EP1573174A1 - Zwischenhebel für einen variablen ventiltrieb einer brennkraftmaschine - Google Patents
Zwischenhebel für einen variablen ventiltrieb einer brennkraftmaschineInfo
- Publication number
- EP1573174A1 EP1573174A1 EP03767808A EP03767808A EP1573174A1 EP 1573174 A1 EP1573174 A1 EP 1573174A1 EP 03767808 A EP03767808 A EP 03767808A EP 03767808 A EP03767808 A EP 03767808A EP 1573174 A1 EP1573174 A1 EP 1573174A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate lever
- lever according
- guide
- return spring
- extension
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 5
- 238000005452 bending Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000007769 metal material Substances 0.000 claims description 5
- 238000004049 embossing Methods 0.000 claims description 2
- 238000013459 approach Methods 0.000 claims 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000000295 complement effect Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F01L13/0063—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
Definitions
- the invention relates to an intermediate lever for a variable valve train of an internal combustion engine, with a loading and a swiveling end, a cam contact surface and a system for a return spring, the loading end running on the end face of the intermediate lever and being provided with a sliding surface for contact with a lever-like valve opener.
- the pivot end is designed to be communicable with eccentric means for changing the position of the intermediate lever and wherein the cam contact surface is arranged between the loading and the pivot end.
- the object of the invention is therefore to provide an intermediate lever of the aforementioned type, in which the disadvantages mentioned are eliminated with simple means.
- the intermediate lever consists of thin-walled sheet metal material and is produced essentially in a stamping and bending process.
- the system is positioned on an upper or lower side of the intermediate lever at the edge region at the end of the loading and that a crowned extension for contact of a leg extends in the direction of the upper or lower side Torsion spring as a return spring, the system is laterally limited by two guide plates.
- the system for the return spring which is preferably designed as a torsion spring, with one leg of the aforementioned spring on the system
- the guide tabs proposed according to the invention for limiting the system give the intermediate lever excellent guidance in its state clamped in the valve train. Due to the crowning of the system, edge contact of the corresponding leg of the torsion spring during a pivoting movement of the intermediate lever is also avoided.
- a claim also relates to a solution in which the guide tabs are formed from side surfaces of the system.
- the system must have a wing-like attachment on each side, which attachments are then bent towards one another. If necessary, the additional fixing measures mentioned below can be omitted here.
- This embodiment is otherwise not shown in the drawing. Possibly. In this case, it can also be provided in the first-mentioned variant to additionally secure the guide tabs with the system, for example via a welded connection.
- the wells mentioned can, for. B. immediately after punching out the contour of the intermediate lever, for example by an embossing process. However, it is also conceivable to put it through easily or to cut it.
- the cam contact surface is produced as a preferably roller-mounted roller, the friction work in this area is additionally minimized.
- Figure 2 shows the intermediate lever as a blank punch in front of it
- FIGS. 3-5 in a spatial view the intermediate lever with the system according to the invention and the guide tabs.
- the intermediate lever 1 consists of thin-walled sheet metal (steel sheet) and is manufactured in a stamping and bending process.
- FIG. 2 shows the punch blank. If the wing-like lugs lying to the side of the line of symmetry are bent up while maintaining a base area to form a loading end 2 or a sliding surface 7, the final design of the intermediate lever 1 shown in FIGS. 3 to 5 essentially results, but before the bending process mentioned it is it is still necessary to position the system marked "5" approximately orthogonally to the plate, so that after bending, this system 5 already exists between guide tabs 12, 13 thus formed (design according to FIG. 5).
- the intermediate lever 1 generally consists of 2 parallel side walls 19, 20, wherein it has a loading and a pivoting end 2, 3.
- the application end 2 is formed here over its entire length as a sliding surface 7 for contact with a lever-like valve opener such as a rocker arm or rocker arm and is arranged on the end of the intermediate lever 1.
- the swiveling end 3, on the other hand, is designed here with a rotatable roller for engagement in or of eccentric means (s) for changing the position of the intermediate lever 1 (BMW-Valvetronic system).
- the lever has a cam contact surface 4 designed here as a rotatable roller.
- a return spring 6 (see FIG. 1) is provided, which is designed here as a torsion spring, one leg 11 of which rests on the system 5.
- the use of the torsion spring has several advantages, for example also in terms of installation space, as already mentioned in the introduction to the description.
- the intermediate lever 1 is made from a thin-walled sheet metal material in a stamping and bending process.
- the system 5 for the leg 11 of the return spring 6 with lateral guide tabs 12, 13 is created without the use of separate components. Because the system 5 preferably has a spherical shape, there is no edge contact with undesired wear etc. when the intermediate lever 1 pivots.
- the system 5, as can be seen from FIGS. 3 to 5, is curved in the direction of the upper side 8 Extension of the application end 2 produced.
- each guide lug 12, 13 consists of a strip-like extension, which starts from an end face 14 of the system 5 and is bent back like a horn onto the system 5 in the direction of the end 2 of the loading.
- each guide tab 12, 13 is produced as a section projecting away from the upper side 8.
- the guide tabs point approximately orthogonally from the top 8.
- embossed depressions 17, 18 are generated on the inside of the guide tabs 12, 13, for example.
- the system 5 is held in these with its corresponding sides 15, 16. Thus, bending of the system 5 is prevented when the intermediate lever 1 is operated.
- An additional hold can be generated by additional welding or the like in the transition area from the guide plates 12, 13 to the system 5. All in all, there is therefore an intermediate lever 1 which dispenses with the casting design previously used in the prior art and thus has mass advantages. Likewise, the manufacturing costs can be reduced through the sheet metal training. Furthermore, the system 5 with limiting guide tabs 12, 13, which is connected in one piece to the intermediate lever 1, creates an excellent system for the leg 11 of the return spring 6 and the intermediate lever 1 experiences additional guidance in its “clamped” state in a variable, preferably fully variable, valve train.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10260557 | 2002-12-21 | ||
| DE10260557A DE10260557A1 (de) | 2002-12-21 | 2002-12-21 | Zwischenhebel für einen variablen Ventiltrieb einer Brennkraftmaschine |
| PCT/EP2003/014299 WO2004057160A1 (de) | 2002-12-21 | 2003-12-16 | Zwischenhebel für einen variablen ventiltrieb einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1573174A1 true EP1573174A1 (de) | 2005-09-14 |
| EP1573174B1 EP1573174B1 (de) | 2007-02-14 |
Family
ID=32404182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03767808A Expired - Lifetime EP1573174B1 (de) | 2002-12-21 | 2003-12-16 | Zwischenhebel für einen variablen ventiltrieb einer brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7055478B2 (de) |
| EP (1) | EP1573174B1 (de) |
| AU (1) | AU2003292245A1 (de) |
| DE (2) | DE10260557A1 (de) |
| ES (1) | ES2282686T3 (de) |
| WO (1) | WO2004057160A1 (de) |
Families Citing this family (19)
| 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 |
| DE102012222373A1 (de) * | 2012-12-06 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Zwischenhebel |
| 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 |
| DE102016220396A1 (de) * | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016220399A1 (de) | 2016-10-18 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016220401A1 (de) | 2016-10-18 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016220394B3 (de) * | 2016-10-18 | 2017-12-28 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016220397A1 (de) | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016223087A1 (de) | 2016-11-23 | 2017-10-26 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016223086A1 (de) | 2016-11-23 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| DE102016223088A1 (de) | 2016-11-23 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Zwischenhebel eines variablen Ventiltriebs |
| CN114147420B (zh) * | 2020-09-08 | 2025-10-21 | 舍弗勒投资(中国)有限公司 | 内燃机可变行程气门机构的中间臂的主体的制造方法 |
| DE102020123364B4 (de) | 2020-09-08 | 2025-05-22 | Schaeffler Technologies AG & Co. KG | Zwischenhebel aus Blech für einen hubvariablen Ventiltrieb einer Brennkraftmaschine |
| DE102021120356A1 (de) * | 2020-09-08 | 2022-03-10 | Schaeffler Technologies AG & Co. KG | Verfahren zur Herstellung eines Grundkörper eines Zwischenhebels und Zwischenhebel, jeweils für einen hubvariablen Ventiltrieb einer Brennkraftmaschine |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4326331A1 (de) * | 1992-07-15 | 1995-02-09 | Bayerische Motoren Werke Ag | Ventiltrieb einer Brennkraftmaschine |
| EP0638706A1 (de) * | 1993-08-05 | 1995-02-15 | Bayerische Motoren Werke Aktiengesellschaft | 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 |
| US6041747A (en) * | 1997-04-23 | 2000-03-28 | Koyo Seiko Co., Ltd. | Rocker arm |
| DE19721210A1 (de) * | 1997-05-21 | 1998-11-26 | Schaeffler Waelzlager Ohg | Spanlos geformter Schlepphebel |
| DE19913742A1 (de) * | 1999-03-26 | 2000-09-28 | Bayerische Motoren Werke Ag | Vorrichtung zur Hubverstellung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine |
| DE10017441A1 (de) * | 2000-04-07 | 2001-10-11 | Bayerische Motoren Werke Ag | vorrichtung zur Hubverstellung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine |
| DE10059545B4 (de) | 2000-11-30 | 2021-05-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur Herstellung eines hebelartigen Nockenfolgers sowie Blechrohling in Form einer Platine zur Bildung eines hebelartigen Nokkenfolgers |
| ATE272787T1 (de) * | 2001-05-03 | 2004-08-15 | Sts System Technology Services | 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 |
| DE10125082A1 (de) * | 2001-05-23 | 2002-11-28 | Bayerische Motoren Werke Ag | Ventiltrieb-Vorrichtung für eine Brennkraftmaschine |
| EP1267043A1 (de) * | 2001-06-15 | 2002-12-18 | EATON AUTOMOTIVE S.p.A. | Ventilbetätigungsanordnung einer Brennkraftmaschine |
-
2002
- 2002-12-21 DE DE10260557A patent/DE10260557A1/de not_active Withdrawn
-
2003
- 2003-12-16 EP EP03767808A patent/EP1573174B1/de not_active Expired - Lifetime
- 2003-12-16 WO PCT/EP2003/014299 patent/WO2004057160A1/de not_active Ceased
- 2003-12-16 ES ES03767808T patent/ES2282686T3/es not_active Expired - Lifetime
- 2003-12-16 AU AU2003292245A patent/AU2003292245A1/en not_active Abandoned
- 2003-12-16 DE DE50306542T patent/DE50306542D1/de not_active Expired - Lifetime
-
2005
- 2005-06-20 US US11/156,824 patent/US7055478B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004057160A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1573174B1 (de) | 2007-02-14 |
| DE50306542D1 (de) | 2007-03-29 |
| DE10260557A1 (de) | 2004-07-01 |
| ES2282686T3 (es) | 2007-10-16 |
| US7055478B2 (en) | 2006-06-06 |
| AU2003292245A1 (en) | 2004-07-14 |
| US20050241601A1 (en) | 2005-11-03 |
| WO2004057160A1 (de) | 2004-07-08 |
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