WO2001044628A1 - Rotationskolbenversteller - Google Patents
Rotationskolbenversteller Download PDFInfo
- Publication number
- WO2001044628A1 WO2001044628A1 PCT/EP2000/011990 EP0011990W WO0144628A1 WO 2001044628 A1 WO2001044628 A1 WO 2001044628A1 EP 0011990 W EP0011990 W EP 0011990W WO 0144628 A1 WO0144628 A1 WO 0144628A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compression spring
- rotary piston
- camshaft
- piston adjuster
- adjuster according
- Prior art date
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
- 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
- F01L2001/34483—Phaser return springs
Definitions
- the invention relates to a rotary piston adjuster for adjusting the angle of rotation of the camshaft of an internal combustion engine, in particular according to the preamble of claim 1.
- the camshaft or the entire valve train of the internal combustion engine have a frictional torque which counteracts their drive torque and tries to adjust the rotary piston adjuster late. This supports its late adjustment and inhibits its early adjustment, which leads to different adjustment speeds in the direction of early and late. Furthermore, the locking and unlocking of the rotary piston adjuster is influenced by the camshaft friction torque. Due to the friction-related late adjustment, the adjusters of the exhaust camshaft, which lock in the early position, tend to jam when the locking element is locked out. The reason for this is that the camshaft friction torque and the oil pressure of the working chamber A intended for unlocking load the locking element away from the early stop in the direction of the late stop and thereby jam.
- Unlocking in the late position is not critical, especially if the camshaft friction torque acting in the direction of the late position is on one of the Locking element separate late stop is supported and thereby relieves the locking element.
- a known means of compensating for the unequal adjustment speed and of facilitating the unlocking in the early position are compression springs arranged in the advance adjustment chambers, the moment of which is opposed to the camshaft friction torque.
- the generic DE 197 26 300 A1 describes a rotary piston adjuster for adjusting the angle of rotation of the camshaft of an internal combustion engine, which has an outer rotor connected to a drive wheel and an inner rotor connected to the camshaft, the outer rotor having at least one hydraulic chamber with radial partition walls and the inner rotor having at least one swivel wing possesses, which divides the hydraulic chamber into a working chamber A and B, and which is hydraulically pivotable between a late and an early stop position, a locking device suitable for releasably connecting the outer and inner rotors and at least one compression spring opposing the friction torque of the camshaft between two rotors are provided.
- the invention is based on the object of creating a generic rotary piston adjuster which allows a free design of the compression spring within a wide range and low-wear operation with it. Summary of the invention
- the attachment also offers space for a compression spring that is longer than a hydraulic chamber of the rotary piston adjuster.
- a larger spring length enables a low spring constant, which causes a desired low increase in spring force over the swivel angle of the inner rotor. This is particularly important in the case of compression springs, the spring force of which is so great that they cause the rotary piston adjuster to bear firmly against the early stop, thereby obviating locking at the early stop.
- the required stabilization of a long compression spring is made possible by the wear-resistant components of the attachment, in which the compression spring is supported and guided. A selective support of the same can additionally reduce the wear.
- the attachment element has an intermediate plate with a side window and a cover, as well as a disk-shaped bushing, which together form a side end of the side of the outer rotor remote from the camshaft. Since the add-on element is also the side closure of the outer rotor, axial installation space is saved.
- the attachment can also be arranged on the camshaft side, the drive wheel being designed as an intermediate plate with a locking device and stops and the side remote from the camshaft being closed with an additional cover.
- the intermediate plate which is connected to the outer rotor, to have a coaxial bore, with an arc segment-shaped recess on the circumference thereof a radially standing end surface is arranged.
- the length of the arc-segment-shaped recess can be selected in accordance with the desired length of the compression spring.
- the disk-shaped bushing which is connected to the inner rotor, is sealingly guided in the coaxial bore of the intermediate plate and between the side window and the cover, and that a pin with at least one radially standing side surface is provided on the circumference of the disk-shaped bushing , which is arranged pivotably in the arcuate segment-shaped recess.
- the compression spring is clamped in the arc segment-shaped recess between its radially standing end surface and the radially standing side surface of the pin and rests against the circumference of the arc segment shaped recess. In this way, the compression spring is supported over its entire length and acts on the outer rotor via the intermediate plate and on the inner rotor via the disk-shaped bushing with its spring torque.
- an advantageous further development of the invention consists in that the cover has a groove-shaped bulge which laterally widens the arc segment-shaped recess and offers space for a compression spring with a round winding cross section. In this way, the compression spring is also guided laterally and thus achieves maximum dimensional stability.
- the radial height of the recess and the pin is greater than the winding diameter of the compression spring, this can not only rest on the circumference of the recess, but can also be installed with the aid of spacer arches on a smaller diameter.
- the spring torque can be adjusted in this way and by different preloading of the compression spring. It is also conceivable to arrange two or more compression springs one above the other whose turns are separated from one another by intermediate plates. It is also conceivable that further recesses in the intermediate plate and further pins are provided for further pressure springs connected in parallel. All these options allow the spring moment of the Varying the compression spring within wide limits and adapting it to the camshaft friction torque or a value above or below it.
- the compression spring is pre-bent in an arc and thus already obtains the desired bending radius during manufacture, the additional stresses and additional radial forces on the spring supports that are possible when bending straight compression springs due to shape deviations are avoided.
- the trough-shaped bulge of the cover is superfluous if another compression spring is provided, which has an oval winding cross section of the width of the intermediate plate.
- An alternative embodiment of the invention is that a rotary piston adjuster is provided with an extended other hydraulic chamber, in which at least one further compression spring is arranged, which is supported at least selectively on another partition and on another swivel wing and on the inner circumference of another outer rotor.
- at least one further compression spring is arranged, which is supported at least selectively on another partition and on another swivel wing and on the inner circumference of another outer rotor.
- An adjuster unit with an external stop and compression spring in one of the hydraulic chambers is also conceivable.
- a variant with an internal stop and external spring attachment in an attachment is also possible.
- the compression spring can be a locking unit (e.g. locking body, Replace locking pin or locking wing).
- the adjustment of the adjustment speeds for an adjuster with late locking can also be achieved with external and internal spring arrangements. If there is a problem with unlocking and locking in the case of an adjuster unit that locks in the late position, the compression spring can be installed so that it acts in the late direction. It supports the camshaft friction torque, ie the adjustment speeds differ even more than before. In this case too, a locking unit can be dispensed with if the spring is designed accordingly.
- FIG. 1 shows the section A-A through a rotary wing adjuster according to the invention of Figure 2;
- Figure 2 shows the section B-B through the rotary wing adjuster of Figure 1;
- Figure 3 shows the section C-C through an attachment of the rotary wing adjuster of Figure 1;
- Figure 3a shows the enlarged detail Y of the locking device of Figure 3;
- Figure 3b shows a pre-bent compression spring
- FIG. 4 shows a view of the side of the rotary vane adjuster from FIG. 1 remote from the camshaft;
- Figure 5 shows the section B-B through a vane adjuster of Figure 6;
- Figure 6 shows the section A-A through the vane adjuster of Figure 5 with a compression spring in an extended other hydraulic chamber.
- FIG. 1 shows a longitudinal section AA through a rotary vane adjuster 1 from FIG. 2, with an outer rotor 2 and an inner rotor 3.
- the outer rotor 2 has on its side remote from the camshaft an attachment 4 with an intermediate plate 5, which has a side window 6 and a cover 7 and which together with a disk-shaped bushing 11 form the side end of the outer rotor 2 remote from the camshaft.
- a drive wheel 9 forms the end of the camshaft side of the outer rotor 2.
- the intermediate plate 5, the side window 6, the cover 7 and the drive wheel 9 are clamped together with the outer rotor 2 by screws 10.
- the disk-shaped bushing 11 is screwed to the inner rotor 3 via a sealing ring carrier 13 by a central screw (not shown).
- the sealing ring carrier 13 seals the rotary piston adjuster from the cover 7.
- a sleeve 15 is arranged, which brings about a separate pressure oil supply through first lines 16 to the working chambers A and through second lines 17 to the working chambers B.
- the cross section BB of FIG. 2 through the rotary vane adjuster 1 of FIG. 1 shows the outer rotor 2 with hydraulic chambers 18 which are delimited by partition walls 19 with radially standing side surfaces 20 and by swivel vanes 21 are sealed with parallel side surfaces 22 in working chambers A and B.
- the swivel blades 21 are formed in one piece with the inner rotor 3.
- FIG. 3 shows a cross section C-C through the attachment 4 of the rotary leaf adjuster 1 from FIG. 1, while the locking device 8 is shown enlarged in FIG. 3a.
- the intermediate plate 5 has a coaxial bore 12, on the circumference of which an arc segment-shaped recess 23 with at least one radially standing end surface 24 is arranged.
- a pin 25 with at least one radially standing side surface 26 is provided, which is pivotably arranged in the arc-segment-shaped recess 23.
- a compression spring 27 is tensioned, which rests against the inner circumference of the recess 23 and exerts a torque in the direction of the early stop on the inner rotor 3 via the pin 25.
- the compression spring 27 is pre-bent with the desired bending radius. This avoids the additional stresses and additional radial forces on the spring supports that are possible when bending straight compression springs due to shape deviations.
- the other compression spring 27 ′ shown in FIG. 3b has an oval winding cross section (see FIG. 3c) which fits into the width of the recess 23 in the form of an arc segment.
- the usually circular winding cross section projects at least on one side beyond the arc segment-shaped recess 23. This is taken into account by a trough-shaped bulge 28 which is fitted in the cover 7 and widens the arc-segment-shaped recess 23 (see FIGS. 1 and 4).
- a second pin 29 with a first and a second radially standing other side surface 30, 31 is arranged on the circumference of the disk-shaped bushing 11, said second pin being in a second segment 32 of the intermediate plate 5 in the shape of an arcuate segment between the as Late stop 33 and radially standing as an early stop 34 End faces of the arc-shaped second recess 32 is pivotally arranged.
- the intermediate plate 5 has a radial guide groove 35 for a parallel first and second guide surface 36, 37 of a locking body 38 loaded by a locking spring 43. This is inserted by the force of the locking spring 43 when the internal combustion engine runs out and when the second pin 29 abuts the late stop 33 into the arc-shaped recess 35 until the pressure contact between a pressure contact surface 39 of the locking body 38 and the second radially standing other side surface 31 of the second pin 29 ,
- the sliding direction of the locking body 38 is oriented at an acute angle ⁇ towards the second radially standing other side surface 31 of the second pin 29.
- the force acting in the circumferential direction on the second journal 29 compensates for the torsional backlash between the crankshaft-fixed and camshaft-fixed components due to assembly and wear.
- the spring-remote end 40 of the blocking body 38 is in flow connection with the working chamber A via a radial flow groove 41 arranged in the disk-shaped bushing 11 and the spring-side end of the blocking body 38 is in flow connection with the working chamber B via a vent hole 42.
- This arrangement is suitable for the jam-free locking of the locking body 38 of an intake camshaft adjuster. This is preferably blocked at the late stop, in the direction of which the intake camshaft is acted upon by its frictional torque when the engine is started and the locking body 38 is relieved.
- a stepped locking body which is acted upon by the oil pressure of working chambers A and B, is generally required for locking without jamming. Since the radius of the spring-distal end 40 of the locking body 38 is larger than the outer radius of the disk-shaped bush 11, there is only a line contact reducing the friction between the two surfaces.
- FIG. 5 shows a cross section B-B through a vane adjuster 44 from FIG. 6, with another outer rotor 2 ', the outer circumference of which has a toothing 45 and the sides of which are closed by a first and second end cover 46, 47.
- a locking pin 48 is shown in the locked position.
- Figure 6 shows a cross section A-A through the vane adjuster 44 of Figure 5, with the other outer rotor 2 ', the other partitions 19' and with the other inner rotor 3 ', which has other pivoting wings 21'.
- the pivoting wings 21 ' are pivoted hydraulically between an internal late stop 33' and an internal early stop 34 'of the other partition walls 19'.
- a further compression spring 27 ′′ is arranged in an extended other hydraulic chamber 18 ′. There it is supported on the other partition wall 19 ′ and the other swivel wing 21 ′ and lies against the inner peripheral surface of the other outer rotor 2 ′.
- the rotary piston adjuster according to the invention is characterized in that the compression spring 27, 27 ', which is arranged either in an external attachment 4 or internally in another hydraulic chamber 18', compensates for the friction torque of the camshaft. This achieves a uniform adjustment speed of the camshaft in both adjustment directions. If this criterion resigns, a correspondingly designed and arranged compression spring 27, 27 ', 27 "can replace the locking unit by 11 brings the rotor 3 against the stop to be locked. Due to the wedge effect of the locking body 38, the external locking unit 8 allows a compensation of the torsional play between the crankshaft and the camshaft-fixed components in the locked position due to assembly and wear. This prevents rattling noises under the alternating torque of the outgoing and starting camshaft and, thanks to the wear-resistant design of the attachment 4, is permanently avoided.
- the attachment 4 according to the invention with the locking device 8 and the late and early stop 33, 34 and the compression spring 27 is moreover suitable for attachment to any type of rotary piston adjuster and, moreover, also for those camshaft adjusters which operate on the principle of orbit slow-running -Hydromotor based.
- Inner rotor 27 "further compression spring 'other inner rotor 28 trough-shaped bulge
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
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/168,366 US6769386B2 (en) | 1999-12-18 | 2000-11-30 | Adjusting element for a rotary piston |
DE10083949T DE10083949B4 (de) | 1999-12-18 | 2000-11-30 | Rotationskolbenversteller |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19961192.0 | 1999-12-18 | ||
DE19961192A DE19961192A1 (de) | 1999-12-18 | 1999-12-18 | Rotationskolbenversteller |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001044628A1 true WO2001044628A1 (de) | 2001-06-21 |
Family
ID=7933231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/011990 WO2001044628A1 (de) | 1999-12-18 | 2000-11-30 | Rotationskolbenversteller |
Country Status (3)
Country | Link |
---|---|
US (1) | US6769386B2 (de) |
DE (2) | DE19961192A1 (de) |
WO (1) | WO2001044628A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7165521B2 (en) * | 2002-12-24 | 2007-01-23 | Aisin Seiki Kabushiki Kaisha | Variable valve timing control device |
WO2007071528A1 (de) * | 2005-12-20 | 2007-06-28 | Schaeffler Kg | Nockenwellenversteller mit einer verriegelungseinrichtung |
CN100414076C (zh) * | 2003-07-22 | 2008-08-27 | 爱信精机株式会社 | 可变阀门定时控制装置 |
WO2015158345A3 (de) * | 2014-04-17 | 2015-12-30 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7190976B2 (en) | 2000-10-02 | 2007-03-13 | Microsoft Corporation | Customizing the display of a mobile computing device |
CN102720630B (zh) * | 2012-06-08 | 2014-09-24 | 燕山大学 | 双转子壳体转动凸轮连杆滚柱多速马达 |
DE102018128865A1 (de) | 2018-11-16 | 2020-05-20 | Schaeffler Technologies AG & Co. KG | Hydraulischer Nockenwellenversteller |
WO2022011250A1 (en) | 2020-07-10 | 2022-01-13 | Zephyros, Inc. | Composite sleeve for forming a cure in place pipe, composite pipes, and materials and methods thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237616A (en) * | 1975-09-19 | 1977-03-23 | Mitsubishi Motors Corp | Variable valve timing device |
JPS611833A (ja) * | 1984-06-14 | 1986-01-07 | Nippon Soken Inc | 回転運動伝達装置 |
DE19726300A1 (de) | 1996-06-21 | 1998-01-02 | Denso Corp | Ventileinstellungs-Regelgerät für einen Motor |
EP0915234A2 (de) * | 1997-11-07 | 1999-05-12 | Toyota Jidosha Kabushiki Kaisha | Vorrichtung zur Änderung der Ventilzeitsteuerung einer Brennkraftmaschine |
JPH11173118A (ja) * | 1997-12-12 | 1999-06-29 | Toyota Motor Corp | 内燃機関の可変バルブタイミング機構 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3930157A1 (de) * | 1989-09-09 | 1991-03-21 | Bosch Gmbh Robert | Einrichtung zur verstellung der drehwinkelzuordnung einer nockenwelle zu ihrem antriebselement |
US5829398A (en) * | 1995-11-09 | 1998-11-03 | Ina Walzlager Schaeffler Kg | Valve timing control device for gas exchange valves on an internal combustion engine |
US5836277A (en) * | 1996-12-24 | 1998-11-17 | Aisin Seiki Kabushiki Kaisha | Valve timing control device |
DE19854891C2 (de) * | 1997-11-28 | 2003-02-06 | Aisin Seiki | Ventilzeitsteuervorrichtung |
DE19961193B4 (de) * | 1999-12-18 | 2009-06-10 | Schaeffler Kg | Rotationskolbenversteller |
US6439184B1 (en) * | 2001-01-31 | 2002-08-27 | Denso Corporation | Valve timing adjusting system of internal combustion engine |
-
1999
- 1999-12-18 DE DE19961192A patent/DE19961192A1/de not_active Withdrawn
-
2000
- 2000-11-30 WO PCT/EP2000/011990 patent/WO2001044628A1/de active Application Filing
- 2000-11-30 DE DE10083949T patent/DE10083949B4/de not_active Expired - Fee Related
- 2000-11-30 US US10/168,366 patent/US6769386B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237616A (en) * | 1975-09-19 | 1977-03-23 | Mitsubishi Motors Corp | Variable valve timing device |
JPS611833A (ja) * | 1984-06-14 | 1986-01-07 | Nippon Soken Inc | 回転運動伝達装置 |
DE19726300A1 (de) | 1996-06-21 | 1998-01-02 | Denso Corp | Ventileinstellungs-Regelgerät für einen Motor |
EP0915234A2 (de) * | 1997-11-07 | 1999-05-12 | Toyota Jidosha Kabushiki Kaisha | Vorrichtung zur Änderung der Ventilzeitsteuerung einer Brennkraftmaschine |
JPH11173118A (ja) * | 1997-12-12 | 1999-06-29 | Toyota Motor Corp | 内燃機関の可変バルブタイミング機構 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 001, no. 096 (M - 033) 30 August 1977 (1977-08-30) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 146 (M - 482) 28 May 1986 (1986-05-28) * |
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11 30 September 1999 (1999-09-30) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7165521B2 (en) * | 2002-12-24 | 2007-01-23 | Aisin Seiki Kabushiki Kaisha | Variable valve timing control device |
CN100414076C (zh) * | 2003-07-22 | 2008-08-27 | 爱信精机株式会社 | 可变阀门定时控制装置 |
WO2007071528A1 (de) * | 2005-12-20 | 2007-06-28 | Schaeffler Kg | Nockenwellenversteller mit einer verriegelungseinrichtung |
US7934479B2 (en) | 2005-12-20 | 2011-05-03 | Schaeffler Technologies Gmbh & Co. Kg | Camshaft adjuster comprising a locking mechanism |
KR101336467B1 (ko) | 2005-12-20 | 2013-12-04 | 섀플러 테크놀로지스 아게 운트 코. 카게 | 록킹 기구를 구비한 캠축 조정기 |
WO2015158345A3 (de) * | 2014-04-17 | 2015-12-30 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
US10267186B2 (en) | 2014-04-17 | 2019-04-23 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster |
Also Published As
Publication number | Publication date |
---|---|
US6769386B2 (en) | 2004-08-03 |
US20040020455A1 (en) | 2004-02-05 |
DE19961192A1 (de) | 2001-06-28 |
DE10083949D2 (de) | 2004-05-06 |
DE10083949B4 (de) | 2009-03-19 |
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