WO2011063780A2 - Nockenwelle - Google Patents
Nockenwelle Download PDFInfo
- Publication number
- WO2011063780A2 WO2011063780A2 PCT/DE2010/001245 DE2010001245W WO2011063780A2 WO 2011063780 A2 WO2011063780 A2 WO 2011063780A2 DE 2010001245 W DE2010001245 W DE 2010001245W WO 2011063780 A2 WO2011063780 A2 WO 2011063780A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sections
- carrier
- cam
- carrier sections
- camshaft
- Prior art date
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—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
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/04—Adjustable cams
-
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- 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
- F01L2013/0052—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 with cams provided on an axially slidable sleeve
-
- 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 camshaft having at least one
- Carrier element and with at least one cam.
- a camshaft has at least one carrier element, also referred to as tube or shaft, and at least one cam.
- camshafts serve as part of the valvetrain, with the support member rotating about its longitudinal axis. The cams convert the
- Outlet valves of the engine are controlled. In order to control the engine better depending on the load condition, there are so-called in the prior art.
- Camshaft adjusters which bring different cams into operative engagement with the valves or adjust the settings, e.g. change the angles of the cams to each other.
- the invention has for its object to propose a camshaft, which offers a possibility alternative to the prior art for adjusting the cam.
- the carrier element or the shaft has at least two components or carrier sections that are axially parallel to one another
- cams can be displaced relative to the valves or the valves can be brought into contact with differently configured cams.
- the move in itself results as a rolling on the rolling body, for example, rollers or balls, which, for example, radially between the sections coaxially with each other
- the carrier sections are arranged.
- the rolling elements are guided in the guide grooves or tracks of the carrier sections.
- the guide grooves are axially parallel to the longitudinal axis.
- a plurality of guide grooves are preferably provided, which each
- the guide grooves of the support sections are preferably associated with each other and each form pairs.
- At least one ball cage is provided, wherein the ball cage holds the at least one rolling body.
- the ball cage for example, ensures a sufficient distance between successively, e.g. Rollers arranged in a raceway. Furthermore, can be held by a ball cage rolling elements in different tracks in the same plane.
- An embodiment provides that at least one of the at least two carrier sections on an inner side and / or on an outer side
- the limit stop limits the axial displacement path of at least one rolling body within a guide groove or within a pair of guide grooves. It is thus virtually a stop, which limits the displacement of at least two support sections on the one hand and on the other possibly also prevents the rolling body or the rolling bodies from falling out of the area between two support sections.
- Limit stops preferably run essentially radially, so that they each protrude into the tracks of the rolling bodies.
- the rolling bodies by stops in their course stopped. That is, the guide grooves are preferably closed at two ends in the radial direction at least for the path of the rolling bodies.
- a limit stop can also be formed by a radially inwardly or outwardly extending wall portion. In an alternative or additional embodiment, the stops are given, for example, by rings held in grooves.
- An embodiment provides that at least one of the at least two carrier sections is designed substantially tubular.
- Embodiment includes that at least one of the at least two support portions is at least partially hollow.
- An embodiment includes that at least one alternative cam is provided, and that the alternative cam is arranged on the carrier element. At least the cam and the alternative cam are thus arranged on the carrier element.
- This designation is intended to represent, for example, the cams of a valve, which respectively produce a different opening behavior of the valve and which are brought into contact with the valve by the axial displacement of the carrier sections.
- a "set" of different camshafts is provided for each valve of the engine in which the camshaft is used, in one variant the cam and the alternative cam or the alternate cams are individual cams and, in an alternative embodiment, are sections of one one-piece
- Cam element which has sections different cam contours.
- a cam or alternative cam is designed such that it causes a shutdown of a cylinder.
- An embodiment provides that the alternative cam and the cam are arranged on one of the at least two carrier sections. In this Design are thus the cam and the alternative cam on the same support section.
- An embodiment includes that the alternative cam and the cam are each arranged on one of the at least two carrier sections. In this embodiment, thus are the cam and the
- Alternative cams on different support sections but preferably on adjacently arranged support sections.
- An embodiment provides that the cam and the alternative cam with respect to their geometry and / or with respect to the radial orientation on the support element are different from each other.
- Displacement of the support sections can thus different cams move axially and push in operative contact with the valves.
- different cams and alternative cams are provided, which each cause a different closing behavior of the cylinder.
- the cams are brought into operative contact with the respective cylinders by the
- Carrier sections on which the cams or alternative cam are located are shifted from each other. In this case, it is possible, for example, to move only selected carrier sections and to change the cams located thereon relative to the respective cylinders. Not all cylinders must be controlled the same by the invention, but they can be controlled individually or in groups. For example, the shutdown of cylinders or groups of
- Camshaft according to the invention allows an adjustment of individual cam or cam groups.
- An embodiment includes that only a single carrier element is provided, which consists of at least two carrier sections. In This configuration, the cams are thus of a single carrier element.
- Carrier element i. only carried by a single shaft. This in the
- FIG. 2 shows an enlarged detail of the camshaft of FIG. 1.
- Fig. 1 shows a section through a erfindunbe camshaft. It consists of a support element 1, a so-called. Wave, which here in the
- the carrier element 1 consists of a plurality of carrier sections 3, which are each introduced in sections.
- the carrier sections 3 are designed and connected to one another in such a way that the carrier element 1 has a course with a substantially identical outside diameter.
- Radial between each two concentrically arranged support sections 3 are each in a ball cage 8 rolling elements 4, via which the support sections 3 can be moved axially to each other along the longitudinal axis 10.
- the ball cage 8 holds the rolling elements 4 in a plane and at a sufficient distance from each other.
- two groups of three cams are provided here by way of example in each case. These cams are referred to as cam 2 and alternative cam 7. However, this is only for explanation. It is essential that each differently configured and / or differently oriented cam on
- Carrier sections 3 to be distributed.
- the application the
- Carrier sections 3 by a corresponding device - for example, hydraulically or by gripping elements or electromagnetically, from the inside or from the outside - axially displaced, so that in each case different cams drive the valves.
- the support sections 3 are thereby moved together or individually axially, wherein they each temporarily by a
- Fixing device 9 can be axially fixed to each other.
- Fixing devices 9 engage in the example shown here, on the one hand in a groove of the carrier portion arranged inside and on the other hand, depending on the displacement of the carrier sections to each other in one of the three grooves of the outer support portion.
- This is, for example, a resilient element which has a suitable mechanism - e.g. mechanical, magnetic, etc. - can be operated while, for example, a ball or any body shifts.
- the fixing devices 9 are operated in particular by a - not shown here - control unit.
- further stops are possibly provided, against which the displacements take place.
- For the displacement of individual carrier sections 3 are in one
- Embodiment in each case at least two fixing devices 9 and their controls for moving functionally coupled together. It can be seen at the ends of the individual carrier sections 3 each have a recess, via which the carrier element 1 is stored, for example. 2 shows a detail of the variant of FIG. 1.
- the carrier sections 3 are each hollow and substantially cylindrical. They have a widened region in which they overlap one another and in which the rolling bodies 4 are arranged.
- the support section 3 in the widening with a larger diameter has a guide groove 5 which, for example as a track, extends axially along the longitudinal axis 10. The expansion is followed axially by an area with one smaller outer diameter.
- cams 2 and alternative cams 7 are fastened in this variant on the area with a larger outer diameter, for example via interference fit, positive locking, welding, soldering or adhesive bonding or over a widening of the support element 1.
- each outer support portion 3 acts here as a limit stop 6 for the rolling elements 4 and thus also for the displacement of the support sections 3 to each other. Only two pairs of guide grooves 5 can be seen here. Preferably, further pairs are arranged symmetrically around the carrier sections 3. In a further embodiment, the cams 2, 7 partially on the
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10798468A EP2504115A2 (de) | 2009-11-26 | 2010-10-22 | Segmentierte nockenwelle |
BR112012012527A BR112012012527A2 (pt) | 2009-11-26 | 2010-10-22 | eixo de cames |
CN2010800532535A CN102740993A (zh) | 2009-11-26 | 2010-10-22 | 凸轮轴 |
US13/480,056 US8607749B2 (en) | 2009-11-26 | 2012-05-24 | Camshaft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009055868A DE102009055868A1 (de) | 2009-11-26 | 2009-11-26 | Nockenwelle |
DE102009055868.3 | 2009-11-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/480,056 Continuation US8607749B2 (en) | 2009-11-26 | 2012-05-24 | Camshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011063780A2 true WO2011063780A2 (de) | 2011-06-03 |
WO2011063780A3 WO2011063780A3 (de) | 2011-09-15 |
Family
ID=43927103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2010/001245 WO2011063780A2 (de) | 2009-11-26 | 2010-10-22 | Nockenwelle |
Country Status (6)
Country | Link |
---|---|
US (1) | US8607749B2 (de) |
EP (1) | EP2504115A2 (de) |
CN (1) | CN102740993A (de) |
BR (1) | BR112012012527A2 (de) |
DE (1) | DE102009055868A1 (de) |
WO (1) | WO2011063780A2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009037270B4 (de) | 2009-08-10 | 2011-04-07 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Ventiltrieb für Brennkraftmaschinen zur Betätigung von Gaswechselventilen |
DE102009037268B3 (de) * | 2009-08-10 | 2011-04-07 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variabler Ventiltrieb für Brennkraftmaschinen zur Betätigung von Gaswechselventilen |
DE102011000510B4 (de) | 2011-02-04 | 2019-03-28 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Schiebenockensystem mit Linearlager |
DE102011051480B4 (de) * | 2011-06-30 | 2014-11-20 | Thyssenkrupp Presta Teccenter Ag | Nockenwelle mit axial verschiebbarem Nockenpaket |
US9638306B2 (en) * | 2012-05-18 | 2017-05-02 | Schaeffler Technologies AG & Co. KG | Camshaft unit |
DE102013007741A1 (de) * | 2013-05-07 | 2014-11-13 | Thyssenkrupp Presta Teccenter Ag | Nockenwelle |
DE102014104994A1 (de) * | 2014-04-08 | 2015-10-08 | Thyssenkrupp Presta Teccenter Ag | verstellbare Nockenwelle |
DE102014014659B3 (de) | 2014-10-08 | 2016-01-14 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Zylinderkopf einer Brennkraftmaschine mit wenigstens einer Nockenwelle |
DE102017127044B4 (de) * | 2017-11-16 | 2024-07-04 | Thyssenkrupp Ag | Schiebenockenelement, Nockenwelle und Verfahren zur Herstellung eines Schiebenockenelements |
DE102018217635B3 (de) * | 2018-10-15 | 2020-03-26 | Audi Ag | Ventiltrieb für eine Brennkraftmaschine |
CN113565943B (zh) * | 2021-07-27 | 2022-08-09 | 无锡职业技术学院 | 一种轮廓可变的数字化柔性移动凸轮机构 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3803683A1 (de) * | 1988-02-07 | 1989-08-17 | Emitec Emissionstechnologie | Gebaute welle, insbesondere nockenwelle, kurbelwelle oder getriebewelle |
DE4236655A1 (de) * | 1992-10-30 | 1994-05-05 | Porsche Ag | Ventilantrieb für eine Brennkraftmaschine |
JP3198762B2 (ja) * | 1993-10-30 | 2001-08-13 | スズキ株式会社 | 内燃機関の可変動弁装置 |
DE19606732C2 (de) * | 1995-02-27 | 2001-11-08 | Emitec Emissionstechnologie | Gefügte Mehrlagenwellen |
JP3572715B2 (ja) * | 1995-04-18 | 2004-10-06 | スズキ株式会社 | 多気筒4サイクルエンジンのカムシャフト軸受構造 |
GB2375583B (en) * | 2001-05-15 | 2004-09-01 | Mechadyne Internat Plc | Variable camshaft assembly |
DE102004033800A1 (de) * | 2004-07-12 | 2006-02-16 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Ventiltrieb für eine Brennkraftmaschine |
DE102004037198A1 (de) | 2004-07-30 | 2006-03-23 | Ina-Schaeffler Kg | Ventiltrieb einer Brennkraftmaschine |
GB2434404B (en) * | 2006-01-18 | 2010-11-03 | Powertrain Technology Ltd | Improvements to variable valve actuation using slideable, latching cam lobes |
DE102008007255A1 (de) * | 2007-02-23 | 2008-08-28 | Schaeffler Kg | Schaltbarer Ventiltrieb für Ladungswechselventile von Brennkraftmaschinen |
DE102007027979B4 (de) * | 2007-06-19 | 2015-07-23 | Audi Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit Nockenwellen-Tunnellager |
DE102008024876B4 (de) * | 2008-05-23 | 2019-05-16 | Audi Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit verschiebbaren, stirnseitig gelagerten Nockenträgern |
DE102008024875B4 (de) * | 2008-05-23 | 2019-05-09 | Audi Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit verschiebbaren Nockenträgern und gegenseitiger Abstützung benachbarter Nockenträger |
DE102008028513A1 (de) | 2008-06-16 | 2009-12-24 | Audi Ag | Ventilbetrieb für Gaswechselventile einer Brennkraftmaschine mit doppelt abgestützten Nockenträgern |
-
2009
- 2009-11-26 DE DE102009055868A patent/DE102009055868A1/de not_active Withdrawn
-
2010
- 2010-10-22 BR BR112012012527A patent/BR112012012527A2/pt not_active IP Right Cessation
- 2010-10-22 CN CN2010800532535A patent/CN102740993A/zh active Pending
- 2010-10-22 WO PCT/DE2010/001245 patent/WO2011063780A2/de active Application Filing
- 2010-10-22 EP EP10798468A patent/EP2504115A2/de not_active Withdrawn
-
2012
- 2012-05-24 US US13/480,056 patent/US8607749B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
BR112012012527A2 (pt) | 2016-05-03 |
EP2504115A2 (de) | 2012-10-03 |
US8607749B2 (en) | 2013-12-17 |
US20120227689A1 (en) | 2012-09-13 |
WO2011063780A3 (de) | 2011-09-15 |
CN102740993A (zh) | 2012-10-17 |
DE102009055868A1 (de) | 2011-06-01 |
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