US20130220248A1 - Camshaft adjuster - Google Patents
Camshaft adjuster Download PDFInfo
- Publication number
- US20130220248A1 US20130220248A1 US13/772,418 US201313772418A US2013220248A1 US 20130220248 A1 US20130220248 A1 US 20130220248A1 US 201313772418 A US201313772418 A US 201313772418A US 2013220248 A1 US2013220248 A1 US 2013220248A1
- Authority
- US
- United States
- Prior art keywords
- driven element
- control valve
- camshaft adjuster
- camshaft
- hydraulic medium
- 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.)
- Abandoned
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000009415 formwork Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
-
- 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
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34426—Oil control valves
- F01L2001/34433—Location oil control valves
Definitions
- the invention relates to a camshaft adjuster.
- Camshaft adjusters are used in internal combustion engines for varying the control times of the combustion chamber valves, in order to be able to variably shape the phase relation between a crankshaft and a camshaft in a defined angular range between a maximum advanced position and a maximum retarded position.
- the adaptation of the control times to the current load and rotational speed reduces consumption and emissions.
- camshaft adjusters are integrated in a drive train by means of which a torque is transferred from the crankshaft to the camshaft.
- This drive train can be constructed, for example, as a belt drive, chain drive, or gearwheel drive.
- the driven element and the drive element form one or more pairs of pressure chambers that act against each other and can be pressurized with hydraulic medium.
- the drive element and the driven element are arranged coaxially. By filling and emptying individual pressure chambers, a relative movement is generated between the drive element and the driven element.
- the vane cell adjuster has a drive element formed as a stator, a driven element formed as a rotor, and a drive wheel with external teeth.
- the driven element is usually formed so that it can be locked in rotation with the camshaft.
- the drive element contains the stator and the drive wheel.
- the drive element and the drive wheel are locked in rotation with each other or are alternatively constructed as a single piece.
- the driven element is arranged coaxial to the drive element and within the drive element.
- the driven element and the drive element form oil chambers that act in opposite directions with their vanes extending in the radial direction and these chambers can be pressurized by oil pressure and allow a relative rotation between the drive element and the driven element.
- the vanes are constructed either integrally with the driven element or the drive element or are arranged as “inserted vanes” in grooves of the driven element or drive element provided for this purpose.
- the vane cell adjusters further have various sealing covers. The drive element and the sealing covers are secured with each other by several screw connections.
- Another type of hydraulic camshaft adjuster is the axial piston adjuster.
- a displacement element that generates a relative rotation between a drive element and a driven element using helical gearing is shifted in the axial direction by oil pressure.
- DE 10 2004 026 863 A1 discloses a camshaft adjuster with a drive element and a driven element.
- the camshaft is connected to the driven element by means of a non-positive, positive, or material fit connection.
- a camshaft adjuster in which a connection element is provided in the driven part.
- the connection element is fixed in the driven part by means of a positive-fit connection.
- the connection element is further attached to a camshaft.
- the connection element has recesses that are used for the oil supply.
- the oil supply is controlled by means of a hydraulic valve that is provided in the connection element.
- a camshaft adjuster with a drive element and a driven element is disclosed in DE 103 34 690 B4.
- a peg is formed integrally from the driven element. The peg is used for connecting to the camshaft.
- Several oil supply channels are further arranged in the driven element.
- DE 10 2009 052 841 A1 discloses a camshaft adjuster in which a camshaft insert is used for attaching the rotor to the camshaft.
- the camshaft insert is locked in rotation with the rotor by means of a nut.
- a longitudinal bore that holds a central valve is provided in the camshaft insert.
- the objective of the present invention is to provide a camshaft adjuster that can be produced economically.
- a camshaft adjuster for an internal combustion engine with a cylinder head, with a drive element and a driven element, wherein the drive element and the driven element can be rotated relative to each other about a common axis and wherein the drive element and the driven element form work chambers acting opposite each other, wherein the work chambers can be pressurized with hydraulic medium, in order to achieve a relative rotation between the drive element and the driven element, and wherein a control valve is arranged in the driven element, wherein the control valve has a valve housing and a control piston that is arranged in the valve housing and is used for controlling the hydraulic medium, and wherein the control valve is arranged coaxial to the common axis, wherein a one-piece radial bearing point constructed by the driven element is provided for support on the cylinder head outside of the axial area of the work chambers.
- control valve is fixed in the axial direction in the driven element by a non-positive fit connection.
- a non-positive fit connection the parts are held in their mutual position by an external force, for example, a friction force.
- the non-positive fit connection can be, for example, a ring that is joined to the driven element by a longitudinal or transverse interference fit.
- control valve is fixed in the axial direction in the driven element by a positive fit connection.
- a positive-fit connection the force is transmitted through the shape of the parts involved in the connection.
- a positive-fit connection must be produced between two active contacting surfaces.
- the positive-fit connection can be, for example, a retaining ring or an expansion ring.
- the driven element has an anti-rotation device for the control valve, so that an installation position defined in the peripheral direction is specified.
- the anti-rotation device is required so that the control valve and the driven element cannot rotate relative to each other when the camshaft adjuster is activated.
- the anti-rotation device can be, for example, an axial groove, notch, recess, or the like in the driven element.
- the anti-rotation device in the driven part is advantageously produced by pressing, sintering, or calibrating methods, wherein the high costs due to milling can be avoided.
- the control valve engages in the anti-rotation device of the driven element. To allow this, projecting flaps, tabs, or other raised section are provided on the control valve.
- the valve housing is formed integrally with the driven element, wherein the driven element forms a guide surface for guiding the control piston of the control valve.
- the valve housing can be formed, for example, by a bore in the driven element, wherein the bore forming the valve housing is here arranged coaxial to the axis about which the drive element and the driven element can rotate relative to each other.
- the bore can be constructed as a through hole or as a blind hole.
- the other components of the control valve such as the control piston and a compression spring, can be inserted as “insert pieces” into this bore.
- the control piston By integrating the valve housing in the driven element, the control piston is consequently guided by the driven element. In the axial direction, the control piston can move in the driven element and thus can be positioned in any axial position relative to the driven element. This has the advantage that the material and production costs that occur for a control valve with a separate valve housing can be reduced, just like the assembly costs. Another advantage of the invention is that the control piston can be used without tension and deformation in the driven element.
- the hydraulic medium can be fed into the control valve by hydraulic medium channels formed in the camshaft.
- a supply of the hydraulic medium into the control valve can be provided in the axial or radial direction in the radial bearing position.
- hydraulic medium channels are provided in the camshaft or also in the radial bearing position according to the embodiment.
- the driven element has other hydraulic medium channels that interact with openings of the control valve. These hydraulic medium channels can run in the driven element in the radial or also in the axial direction to the work chambers and through openings, such as bores or through recesses, such as channels, grooves, or other formations.
- the driven element has a radial projecting peg for attachment to a camshaft.
- the peg can be made, for example, from a solid material or like a kind of sleeve or pipe.
- the peg can be locked in rotation with the camshaft.
- the lateral surface of the peg can be adapted accordingly.
- the lateral surface of the peg can be smooth, roughened, or provided with raised sections.
- the peg is formed integrally with the driven element.
- the peg can be locked in rotation with the driven element by a material fit, positive fit, or non-positive fit connection.
- the driven element has an axial bearing and a part of the axial bearing is formed integrally with the driven element.
- the axial bearing could also be formed separately and connected to the driven element by a non-positive fit, positive fit, or material fit connection.
- the other part of the axial bearing can be formed by the camshaft or the cylinder head.
- FIG. 1 a section view through the camshaft adjuster according to the invention
- FIG. 2 a section view through a driven element of the camshaft adjuster according to the invention
- FIG. 3 a side view of the camshaft adjuster according to the invention.
- FIG. 1 shows a camshaft adjuster 1 with a camshaft 2 that is shown partially and is formed with a tubular shape.
- the camshaft adjuster 1 has a drive element 3 that is formed as a stator 4 and a driven element 5 that is formed as a rotor 6 .
- the stator 4 and the rotor 6 can be rotated about a common axis la relative to each other.
- a drive wheel 4 a is formed integrally on the stator 4 .
- the camshaft adjuster 1 has a cover 7 on which a spring 8 is suspended. The cover 7 is connected to the stator 4 by a screw connection 9 .
- the camshaft adjuster 1 has a first axial bearing point 10 and a second axial bearing point 11 that are formed with a ring shape.
- the first axial bearing point 10 is connected to a section of the rotor.
- the second axial bearing point 11 is provided on the camshaft end 2 a facing the rotor 6 .
- FIG. 2 is also referenced.
- the rotor 6 has a step-shaped structure that forms three rotor areas 6 a, 6 b, 6 c.
- a first rotor area 6 a has vanes 12 .
- the vanes 12 are formed integrally on the rotor 6 .
- the vanes 12 of the rotor 6 form work chambers (not shown) that can be pressurized with hydraulic medium.
- a second rotor area 6 b connects that forms a radial bearing point 13 .
- the radial bearing point 13 is formed integrally on the rotor 6 .
- the radial bearing point is smaller in diameter than the rotor area 6 a that has the vanes 10 .
- the radial bearing point 11 is provided for the support of a cylinder head.
- the rotor 6 has a blind bore 15 coaxial to the axis 1 .
- the blind bore 15 extends in the axial direction along the first rotor area 6 a and the second rotor area 6 b.
- several bores 16 are provided in the blind bore 15 .
- the bores 16 form hydraulic medium channels 17 .
- the hydraulic medium channels 17 extend in the radial direction and are used to provide the not-shown work chambers with hydraulic medium. In the area of the bores 16 there are additional ring channels 18 that guide the hydraulic medium into the hydraulic medium channels 17 .
- the rotor 6 has, in the area of the peg 12 , the bore 19 .
- the bores 19 run in the radial direction and are formed as passage bores.
- the bores 19 are used in the rotor as supply 20 .
- This supply 20 is connected to a not-shown compressed medium pump.
- the hydraulic medium is led in the direction of a control valve 21 a by the supply 22 .
- the blind bore 15 forms a valve housing 21 of the control valve 21 a.
- a control piston 21 b, a not-shown compression spring of the control valve 21 a are inserted as insert parts.
- the valve housing 20 formed by the blind bore 15 forms a guide surface for the not-shown control piston.
- the control piston 21 b can move in the axial direction into the blind bore 15 and interacts with the hydraulic medium channels 17 in the rotor 6 .
- the rotor 6 has an anti-rotation device 22 for the control valve.
- the anti-rotation device 22 is formed as an axial groove 23 in the rotor 6 in which the control valve 21 a can engage.
- the securing of the control valve 21 a in the axial direction can be seen from FIG. 3 .
- the axial securing of the control valve 21 a is realized with a positive-fit connection by a retaining ring 24 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012202823.4A DE102012202823B4 (de) | 2012-02-24 | 2012-02-24 | Nockenwellenversteller |
DE102012202823.4 | 2012-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130220248A1 true US20130220248A1 (en) | 2013-08-29 |
Family
ID=48950737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/772,418 Abandoned US20130220248A1 (en) | 2012-02-24 | 2013-02-21 | Camshaft adjuster |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130220248A1 (de) |
CN (1) | CN103291400A (de) |
DE (1) | DE102012202823B4 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019115086A1 (de) | 2019-06-05 | 2020-12-10 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller mit Kontaktfläche zur Nockenwelle sowie Montageverfahren für Nockenwellenversteller |
DE102019115084A1 (de) * | 2019-06-05 | 2020-12-10 | Schaeffler Technologies AG & Co. KG | Nockenwelle mit Ölkanal, Nockenwellenversteller mit Nockenwelle sowie Montageverfahren für Nockenwellenversteller |
DE102019131779A1 (de) * | 2019-11-25 | 2021-05-27 | Schaeffler Technologies AG & Co. KG | Elektrischer Nockenwellenversteller mit verbesserter Nockenwellenanbindung sowie Verfahren zum Herstellen des Nockenwellenverstellers |
DE102021116598A1 (de) | 2021-06-28 | 2022-12-29 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010010234A1 (en) * | 1999-01-18 | 2001-08-02 | Hillis William L. | Staked dual valve assembly |
US20050045130A1 (en) * | 2003-08-27 | 2005-03-03 | Borgwarner Inc. | Camshaft incorporating variable camshaft timing phaser rotor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6871621B2 (en) * | 2003-05-12 | 2005-03-29 | Hydraulik-Ring Gmbh | Camshaft adjuster for internal combustion engines of motor vehicles |
DE10334690B4 (de) * | 2003-07-30 | 2008-08-21 | Böckmann-Hannibal, Angela, Dipl.-Ing. (FH) | Einrichtung zur Nockenwellenverstellung für Verbrennungskraftmaschinen |
DE10362023A1 (de) * | 2003-12-24 | 2005-07-28 | Ina-Schaeffler Kg | Vorrichtung zur hydraulischen Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine |
DE102006012348A1 (de) * | 2006-03-17 | 2007-09-20 | Daimlerchrysler Ag | Verstelleinrichtung |
DE102006033977A1 (de) * | 2006-07-22 | 2008-01-24 | Dr.Ing.H.C. F. Porsche Ag | Vorrichtung und Verfahren zum Einstellen der Position eines Nockenwellenverstellers relativ zu einer Nockenwelle |
DE102008050134B4 (de) * | 2008-10-04 | 2017-06-29 | Schaeffler Technologies AG & Co. KG | Einrichtung zur Nockenwellenverstellung für eine Verbrennungskraftmaschine |
DE102009052841A1 (de) * | 2009-11-13 | 2011-05-19 | Hydraulik-Ring Gmbh | Nockenwelleneinsatz |
EP2511488B1 (de) * | 2009-12-07 | 2014-05-14 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Variable ventilsteuerung für einen verbrennungsmotor |
-
2012
- 2012-02-24 DE DE102012202823.4A patent/DE102012202823B4/de not_active Expired - Fee Related
-
2013
- 2013-02-21 US US13/772,418 patent/US20130220248A1/en not_active Abandoned
- 2013-02-25 CN CN201310058634.8A patent/CN103291400A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010010234A1 (en) * | 1999-01-18 | 2001-08-02 | Hillis William L. | Staked dual valve assembly |
US20050045130A1 (en) * | 2003-08-27 | 2005-03-03 | Borgwarner Inc. | Camshaft incorporating variable camshaft timing phaser rotor |
Also Published As
Publication number | Publication date |
---|---|
CN103291400A (zh) | 2013-09-11 |
DE102012202823A1 (de) | 2013-08-29 |
DE102012202823B4 (de) | 2014-03-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8534246B2 (en) | Camshaft phaser with independent phasing and lock pin control | |
US8375906B2 (en) | Camshaft phaser for a concentric camshaft | |
JP5759654B2 (ja) | 油圧バルブ | |
US8967105B2 (en) | Central valve for a camshaft adjuster | |
US8122863B2 (en) | Camshaft phaser for the inner camshaft of a concentric camshaft assembly | |
US20050252561A1 (en) | Control valve for a device for changing the control times of an internal combust ion engine | |
US8336512B2 (en) | Camshaft phaser for a concentric camshaft | |
US9032924B2 (en) | Camshaft adjuster | |
US7305948B2 (en) | Device for changing the timing of an internal-combustion engine | |
US8689746B2 (en) | Device for the variable adjustment of valve lift curves of gas exchange valves of an internal combustion engine | |
US9267399B2 (en) | Control valve of a camshaft adjuster | |
US20130220248A1 (en) | Camshaft adjuster | |
US20130199467A1 (en) | Camshaft adjuster | |
US8800514B2 (en) | Camshaft adjuster | |
US20150144211A1 (en) | Control valve of a camshaft adjuster | |
US8776744B2 (en) | Camshaft adjusting assembly | |
US8857393B2 (en) | Camshaft adjuster | |
US20140144283A1 (en) | Camshaft adjuster | |
US20130228143A1 (en) | Filter arrangement of a control valve for a camshaft adjuster | |
CN108350768B (zh) | 凸轮轴调节设备 | |
US9260984B2 (en) | Camshaft adjuster | |
US8662041B2 (en) | Device for variable adjustment of the control times of gas exchange valves of an internal combustion engine | |
US9562445B2 (en) | Camshaft phaser | |
CN102971498A (zh) | 用于改变内燃机的凸轮轴相对于曲轴的相对角位置的装置 | |
US20150354416A1 (en) | Camshaft adjuster |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WEBER, JURGEN;REEL/FRAME:029846/0703 Effective date: 20130116 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |