EP2917517A1 - Nockenfolger - Google Patents
NockenfolgerInfo
- Publication number
- EP2917517A1 EP2917517A1 EP13771049.7A EP13771049A EP2917517A1 EP 2917517 A1 EP2917517 A1 EP 2917517A1 EP 13771049 A EP13771049 A EP 13771049A EP 2917517 A1 EP2917517 A1 EP 2917517A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam follower
- separate component
- cam
- sliding surface
- lever
- 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 claims abstract description 10
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000002347 wear-protection layer Substances 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
- F01L1/18—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
- F01L13/0005—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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
-
- 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
- F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
-
- 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 a lever-like cam follower, in particular for a valve train of an internal combustion engine, which cam follower a bearing for its pivotally support relative to a cylinder head of the internal combustion engine and at its bottom at one end has a system for a gas exchange valve, the cam follower on its upper side te at least one sliding surface for a mating cam or cam group is immanent.
- cam followers are created without the disadvantages mentioned.
- Their now separate and pivotable about its longitudinal axis sliding surfaces on the separate components are directed simply to the lift cams. It comes in relative misalignment of the sliding surface to your respective Hubnocken (or Hubnockenb in sliding cam systems) no longer to the initially described edge contact with adverse wear and possibly premature failure of the cam follower.
- a profiling, i. H. a spherical design of the sliding surface on the component in cross section be dispensed with. This helps keep manufacturing costs low.
- Another advantage of the separate component is that for this another, possibly more wear-resistant material than for the cam follower base can be selected and that only on this component heat treatment can take place or wear protection layers can be applied.
- a spherical underside facing the cam follower of the component o For example, to provide with a gothic profile and at the same time its counter contour on the cam follower complementary thereto, whereby a Gothic o. ⁇ . Combined profile with a sphere can be.
- the component should either be mounted directly on the pin follower or only via the underside just mentioned.
- FIG. 1 shows a three-dimensional view of a switchable cam follower as a cam follower and the FIGS. 2a, 2b show in a pulled-out illustration the separate component of the cam follower with sliding surface.
- FIG. 1 shows a lever-type cam follower 1 designed as a switchable drag lever for a variable-stroke valve drive of an internal combustion engine.
- the cam follower 1 consists of an outer, box-like lever 18, which in contrast between its longitudinal arms 19 a relatively pivotable and optionally zukoppelbaren inner lever 20 includes.
- Each longitudinal arm 19 of the outer lever 18 has a sliding surface 8 which is substantially planar in cross-section and which is shown on a separate component 9 (see Figures 2a, 2b).
- the separate component 9 is held pivotably about its longitudinal axis to a small extent and is seated in a vaulted receptacle 10 of the cam follower 1 with a complementary complementary counter surface 17.
- the sliding surface 8 can align with the component 9 against the counter-rotating cam and it will be an edge contact avoided (sa description introduction). It is clear that stops on the longitudinal arms 19 may be a Auswindbegrenzung for the component.
- each end face 1 1, 12 of the separate component 9 has a pin-like projection 13, 14.
- the separate component 9 is received in bearing eyes 15, 16 of the cam follower 1.
- the right eye bearing 16 is as a hole and the left bearing eye 15 as in the direction of the top 7 open, in cross-section U-like shell, in which the component 9 is snapped captive over the respective pin 13, after it was previously introduced via its pin 14 in the right bearing eye 16.
- the bearing eye 15 includes the pin by more than 180 °.
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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012220216.1A DE102012220216A1 (de) | 2012-11-07 | 2012-11-07 | Nockenfolger |
| PCT/DE2013/200145 WO2014071928A1 (de) | 2012-11-07 | 2013-08-30 | Nockenfolger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2917517A1 true EP2917517A1 (de) | 2015-09-16 |
| EP2917517B1 EP2917517B1 (de) | 2016-12-28 |
Family
ID=49293409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13771049.7A Not-in-force EP2917517B1 (de) | 2012-11-07 | 2013-08-30 | Nockenfolger |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2917517B1 (de) |
| CN (1) | CN104769239B (de) |
| DE (1) | DE102012220216A1 (de) |
| WO (1) | WO2014071928A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016007486A1 (en) | 2014-07-07 | 2016-01-14 | Eaton Corporation | Switching rocker arm assembly having spring retaining configuration |
| DE102014221947A1 (de) | 2014-10-28 | 2016-04-28 | Schaeffler Technologies AG & Co. KG | Schaltbarer Nockenfolger |
| WO2017024249A1 (en) | 2015-08-05 | 2017-02-09 | Eaton Corporation | Switching rocker arm for internal exhaust gas recirculation |
| CN106183405B (zh) * | 2016-08-31 | 2019-02-05 | 苏州斯莱克精密设备股份有限公司 | 一种金属罐印刷机的油墨单元 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5655488A (en) * | 1996-07-22 | 1997-08-12 | Eaton Corporation | Dual event valve control system |
| JPH10121926A (ja) * | 1996-10-24 | 1998-05-12 | Toyota Motor Corp | 内燃機関におけるバルブリフタ支持構造 |
| JPH10196333A (ja) * | 1997-01-14 | 1998-07-28 | Toyota Motor Corp | バルブリフタ構造 |
| EP1128030A3 (de) * | 1997-04-04 | 2003-02-26 | Toyota Jidosha Kabushiki Kaisha | Verfahren und Vorrichtung zur Messung einer dreidimensionalen Nockenform |
| US7484487B2 (en) * | 2005-11-21 | 2009-02-03 | Eaton Corporation | Dual lift rocker arm latch mechanism and actuation arrangement therefor |
| US7318402B2 (en) * | 2005-11-21 | 2008-01-15 | Eaton Corporation | Dual lift rocker arm latch mechanism and actuation arrangement therefor |
| DE102006033403A1 (de) * | 2006-07-19 | 2008-01-24 | Mahle International Gmbh | Nockentrieb |
| DE102007029465A1 (de) * | 2007-06-26 | 2009-01-08 | Schaeffler Kg | Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
-
2012
- 2012-11-07 DE DE102012220216.1A patent/DE102012220216A1/de not_active Withdrawn
-
2013
- 2013-08-30 WO PCT/DE2013/200145 patent/WO2014071928A1/de not_active Ceased
- 2013-08-30 EP EP13771049.7A patent/EP2917517B1/de not_active Not-in-force
- 2013-08-30 CN CN201380058103.7A patent/CN104769239B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014071928A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012220216A1 (de) | 2014-05-08 |
| CN104769239A (zh) | 2015-07-08 |
| CN104769239B (zh) | 2017-08-08 |
| EP2917517B1 (de) | 2016-12-28 |
| WO2014071928A1 (de) | 2014-05-15 |
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