is provided which the Kleinhubstempel optionally fixed in the bore.
Eine unerwünschte gleichzeitige Fixierung von Vollhubstempel und Kleinhubstempel wird dadurch funktionssicher vermieden, dass die erste Sperrvorrichtung und die zweite Sperrvorrichtung als ein einziges, innerhalb des Zylinderkopfes zwischen den Bohrungen von Vollhubstempel und Kleinhubstempel verschiebbares Bauteil derart ausgebildet und angeordnet ist, dass wahlweise der Vollhubstempel oder der Kleinhubstempel oder keiner von beiden in der jeweiligen Bohrung fixiert ist.A undesirable simultaneous fixation of full stop stamp and Kleinhubstempel is This reliably prevents the first locking device and the second locking device as a single, within the Cylinder head between the holes of full-stroke punch and small punch displaceable component is designed and arranged such that either the full-stroke stamp or the Kleinhiestempel or none is fixed by both in the respective bore.
Beispielsweise ist das vierte Lager als Rollenlager oder Gleitlager ausgebildet.For example the fourth bearing is designed as a roller bearing or sliding bearing.
Die Erfindung wird im folgenden anhand der Zeichnung näher erläutert. Diese zeigt inThe The invention will be explained in more detail below with reference to the drawing. These shows in
Die
aus
Erfindungsgemäß ist an
dem Rollenschlepphebel
Ein
erstes Sperrelement
Je
nach dem, welcher der Hubstempel
In
Bei
dem in
Bei
dem in
Der
besondere Vorteil dieser dritten Ausführungsform gemäß
Erfindungsgemäß sind somit
zwei statt einem Drehpunkt für
den Rollenschlepphebel
Der
Rollenschlepphebel bleibt in seiner Grundkonstruktion erhalten.
Das Drehgelenk
Bei
Blockierung des Kleinhubstempels
Ist
die Stützfeder
Die
Sperrvorrichtung
Die
zwei- oder dreistufige Hubumschaltung ist für Ein- und/oder Auslassseite
geeignet. Da alle Verstellvorrichtungen ortsfest im Zylinderkopf
Ein
Risiko besteht, wenn gleichzeitig Klein-
Die
Defaultstellung ist zur Sicherstellung eines ordnungsgemäßen Motorbetriebs
immer die Vollhubstellung (
Die
Prinzipskizze der Ventilerhebungskurven gemäß
Statt
der zweiten Rolle
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004033963A DE102004033963A1 (en) | 2004-07-14 | 2004-07-14 | Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004033963A DE102004033963A1 (en) | 2004-07-14 | 2004-07-14 | Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004033963A1 true DE102004033963A1 (en) | 2006-02-16 |
Family
ID=35668345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004033963A Withdrawn DE102004033963A1 (en) | 2004-07-14 | 2004-07-14 | Internal combustion engine for e.g. vehicle has cylinder head and camshaft, which activates charge-cycle valve over cam follower on which fourth bearing is provided between first and third bearing, which form swivel axis to lift valve |
Country Status (1)
Country | Link |
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DE (1) | DE102004033963A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017205151A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
DE102017205155A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
DE102017205141A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60243310A (en) * | 1984-05-18 | 1985-12-03 | Suzuki Motor Co Ltd | Variable opening amount of valve device for intake and exhaust valves of four-stroke cycle engine |
FR2663078A1 (en) * | 1990-06-06 | 1991-12-13 | Peugeot | Device for the moving arm and variable amplitude for lifting an internal combustion engine valve |
JPH10141033A (en) * | 1996-11-07 | 1998-05-26 | Aisin Seiki Co Ltd | Variable valve system |
DE19803000A1 (en) * | 1997-01-27 | 1998-08-27 | Aisin Seiki | IC engine valve actuating mechanism |
JPH11132021A (en) * | 1997-08-25 | 1999-05-18 | Aisin Seiki Co Ltd | Variable valve system for internal combustion engine |
WO2001098636A1 (en) * | 2000-06-16 | 2001-12-27 | Diesel Engine Retarders, Inc. | Variable lost motion valve actuator and method |
-
2004
- 2004-07-14 DE DE102004033963A patent/DE102004033963A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60243310A (en) * | 1984-05-18 | 1985-12-03 | Suzuki Motor Co Ltd | Variable opening amount of valve device for intake and exhaust valves of four-stroke cycle engine |
FR2663078A1 (en) * | 1990-06-06 | 1991-12-13 | Peugeot | Device for the moving arm and variable amplitude for lifting an internal combustion engine valve |
JPH10141033A (en) * | 1996-11-07 | 1998-05-26 | Aisin Seiki Co Ltd | Variable valve system |
DE19803000A1 (en) * | 1997-01-27 | 1998-08-27 | Aisin Seiki | IC engine valve actuating mechanism |
JPH11132021A (en) * | 1997-08-25 | 1999-05-18 | Aisin Seiki Co Ltd | Variable valve system for internal combustion engine |
WO2001098636A1 (en) * | 2000-06-16 | 2001-12-27 | Diesel Engine Retarders, Inc. | Variable lost motion valve actuator and method |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017205151A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
DE102017205155A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
DE102017205141A1 (en) | 2017-03-27 | 2018-09-27 | Mahle International Gmbh | Valve train for an internal combustion engine |
US10428702B2 (en) | 2017-03-27 | 2019-10-01 | Mahle International Gmbh | Valve drive for an internal combustion engine |
US10428701B2 (en) | 2017-03-27 | 2019-10-01 | Mahle International Gmbh | Valve drive for an internal combustion engine |
US10428698B2 (en) | 2017-03-27 | 2019-10-01 | Mahle International Gmbh | Valve drive for an internal combustion engine |
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Legal Events
Date | Code | Title | Description |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
R012 | Request for examination validly filed |
Effective date: 20110319 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20150203 |