US20140165935A1 - Camshaft - Google Patents
Camshaft Download PDFInfo
- Publication number
- US20140165935A1 US20140165935A1 US14/133,124 US201314133124A US2014165935A1 US 20140165935 A1 US20140165935 A1 US 20140165935A1 US 201314133124 A US201314133124 A US 201314133124A US 2014165935 A1 US2014165935 A1 US 2014165935A1
- Authority
- US
- United States
- Prior art keywords
- function
- function device
- flat
- camshaft
- function elements
- 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.)
- Abandoned
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 30
- 238000010168 coupling process Methods 0.000 claims description 30
- 238000005859 coupling reaction Methods 0.000 claims description 30
- 238000005304 joining Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims 2
- 238000005476 soldering Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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
- 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
- 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
-
- 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
- F01L2001/0475—Hollow camshafts
Definitions
- the present invention relates to a camshaft of an internal combustion engine having at least one function device connected therewith via a shaft-hub connection according to the preamble of claim 1 .
- the invention additionally relates to a function device for such a camshaft and to an internal combustion engine having at least one such camshaft.
- camshafts are thoroughly known, just as connecting function elements to such camshafts, for example via a thermal joining fit.
- function devices such as for example gear wheels, drive wheels, cams, pump actuating devices, such as for example pump cams for a high-pressure pump or an Oldham coupling for the rotary connection of vacuum or oil pumps are connected to the camshaft by way of pressed-in or thermally joined plugs up to now.
- a separate function element such as for example gear wheels or cams are required here, which for this purpose still have to be joined in a different way if need be.
- the present invention therefore deals with the problem of stating an improved embodiment for a camshaft of the generic type, which is characterized in particular by a simplified production.
- the present invention is based on the general idea of equipping a function device on a camshaft with at least two different function elements, which can each fulfil different functions.
- the function elements combined in the function device in this case are connected to the camshaft via a shaft-hub connection, for example via a thermal joining fit or a longitudinal press fit.
- the principle idea thus consists in combining or integrating as many function elements as possible—however, at least two—in a common function device and merely having to join this common assembly, i.e. the function device, to the camshaft or a camshaft tube. This offers substantial advantages, for example in the region of the weight, since a function device which is put together of a plurality of function elements is significantly lighter in construction weight than function elements that are each separately assembled.
- the function device according to the invention additionally makes possible a higher torque transmission than can be realised with a plug having a smaller internal diameter.
- the assembly is substantially simplified since all function elements no longer have to be separately, i.e. individually, joined to the camshaft, but merely the function device, in which the individual function elements are already aligned correctly to one another with respect to an angle of rotation.
- This is a major advantage in particular if a camshaft is assembled within a cylinder head cover, since according to common knowledge only very little working space is available there.
- a further advantage can be seen in an optimised weight distribution, for example through masses which are opposed to a drive belt pulley, so that the function device can be utilised for offsetting unbalances at the same time.
- At least one function element is a gear wheel, in particular a coupling gear wheel, a cam, a pump actuating device, for example in the manner of a cam, an encoder wheel, a belt pulley, a coupling, in particular an Oldham coupling, or a chain wheel.
- a gear wheel in particular a coupling gear wheel, a cam, a pump actuating device, for example in the manner of a cam, an encoder wheel, a belt pulley, a coupling, in particular an Oldham coupling, or a chain wheel.
- the function device is formed in one piece, in particular as a one-piece sintered component.
- the individual function elements of the function device are thus connected to one another as one piece, so that the function device can be completely formed in one piece.
- This makes possible in particular a rational production of the function device, since an aligned joining together of the individual function elements into the function device can be omitted.
- the individual function elements of the function device are connected to one another in a fixed manner, in particular welded, soldered, screwed or glued together.
- the separate formation of the individual function elements offers the major advantage that the function device is extremely flexibly assemblable with respect to the individual function elements.
- the individual function elements in this case can be connected into the continuous function device via a friction welding connection or by means of laser welding.
- positioning aids can be additionally provided on the individual function elements, which allow fixing of the individual function elements on one another exclusively in a predefined angular position.
- Such positioning aids can for example be formed as a single flat, for example as a clear grind, or as a multiple flat, in particular as a dual flat or triple flat.
- a function element thus has such a single or multiple flat as well as an associated complementary recess arranged on the opposite face end, as a result of which an angularly aligned axial inserting into one another of the individual function elements into the common function device is very easily possible.
- the positioning aids can be alternatively formed also as a pin or associated opening, which allows a joining together of two function elements in merely one single or a plurality of predefined angular positions. These positioning aids can obviously be additionally utilised also for further adjusting and positioning operations after the assembly of the camshaft, for example when installing the camshaft in the cylinder head.
- a pump can for example be coupled to the cylinder head to the outside via this.
- Such an Oldham coupling makes possible a coupling, in which the torque is transmitted between two parallel shafts.
- it consists of three discs, wherein the outer two are fastened on the respective shafts or on the pump and on the function element and the middle one is mounted with respect to the two other discs in two slot and key connections which are positioned orthogonally to one another.
- Such an Oldham coupling makes possible in particular compensating for minor parallel offsets between the camshaft and an axis of the pump, as a result of which at least minor production inaccuracies can be offset without problems, so that the entire construction altogether allows greater production tolerances.
- FIG. 1 a sectional representation through a camshaft with a function device according to the invention in an internal combustion engine
- FIG. 2 a partially sectioned view of an internal combustion engine according to the invention in the region of two camshafts with the function device according to the invention
- FIG. 3 a representation as in FIG. 2 , however with bearing bridges
- FIG. 4 different views of an a sectional representation through an embodiment of a function device according to the invention
- FIG. 5-7 function devices in each case with different function elements.
- a camshaft 1 of an internal combustion engine 2 comprises at least one function device 3 that is connected to the camshaft 1 via a shaft-hub connection, in particular via a press fit connection, which is put together of at least two different function elements 4 .
- the individual function elements 4 in this case fulfil different functions and are merely combined in the common function device 3 to simplify the assembly.
- At least one function element 4 in this case can for example be formed as a gear wheel 5 , in particular as a coupling gear wheel, as a cam, as a pump actuating device, as an encoder wheel 6 , as a belt pulley, as a coupling 7 , in particular as an Oldham coupling, or as a chain wheel 5 ′.
- the function device 3 represented according to FIG. 1 thus has three function elements 4 , namely the coupling 7 , the chain wheel 5 ′ or gear wheel 5 as well as the encoder wheel 6 .
- the production of the camshaft 1 is clearly simplified, since all function elements 4 no longer have to be separately joined to the camshaft 1 but merely a common function device 3 , as a result of which the joining process can be significantly rationalised.
- the function device 3 with a plurality of function elements 4 is additionally lighter in weight than the respective separate function elements 4 , as a result of which a weight saving can be achieved, which in turn has a positive effect on the fuel consumption.
- the function device 3 Compared with a plug, the function device 3 according to the invention additionally makes possible a higher torque transmission, since via the transverse press fit, for example produced by means of thermal joining, or a longitudinal press fit, a larger force-transmitting contact area can be created.
- the combined arrangement of a plurality of function elements 4 in a common function device 3 additionally offers major advantages in particular in the assembly of the function device 3 in a cover or a cylinder head 8 , since extremely confined space conditions are usually encountered there.
- FIG. 2 a view is shown from the top of the cylinder head 8 of the internal combustion engine 2 with two camshafts 1 , wherein on the lower camshaft 1 the function device 3 according to the invention is arranged.
- the latter in turn, combines three function elements 4 , namely the coupling 7 , a gear wheel 5 , in the manner of a coupling gear wheel for coupling to the second camshaft 1 , as well as the encoder wheel 6 .
- Mounting the camshafts 1 on the cylinder head 8 in this case is effected by means of a bearing frame 9 , which is connected to the cylinder head 8 , i.e. an engine block, via screws 10 .
- a pump 11 for example can be coupled to the camshaft 1 in a rotation-transmitting manner.
- the Oldham coupling in this case makes possible an at least minor parallelism of the axes of the camshafts 1 and the axis of the pump, as a result of which the production precision need not be as high as without such an Oldham coupling.
- the function device 3 is formed in one piece, in particular as a one-piece sintered component, so that a separate and prior assembly of the individual function elements 4 into the common function device 3 can be omitted.
- the individual function elements 4 of the function device 3 can also be alternatively produced separately and subsequently connected to one another into the common function device 3 in a fixed manner, in particular welded, soldered, screwed or glued together.
- a function device 3 is shown for example, which integrates two function elements 4 , namely the gear wheel 5 and the coupling 7 in one piece.
- a further function element 4 for example an encoder wheel 6 , could now be additionally attached or welded on.
- positioning aids 12 can be provided on the individual function elements 4 , which allow fixing of the individual function elements 4 to one another exclusively in a predefined angular position.
- the positioning aid 12 in this case is formed as a two-flat, wherein for example the encoder wheel 6 has a recess that is complementary thereto, in order to make thus possible an angularly orientated fixing.
- the positioning aid 12 in this case can also be formed as a single flat or as a multiple flat, in particular also as a triple flat.
- all other non-round shapes are obviously also conceivable for the accurate angular fixing of the individual function elements 4 on one another.
- a plurality of functions in the form of different function elements 4 can thus be combined and in the manner of a common function device 3 , fixed on the camshaft 1 in a single operation. Because of this, not only the assembly operation can be significantly rationalised, but a cost-effective production achieved at the same time.
- the major advantage is additionally obtained that compared with a plug, higher torques can be transmitted and in particular an assembly of the function device 3 is possible even with comparatively little working space. Above all, this offers the possibility of keeping the function device 3 according to the invention with the individual function elements 4 in a cover and subsequently slide the camshaft tube through the function elements 4 and the individual bearing points for example of the bearing frame 9 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Laser Beam Processing (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012223811.5A DE102012223811A1 (de) | 2012-12-19 | 2012-12-19 | Nockenwelle |
DE102012223811.5 | 2012-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140165935A1 true US20140165935A1 (en) | 2014-06-19 |
Family
ID=49626829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/133,124 Abandoned US20140165935A1 (en) | 2012-12-19 | 2013-12-18 | Camshaft |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140165935A1 (ja) |
EP (1) | EP2746545B1 (ja) |
JP (1) | JP2014122627A (ja) |
CN (1) | CN103967548A (ja) |
DE (1) | DE102012223811A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140283773A1 (en) * | 2011-12-10 | 2014-09-25 | Volkswagen Aktiengesellschaft | Adjustable camshaft drive |
WO2017029095A1 (de) * | 2015-08-17 | 2017-02-23 | Thyssenkrupp Presta Teccenter Ag | Modulbaugruppe |
US20180065205A1 (en) * | 2016-09-07 | 2018-03-08 | Mahle International Gmbh | Method for producing a camshaft |
US20190154129A1 (en) * | 2017-11-21 | 2019-05-23 | Medela Holding Ag | Integrated cam shaft assembly |
US11732620B2 (en) | 2021-07-30 | 2023-08-22 | MAHLE International | Combined plug-sensor wheel for a camshaft |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012223811A1 (de) | 2012-12-19 | 2014-06-26 | Mahle International Gmbh | Nockenwelle |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5419217A (en) * | 1990-11-19 | 1995-05-30 | Nippon Piston Ring Co., Ltd. | Machine element with at least a fitting member pressure-fitted on a shaft and method of making the same |
US20070062475A1 (en) * | 2004-10-08 | 2007-03-22 | Marco Schmitt | Ina-schaeffler kg, industriestrasse 1 - 3, 91074 herzogenaurach anr 12 88 48 20 |
US20090038568A1 (en) * | 2005-03-11 | 2009-02-12 | Aisin Seiki Kabushiki Kaisha | Valve timing control apparatus |
US20090250026A1 (en) * | 2008-04-08 | 2009-10-08 | Schaeffler Kg | Apparatus for the variable setting of the control times of gas exchange valves of an internal combustion engine |
US20110067656A1 (en) * | 2009-09-18 | 2011-03-24 | Schaeffler Technologies Gmbh & Co. Kg | Device for varying the angular position of a camshaft with respect to a crankshaft of an internal combustion engine |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3301749A1 (de) | 1983-01-20 | 1984-08-09 | Mahle Gmbh, 7000 Stuttgart | Nockenwelle fuer verbrennungsmotoren |
JPS612970A (ja) * | 1984-06-18 | 1986-01-08 | Ngk Insulators Ltd | エンジン用カムシヤフト |
DE3641129C1 (de) | 1986-12-02 | 1987-07-30 | Daimler Benz Ag | Vorrichtung zur Lagerung von zwei Nockenwellen im Zylinderkopf einer mehrzylindrigen Reihenbrennkraftmaschine |
US5293847A (en) * | 1993-02-16 | 1994-03-15 | Hoffman Ronald J | Powdered metal camshaft assembly |
DE10292295D2 (de) | 2001-05-29 | 2004-05-06 | Reiner Dorner | Verfahren zur drehfesten Befestigung von Triebteilen auf Wellen |
DE20221858U1 (de) * | 2002-12-21 | 2008-09-04 | Schaeffler Kg | Brennkraftmaschine mit einer Vorrichtung zur hydraulischen Drehwinkelverstellung ihrer Nockenwelle gegenüber ihrer Kurbelwelle sowie mit einer Vakuumpumpe für einen Servoverbraucher, insbesondere für einen Bremskraftverstärker |
DE10331089A1 (de) | 2003-07-09 | 2005-02-24 | Volkswagen Ag | Zylinderkopfhaube und Verfahren zur Herstellung |
DE102004049272A1 (de) | 2004-10-09 | 2006-04-13 | Daimlerchrysler Ag | Verfahren zur Herstellung einer gebauten Nockenwelle |
DE202005005585U1 (de) * | 2005-04-07 | 2005-06-16 | Thyssenkrupp Automotive Ag | Mehrteiliger Multifunktionsnocken |
US7234428B2 (en) * | 2005-07-28 | 2007-06-26 | Briggs And Stratton Corporation | Cam shaft assembly for an engine |
DE102007018920B3 (de) * | 2007-04-19 | 2008-08-28 | Thyssenkrupp Presta Ag | Antriebswelle |
CN201050589Y (zh) * | 2007-06-22 | 2008-04-23 | 中国第一汽车集团公司无锡柴油机厂 | 一种带信号盘的凸轮轴驱动齿轮 |
DE102007049072B4 (de) | 2007-10-12 | 2020-06-18 | Schaeffler Technologies AG & Co. KG | Phasenversteller für eine Brennkraftmaschine mit einer Oldham-Kupplung |
DE102007056638B4 (de) | 2007-11-24 | 2018-02-22 | Usk Karl Utz Sondermaschinen Gmbh | Verfahren und Vorrichtung zur Montage von einem Verbund, insbesondere aus einer Nockenwelle und einem Gehäuse |
DE102007063254A1 (de) | 2007-12-31 | 2009-07-02 | Mahle International Gmbh | Zylinderkopfhaube |
EP2194240A1 (en) * | 2008-12-05 | 2010-06-09 | Perkins Engines Company Limited | Camshaft speed sensor target |
CN201444043U (zh) * | 2009-05-15 | 2010-04-28 | 东风朝阳柴油机有限责任公司 | 凸轮轴相位信号的测量装置 |
CN201568090U (zh) * | 2009-10-21 | 2010-09-01 | 浙江吉利汽车有限公司 | 驱动齿轮后置的发动机凸轮轴 |
DE102009059712A1 (de) * | 2009-12-18 | 2011-09-22 | Thyssenkrupp Presta Teccenter Ag | Nockeneinheit für eine gebaute Nockenwelle |
DE102010008003A1 (de) | 2010-02-15 | 2011-08-18 | Schaeffler Technologies GmbH & Co. KG, 91074 | Zellenrad |
US8272359B2 (en) * | 2010-03-10 | 2012-09-25 | GM Global Technology Operations LLC | Camshaft including weight reducing features and method of forming |
DE102010003546B4 (de) | 2010-03-31 | 2016-02-04 | Schwäbische Hüttenwerke Automotive GmbH | Kombinierte Kettenrad-Stator-Einheit |
DE102010024721A1 (de) | 2010-06-23 | 2012-03-29 | Mahle International Gmbh | Nocken und zugehörige Nockenwelle |
DE102011001499B3 (de) | 2011-03-23 | 2012-08-30 | Usk Karl Utz Sondermaschinen Gmbh | Verfahren und Vorrichtung zur Herstellung einer Schrumpfverbindung zwischen wenigstens zwei Bauteilen |
DE102012223811A1 (de) | 2012-12-19 | 2014-06-26 | Mahle International Gmbh | Nockenwelle |
-
2012
- 2012-12-19 DE DE102012223811.5A patent/DE102012223811A1/de not_active Withdrawn
-
2013
- 2013-11-19 EP EP13193546.2A patent/EP2746545B1/de not_active Not-in-force
- 2013-12-09 CN CN201310662881.9A patent/CN103967548A/zh active Pending
- 2013-12-18 JP JP2013260869A patent/JP2014122627A/ja active Pending
- 2013-12-18 US US14/133,124 patent/US20140165935A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5419217A (en) * | 1990-11-19 | 1995-05-30 | Nippon Piston Ring Co., Ltd. | Machine element with at least a fitting member pressure-fitted on a shaft and method of making the same |
US20070062475A1 (en) * | 2004-10-08 | 2007-03-22 | Marco Schmitt | Ina-schaeffler kg, industriestrasse 1 - 3, 91074 herzogenaurach anr 12 88 48 20 |
US20090038568A1 (en) * | 2005-03-11 | 2009-02-12 | Aisin Seiki Kabushiki Kaisha | Valve timing control apparatus |
US20090250026A1 (en) * | 2008-04-08 | 2009-10-08 | Schaeffler Kg | Apparatus for the variable setting of the control times of gas exchange valves of an internal combustion engine |
US20110067656A1 (en) * | 2009-09-18 | 2011-03-24 | Schaeffler Technologies Gmbh & Co. Kg | Device for varying the angular position of a camshaft with respect to a crankshaft of an internal combustion engine |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140283773A1 (en) * | 2011-12-10 | 2014-09-25 | Volkswagen Aktiengesellschaft | Adjustable camshaft drive |
US9316127B2 (en) * | 2011-12-10 | 2016-04-19 | Volkswagen Aktiengesellschaft | Adjustable camshaft drive |
WO2017029095A1 (de) * | 2015-08-17 | 2017-02-23 | Thyssenkrupp Presta Teccenter Ag | Modulbaugruppe |
US20180065205A1 (en) * | 2016-09-07 | 2018-03-08 | Mahle International Gmbh | Method for producing a camshaft |
US20190154129A1 (en) * | 2017-11-21 | 2019-05-23 | Medela Holding Ag | Integrated cam shaft assembly |
US11732620B2 (en) | 2021-07-30 | 2023-08-22 | MAHLE International | Combined plug-sensor wheel for a camshaft |
Also Published As
Publication number | Publication date |
---|---|
EP2746545B1 (de) | 2019-08-14 |
CN103967548A (zh) | 2014-08-06 |
DE102012223811A1 (de) | 2014-06-26 |
EP2746545A1 (de) | 2014-06-25 |
JP2014122627A (ja) | 2014-07-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MAHLE INTERNATIONAL GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAUTEL, FRANK;FLENDER, THOMAS;MENONNA, ANTONIO;AND OTHERS;SIGNING DATES FROM 20131209 TO 20131210;REEL/FRAME:032830/0384 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |