EP2142767A1 - Schaltbarer tassenstössel - Google Patents
Schaltbarer tassenstösselInfo
- Publication number
- EP2142767A1 EP2142767A1 EP08717882A EP08717882A EP2142767A1 EP 2142767 A1 EP2142767 A1 EP 2142767A1 EP 08717882 A EP08717882 A EP 08717882A EP 08717882 A EP08717882 A EP 08717882A EP 2142767 A1 EP2142767 A1 EP 2142767A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner part
- bore
- coupling piston
- housing
- coupling
- 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
- 230000008878 coupling Effects 0.000 claims abstract description 57
- 238000010168 coupling process Methods 0.000 claims abstract description 57
- 238000005859 coupling reaction Methods 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 17
- 238000013459 approach Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000004049 embossing Methods 0.000 claims description 2
- 210000001061 forehead Anatomy 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000010899 nucleation Methods 0.000 claims 1
- 238000011161 development Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 238000012549 training 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
-
- 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
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- 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
-
- 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
- F01L2307/00—Preventing the rotation of tappets
Definitions
- the invention relates to a switchable bucket tappets for a valve train of an internal combustion engine, having a ring-like cam starting bottom housing, from the outer edge of a shirt and the inner edge of a hollow cylindrical projection protrudes with a bore in which a relatively axially movable to the housing inner part whose underside is a system for a gas exchange valve immanent, wherein in a bore such as a radial bore of the inner part extends at least one coupling piston which is partially engageable with a Mitauerflä- surface of the housing to achieve a full valve lift and wherein between the housing and the Inside part of a lost-motion spring acts.
- Such a bucket tappet is apparent from the considered as generic forming DE 44 92 633 C1. Its coupling mechanism is located immediately below the floor area.
- the person skilled in the art recognizes that the previously known bucket tappet is of relatively complicated construction and thus its manufacture proves to be unnecessarily cost-intensive.
- the outer part is not formed symmetrically in the bottom area, since below the annular bottom guide holes for the coupling piston are applied. That too is Inner part unnecessarily massive and complicated. Due to the aforementioned massive training, the oscillating valve train masses are increased.
- the piston coupling leads to a relatively large surface pressure in the coupling region, it can also cause unnecessary edge wear in the "retraction" of the coupling piston.
- the object of the invention is therefore to provide a switchable valve train part of the aforementioned type, in which the cited disadvantages are eliminated by simple means.
- this object is achieved in that in the bore of the neck, only in the peripheral portion of the coupling piston, a sickle-like material release is applied, at the top of the Mitneh- mer arrangements extends and whose vertex is located radially outside an outer shell of the approach, wherein the coupling piston in the coupling direction via the force of a force acting against the inner end pressure medium as at least a helical compression spring and in Entkoppelraum over ahead of the outer end conductive hydraulic fluid is displaceable, which hydraulic fluid via a feed on the outer jacket of the approach directly in front of the outer end of the coupling piston is conductive and extending between the housing and the inner part of a rotation.
- the material releases should be generated, for example, by disk milling or boring. Conceivable, however, is also a non-cutting production by embossing, batch-wise through etc.
- the coupling pistons are flattened on their upper side in the engagement region.
- an anti-rotation lock is applied between the housing and the inner part.
- a body such as a needle, which communicates radially inwardly with a corresponding longitudinal groove on the outer surface of the inner part.
- a displacement of the coupling piston inwardly is preferably provided via hydraulic medium pressure, wherein the hydraulic fluid can be conducted in front of outer bulbs of the coupling piston in the region of the sickle-like material recesses.
- the hydraulic fluid can be conducted in front of outer bulbs of the coupling piston in the region of the sickle-like material recesses.
- the coupling piston with flattening it is provided to provide it in its bore in the inner part with a rotation.
- a simple ring member such as a snap ring, which is placed on the flattenings of the coupling piston and extends circumferentially outside the coupling piston in an annular groove on the outer surface of the inner part.
- the inner part thin-walled tube-like form and to apply the radial bore for the coupling piston only in a simple radial web of the inner part.
- an inner part which is particularly inexpensive to produce and whose mass is lowered compared to known interior elements.
- the production of the housing is simplified, which can be prepared for example in a thermoforming process and its mass compared to previously executed tappets is also lowered.
- the hydraulic fluid can frontally in front of the coupling piston, inwandig the approach, are heranminister.
- a thin-walled sheet-metal part (possibly also a plastic part) is applied inside the housing, into which corresponding channels for supplying the hydraulic fluid, starting from at least one passage in the shirt, are applied. Possibly. These channels or portions of these channels may also be formed in the housing.
- the proposed tappet may be provided with a hydraulic clearance compensator. However, it is also conceivable to provide this with mechanical clearance compensation measures known per se.
- the bucket tappet according to the invention is provided to design the bucket tappet according to the invention as a so-called “deactivating tappet", so that only the housing is acted upon by one or two high-lift cams itself to close the inner tappet on the bottom side, so that there is a possibility to start for a low-lift or zero-lift cam.
- FIGS 1 to 4 show in corresponding sectional views a first variant of a switchable bucket tappet in which the sickle-like material exemptions in the approach this does not pierce and Figures 5 to 8 disclose a bucket tappet as mentioned above, but in which the sickle-like material exits in the approach pierced.
- a switchable tappet 1 This has a hollow cylindrical housing 3, which is closed by a ring-like cam starting bottom 2. From an outer edge 4 of the cam starting floor 2, a thin-walled shirt 5 extends from an inner edge 6 of the cam base 2 is a dome-like approach 7 away. In a bore 8 of the projection 7, a tube-like inner part 9 with its outer jacket 37 is received relatively axially movable thereto. The inner part 9 has approximately in the region of its center a radial web 38, with a radially continuous bore 11. As can be seen, run in the bore 11 of the inner part 9, two diametrically opposite coupling piston 12. It is in the figures 1, 5 each of the coupling state of the tappet 1 is disclosed. The aforementioned coupling pistons 12 are acted upon radially outward by the force of a pressure means 20, which is designed here as a helical compression spring, which acts against the inner end stems 19.
- a pressure means 20 which is designed here as a helical compression spring, which acts against the inner end
- the coupling pistons 12, starting from their outer forks 21, are provided on their upper sides 33 with section-wise flattenings 34.
- a rotation lock 35 On the flats 34 is a rotation lock 35, which is here designed as a thin-walled ring member and circumferentially offset from the coupling piston 12 in an annular groove 36 on the outer irrimantel 37 of the inner part 9 sits.
- other anti-rotation devices for the coupling piston 12, for example, pin-like or flattened are also conceivable at this point.
- the anti-rotation device 35 which also draws from FIG. 3, for example, can be formed all-round or only partially encircling with all-round or partially circumferential annular groove 36.
- the anti-rotation device 35 can be formed all-round or only partially encircling with all-round or partially circumferential annular groove 36.
- the annular groove 36 may also be shown so that it does not intersect the longitudinal groove 40.
- a driver surface 13 is positioned on the side of each coupling piston 12.
- the driver surface 13 is part of a sickle-like in plan view Materialfrei ein 15 and extends to the respective top 16.
- the sickle-like Materialfrei ein 15 is designed so that the vertex 17 is located radially within the neck 7, this does not pierced.
- the vertex 17 of the sickle-like material relief 15 pierces an outer jacket 18 of the attachment 7, however, and thus lies radially outside of it.
- the material release 15 can be made in both variants, for example with a simple disc milling cutter.
- a thin-walled element 28 is attached in the interior of the housing 3. This consists for example of thin-walled steel sheet and largely follows an inner contour of the housing 3.
- the shirt 5 has a passage 29, from which the hydraulic fluid is passed via a formed in the element 28 riser channel 30 in the bottom direction. Below the cam starting floor 2, the riser channel 30 opens into one or more radial passages 31, which may be formed either in the element 28 or in the underside of the cam follower base 2.
- the respective radial passage 31 communicates with a feed 22 extending on the outer casing 18 of the projection 7 in the distance away from the bottom.
- the feed 22 extends circumferentially approximately at 90 ° to the radial bore 11 in the inner part 9 (see Figure 3).
- the projection 7 in this case has a passage 25, from which the hydraulic fluid is further directed into a segment or belt-like channel 26 in the bore 8 of the projection 7.
- the channel 26 has a lower height than the Materialoko einen 15. End side of the segment-like channel 26 is connected to the material exemptions 15.
- the hydraulic fluid can also be conveyed via the outer jacket 18 of the attachment 7, as described for the following variant (FIGS. 5 to 8).
- the feed 22 on the outer jacket 18 of the attachment 7, in the circumferential section of each material release 15, is shaped into the thin-walled element 28.
- the hydraulic fluid is virtually passed directly in front of the outer brackets 21 of the coupling piston 12, wherein It can be seen that the vertex 17 of the material release 15 is located radially outside of the outer jacket 18 of the projection 7, thus a "breakthrough" is created here.
- the bucket tappet 1 is guided over a component 41 introduced into its shirt 5, such as a needle, in a manner secured against rotation in its corresponding receptacle of the internal combustion engine.
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)
- Multiple-Way Valves (AREA)
- Fluid-Driven Valves (AREA)
- Control And Safety Of Cranes (AREA)
- Keying Circuit Devices (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91034407P | 2007-04-05 | 2007-04-05 | |
| DE102007016740A DE102007016740A1 (de) | 2007-04-07 | 2007-04-07 | Schaltbarer Tassenstößel |
| PCT/EP2008/053145 WO2008122487A1 (de) | 2007-04-05 | 2008-03-17 | Schaltbarer tassenstössel |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2142767A1 true EP2142767A1 (de) | 2010-01-13 |
| EP2142767B1 EP2142767B1 (de) | 2010-07-28 |
| EP2142767B9 EP2142767B9 (de) | 2010-09-15 |
Family
ID=39736267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08717882A Not-in-force EP2142767B9 (de) | 2007-04-05 | 2008-03-17 | Schaltbarer tassenstössel |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2142767B9 (de) |
| KR (1) | KR101465281B1 (de) |
| CN (1) | CN101720382B (de) |
| AT (1) | ATE475785T1 (de) |
| DE (2) | DE102007016740A1 (de) |
| WO (1) | WO2008122487A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886561B (zh) * | 2010-06-30 | 2012-05-23 | 芜湖杰锋汽车动力系统有限公司 | 一种发动机机械式熄缸挺柱 |
| DE102012209186A1 (de) * | 2012-05-31 | 2013-12-05 | Schaeffler Technologies AG & Co. KG | Stößel für einen Ventil- oder Pumpentrieb, sowie Verfahren zur Herstellung eines Stößels |
| US11187119B2 (en) | 2019-09-16 | 2021-11-30 | Eaton Intelligent Power Limited | Latch pin for use in valve lifter and valve lifter |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2983991A (en) * | 1956-02-23 | 1961-05-16 | Chrysler Corp | Valve tappet and method of making |
| US2963011A (en) * | 1959-06-29 | 1960-12-06 | Gen Motors Corp | Valve lifter |
| DE4206166B4 (de) * | 1991-03-14 | 2004-11-04 | Volkswagen Ag | Variabler Ventiltrieb für ein Hubventil einer Maschine |
| US5361733A (en) * | 1993-01-28 | 1994-11-08 | General Motors Corporation | Compact valve lifters |
| GB9306221D0 (en) * | 1993-03-25 | 1993-05-19 | Lotus Car | Valve control means |
| DE4314619A1 (de) | 1993-05-04 | 1994-11-10 | Schaeffler Waelzlager Kg | Stößel |
| DE4428309A1 (de) * | 1993-08-24 | 1995-03-02 | Schaeffler Waelzlager Kg | Tassenförmiger Ventilstößel |
| DE19804952A1 (de) * | 1998-02-07 | 1999-08-12 | Daimler Chrysler Ag | Abschaltbarer Ventiltrieb für ein Gaswechselventil einer Brennkraftmaschine |
| DE19844202A1 (de) * | 1998-09-26 | 2000-03-30 | Schaeffler Waelzlager Ohg | Schaltbarer Nockenfolger |
| US6321704B1 (en) * | 1999-02-23 | 2001-11-27 | Eaton Corporation | Hydraulically actuated latching valve deactivation |
| DE19915532B4 (de) * | 1999-04-07 | 2009-05-20 | Schaeffler Kg | Schaltbares Ventiltriebsglied |
| DE10135175A1 (de) * | 2001-07-19 | 2003-02-06 | Ina Schaeffler Kg | Schaltbarer Tassenstößel |
| DE102005020580B4 (de) * | 2005-05-03 | 2017-06-14 | Schaeffler Technologies AG & Co. KG | Schaltbarer Nockenfolger |
| DE102005054372A1 (de) * | 2005-11-15 | 2007-05-16 | Schaeffler Kg | Schaltbarer Stößel eines Ventiltriebs einer Brennkraftmaschine |
-
2007
- 2007-04-07 DE DE102007016740A patent/DE102007016740A1/de not_active Withdrawn
-
2008
- 2008-03-17 DE DE502008001047T patent/DE502008001047D1/de active Active
- 2008-03-17 EP EP08717882A patent/EP2142767B9/de not_active Not-in-force
- 2008-03-17 CN CN200880011465XA patent/CN101720382B/zh not_active Expired - Fee Related
- 2008-03-17 KR KR1020097020713A patent/KR101465281B1/ko not_active Expired - Fee Related
- 2008-03-17 AT AT08717882T patent/ATE475785T1/de active
- 2008-03-17 WO PCT/EP2008/053145 patent/WO2008122487A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008122487A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101720382B (zh) | 2013-12-04 |
| CN101720382A (zh) | 2010-06-02 |
| EP2142767B1 (de) | 2010-07-28 |
| ATE475785T1 (de) | 2010-08-15 |
| KR101465281B1 (ko) | 2014-11-26 |
| DE102007016740A1 (de) | 2008-10-09 |
| DE502008001047D1 (de) | 2010-09-09 |
| WO2008122487A1 (de) | 2008-10-16 |
| KR20100015365A (ko) | 2010-02-12 |
| WO2008122487A9 (de) | 2009-12-03 |
| EP2142767B9 (de) | 2010-09-15 |
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