EP2396520A1 - Ventiltriebumschaltvorrichtung - Google Patents
VentiltriebumschaltvorrichtungInfo
- Publication number
- EP2396520A1 EP2396520A1 EP10702600A EP10702600A EP2396520A1 EP 2396520 A1 EP2396520 A1 EP 2396520A1 EP 10702600 A EP10702600 A EP 10702600A EP 10702600 A EP10702600 A EP 10702600A EP 2396520 A1 EP2396520 A1 EP 2396520A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- switching element
- ventiltriebumschaltvorrichtung
- armature
- freedom
- 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
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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- 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
Definitions
- the invention relates to a valve train switching device according to the preamble of claim 1.
- valve train switching devices for switching a valve train with at least one switching armature element, which is provided for a switching movement, and with a switching element, which is provided for coupling with a shift gate of a cam member known.
- the invention is in particular the object to optimize a triggered by the valve train switching device switching operation. It is achieved according to the invention by the features of claim 1. Further embodiments emerge from the subclaims.
- the invention relates to a valve train switching device, in particular an internal combustion engine, for switching a valve train with at least one switching armature element, which is provided for a switching movement, and with a switching element, which is provided for a coupling with a shift gate of a cam member
- the valve train switching device has a coupling unit, which is provided to couple the switching armature element and the switching element in at least one degree of freedom to each other.
- a coupling unit which is provided to couple the switching armature element and the switching element in at least one degree of freedom to each other.
- the switching element is at least partially formed as a sliding shoe.
- the switching element can be coupled particularly advantageous to the shift gate.
- the switching armature element is at least partially designed as a switching pin.
- the switching element can be coupled in a particularly simple manner to the switching movement of the switching armature.
- the coupling unit is provided for at least one degree of freedom designed as a rotary movement.
- the at least one degree of freedom is formed as a rotational movement about an axis of rotation along a main extension direction of the switching armature element.
- the switching element in its orientation can be adapted particularly advantageously to a course of the slide track and follow the course of a shift curve of the slide track particularly easy.
- the rotational movement is formed as a free rotational movement, in which a possible angle of rotation is 360 ° and thus a free rotational movement is possible. In principle, however, the rotational movement can also be limited.
- the at least one degree of freedom is formed as a rotational movement about an axis of rotation along a main extension direction of the switching element.
- this rotational movement is designed as a limited rotational movement, i. a rotational movement whose possible angle is limited to an angular range less than 360 °.
- the at least one degree of freedom is embodied as a rotational movement about an axis of rotation perpendicular to a main extension direction of the switching armature element and / or perpendicular to a main extension direction of the switching element.
- This can be particularly advantageous a height gradient of the slide track be compensated.
- this rotational movement is formed as a limited rotational movement.
- the coupling unit comprises a ball head and a recess corresponding to the ball head.
- the coupling unit can be structurally particularly simple.
- a coupling unit can thereby be provided which only has degrees of freedom which are designed as rotary movements.
- the ball head is arranged at one end of the switching armature element. This allows a particularly simple design of the coupling unit can be achieved.
- the recess is formed at least partially within the switching element.
- a guide of the switching element can be provided in a particularly simple manner.
- an additional space can be saved by the configuration of the recess formed as a receptacle for the ball head within the switching element.
- “inside the switching element” is to be understood in particular spatially between functional surfaces of the switching element.
- the coupling unit is provided for a positive coupling.
- a coupling between the switching armature element and the switching element can be provided, which is particularly easy to assemble and which has a high load capacity.
- the switching element is formed rotationally asymmetric. This allows an advantageous guidance of the switching element can be achieved by means of the shift gate.
- the term "rotationally asymmetric" should be understood to mean in particular at least partially elliptical.
- the switching element has a slot which is provided to provide a spring means for a positive connection between the switching armature element and the switching element.
- a particularly simple spring means for producing a mounting-friendly form-fitting connection can be provided, since thereby the coupling unit can be provided for a snap connection.
- other spring means for producing a ner snap connection between the switching element and the switching armature conceivable.
- a sleeve inserted into the switching element can be provided to provide a spring means.
- the switching element has a side surface which is at least partially formed as at least one functional surface and which is intended to correspond with at least one edge of a slide track of the shift gate.
- a wandering contact point between the functional surface and the flank of the slide track can be realized, whereby a tolerance to angular errors of components of the valve train switching device can be increased.
- this can be effectively and structurally simple wear of the switching element and the slide track can be reduced.
- a "functional surface” is to be understood as meaning, in particular, a region on the side surface of the switching element for functional coupling with the shifting gate.
- FIG. 1 is a plan view of a valve train switching device with axially displaceable cam elements
- Fig. 5 is a plan view of the switching armature element and the switching element and
- Fig. 6 the switching element in a switched state.
- FIG. 1 shows a valve train switching device for an internal combustion engine.
- the valve drive switching device has at least one cam element 13 which moves axially. bar and rotatably connected to a fundamental wave 30. Furthermore, the valve train switching device has an actuating device 31, by means of which a switching force for displacing the at least one cam element 13 is provided.
- the actuating device 31 has a switching unit 32 with at least one actuation actuator 33 and with a shift gate 12 with at least one slide track 29.
- the actuating actuator 33 comprises a switching armature element 10 and a switching element 11. In a switching position in which the switching armature element 10 is extended, the switching element 11 engages in the switching gate 12, whereby a rotational movement of the cam element 13 is provided in the axially acting switching force. In a neutral position, the switching element 1 1 is withdrawn from the shift gate 12.
- a second, unspecified Betchanistsaktuator for engaging in a second slide track is designed analogously.
- the actuating actuator 33 has a solenoid unit 34 with a stator unit 35 and an armature unit 36.
- the stator unit 35 comprises a coil 37 and a coil core 38, by means of which a coil magnetic field which can be generated by the coil 37 is amplified.
- the armature unit 36 comprises a permanent magnet 39, which is fixedly connected to the switching armature element 10. By means of the coil 37 and the permanent magnet 39, an actuating force is provided for switching the switching armature element 10, which acts along a main extension direction 15 of the switching armature element 10.
- the switching armature element 10 is movably mounted along its main extension direction 15.
- the switching armature element 10 of the Betreli Trentsaktuators 33 is partially formed as a switching pin 40.
- the switching element 11 of the Betreliriensaktuators 33 is formed as a sliding shoe (see Figure 2). Trained as a sliding shoe switching element 11 is made in one piece and is in the switching position in engagement with the slide track 29.
- the shift pin 40 is mounted in an actuator housing 41 of the Bettechnik Trentsaktuators 33. It is guided through the actuator housing 41.
- the permanent magnet 39 interacts with the surrounding material.
- the permanent magnet 39 interacts in particular with the coil core 38 of the electromagnet unit 34, which consists of a magnetizable material.
- the permanent magnet 39 interacts in particular with the actuator housing 41 of the actuating actuator 33.
- the permanent magnet 39 stabilizes the switching element 11 in the switching mode.
- the Betrucistsaktuator 33 is designed as a bistable system, which tends in a de-energized state of the switching position or the neutral position.
- the permanent magnetic field of the permanent magnet 39 interacts with the coil magnetic field of the coil 37.
- an attractive force and a repulsive force can be realized.
- a polarization of the solenoid unit 34 can be adjusted by means of a current direction, with which the coil 37 is energized.
- the coil 37 is energized in the current direction, for which a repulsive force acts between the electromagnet unit 34 and the permanent magnet 39.
- the slide track 29 on an axial and a radial direction component. If the actuating actuator 33 is in the switching position, a rotational movement of the cam element 13 acts as the axially acting force by means of which the cam element 13 is displaced by the axial direction component of the guide track 29.
- the slide track 29 on a Ausspursegment 42 in which a groove bottom 43 of the slide track 29 rises to a base circle level.
- the Ausspursegment 42 acts on the Betrelirsaktuator 33, a force which moves the switching armature element 10 in its neutral position.
- the switching armature element 10 strives in a first phase by an interaction between the permanent magnet 39 and the actuator 41 to the switching position. In a second phase, the switching armature element 10 releases from the groove base 43 and strives for the neutral position by the interaction between the permanent magnet 39 and the spool core 38. The switching armature element 10 is moved by the interaction between the permanent magnet 39 and the spool core 38 in the second phase, regardless of the rotational movement of the cam member 13 in its neutral position.
- the switching armature element 10 and the switching element 11 are coupled to one another in a movable manner by means of a coupling unit 14.
- the coupling unit 14 comprises a ball head 19 arranged at one end 21 of the switching armature element 10 and a recess 20 corresponding to the ball head 19, which is arranged in the switching element 11 (see FIG.
- the switching armature element 10 and the ball head 19 are made in one piece. In an assembled state, the switching armature element 10 and the switching element 11 are positively connected to one another by means of the ball head 19 and the corresponding recess 20.
- the recess 20 of the switching element 11 receives the ball head 19 in itself.
- the switching armature element 10 and the switching element 11 are movably coupled to each other in three degrees of freedom.
- the three degrees of freedom are formed as mutually independent rotational movements between the switching armature element 10 and the switching element 11.
- Rotary axes 16, 18, 44 for all three degrees of freedom are defined by means of the ball head 19 and the recess 20.
- the three axes of rotation 16, 18, 44 have a common point of intersection 45.
- the three axes of rotation 16, 18, 44 are aligned perpendicular to each other (see Figure 6).
- the axis of rotation 16 for the rotational movement of the first degree of freedom runs along the main extension direction 15 of the switching armature element 10.
- the switching element 11 can rotate freely at an angle of 360 ° about the pivot axis 16 formed as the main extension direction 15 of the switching armature element 10.
- the rotational movement of the first degree of freedom can be limited by means of a guide element to a defined angular range, such as, for example, to an angle range adapted to the slide track 29.
- the rotational axis 18 for the rotational movement of the second degree of freedom runs along a main extension direction 17 of the switching element 11 (see FIG. The rotational movement about the axis of rotation 18 is limited.
- the rotational axis 44 for the rotational movement of the third degree of freedom runs perpendicular to the main extension direction 17 of the switching element 11 and perpendicular to the main extension direction 15 of the switching armature element 10.
- the rotational movement about the axis of rotation 44 is also limited.
- the coupling unit 14 has a spring means 23, by means of which the ball head 19 corresponding recess 20 can be widened to introduce the ball head 19 in the recess 20.
- the spring means 23 is formed integrally with the switching element 11.
- the switching element 11 has a slot 22 applied along the main extension direction 17 of the switching element 11.
- the slot 22 is centered in the switching element 11. He passes through the switching element 11 to a substantial part.
- two halves 47, 48 of the switching element 11 are separated from each other by the slot 22.
- a front region 49 the two halves 47, 48 connected by the integral formation of the switching element 1 1 with each other.
- the slot 22 expands for a short period of time, while the ball head 19 is pressed into the recess 20.
- the slot 22 and with it the halves 47, 48 of the shoe formed as a shift element 11 is pressed apart and the ball head 19 engages in the recess 20 a.
- the halves 47, 48 of the switching element 11 snap back into their starting position. Slipping out of the ball head 19 from the recess 20 is prevented by the spring means 23 which is formed by means of the slot 22.
- the switching element 11 embodied as a sliding shoe has a rotationally asymmetrical basic shape 50 (cf., FIG. 5).
- the rotationally asymmetric basic shape 50 of the sliding element designed as a sliding element 11 has two functional surfaces 25, 26, which are formed as parts of a side surface 24 of the switching element 11.
- the functional surfaces 25, 26 are provided for engagement in the slide track 29.
- the functional surfaces 25, 26 are formed as contact surfaces between the switching element 11 and flanks 27, 28 of the slide track 29.
- the functional surfaces 25, 26 correspond to the flanks 27, 28 of the slide track 29.
- a curvature of the functional surfaces 25, 26 is greater than a maximum curvature of the guide track 29.
- a contact point 51 in contact with the corresponding flank 27 of the guide track 29 is defined by the contact between the functional surface 25, 26 with the associated flank 27, 28 , Depending on an angle degree of the guide track 29, a relative position of the contact point 51 moves in relation to the switching element 11 or to the functional surfaces 25, 26 of the switching element 11.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009008422A DE102009008422A1 (de) | 2009-02-11 | 2009-02-11 | Ventiltriebumschaltvorrichtung |
| PCT/EP2010/000429 WO2010091780A1 (de) | 2009-02-11 | 2010-01-26 | Ventiltriebumschaltvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2396520A1 true EP2396520A1 (de) | 2011-12-21 |
| EP2396520B1 EP2396520B1 (de) | 2015-04-01 |
Family
ID=42102521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10702600.7A Active EP2396520B1 (de) | 2009-02-11 | 2010-01-26 | Ventiltriebumschaltvorrichtung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8622035B2 (de) |
| EP (1) | EP2396520B1 (de) |
| JP (1) | JP5315421B2 (de) |
| CN (1) | CN102317583B (de) |
| DE (1) | DE102009008422A1 (de) |
| WO (1) | WO2010091780A1 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011064845A1 (ja) | 2009-11-25 | 2011-06-03 | トヨタ自動車株式会社 | 内燃機関の可変動弁装置 |
| US8955476B2 (en) * | 2009-11-25 | 2015-02-17 | Toyota Jidosha Kabushiki Kaisha | Variable valve operating apparatus for internal combustion engine |
| DE102010024030A1 (de) | 2010-06-16 | 2011-12-22 | Schaeffler Technologies Gmbh & Co. Kg | Aktorvorrichtung zur Verstellung eines Schiebenockensystems |
| DE102011079189A1 (de) * | 2011-07-14 | 2013-01-17 | Schaeffler Technologies AG & Co. KG | Schiebenockensystem mit zwei Pin Aktoreinheiten |
| DE102011052912B4 (de) * | 2011-08-23 | 2023-09-21 | Dr.Ing.H.C.F.Porsche Aktiengesellschaft | Brennkraftmaschine und Ventiltrieb mit Schiebenocken für eine Brennkraftmaschine |
| DE102012103751B4 (de) * | 2012-04-27 | 2023-06-15 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brennkraftmaschine und Ventiltrieb für eine Brennkraftmaschine |
| DE102012011085B4 (de) | 2012-06-02 | 2023-12-07 | Mercedes-Benz Group AG | Ventiltrieb mit einem Schaltelement und einer Schaltkontur für eine Ventilhubumschaltung |
| DE102012105795A1 (de) * | 2012-06-29 | 2014-01-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventiltrieb einer Brennkraftmaschine |
| DE102012213660A1 (de) * | 2012-08-02 | 2014-02-06 | Schaeffler Technologies AG & Co. KG | Magnetaktor eines Schiebenockensystems |
| DE102013001487A1 (de) * | 2013-01-29 | 2014-07-31 | Daimler Ag | Aktuator für eine Nockenwellenverstellvorrichtung |
| JP5854029B2 (ja) * | 2013-11-20 | 2016-02-09 | 株式会社デンソー | 電磁アクチュエータ |
| DE102015217886A1 (de) * | 2015-09-17 | 2017-03-23 | Thyssenkrupp Ag | Verschiebeelement zum Verschieben eines Nockensegmentes |
| JP6853839B2 (ja) * | 2019-01-08 | 2021-03-31 | 本田技研工業株式会社 | 内燃機関の補機装置 |
| DE102020116482A1 (de) * | 2020-06-23 | 2021-12-23 | Eto Magnetic Gmbh | Elektromagnetische Stellvorrichtung mit Positionserkennung |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544628A (en) * | 1994-07-06 | 1996-08-13 | Volkswagen Ag | Valve control arrangement for an internal combustion engine |
| DE19611641C1 (de) * | 1996-03-25 | 1997-06-05 | Porsche Ag | Ventiltrieb einer Brennkraftmaschine |
| DE20114466U1 (de) * | 2001-09-01 | 2002-01-03 | Eto Magnetic Kg | Elektromagnetische Stellvorrichtung |
| DE102004011586A1 (de) * | 2003-03-21 | 2004-10-07 | Audi Ag | Ventiltrieb einer einen Zylinderkopf aufweisenden Brennkraftmaschine |
| DE102005033018A1 (de) * | 2005-07-15 | 2007-01-25 | Schaeffler Kg | Ventiltrieb für eine Brennkraftmaschine |
| DE102006015233B4 (de) * | 2006-03-30 | 2009-04-16 | Eto Magnetic Gmbh | Elektromagnetische Stellvorrichtung |
| DE102006051809A1 (de) | 2006-11-03 | 2008-05-08 | Schaeffler Kg | Stellvorrichtung |
| DE102006059188A1 (de) * | 2006-12-15 | 2008-06-19 | Schaeffler Kg | Aktuator zur Positionierung eines Stellglieds eines variablen Ventiltriebs einer Brennkraftmaschine |
| DE102007010149A1 (de) * | 2007-03-02 | 2008-09-04 | Audi Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit verschiebbarem Nockenträger und Doppelschneckentrieb |
-
2009
- 2009-02-11 DE DE102009008422A patent/DE102009008422A1/de not_active Withdrawn
-
2010
- 2010-01-26 EP EP10702600.7A patent/EP2396520B1/de active Active
- 2010-01-26 CN CN2010800073430A patent/CN102317583B/zh active Active
- 2010-01-26 WO PCT/EP2010/000429 patent/WO2010091780A1/de not_active Ceased
- 2010-01-26 JP JP2011549457A patent/JP5315421B2/ja active Active
-
2011
- 2011-08-10 US US13/136,759 patent/US8622035B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010091780A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5315421B2 (ja) | 2013-10-16 |
| US20120037102A1 (en) | 2012-02-16 |
| JP2012517554A (ja) | 2012-08-02 |
| CN102317583A (zh) | 2012-01-11 |
| CN102317583B (zh) | 2013-07-10 |
| US8622035B2 (en) | 2014-01-07 |
| DE102009008422A1 (de) | 2010-08-12 |
| WO2010091780A1 (de) | 2010-08-19 |
| EP2396520B1 (de) | 2015-04-01 |
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