EP2766581A1 - Camshaft and functional elements for a camshaft - Google Patents
Camshaft and functional elements for a camshaftInfo
- Publication number
- EP2766581A1 EP2766581A1 EP12778262.1A EP12778262A EP2766581A1 EP 2766581 A1 EP2766581 A1 EP 2766581A1 EP 12778262 A EP12778262 A EP 12778262A EP 2766581 A1 EP2766581 A1 EP 2766581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner shaft
- shaft
- functional
- outer shaft
- camshaft
- 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
- 230000004308 accommodation Effects 0.000 abstract 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—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
-
- 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
- F01L1/08—Shape of 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
- F01L1/34—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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
-
- 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
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/17—Maintenance; Servicing
Definitions
- the invention relates to a camshaft, in particular for motor vehicle engines, with an outer shaft and an inner shaft arranged coaxially in the outer shaft, with first functional elements fixedly arranged on the outer shaft, with second functional elements which are rotatably arranged on the outer shaft and rotationally fixed to the inner shaft are fixed and with a connected to the outer shaft and inner shaft phase divider for rotating the inner shaft relative to the outer shaft, wherein the phase divider is attached by applying a torque to the inner shaft.
- a generic camshaft is known from DE 10 2010 036 145 A1. Opposite the phase adjuster, a recess is provided on an end face of the inner shaft, which allows a centering or holding during assembly.
- At least part of the first functional elements as well as the second functional elements are cams which can control the inlet or outlet of an internal combustion engine.
- cams By adjusting the cam attached to the inner shaft relative to the cam attached to the outer shaft, a variable control of the valves of the internal combustion engine is possible. For example, depending on the load and speed, the ratio of inlet time to outlet time can be changed.
- the rotation of the inner shaft and outer shaft is effected by a phase splitter, which is also referred to as a phaser.
- the phase divider usually includes a stator connected to the outer shaft and a rotor connected to the inner shaft.
- the motor is rotatably connected via the inner shaft and the rotor is connected to the outer shaft.
- Bindings are also known releasable connections by screwing.
- the screwing is usually carried out by means of a central screw, which rests in the fixed state on an end face of the phaser and engages in a receptacle of the inner shaft.
- a holding torque opposite to the tightening torque must be applied. Since the inner shaft is disposed within the outer shaft, this is held in the tightening of the central screw at the opposite end of the shaft.
- a mounting tool is provided in practice, which engages in an associated receptacle of the inner shaft.
- JP 2004 044 445 A relates to a generic, non-adjustable camshaft in which all cams are fixedly mounted on a solid rod. Accordingly, the camshaft includes no mutually movable parts or a phase splitter. In order to be able to hold the entire shaft during assembly, a hexagonal structure is arranged on a separate end piece independently of the individual cams.
- the invention has for its object to reduce the twisted length of the inner shaft with an attachment of the phaser on the inner shaft by applying a torque and thus to increase the accuracy and reproducibility.
- the object is achieved in that one of the non-rotatably connected to the inner shaft second functional elements outside a functional surface has shell-side tool receiving surfaces.
- the second functional element provided with the tool receiving surfaces may be one of the cams connected to the inner shaft, a sensor wheel, a bearing element or a bearing ring.
- a second functional element is used, which is close to the phaser, so that the smallest possible toroidal length is achieved.
- the functional elements connected to the inner shaft have, on the one hand, a functional surface and, on the other hand, an axially offset annular collar, wherein the fastening of the functional elements to the inner shaft by means of a connecting element, for example, with a pen occurs.
- the tool receiving surfaces can then be generated in a particularly simple manner on the annular collar.
- the tool receiving surfaces are formed as key surfaces for receiving a tool key. For example, two circumferentially opposite surfaces, a polygon or a differently shaped profile shape with teeth, or polygonal shape or the like may be provided.
- the phase divider has a component connected to the outer shaft and a component connected to the inner shaft, wherein the connection with the inner shaft is expediently effected by a central screw.
- the component connected to the inner shaft is preferably the rotor of the phaser.
- the subject matter of the invention is also a functional element for a camshaft, in particular a cam, with a hub, a shell-side functional surface and an annular collar offset from the functional surface along the axis of the hub, wherein the previously described tool-receiving surfaces are formed on the annular collar.
- Fig. 1 is an adjustable camshaft, with a releasably attached
- FIG. 3 shows a partial region of the camshaft shown in FIG. 2 in a longitudinal section along the line A-A of FIG. 2, FIG.
- Fig. 5 shows an alternative embodiment of a cam connected to the inner shaft
- FIG. 7a and 7b a section of an adjustable camshaft with an alternative embodiment of a cam connected to the inner shaft in a perspective or a side view.
- Fig. 1 shows the known from the prior art construction of an adjustable camshaft of an internal combustion engine with an outer shaft 1 and a coaxially arranged in the outer shaft 1 inner shaft 2.
- first functional elements 3 are fixed in the form of cams.
- second functional elements 4a, 4b are non-rotatably mounted in the form of cams and in the form of a sensor wheel.
- a phase divider 5 is arranged on the front side.
- the phase divider 5 which is also referred to as a phaser, has a stator 6 connected to the outer shaft 1 and a rotor 7 connected to the inner shaft 2.
- a rotation between the stator 6 and the rotor 7 can take place, for example, hydraulically, so that a controlled actuation of the inner shaft 2 with respect to the outer shaft 1 is possible by means of a corresponding activation.
- the rotor 7 is fastened with a central screw 8 by applying a tightening torque to the inner shaft 1.
- the attachment of the second functional elements 4a, 4b on the inner shaft takes place in the embodiment by connecting elements 9 such as pins, which are pressed during assembly and are passed through not shown in the figures longitudinal slots of the outer shaft 1.
- the inner shaft 2 In order to secure the rotor 7 by means of the central screw 8 on the inner shaft 2, the inner shaft 2 must be held in the tightening of the central screw 8. According to the
- a tool holder 10 is provided at the opposite end of the inner shaft 2.
- FIG. 2 shows an embodiment according to the invention, in which the first functional element 4a in the form of a cam with shell-side tool receiving surfaces 11 is provided by the second functional elements 4a, 4b connected to the inner shaft 2. These tool receiving surfaces 11 are located on an annular collar 13 outside the actual functional surface 12a, which has the cam shape intended for controlling the valves. It is particularly advantageous if, starting from the phase divider 5, the first of the second functional elements 4a, 4b is already equipped with tool receiving surfaces 11.
- FIG. 2 further shows that not only one cam, but also another second functional element 4b in the form of a sensor wheel can be provided with tool receiving surfaces 11, the arrangement of the tool receiving surfaces 11 being outside the functional surface 12b of the sensor wheel takes place on a ring collar 13.
- FIGS. 3, 4a and 4b The details of the second functional element 4a in the form of a cam shown in FIG. 2 are shown in FIGS. 3, 4a and 4b.
- Fig. 3 it can be seen that the annular collar 13 is weakened by the introduction of the tool receiving surfaces 1 1 to a certain extent. Against this background, it is expedient if, according to the exemplary embodiment, the tool receiving surfaces 1 1 are offset relative to the pin on the circumference of the annular collar 13 by 90 °.
- Fig. 5 shows an alternative embodiment, in which instead of two exactly opposite tool receiving surfaces 1 1, the shape of a polygon is realized. This results in the advantage that a tool for holding in different orientations can be applied.
- FIG. 6 shows an embodiment in which two opposite tool receiving surfaces 11 are arranged on the second functional element 4b in the form of a sensor wheel.
- the accuracy and reliability in the attachment of the phaser 5 on the inner shaft 2 by means of the central screw 8 can be increased.
- the tool receiving surfaces 1 1 but also can be used otherwise to hold the associated second functional elements 4a, 4b, for example, when the second functional elements 4a are ground in the form of cams before or after assembly to measure.
- FIGS. 7a and 7b show the section of a camshaft with an alternative embodiment of the second functional elements 4a connected to the inner shaft 2 in the form of cams.
- the cam has no annular collar 13.
- the functional surface 12a is interrupted by a recess 14 at a portion of the lateral surface of the cam, wherein in the recess on the one hand, the connecting element 9 is arranged in the form of a pin and the tool receiving surfaces 1 1 are provided.
- the described alternative design of the second fun ction elements 4a leads to a lower material and space requirements.
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 |
---|---|---|---|
DE102011054350A DE102011054350A1 (en) | 2011-10-10 | 2011-10-10 | Camshaft and functional elements for a camshaft |
PCT/EP2012/069866 WO2013053669A1 (en) | 2011-10-10 | 2012-10-08 | Camshaft and functional elements for a camshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2766581A1 true EP2766581A1 (en) | 2014-08-20 |
EP2766581B1 EP2766581B1 (en) | 2015-09-09 |
Family
ID=47076169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12778262.1A Active EP2766581B1 (en) | 2011-10-10 | 2012-10-08 | Camshaft and functional elements for a camshaft |
Country Status (5)
Country | Link |
---|---|
US (1) | US9200544B2 (en) |
EP (1) | EP2766581B1 (en) |
CN (1) | CN103987927B (en) |
DE (1) | DE102011054350A1 (en) |
WO (1) | WO2013053669A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011052822A1 (en) * | 2011-08-18 | 2013-02-21 | Thyssenkrupp Presta Teccenter Ag | Camshaft, in particular for motor vehicle engines |
DE102013216567A1 (en) * | 2013-08-21 | 2015-02-26 | Mahle International Gmbh | alignment |
DE102013113444A1 (en) * | 2013-12-04 | 2015-06-11 | Thyssenkrupp Presta Teccenter Ag | Receiving assembly for grinding a camshaft and method for grinding the camshaft |
KR101427904B1 (en) * | 2014-07-10 | 2014-08-08 | 주식회사 미보 | Concentric cam shaft and manufacturing method of rotation cam and fixed cam for concentric cam shaft |
DE102015200139B4 (en) * | 2015-01-08 | 2021-07-08 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster connection to a double camshaft |
DE102015113356A1 (en) * | 2015-08-13 | 2017-02-16 | Thyssenkrupp Ag | Adjustable camshaft with a phase plate |
DE102015113520A1 (en) * | 2015-08-17 | 2017-02-23 | Thyssenkrupp Presta Teccenter Ag | module assembly |
FR3043716B1 (en) * | 2015-11-12 | 2019-10-11 | Psa Automobiles Sa. | VARIABLE DISTRIBUTION ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE |
DE102016206672A1 (en) | 2016-04-20 | 2017-10-26 | Mahle International Gmbh | Method for gripping and holding an adjustable camshaft |
DE102016206674A1 (en) | 2016-04-20 | 2017-10-26 | Mahle International Gmbh | Method for gripping and holding an adjustable camshaft |
GB2556921B (en) * | 2016-11-25 | 2019-03-13 | Ford Global Tech Llc | A method of adaptively controlling a motor vehicle engine system |
DE102021213496A1 (en) | 2021-11-30 | 2023-06-01 | Thyssenkrupp Ag | Method for assembling a functional element on a sliding camshaft with the aid of an assembly tool and using external teeth or a non-round section of a sliding camshaft |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2277361B (en) * | 1993-04-21 | 1995-11-08 | T & N Technology Ltd | Manufacture of camshafts |
JP4082109B2 (en) * | 2002-07-10 | 2008-04-30 | 日産自動車株式会社 | Assembled camshaft for internal combustion engine |
DE102005040934A1 (en) * | 2005-02-03 | 2006-08-17 | Mahle International Gmbh | Adjustable camshaft, in particular for internal combustion engines of motor vehicles, with a hydraulic adjusting device |
DE102006012611A1 (en) * | 2006-03-20 | 2007-09-27 | Mahle International Gmbh | Cylinder head of an internal combustion engine |
DE102007017094A1 (en) * | 2007-04-10 | 2008-10-16 | Mahle International Gmbh | Cam for a cam or control shaft |
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 |
US8096275B2 (en) | 2009-09-15 | 2012-01-17 | GM Global Technology Operations LLC | Camshaft having a tuned mass damper |
DE102010024721A1 (en) * | 2010-06-23 | 2012-03-29 | Mahle International Gmbh | Cam and associated camshaft |
JP5234191B2 (en) * | 2010-12-28 | 2013-07-10 | トヨタ自動車株式会社 | Double camshaft structure and assembly method of double camshaft structure |
-
2011
- 2011-10-10 DE DE102011054350A patent/DE102011054350A1/en not_active Withdrawn
-
2012
- 2012-10-08 CN CN201280049683.9A patent/CN103987927B/en active Active
- 2012-10-08 EP EP12778262.1A patent/EP2766581B1/en active Active
- 2012-10-08 US US14/350,412 patent/US9200544B2/en active Active
- 2012-10-08 WO PCT/EP2012/069866 patent/WO2013053669A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013053669A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN103987927B (en) | 2016-10-26 |
EP2766581B1 (en) | 2015-09-09 |
CN103987927A (en) | 2014-08-13 |
US9200544B2 (en) | 2015-12-01 |
WO2013053669A1 (en) | 2013-04-18 |
US20140245980A1 (en) | 2014-09-04 |
DE102011054350A1 (en) | 2013-04-11 |
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