EP3068983A1 - Adjustable camshaft - Google Patents
Adjustable camshaftInfo
- Publication number
- EP3068983A1 EP3068983A1 EP14799104.6A EP14799104A EP3068983A1 EP 3068983 A1 EP3068983 A1 EP 3068983A1 EP 14799104 A EP14799104 A EP 14799104A EP 3068983 A1 EP3068983 A1 EP 3068983A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- carrier shaft
- latching
- package
- spring
- 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 12
- 238000000034 method Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004804 winding 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
- F01L13/0036—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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/34413—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
-
- 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
- F01L13/0042—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 being 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
- F01L1/02—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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/02—Initial camshaft settings
Definitions
- the present invention relates to an adjustable camshaft for an internal combustion engine with a extending in the direction of a rotation axis carrier shaft, wherein on the carrier shaft at least one cam package having at least one cam member is slidably received in the direction of the axis of rotation, wherein the cam package on the carrier shaft in at least two axial locking positions can be latched, and wherein for forming the detent positions at least one biased with a spring element locking element and at least one locking element receiving are provided so that the locking element can engage in the locking positions in the locking element recording.
- Adjustable camshafts for internal combustion engines having a support shaft extending in a rotation axis, and at least one cam package is movably received on the support shaft in the direction of the rotation axis.
- the cam package rotates with rotation of the carrier shaft, for which a wedge structure can serve between the carrier shaft and the cam package, and the wedge structure prevents the cam assembly from rotating on the carrier shaft.
- locking elements are known which can be biased by spring elements, and the locking elements can engage in locking element receptacles, whereby the axial position of the cam stack is defined on the carrier shaft.
- the different axial positions of the cam pack on the carrier shaft serve to connect various cam elements, which may comprise the cam pack, with valves or tap elements for driving valves.
- the different cam elements may determine different timing for opening and closing the valves of the internal combustion engine or the valve lift may be changed by various cam elements operatively connected to a tapping element or directly with a valve.
- the change takes place by taking various, discrete axial positions of the cam pack on the Carrier shaft, and the displacement of the cam package is effected for example by a resting in the cylinder head received manipulation means which can cooperate with an adjusting element, which may also be covered by the cam package.
- DE 10 2010 011 897 A1 shows an adjustable camshaft for an internal combustion engine having a carrier shaft extending in a rotational axis, and a cam packet is received axially movably on the carrier shaft.
- a locking element in the form of a ball which is acted upon by a spring force of a spring element.
- the ball can engage in various profile grooves by the spring force, and the profile grooves are arranged with respect to their axial position so that each profile groove corresponds to the contact of an associated cam track of a cam member against a tap member.
- the latching element and the spring element for applying force to the latching element are arranged in a receiving bore of the camshaft, wherein the latching element receptacles are introduced in the form of the profile grooves on the inside in the cam package. If the camshaft must be mounted, first the spring element must be inserted in the receiving bore in the camshaft, then the locking element must be inserted against the spring force even before the arrangement of the cam package on the support shaft in the receiving bore. The subsequent postponement of the cam package thereby creates the difficulty that the locking element must be pressed into the receiving bore against the spring force of the spring element to prevent blocking of the cam pack when pushed onto the support shaft by the spherical locking element.
- the object of the invention is the development of an adjustable camshaft for an internal combustion engine with a carrier shaft and an axially slidably received on the carrier shaft cam package, means for locking the cam package to be formed in discrete axial positions on the carrier shaft, which are simple, the light Allow mounting of the cam package on the carrier shaft and in particular are readjustable.
- the invention includes the technical teaching that the spring element and the biased with this locking element are accommodated in the cam package and that the at least one locking element receptacle is arranged on the carrier shaft.
- the locking means comprising at least one locking element and at least one spring element for biasing the locking element in the cam package
- the above-described disadvantages are overcome in an advantageous manner.
- the cam package can be pushed onto the carrier shaft without the prior arrangement of the latching element and the spring element, and there is no blocking of the cam packet by the particular spherical latching element.
- the latching element and the spring element can be arranged on the cam shaft after the arrangement of the cam package on the cam and that the bias of the locking element by the spring element can be applied only subsequently.
- a positive locking geometry can be provided between the carrier shaft and the cam packet, which comprises, for example, a groove structure or a wedge structure on the inside of the cam pack and on the outside of the carrier shaft and wherein the structures engage in such a way that the cam pack can slide on the carrier shaft in a rotationally and axially movable manner ,
- the form fit geometry can preferably be formed as a wedge structure and fed to a subsequent hardening process. This does not create the disadvantage that the receiving bore for receiving the spring element and the locking element by, for example, a heat input experiences a delay. Furthermore, it is not necessary to ensure that the adjacent wedge structure is sufficiently free from the receiving bore.
- the locking element receiving a circumferential groove can be introduced in the carrier shaft for each of the locking element receptacles, can engage in the arranged on the cam package locking elements by the spring force of the spring element. If, for example, two latching positions for the cam pack have to be provided, then two adjacent circumferential grooves can be introduced in the carrier shaft. In the case of three axial latching positions of the cam pack on the carrier shaft, for example if three cam elements with different contours or winding position are arranged on the cam pack, can be correspondingly introduced three circumferential grooves in the carrier shaft, etc ..
- the latching element receptacle can be designed as a groove bounded on a circumferential region or as a depression in the outer circumference of the carrier shaft.
- the recess can be designed, for example, funnel-shaped, in particular in the form of a counterbore.
- the limited to a peripheral region groove for example, have a tangential course and are produced by a milling operation.
- the circumferential groove can be introduced by a rotation operation in the carrier shaft.
- the locking element receptacle can be formed by an insert element, wherein a receiving groove can be introduced in the outer circumference of the carrier shaft for receiving the insert element.
- the insert element can be inserted into the receiving groove.
- Receptacles for receiving insert elements are particularly suitable for hollow support shafts having a smaller wall thickness if the introduction of a peripheral groove or a groove bounded on a peripheral region is technically impossible or not meaningfully possible due to the small wall thickness.
- the latching element receptacle can have a waveform pointing in the direction of the latching element, and the latching element can travel along the axis of rotation in the case of a movement of the cam stack via the waveform.
- the wave troughs correspond to the waveform of the number of locking element receptacles and thus the number of grooves.
- this has at least one receiving bore in which the spring element and the biased with this locking element are received.
- the receiving bore may for example be designed as a threaded bore, and wherein a screw may be provided which is screwed into the threaded bore.
- the receiving bore extends in a bore axis which is perpendicular to the axis of rotation of the carrier shaft, the latter forming the axial displacement direction of the cam stack.
- the receiving bore also extends perpendicular to the direction of displacement of the cam package.
- the cam packet may comprise an adjusting element, wherein the receiving bore for receiving the locking element and the spring element may be at least partially incorporated in the adjusting element.
- the receiving bore for receiving the locking element and the spring element may be at least partially incorporated in the adjusting element.
- spaced detent element receptacles can be provided in the support shaft, which thus need not be adjacent to each other.
- the object of the present invention is further achieved by a method for assembling a camshaft for an internal combustion engine having a support shaft extending in a rotation axis, wherein on the carrier shaft at least one cam package having at least one cam member is slidably disposed in the direction of the axis of rotation, wherein the formation of At least two locking positions of the cam stack in the direction of the axis of rotation on the carrier shaft at least one biased with a spring element locking element is provided, and the method provides first providing a support shaft with at least one arranged on this locking element receptacle, then the step of pushing the cam stack on the Carrier shaft provided and then the locking element and the spring element are arranged on the cam package.
- the latching element and the spring element can be introduced into a receiving bore introduced into the cam pack, wherein a screw element is furthermore provided, which is screwed into the receiving bore according to a further step of the method. Subsequently, the step of setting the Spring preload of the spring element against the locking element by changing the screwing of the screw in the receiving bore follow.
- Figure 1 is a view of a first embodiment of a
- Camshaft in a cross section and the camshaft has a carrier shaft which is made solid, and on the carrier shaft is axially movably arranged a cam packet,
- FIG. 2 shows the enlarged view of a detail X according to FIG. 1,
- Figure 3 is a view of a carrier shaft with introduced in this
- Figure 4a shows another embodiment of a carrier shaft with a
- Locking element receptacle in the form of a locally limited groove, wherein the groove is shown laterally,
- Figure 5 is a cross-sectional view of an embodiment of the
- Camshaft with a carrier shaft which is hollow and on which an axially displaceable cam assembly is arranged
- FIG. 6 shows the enlarged view of a detail Y according to FIG. 5,
- Figure 7a another embodiment of a carrier shaft with a
- FIG. 1 an embodiment of a camshaft 1 with the features of the present invention is shown in a cross-sectional view.
- the camshaft 1 is intended for an internal combustion engine and may, for example, be rotatably received about an axis of rotation 10 in the cylinder head of the internal combustion engine.
- the camshaft 1 has a carrier shaft 1 1, which is designed as a solid rod.
- the cam package 12 is longitudinally movable in the direction of the axis of rotation 10 and can be reciprocated in both directions of the axis of rotation 10 according to the double arrow shown.
- the cam package 12 has an adjusting element 23 into which an external manipulation means, not shown, can engage, and which axially displaces the cam assembly 12.
- the cam package 12 has, for example, two cam elements 13 with mutually different different cam contours, and depending on the axial position of the cam package 12 on the support shaft 11, the various cam elements 13 can be associated with a tap element for valve actuation.
- locking means are provided, which are described in more detail below.
- a detent element 15 in the form of a ball is shown by way of example, and the detent element 15 can engage in a detent element receptacle 16.
- a spring element 14 is provided, which biases the locking element 15 into the locking element receptacle 16.
- the latching element receptacle 16 comprises, corresponding to the number of the cam elements 13, two axially spaced circumferential grooves 17, which in the Carrier shaft 11 are introduced.
- the locking element 15 and the spring element 14 are arranged in the cam package 12th
- the illustration shows the cam package 12 in a latching position, which is determined by the right circumferential groove 17, see FIG. 2. If the cam package 12 is displaced to the left by the external manipulation means in engagement with an adjusting element 23, then the latching element 15 can move against the Force of the spring element 14 are led out of the right circumferential groove 17 until the locking element 15 snaps into the left circumferential groove 17. Consequently, with the illustrated cam package 12, two axial positions can be taken.
- a screw element 22 is shown, and the screw element 22 serves to adjust the spring bias of the spring element 14 against the latching element 15, as in connection with FIG described in more detail.
- FIG. 2 shows in an enlarged view the detail X according to FIG. 1.
- the detail shows a part of the solidly executed carrier shaft 1 1 which extends along the axis of rotation 10.
- the two circumferential grooves 17 are shown in more detail for forming the locking element receptacles 16, and the illustration shows the locking of the locking element 15 in one of the locking element receptacles 16, formed by the right side circumferential groove 17 formed in the support shaft eleventh
- a receiving bore 21 is introduced into the cam package 12.
- the receiving bore 21 extends perpendicular to the axis of rotation 10 of the support shaft 11 and guides the spherical detent element 15 so that the detent element 15 in the receiving bore 21 against the spring force of the spring element 14 can perform a lifting movement.
- the receiving bore 21 is designed at least in sections as a threaded bore, so that the screw 22 can be screwed into the receiving bore 21 finally.
- the receiving bore 21 is introduced in sections in the adjusting element 23, wherein the cam pack 12 comprises a base body 25, through which the receiving bore 21 extends further.
- FIG. 3 shows, in a side view, the carrier shaft 11 extending along the axis of rotation 10, and a wedge structure 24 is shown on the outer circumference of the carrier shaft 11 in order to prevent the cam lobe 12 from rotating on the carrier shaft 11.
- a corresponding inside wedge structure is located in the passage of the cam package 12, so that the wedge structure 24 can engage positively in the wedge structure in the cam package 12.
- the locking element receptacles 16 are shown in the form of two circumferential grooves 17 which are arranged adjacent to each other. This creates a wave contour through the locking element receptacle 16, along which the latching element 15 can run along in the receiving bore 21 by performing a lifting movement.
- FIG. 4a shows the carrier shaft 11 in a rotational position which laterally shows the grooves 18, so that the shaft structure can be recognized by the grooves 18, and
- FIG. 4b shows the carrier shaft 11 in a rotational position which shows the grooves 18 in a plan view represents.
- FIG. 5 shows a further exemplary embodiment of a camshaft 1 with a carrier shaft 1 1 extending along an axis of rotation 10, the carrier shaft 11 being hollow and thus formed by a tube.
- a wedge structure 24 for engagement in a wedge structure, which is introduced on the inside in the cam package 12.
- the cam package 12 has cam elements 13 and an adjusting element 23, wherein the embodiment of the cam package 12 has three axially juxtaposed cam elements 13.
- the locking element receptacle 16 on the support shaft 1 1 three notches 26, as described in more detail in connection with Figure 6 below.
- the locking means according to this embodiment of the camshaft 1 comprise an insert element 19, in which the locking element receptacle 16 is introduced with three recesses.
- the insert element 19 is located in a receiving groove 20 which is introduced on the outer circumference of the tubular carrier shaft 1 1. This results in the advantage that in the carrier shaft 1 1 with a small wall thickness no deeper grooves must be introduced, as described in connection with Figure 1.
- the receiving bore 21 for receiving the spherical locking element 15, the spring element 14 and the screw 22 is formed, and via the screw 22, as already described in connection with Figure 1, the biasing force of the spring element 14 against the locking element 15 are changed.
- Figures 7a and 7b show the carrier shaft 11 according to the embodiment in Figures 5 and 6, and Figure 7a shows the carrier shaft 1.1 in a rotational position about the axis of rotation 10, in which the receiving groove 20 is shown from the side, and Figure 7b shows the carrier shaft 1 1 in a rotational position about the axis of rotation 10, in which the receiving groove 20 in a plan view.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013112539.5A DE102013112539A1 (en) | 2013-11-14 | 2013-11-14 | Adjustable camshaft |
PCT/EP2014/003008 WO2015070971A1 (en) | 2013-11-14 | 2014-11-11 | Adjustable camshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3068983A1 true EP3068983A1 (en) | 2016-09-21 |
EP3068983B1 EP3068983B1 (en) | 2018-12-19 |
Family
ID=51900840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14799104.6A Active EP3068983B1 (en) | 2013-11-14 | 2014-11-11 | Adjustable camshaft |
Country Status (5)
Country | Link |
---|---|
US (1) | US9879576B2 (en) |
EP (1) | EP3068983B1 (en) |
CN (1) | CN105723058A (en) |
DE (1) | DE102013112539A1 (en) |
WO (1) | WO2015070971A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015212691B4 (en) | 2015-07-07 | 2022-06-23 | Thyssenkrupp Ag | Camshaft with locking element and method for assembling a camshaft |
CN106593569B (en) * | 2016-12-12 | 2019-02-15 | 孙德军 | A kind of Mechanical course valve actuating gear and control method |
KR102439627B1 (en) * | 2017-12-12 | 2022-09-05 | 현대자동차주식회사 | Variable valve device for engine |
CN112081638A (en) * | 2020-07-24 | 2020-12-15 | 东风汽车零部件(集团)有限公司襄阳粉末冶金分公司 | Variable cam shaft for engine braking and other functions |
DE102021204314A1 (en) * | 2021-04-29 | 2022-11-03 | Mahle International Gmbh | Sliding cam system for an internal combustion engine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB112583A (en) * | 1917-06-26 | 1918-01-17 | Herman Phillip Eriksen Miller | Improvements in Valve Operating Mechanism for Internal Combustion Engines. |
JPH07332049A (en) * | 1994-06-06 | 1995-12-19 | Honda Motor Co Ltd | Valve drive controller for engine |
DE102007010149A1 (en) * | 2007-03-02 | 2008-09-04 | Audi Ag | Automotive piston engine gas valve timer has right- and left-handed grooves are located immediately alongside and translating into each other |
DE102007027979B4 (en) * | 2007-06-19 | 2015-07-23 | Audi Ag | Valve train for gas exchange valves of an internal combustion engine with camshaft tunnel bearings |
DE102008005639B4 (en) * | 2008-01-23 | 2021-10-21 | Daimler Ag | Valvetrain device |
DE102009039733A1 (en) | 2009-09-02 | 2011-03-10 | Thyssenkrupp Presta Teccenter Ag | Valve drive for gas exchange valves of an internal combustion engine with axially displaceable cam units |
US8714125B2 (en) * | 2009-10-06 | 2014-05-06 | Yamaha Hatsudoki Kabushiki Kaisha | Valve gear of engine |
DE102010011897B4 (en) | 2010-03-18 | 2016-08-25 | Thyssenkrupp Presta Teccenter Ag | Valve gear with camshaft with axially displaceable cam unit |
DE102011003024A1 (en) * | 2011-01-24 | 2012-07-26 | Schaeffler Technologies Gmbh & Co. Kg | Slide cam system with friction lock |
DE102011052912B4 (en) * | 2011-08-23 | 2023-09-21 | Dr.Ing.H.C.F.Porsche Aktiengesellschaft | Internal combustion engine and valve train with sliding cams for an internal combustion engine |
JP2013060858A (en) * | 2011-09-13 | 2013-04-04 | Suzuki Motor Corp | Variable valve gear for internal combustion engine |
DE102011117244B4 (en) | 2011-10-27 | 2023-08-10 | Mercedes-Benz Group AG | Valve train for an internal combustion engine |
DE102011085706A1 (en) * | 2011-11-03 | 2013-05-08 | Schaeffler Technologies AG & Co. KG | Valve train for multi-cylinder combustion engine of motorcycle, has position unit whose actuator pins radially extend to cam shaft, where outer jacket surface of portion of actuator pins engage at guide surfaces |
-
2013
- 2013-11-14 DE DE102013112539.5A patent/DE102013112539A1/en not_active Ceased
-
2014
- 2014-11-11 WO PCT/EP2014/003008 patent/WO2015070971A1/en active Application Filing
- 2014-11-11 CN CN201480062217.3A patent/CN105723058A/en active Pending
- 2014-11-11 EP EP14799104.6A patent/EP3068983B1/en active Active
- 2014-11-11 US US15/035,566 patent/US9879576B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US9879576B2 (en) | 2018-01-30 |
EP3068983B1 (en) | 2018-12-19 |
US20160290185A1 (en) | 2016-10-06 |
CN105723058A (en) | 2016-06-29 |
WO2015070971A1 (en) | 2015-05-21 |
DE102013112539A1 (en) | 2015-05-21 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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