EP1387049B1 - Schwenkhebel für einen hubvariablen Ventiltrieb - Google Patents
Schwenkhebel für einen hubvariablen Ventiltrieb Download PDFInfo
- Publication number
- EP1387049B1 EP1387049B1 EP03015069A EP03015069A EP1387049B1 EP 1387049 B1 EP1387049 B1 EP 1387049B1 EP 03015069 A EP03015069 A EP 03015069A EP 03015069 A EP03015069 A EP 03015069A EP 1387049 B1 EP1387049 B1 EP 1387049B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pivot lever
- link
- lever
- valve drive
- roller
- 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.)
- Expired - Lifetime
Links
Images
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
- 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
- F01L2301/00—Using particular materials
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- 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
- F01L2820/01—Absolute values
Definitions
- the invention relates to a pivot lever for a variable-stroke valve drive according to the features in the preamble of claim 1.
- valve drive device for variable stroke adjustment a gas exchange valve of an internal combustion engine described.
- Valve train device is the gas exchange valve with the interposition of a Transmission element with a movable about a rotation axis roller in operative connection with a control path comprising a no-lift curve and a lift curve, in an end region of a stroke for the gas exchange valve of a cam of a camshaft controlled pivot lever is arranged.
- the swivel lever housings produced by precision casting usually have a relatively high weight, which causes the highest speed of the internal combustion engine In addition, the manufacturing costs for precision castings could be limited high.
- the object of the present invention is to provide a generic pivoting lever lighter in weight and cheaper to make in manufacturing.
- the housing can be designed as a bending, stamped or welded construction. These inexpensive production methods reduce the manufacturing costs. Furthermore, the component thickness can be minimized in the course of sheet metal forming, since material hardening advantageously takes place during the forming process. Due to the weight reduction higher speeds can be achieved with the valve train.
- FIG. 1 shows a variable-stroke valve drive 2, which is connected to a partial representation Cylinder head 1 is arranged.
- the variable stroke valve train 2 consists essentially from a pivot lever 3 with a roller element 4 and a swing fulcrum 4 'and a gate 5 with a slide track 5', an intermediate element 7, a gas exchange valve 8, a cam 9, on a camshaft 9 'is arranged and a spring 10 and an adjusting device 11.
- the scenery 5 is fixedly arranged on the cylinder head 1.
- the pivot lever 3 is supported on the one hand on the roller element 4 on the slide track 5 'of the link 5 and on the other with a control track 6, which consists of a Leerhubkurve 6 'and a lift curve 6 " exists on the intermediate element 7 from.
- the intermediate element 7 is a roller cam follower, whose role is rotatable about a rotation axis 12.
- the rotation axis 12 is also the center of the slide track 5 'in a Nullhub too.
- the Intermediate element is supported on the one hand by the axis of rotation 12 on a clearance compensation element 14, here a hydraulic valve clearance compensation element, and on the other hand on the gas exchange valve 8 from.
- a further roller element 13 is arranged on the pivot lever 3. This is in operative connection with the cam 9.
- the camshaft 9 Upon rotation of the camshaft 9 'pivots the pivot lever 3 and presses with its lift curve 6 "that Gas exchange valve in an open position, not shown away.
- the first Roller element 4 is in addition to the support on the slide track 5 'in addition to an adjusting device 11 supported, with the swing pivot 4 'of the first Roller element 4 parallel to the slide track 5 'can be moved. Such Displacement causes a change in the valve lift.
- FIG. 2 shows a three-dimensional plan view of a device according to the invention Swivel lever 3 with a housing 17.
- the housing 17 is essentially of a first and a second side wall 3a arranged parallel to one another, 3b formed a bleaching part. This bleaching part is reshaped so that the side cheeks 3a, 3b form a U-shaped bracket.
- a stiffening bracket 16 is formed in a joined area.
- the middle area of the U-shaped Ironing forms the control track 6, consisting of the Leerhubkurve 6 'and the lift curve 6 ".
- the first and second side cheeks 3a, 3b in each case a corresponding one is located in the side cheeks 3a, 3b first bore 15 and again spaced from each one corresponding second bore 15 '.
- the second roller member 13 In the corresponding holes 15 is the second roller member 13 rotatably mounted, in the corresponding Holes 15 'is the first roller member 4 rotatably mounted.
- the stiffening bracket 16 In the area of the first roller element 4 are the first and second side cheeks 3a, 3b with the stiffening bracket 16, which extends in the direction of a roller axis and the first roller 4 bridged, connected.
- the two side walls 3a, 3b and the Control track 6 and the stiffening bracket 16 in one piece and of uniform material. she were created by forming from a metal sheet.
- the stiffening bracket 16 is on welded to its joint, but it can also be soldered.
- the sheet thickness is in the present case an average of about 3.5 mm, they can However, in a range between 1 and 5 mm or due to the deformation vary, depending on the mechanical requirements of the pivot lever 3 are made.
- the first roller element 4 and the second roller element 13 are made of hardened steel.
- the housing 17 by welding individual sheet metal parts, e.g. from the first and second side cheeks 3a, 3b and the control track 6 and the stiffening bracket 16 make up to produce.
- the first and the second roller element 4, 13 may be roller or needle bearing.
- the first and second side cheeks 3a, 3b also have stiffening ribs or similar structures.
- the stiffening bar 16 can also be arranged at a different location, or it can be more stiffening be provided.
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)
Description
In vorteilhafter Weise kann das Gehäuse als Biege, Stanz- oder Schweißkonstruktion ausgeführt werden. Diese preisgünstigen Herstellverfahren reduzieren die Herstellkosten. Ferner kann die Bauteilstärke im Zuge der Blechumformung minimal ausgelegt werden, da in vorteilhafter Weise bei der Umformung eine Materialverfestigung eintritt. Aufgrund der Gewichtsreduzierung sind mit dem Ventiltrieb höhere Drehzahlen erreichbar.
- Figur 1
- zeigt einen schematischen Aufbau eines gattungsgemäßen hubvariablen Ventiltriebes,
- Figur 2
- zeigt eine dreidimensionale Aufsicht auf einen erfindungsgemäßen Schwenkhebel.
- 1
- Zylinderkopf
- 2
- Hubvariabler Ventiltrieb
- 3
- Schwenkhebel
- 3a
- Erste Seitenwange
- 3b
- Zweite Seitenwange
- 4
- Erstes Rollenelement
- 4'
- Schwingdrehpunkt
- 5
- Kulisse
- 5'
- Kulissenbahn
- 6
- Steuerbahn
- 6'
- Leerhubkurve
- 6"
- Hubkurve
- 7
- Zwischenelement
- 8
- Gaswechselventil
- 9
- Nocken
- 9'
- Nockenwelle
- 10
- Feder
- 11
- Verstelleinrichtung
- 12
- Drehachse
- 13
- Zweites Rollenelement
- 14
- Spielausgleichselement
- 15
- Erste Bohrung
- 15'
- Zweite Bohrung
- 16
- Versteifungsbügel
- 17
- Gehäuse
Claims (4)
- Schwenkhebel (3) für einen hubvariablen Ventiltrieb (2) in einem Zylinderkopf (1) einer Brennkraftmaschine, der einerseits mit einem Rollenelement (4) mit einem Schwingdrehpunkt (4') auf einer Kulissenbahn (5') einer Kulisse (5) und andererseits mit einer Steuerbahn (6) auf einem Zwischenelement (7) zu einem Gaswechselventil (8) spielfrei abgestützt ist, wobei der Schwenkhebel (3) zur Hubeinstellung zwischen den Abstützpunkten einerseits von einem Nocken (9) einer Nockenwelle (9') entgegen einer Kraft einer Feder (10) gesteuert schwenkbar und andererseits der Schwingdrehpunkt (4') von einer Verstelleinrichtung (11) zur Hubhöhenverstellung parallel zur Kulissenbahn (5') gesteuert verschiebbar ist,
dadurch gekennzeichnet, dass der Schwenkhebel (3) und die Steuerbahn (6) aus Blech gefertigt sind. - Kulisse nach Patentanspruch 1,
dadurch gekennzeichnet, dass der Schwenkhebel (3) mit der Steuerbahn (6) einstückig und materialeinheitlich ist. - Schwenkhebel nach Patentanspruch 1 oder 2,
dadurch gekennzeichnet, dass das Blech ein Stahlblech ist. - Schwenkhebel nach einem der zuvor genannten Patentansprüche,
dadurch gekennzeichnet, dass die Blechstärke zwischen einem und fünf Millimeter beträgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10235402A DE10235402A1 (de) | 2002-08-02 | 2002-08-02 | Schwenkhebel für einen hubvariablen Ventiltrieb |
DE10235402 | 2002-08-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1387049A1 EP1387049A1 (de) | 2004-02-04 |
EP1387049B1 true EP1387049B1 (de) | 2005-01-26 |
Family
ID=30010567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03015069A Expired - Lifetime EP1387049B1 (de) | 2002-08-02 | 2003-07-03 | Schwenkhebel für einen hubvariablen Ventiltrieb |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1387049B1 (de) |
DE (2) | DE10235402A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006018510A1 (de) * | 2006-04-21 | 2007-10-25 | Schaeffler Kg | Schwinghebel für einen hubvariablen Ventiltrieb |
DE102010009399A1 (de) | 2010-02-26 | 2011-09-01 | Schaeffler Technologies Gmbh & Co. Kg | Schwenkhebel für einen hubvariablen Gaswechselventiltrieb |
DE102011003898B4 (de) * | 2011-02-10 | 2021-09-09 | Schaeffler Technologies AG & Co. KG | Zwischenhebel |
DE102011003900A1 (de) * | 2011-02-10 | 2012-08-16 | Schaeffler Technologies Gmbh & Co. Kg | Zwischenhebel |
DE102011077527A1 (de) * | 2011-06-15 | 2012-12-20 | Schaeffler Technologies AG & Co. KG | Zwischenhebel |
DE102012204682A1 (de) | 2012-03-23 | 2013-09-26 | Schaeffler Technologies AG & Co. KG | Hubvariabler Ventiltrieb für eine Brennkraftmaschine |
DE102012222374A1 (de) * | 2012-12-06 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Zwischenhebel |
DE102014206314A1 (de) * | 2014-04-02 | 2015-10-08 | Schaeffler Technologies AG & Co. KG | Verfahren zur Herstellung eines Zwischenhebels |
DE102014208809A1 (de) * | 2014-05-09 | 2015-11-12 | Schaeffler Technologies AG & Co. KG | Kipphebelanordnung für einen Ventiltrieb einer Brennkraftmaschine und Verfahren zur Montage einer Kipphebelanordnung |
DE102014208810A1 (de) * | 2014-05-09 | 2015-11-12 | Schaeffler Technologies AG & Co. KG | Kipphebelanordnung für einen Ventiltrieb einer Brennkraftmaschine und Verfahren zur Montage einer Kipphebelanordnung |
DE102014109573A1 (de) * | 2014-07-09 | 2016-01-14 | Pierburg Gmbh | Mechanisch steuerbarer Ventiltrieb |
DE102016220394B3 (de) * | 2016-10-18 | 2017-12-28 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4724805A (en) * | 1987-02-24 | 1988-02-16 | General Motors Corporation | Engine valve train module |
DE4326331A1 (de) * | 1992-07-15 | 1995-02-09 | Bayerische Motoren Werke Ag | Ventiltrieb einer Brennkraftmaschine |
DE19548389A1 (de) * | 1995-12-22 | 1997-06-26 | Siemens Ag | Verstellvorrichtung für den Hubverlauf eines Gaswechselventils einer Brennkraftmaschine |
DE19708484B4 (de) * | 1997-03-03 | 2006-07-13 | Bayerische Motoren Werke Ag | Vorrichtung zur Änderung des Ventilhubverlaufes eines Hubventils, insbesondere eines Gaswechselventils von Brennkraftmaschinen |
DE19810462B4 (de) * | 1998-03-11 | 2006-01-12 | Daimlerchrysler Ag | Kipphebel |
DE19816020A1 (de) * | 1998-04-09 | 1999-10-14 | Volkswagen Ag | Schlepphebel |
DE19913742A1 (de) * | 1999-03-26 | 2000-09-28 | Bayerische Motoren Werke Ag | Vorrichtung zur Hubverstellung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine |
JP2001065315A (ja) * | 1999-08-27 | 2001-03-13 | Nsk Ltd | 板金製ロッカーアーム |
DE10017441A1 (de) * | 2000-04-07 | 2001-10-11 | Bayerische Motoren Werke Ag | vorrichtung zur Hubverstellung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine |
DE10100173A1 (de) * | 2001-01-04 | 2002-07-11 | Fev Motorentech Gmbh | Vollvariabler mechanischer Ventiltrieb für eine Kolbenbrennkraftmaschine |
EP1255027B1 (de) * | 2001-05-03 | 2004-08-04 | STS System Technology Services GmbH | Mechanische Regelung der Hubverstellung des Einlassventils eines Verbrennungsmotors |
DE10123186A1 (de) * | 2001-05-12 | 2002-11-14 | Bayerische Motoren Werke Ag | Ventiltrieb-Vorrichtung zur variablen Hubverstellung eines Gaswechselventils einer Brennkraftmaschine |
-
2002
- 2002-08-02 DE DE10235402A patent/DE10235402A1/de not_active Withdrawn
-
2003
- 2003-07-03 EP EP03015069A patent/EP1387049B1/de not_active Expired - Lifetime
- 2003-07-03 DE DE50300275T patent/DE50300275D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50300275D1 (de) | 2005-03-03 |
DE10235402A1 (de) | 2004-02-12 |
EP1387049A1 (de) | 2004-02-04 |
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