EP3149290A2 - Verstellbare nockenwelle mit verbesserter ölübergabe zwischen innenwelle und aussenwelle - Google Patents
Verstellbare nockenwelle mit verbesserter ölübergabe zwischen innenwelle und aussenwelleInfo
- Publication number
- EP3149290A2 EP3149290A2 EP15722683.8A EP15722683A EP3149290A2 EP 3149290 A2 EP3149290 A2 EP 3149290A2 EP 15722683 A EP15722683 A EP 15722683A EP 3149290 A2 EP3149290 A2 EP 3149290A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial
- outer shaft
- shaft
- inner shaft
- opening
- 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
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 claims description 6
- 230000003313 weakening effect Effects 0.000 description 7
- 238000003801 milling Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 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
- F01L1/02—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
- F01L1/34—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
- F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
-
- 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
- F01L2001/0471—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
- 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 an adjustable camshaft with a running outer shaft and with a rotatably received in the outer shaft inner shaft, wherein the inner shaft has a cavity which is acted upon by oil, and wherein in the outer shaft at least a first radial aperture and in the inner shaft at least one second radial aperture is formed so that oil can flow at a coverage of the first radial aperture with the second radial aperture between the cavity and the outside of the outer shaft.
- DE 36 02 477 A1 shows by way of example a camshaft having a centrally extending through the camshaft cavity, and the camshaft has a radial bore, so that oil between the cavity and the outside of the camshaft can be transported.
- an adjustable camshaft with a phase divider is known, and for activating the phaser at least two oil connections are known, via which the phase divider can be acted upon with pressure oil for actuation.
- a pressure connection In order to pressurize the phase divider with oil, a pressure connection must be transmitted from a stationary component to the rotating camshaft, since the phase divider rotates with the camshaft.
- first main bearing of the adjustable camshaft is used and an inner bearing shell, which rotates with the outer shaft of the camshaft, is rotated by the stationary bearing shell over Pass grooves pressure oil to the rotating camshaft.
- radial bores are provided between circumferential grooves in the bearing shell, open into the radial bores, which extend through the bearing shell, the outer shaft and the inner shaft and the radial bore in the inner shaft opens into the cavity in the inner shaft.
- a further example of an adjustable camshaft with an oil transfer from a stationary bearing shell to a phase splitter rotating with the camshaft is known from EP 2 527 607 A2.
- the inner shaft and the outer shaft have radial openings, wherein the openings in the outer shaft must have a circumferentially facing elongate extent to allow over a displacement angle of the inner shaft in the outer shaft, an overlap of the radial opening in the inner shaft with the opening in the outer shaft , Disadvantageously, however, the outer shaft is considerably weakened as a result.
- the inner shaft and / or the outer shaft has a circumferential groove, so that the fluid connection between the radial opening in the inner shaft and the radial opening in the outer shaft via the circumferential groove, although an overlap of the radial openings is not required, but is characterized by the circumferential groove weakened the mechanical load capacity of the outer shaft and / or the inner shaft.
- the weakening added by provided grooves to the circumferentially extending elongated apertures, so that the strength of the camshaft can reach critical lower limits.
- the object of the invention is the development of an adjustable camshaft without substantial mechanical weakening by oil transfer points, with an oil transfer between a cavity in the inner shaft and the outer shaft should be ensured even in large rotational ranges of the inner shaft in the outer shaft.
- the invention includes the technical teaching that the first radial aperture on the inside of the outer shaft has a larger cross-section than on the outside of the outer shaft and / or that the second radial aperture on the outside of the inner shaft has a larger cross-section than on the inside of the inner shaft.
- the inventive design of the first radial opening in the outer shaft or the second radial opening in the inner shaft is made possible that even in the angular end positions of a rotation of the inner shaft in the outer shaft full coverage of the first and second radial openings is possible without the first radial aperture in the outer shaft extends over a peripheral region corresponding to the full angular range of the adjustment of the inner shaft in the outer shaft.
- the camshaft is only minimally weakened in its load capacity.
- the first radial aperture may be an opening in the inside, by chamfered portion bounded and opening into the outside cylindrical section.
- the first radial opening in its cross-section can be trapezoidal in shape, and in particular a smaller opening width to the outside of the opening allows preserving the load capacity of the outer shaft, since the area moment of inertia is less reduced by the lower material removal radially on the outside.
- the second radial opening in the inner shaft can have, for example, a conical enlargement in a section in the direction of the outer side of the inner shaft.
- the first radial opening may have a cross-section opening into the inside, which is determined so that over the range of rotation of the inner shaft in the outer shaft substantially complete coverage of the cross section with the second radial opening in the inner shaft is possible.
- the bevels which border the section of the opening in the direction of the inside in the outer shaft, be defined so that even in the angular end position of the twisted inner shaft in the outer shaft, a full overlap of the second radial opening in the inner shaft with the inside opening area the first radial breakthrough is covered.
- the first radial aperture may have a circumferentially elongate extent, wherein the diagonals may be provided in the end portions of the elongated radial aperture.
- the bevels may additionally be provided in the side areas, so that the trapezoidal shape results over the entire edge of the first radial opening.
- the design of the second radial opening in the inner shaft can be formed in addition to the inventive design of the first radial opening in the outer shaft, so that it is also provided that the second radial opening on the outside of the inner shaft has a larger cross-section than on the inside of the inner shaft , As a result, the angle range for complete coverage of the openings is further increased.
- an oil feed point for controlling a phaser can be formed, wherein two and preferably three circumferentially equally distributed radial openings in the outer shaft and in the inner shaft can be provided.
- the breakthroughs in the outer shaft can also be present quadruple according to a further embodiment and be unevenly distributed over the circumference, wherein at the same time four openings can be provided in the inner shaft, distributed over the circumference have an equal angular pitch.
- the inside of the outer shaft and / or the outer side of the inner shaft may be formed without grooves at least in the region of the radial openings.
- the ratio of the opening width in the mouth to the outer opening to the opening in the mouth to the inside of the first radial breakthrough for example, 0.6 and 0.9 and preferably 0.7 to 0.8, this value also for the inventive design of the inner shaft can be provided.
- the inventive geometric configuration of the at least one first radial opening in the outer shaft can be produced for example with an end mill by the end mill is made in breakthrough at an angle. Likewise, the use of a contour milling tool is possible.
- the inner shaft has radial openings, which are evenly distributed over the circumference and each include an equal angle and that the outer shaft has radial openings which are formed unevenly and in particular distributed in pairs over the circumference.
- the outer shaft has radial openings, which are evenly distributed over the circumference and each include a respective same angle and that the inner shaft has radial openings which are formed unevenly and in particular distributed in pairs over the circumference.
- the division of the radial openings on the outer shaft or on the inner shaft is formed so that an overlap of all openings of the inner shaft and the outer shaft only in a Versteil Schlmitte the rotation of the inner shaft is given in the outer shaft.
- the overlap can be given by the larger opening cross-section of the radial openings and the selection of the angle between the radial openings so that over the rotation range of the inner shaft in the outer shaft of the flow cross section of all openings remains substantially unchanged and the influence of the angular position on the adjustment and to the control behavior of a phaser, which is fed by the radial bore with pressure medium, is minimized.
- Figure 1 is a cross-sectional view of an adjustable camshaft according to
- Figure 2 is a cross-sectional view of an adjustable camshaft with the
- Figure 2a is a fragmentary enlarged view of a first radial
- Figure 3 is a cross-sectional view of an adjustable camshaft
- Oil channels which are coupled to a schematically shown phase divider
- FIG. 4 shows a cross-sectional view through the adjustable camshaft according to the section line A-A, as shown in FIG. 3,
- Figure 5a is a cross-sectional view of an adjustable camshaft with the
- Figure 5b is a cross-sectional view of the adjustable camshaft according to the embodiment in Figure 5a, wherein the inner shaft is shown in a rotational position in which the first radial aperture has a full coverage with the second radial aperture and
- Figure 5c is a cross-sectional view of the adjustable camshaft according to the embodiment in Figure 5a or 5b, wherein the inner shaft is shown in a rotational position in which two first radial openings full coverage with two of the first radial breakthrough has no overlap with the second radial breakthrough.
- camshaft 1 shows a cross section through an adjustable camshaft 1 according to the prior art, and the camshaft 1 has an outer shaft 10 and a Inner shaft 1 1, and the inner shaft 1 1 extends through the hollow running outer shaft 10 therethrough. Both shafts 10 and 1 1 can rotate together about a rotation axis 20.
- the inner shaft 1 1 has a partially extending therethrough cavity 12, which can be acted upon, for example, with pressure oil.
- a bearing ring 21 extends, and the bearing ring 21 has openings 24. If the bearing ring 21 is pressurized externally with oil via a further bearing ring, not shown, then this passes into the openings 24, which coincide in their position with the first radial openings 13 in the outer shaft 10.
- FIG. 2 shows the further developed according to the invention, adjustable camshaft with introduced in the outer shaft 10 first radial openings 13 which have on the inside 15 of the outer shaft 10 has a larger cross-section than on the outer side 16 of the outer shaft 10.
- the twisted inner shaft 1 1 has shown second radial Breakthroughs 14, which despite the rotation has a full overlap with the opening into the inner side 15 first radial openings 13.
- the first radial openings 13 on the outer side 16 of the outer shaft 10 on a smaller cross-sectional dimension, whereby a mechanical weakening of the outer shaft 10 is minimized.
- FIG. 1 shows the further developed according to the invention, adjustable camshaft with introduced in the outer shaft 10 first radial openings 13 which have on the inside 15 of the outer shaft 10 has a larger cross-section than on the outer side 16 of the outer shaft 10.
- the twisted inner shaft 1 1 has shown second radial Breakthroughs 14, which despite the rotation has a full overlap with the opening into the inner side 15 first radial openings
- FIG. 2 a shows the geometric configuration of a first radial opening 13 in a trapezoidal shape, and a section 18 has bevels 17 which open into a cylindrical section 19. This results in a trapezoidal cross-sectional shape of the first radial openings 13th
- the enlarged view also shows a circumferential annular gap 22 in the bearing ring 21, via which an oil supply of the opening 24 for transferring the oil in the first radial opening 13 in the outer shaft 10 is ensured even with a rotation of the bearing ring 21 in a further bearing ring.
- FIG. 3 shows, to further explain the embodiment of the adjustable camshaft 1 with the openings 13 according to the invention, a cross-sectional view through the camshaft 1, and at the end on the camshaft 1, a phase splitter 23 is shown adjacent to a drive wheel 27 which is coupled to the outer shaft 10.
- the drive wheel may also be a part of the housing of the phase adjuster 23.
- the phase divider 23 In order to rotate the inner shaft 1 1 in the outer shaft 10 back and forth, the phase divider 23 must be alternately supplied with oil via two oil channels and a first oil passage 25 comprises the cavity 12, the second radial opening 14, the first radial opening 13 and the Breakthrough 24 in the bearing ring 21.
- the first oil passage 25 is fed, for example by pressurization via a stationary, outer-side bearing ring (not shown), in which the bearing ring 21 is received and forms a plain bearing with this.
- a second oil channel 26 is formed via further openings in the bearing ring 21 and in the outer shaft, wherein, however, the second oil passage 26, the inner shaft 1 1 does not undergo.
- first radial aperture 13 which opens in the direction of the second radial opening 14 on the inside.
- the first radial opening 13 in this case has a larger cross-section in the mouth on the inner side 15 than in the mouth to the outer side 16 of the outer shaft 10.
- FIG. 4 shows a view along the section line A - A according to FIG. 3.
- the bearing ring 21 as well as the outer shaft 10 and the inner shaft 11 are shown cut, the section extending through the openings 13 and 14.
- the sectional view shows on the circumference evenly distributed three first radial openings 13 in the outer shaft 10 and three second radial openings 14 in the inner shaft 1 1.
- the geometric configuration of the first radial openings 13 is shown with the features of the invention, and the The first radial openings 13 have on the inside of the outer shaft 10 has a larger cross section than on the outside of the outer shaft 10.
- the side portions of the first radial openings 13 are bounded by a cylindrical portion 19 toward the outside and through a portion 18 to the inside, the side is limited by slopes 17.
- Figures 5a, 5b and 5c show in different rotational positions of the inner shaft 1 1 in the outer shaft 10 is a cross section through another embodiment of an adjustable camshaft 1.
- the inner shaft 1 1 has four radial through-bridge 14, for example, and the radial openings 14 are on the Scope equally distributed and enclose an angle of 90 ° to each other.
- the outer shaft 10 also has four openings 13, of which two at 180 ° diametrically opposite pairs of bridges 13 to each other an angle ⁇ of less than 90 °.
- the inner shaft 1 1 can be rotated so that, for example, only two of the four openings 14 of the inner shaft 1 1 with openings 13 of the outer shaft 10 are in coverage.
- FIG 5a a rotational position of the inner shaft 1 1 is shown in the outer shaft 10, in which all four openings 14 of the inner shaft 1 1 have a partial overlap with the openings 13 in the outer shaft 10.
- the partial coverage is favored by the inventive design that the second radial opening 14 on the outer side 28 of the inner shaft 1 1 has a larger cross-section than on the inner side 29 of the inner shaft 1 1.
- the openings 13 are formed in the outer shaft 10 in pairs, and the Angle ⁇ between two adjacent apertures 13 is chosen so that all apertures 14 of the inner shaft 1 1 are partially covered in a Versteil Schlmitte.
- FIG. 5b shows a first end position of the rotation in which two out of four openings 14 in the inner shaft 1 1 are in overlap with openings 13 in the outer shaft 10.
- Figure 5c shows a second end position of the rotation in which two other of the four openings 14 in the inner shaft 1 1 are brought into breakthroughs 13 in the outer shaft 10 in coverage.
- Figures 5a, 5b and 5c show an embodiment of the invention, in which the second radial openings 14 on the outer side 28 of the inner shaft 1 1 have a larger cross section than on the inner side 29 of the inner shaft 1 1.
- the same effect can be achieved in that even in the end positions of the rotation of the inner shaft 1 1 in the outer shaft 10, a full overlap of the two passages 13, 14 is already achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014107475.0A DE102014107475A1 (de) | 2014-05-27 | 2014-05-27 | Verstellbare Nockenwelle mit verbesserter Ölübergabe zwischen Innenwelle und Außenwelle |
PCT/EP2015/059581 WO2015180925A2 (de) | 2014-05-27 | 2015-04-30 | Verstellbare nockenwelle mit verbesserter ölübergabe zwischen innenwelle und aussenwelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3149290A2 true EP3149290A2 (de) | 2017-04-05 |
EP3149290B1 EP3149290B1 (de) | 2018-11-14 |
Family
ID=53180724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15722683.8A Active EP3149290B1 (de) | 2014-05-27 | 2015-04-30 | Verstellbare nockenwelle mit verbesserter ölübergabe zwischen innenwelle und aussenwelle |
Country Status (6)
Country | Link |
---|---|
US (1) | US10208632B2 (de) |
EP (1) | EP3149290B1 (de) |
CN (1) | CN106661965B (de) |
DE (1) | DE102014107475A1 (de) |
HU (1) | HUE042389T2 (de) |
WO (1) | WO2015180925A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015112475B4 (de) * | 2015-07-30 | 2022-06-23 | Thyssenkrupp Presta Teccenter Ag | Verstellnockenwelle |
EP3683412A1 (de) * | 2019-01-21 | 2020-07-22 | Mechadyne International Limited | Konzentrische nockenwelle |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61126007U (de) | 1985-01-29 | 1986-08-07 | ||
JPH0723529Y2 (ja) | 1988-11-16 | 1995-05-31 | 日産工機株式会社 | エンジンの潤滑装置 |
US5823152A (en) * | 1995-06-14 | 1998-10-20 | Nippondenso Co., Ltd. | Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine |
JPH10122228A (ja) * | 1996-10-14 | 1998-05-12 | Toyota Motor Corp | クランクシャフトの製造方法 |
DE102005014680A1 (de) | 2005-02-03 | 2006-08-10 | Mahle International Gmbh | Nockenwelle mit gegeneinander verdrehbaren Nocken für insbesondere Kraftfahrzeuge |
DE102006028611B4 (de) * | 2006-06-22 | 2014-12-31 | Mahle International Gmbh | Verstellbare Nockenwelle |
DE102010033296A1 (de) * | 2010-08-04 | 2012-02-09 | Hydraulik-Ring Gmbh | Nockenwellenversteller, insbesondere mit Nockenwelle |
DE102011076652B4 (de) | 2011-05-27 | 2017-06-01 | Schwäbische Hüttenwerke Automotive GmbH | Vorrichtung zur Verstellung der relativen Drehwinkelposition geschachtelter Nockenwellen |
DE102011077532A1 (de) * | 2011-06-15 | 2012-12-20 | Schaeffler Technologies AG & Co. KG | Phasenverstelleinrichtung einer Nockenwelle für eine Verbrennungskraftmaschine |
CN202215574U (zh) * | 2011-08-15 | 2012-05-09 | 东风康明斯发动机有限公司 | 一种汽车发动机曲轴 |
DE102011082591A1 (de) * | 2011-09-13 | 2013-03-14 | Schaeffler Technologies AG & Co. KG | Axiallagerung bei Doppelnockenwellen, Nockenwellenverstellvorrichtung und Verbrennungskraftmaschine |
-
2014
- 2014-05-27 DE DE102014107475.0A patent/DE102014107475A1/de not_active Ceased
-
2015
- 2015-04-30 US US15/314,444 patent/US10208632B2/en active Active
- 2015-04-30 EP EP15722683.8A patent/EP3149290B1/de active Active
- 2015-04-30 HU HUE15722683A patent/HUE042389T2/hu unknown
- 2015-04-30 WO PCT/EP2015/059581 patent/WO2015180925A2/de active Application Filing
- 2015-04-30 CN CN201580027642.3A patent/CN106661965B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
EP3149290B1 (de) | 2018-11-14 |
US20170183981A1 (en) | 2017-06-29 |
US10208632B2 (en) | 2019-02-19 |
HUE042389T2 (hu) | 2019-06-28 |
WO2015180925A2 (de) | 2015-12-03 |
CN106661965B (zh) | 2019-08-20 |
DE102014107475A1 (de) | 2015-12-03 |
CN106661965A (zh) | 2017-05-10 |
WO2015180925A3 (de) | 2016-01-21 |
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