EP2132417A1 - Vorrichtung zur nockenwellenverstellung einer brennkraftmaschine - Google Patents
Vorrichtung zur nockenwellenverstellung einer brennkraftmaschineInfo
- Publication number
- EP2132417A1 EP2132417A1 EP08708953A EP08708953A EP2132417A1 EP 2132417 A1 EP2132417 A1 EP 2132417A1 EP 08708953 A EP08708953 A EP 08708953A EP 08708953 A EP08708953 A EP 08708953A EP 2132417 A1 EP2132417 A1 EP 2132417A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- inner rotor
- outer rotor
- rotor
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 230000007423 decrease Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 4
- 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 4
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method 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
- 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
- F01L1/34—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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34456—Locking in only one position
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34463—Locking position intermediate between most retarded and most advanced positions
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34466—Locking means between driving and driven members with multiple locking devices
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34469—Lock movement parallel to camshaft axis
Definitions
- the invention relates to a device for adjusting the camshaft of an internal combustion engine, which has a rotatably connected to a camshaft inner rotor which is rotatably adjustable relative to an outer rotor in driving connection with the outer rotor, wherein in the outer rotor at least one sidewalls limited hydraulic chamber is introduced introduced introduced, wherein this is divided by a radially outwardly extending from the inner rotor member into two sub-chambers and wherein for locking the relative movement between the inner rotor and outer rotor two the inner rotor axially passing through locking pins are provided which can engage in two recesses formed in one of the locking lid Side walls are introduced.
- a camshaft adjusting device of this type is known from US 6,450,137 B2.
- the device has an inner rotor, which is screwed by a central screw with the camshaft of the internal combustion engine.
- the outer rotor is connected via a chain or via a toothed belt with the crankshaft in operative connection.
- a relative rotational movement can be initiated, controlled by an external hydraulic application.
- the inner rotor is designed as an impeller having grooves for receiving wings.
- the wings divide a hydraulic chamber into two areas.
- the camshaft adjuster thus has the function of changing the angular position of the camshaft relative to the crankshaft of the internal combustion engine during operation.
- the angular position which can be set with the described embodiment is stored in a characteristic map in an engine control unit and results essentially from the two parameters engine load and engine speed.
- the camshaft adjuster operates on the vane-cell principle, that is, by generating an oil pressure difference in the hydraulic chambers, the camshaft phaser moves in the direction of "early stop” or "late stop".
- the “center lock” differs from the “end stop lock” in that the camshaft adjuster is locked in a defined angular position between the two end positions “early” and “late”, which is advantageous in particular when starting the engine.
- a disadvantage of this design is that due to the tolerance chain of the components, d. H. Namely, the locking pins in their holes and the recesses in the locking lid, a locking clearance results, which - in contrast to that in the Endanschlagsverriegelung - is not adjustable before mounting.
- the locking clearance is essentially determined by the geometrical spacing of the two holes in the inner rotor for receiving the locking pins and the spacing of the two locking recesses (locking slots) in the locking cover.
- the distance is therefore essentially determined by the manufacturing tolerances, wherein in prior art solutions no influence during assembly is possible.
- Of influence are also the game of locking pins in their mounting holes in the inner rotor, the radial bearing clearance of the inner rotor in the outer rotor, the centering of the locking cover on the outer rotor and the dimensional accuracy of the locking link. All these effects make it particularly difficult to maintain a defined locking clearance in a camshaft adjuster of the generic type.
- the present invention is therefore the object of a camshaft adjuster of the type mentioned in such a way that it is possible to obtain even when using a lock in the middle position between "early” and “late” a largely backlash-free arrangement, so that especially the noise remains low. Furthermore, the function of locking and unlocking should be ensured by choosing an optimal, low game.
- the solution of this problem by the invention is characterized in that at least one of the two recesses in the locking cover has a stop surface for the locking pin whose position changes in the circumferential direction as viewed at the radial distance from the axis of the inner rotor.
- the position of both stop surfaces changes with the radial distance from the axis of the inner rotor.
- a preferred embodiment of the invention provides that at least one stop surface, preferably both stop surfaces, has a straight course.
- the stop surface may include an angle to the radial direction.
- the abutment surfaces are arranged so that their distance in the direction of the circumference increases with increasing radial distance from the axis of the inner rotor. Also possible is the reverse configuration, d. H. in that the abutment surfaces are arranged such that their spacing in the circumferential direction decreases with increasing radial distance from the axis of the inner rotor.
- the locking cover is preferably disc-shaped.
- the function of the locking cover is firstly the sealing of the oil chambers and secondly the transmission of the drive torque from the crankshaft to the camshaft when the camshaft adjuster is locked axially.
- camshaft adjusters of the generic type there is too great a locking clearance, as is often the case in previously known solutions.
- FIG. 1 is a schematic side view of a camshaft adjuster, which is connected to a camshaft,
- FIG. 3 shows the front view of the camshaft adjuster in section A-B according to FIG. 1, shown without ancillary units, FIG.
- FIG. 4 shows the upper part of the front view of FIG. 3 in an enlarged
- Fig. 5 is an alternative to Fig. 4 embodiment of the invention.
- a camshaft adjuster 1 is shown only very schematically, with which a camshaft 2 can be adjusted relative to the crankshaft with regard to the angle of rotation.
- An inner rotor 3 and an outer rotor 4 of the camshaft adjuster 1 are indicated, the inner rotor 3 being rotated relative to the outer rotor 4, as will be seen in greater detail below can to move the camshaft between an "early" working position and a "late” working position.
- the camshaft adjuster 1 has a first side wall 5 and a second side wall 6, wherein the second side wall 6 is designed as a locking cover, which is required for the axial locking when the phaser 1, in particular for the start of the engine in a middle position between " to be locked early and late.
- an operative connection between the crankshaft of the internal combustion engine and a drive gear wheel is produced that is non-rotatably connected to the external rotor 4.
- An adjusting mechanism not shown, establishes a relative rotational position between the outer rotor 4 and the inner rotor 3.
- the inner rotor 3 is rotatably screwed by a (not shown) central screw with the camshaft 2 of the internal combustion engine.
- the two figures 1 and 2 differ in that in the case of the solution according to FIG. 1, the locking cover 6 is arranged on the side remote from the camshaft 2 side. However, in the solution according to FIG. 2, the locking cover 6 is positioned on the side of the camshaft adjuster 1 facing the camshaft 2.
- the locking cover 6 of the camshaft adjuster 1 can thus be located on the side facing the engine towards or away. Its axis is aligned coaxially with the axis of the inner / outer rotor 3, 4 or the camshaft 2.
- Fig. 3 the known per se structure of a generic camshaft adjuster 1 can be seen.
- the outer rotor 4 has five incorporated recesses which form hydraulic chambers 7. These are delimited by the two side walls 5, 6 (see Figures 1 and 2).
- the inner rotor 3 in the exemplary embodiment five grooves are incorporated, which in the present case in the radial direction and along the axial direction of the No- Extend shaft adjuster.
- an element 8 is inserted in the form of a wing.
- the wing 8 extends in its assembled state radially to the outer radial boundary of the hydraulic chamber 7.
- the hydraulic chamber 7 is divided into two sub-chambers 9 and 10, which - not shown in detail - are in communication with hydraulic lines on the Hydraulic fluid in the sub-chambers 9, 10 can be initiated.
- the wing 8 can in principle also be designed as a sealing strip or similar element, which can accomplish a subdivision of the hydraulic chamber 7 into two sub-chambers 9, 10.
- the locking of the camshaft adjuster 1 in a center position between “early” and “late” is accomplished by two locking pins 11 and 12, which are inserted into corresponding bores in the inner rotor 3.
- the locking pins are movable by means not shown in the axial direction and act as a locking piston.
- a blockage of the relative rotation between the inner rotor 3 and outer rotor 4 can be made.
- FIGS. 4 and 5 show the locking cover 6 in cooperation with the inner rotor 3 and the outer rotor 4.
- two recesses 13 and 14 are incorporated, which act as scenes. They serve to define stop surfaces 15 and 16 for the two locking pins 11 and 12 which delimit the recesses 13, 14 in the circumferential direction U, so that when the locking pins 11, 12 are locked, the inner rotor 3 relative to the outer rotor 4, on which the Locking lid 6 is fixed, is set in the circumferential direction U, in a central position, as is apparent from Fig. 4 (the wings 8 are located approximately centrally in the hydraulic chamber 7).
- both recesses 13, 14 - a stop surface 15, 16 for the locking pin 11, 12 such that their Position - viewed in the circumferential direction U - changed with the radial distance r from the axis 17 of the inner rotor 3.
- the two stop surfaces 15 and 16 formed here are arranged at an angle ⁇ to the radial direction R, which in the present case is approximately 15 °.
- the two abutment surfaces 15, 16 are oriented in the opposite direction. This means that here the play between locking pins 11, 12 and abutment surfaces 15, 16 decreases when the locking cover 6 is moved relative to the outer rotor 4 radially outward. Accordingly, it becomes larger when the lock cover 6 is moved radially inward.
- This effect can be used to adjust the clearance between the locking pins 11, 12 and the abutment surfaces 15, 16 in the locking cover 6 during assembly of the camshaft adjuster.
- a relative displacement of the locking cover 6 relative to the outer rotor 4 is made possible in the exemplary embodiment according to FIGS. 4 and 5 by an embodiment of the fastening possibility of the locking cover 6 on the outer rotor 4, as indicated by the reference numerals 18 and 18 '.
- a bore 18, which is introduced for the passage of a fastening screw in the locking cover 6 meets a trained as a through hole counterbore 18 'in the outer rotor 4, which is formed larger and thus a radial displacement of the locking cover 6 relative to External rotor 4 allows.
- the locking cover 6 is designed as a thin-walled disc. In the center of a circular recess 19 is provided, which allows the mounting of the camshaft adjuster to the engine by means of a central screw.
- the outer diameter of the locking cover 6 corresponds to that of the outer rotor. 4
- the number of holes 18 in the locking cover 6 is dependent on the number of existing in the camshaft adjuster hydraulic chambers 7.
- the holes 18 may be formed as passage or threaded holes.
- the procedure is as follows: When setting the locking game is - similar to the prior art locking in an end stop - the locking cover 6 positioned in the required position to the outer rotor 4 and then fixed.
- the outer rotor 4 (stator) is fixed in a mounting device.
- the inner rotor 3 is aligned in the outer rotor 4 with respect to the center locking position and also fixed.
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)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007011282A DE102007011282A1 (de) | 2007-03-08 | 2007-03-08 | Vorrichtung zur Nockenwellenverstellung einer Brennkraftmaschine |
| PCT/EP2008/051737 WO2008107275A1 (de) | 2007-03-08 | 2008-02-13 | Vorrichtung zur nockenwellenverstellung einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2132417A1 true EP2132417A1 (de) | 2009-12-16 |
| EP2132417B1 EP2132417B1 (de) | 2010-12-29 |
Family
ID=39462143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08708953A Not-in-force EP2132417B1 (de) | 2007-03-08 | 2008-02-13 | Vorrichtung zur nockenwellenverstellung einer brennkraftmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8240280B2 (de) |
| EP (1) | EP2132417B1 (de) |
| AT (1) | ATE493568T1 (de) |
| DE (2) | DE102007011282A1 (de) |
| WO (1) | WO2008107275A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012203114B4 (de) | 2012-02-29 | 2020-06-18 | Schaeffler Technologies AG & Co. KG | Einlegeteil für Nockenwellenversteller mit Mittenverriegelung, sowie Steuertrieb und Verbrennungskraftmaschine damit |
| DE102012209027B4 (de) * | 2012-05-30 | 2017-06-22 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
| DE102012211870A1 (de) | 2012-07-06 | 2014-01-09 | Schaeffler Technologies AG & Co. KG | Hydraulischer Nockenwellenversteller mit Mittenverriegelung und einstellbarem Verriegelungsspiel |
| DE102016220943A1 (de) | 2016-10-25 | 2018-04-26 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller mit Verriegelungsmechanismus |
| CN109281724B (zh) * | 2017-07-21 | 2022-07-26 | 舍弗勒技术股份两合公司 | 凸轮轴调节器和内燃机 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6006709A (en) * | 1995-06-14 | 1999-12-28 | 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 |
| JP2000230511A (ja) * | 1998-12-07 | 2000-08-22 | Mitsubishi Electric Corp | ベーン式油圧アクチュエータ |
| DE10064222B4 (de) | 1999-12-24 | 2006-02-09 | Aisin Seiki K.K., Kariya | Verstellbares Ventilsteuersystem |
| DE10253496B4 (de) * | 2001-11-21 | 2017-03-16 | Schaeffler Technologies AG & Co. KG | Verfahren zum Betreiben eines hydraulischen Nockenwellenversteller s |
| DE10218201C1 (de) | 2002-04-24 | 2003-10-30 | Porsche Ag | Nockenwellenversteller für eine veränderbare Ventilsteuerung |
| DE102004022097A1 (de) | 2004-05-05 | 2005-12-08 | Daimlerchrysler Ag | Hydraulischer Nockenwellenversteller und Verfahren zur Montage desselben |
| DE102004050236A1 (de) * | 2004-10-15 | 2006-05-11 | Daimlerchrysler Ag | Hydraulischer Nockenwellenversteller für eine Nockenwelle einer Brennkraftmaschine |
| DE102005036917A1 (de) | 2005-08-05 | 2007-02-08 | Schaeffler Kg | Verriegelungseinrichtung für einen Nockenwellenversteller einer Brennkraftmaschine |
| JP4400546B2 (ja) * | 2005-10-28 | 2010-01-20 | 日産自動車株式会社 | 内燃機関の可変バルブタイミング装置 |
-
2007
- 2007-03-08 DE DE102007011282A patent/DE102007011282A1/de not_active Withdrawn
-
2008
- 2008-02-13 DE DE502008002149T patent/DE502008002149D1/de active Active
- 2008-02-13 WO PCT/EP2008/051737 patent/WO2008107275A1/de not_active Ceased
- 2008-02-13 EP EP08708953A patent/EP2132417B1/de not_active Not-in-force
- 2008-02-13 AT AT08708953T patent/ATE493568T1/de active
- 2008-02-13 US US12/529,961 patent/US8240280B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008107275A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100083924A1 (en) | 2010-04-08 |
| ATE493568T1 (de) | 2011-01-15 |
| DE102007011282A1 (de) | 2008-09-11 |
| EP2132417B1 (de) | 2010-12-29 |
| WO2008107275A1 (de) | 2008-09-12 |
| DE502008002149D1 (de) | 2011-02-10 |
| US8240280B2 (en) | 2012-08-14 |
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Inventor name: WEISS, MICHAEL Inventor name: BUSSE, MICHAEL |
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