EP2577004A1 - Hydraulisch betätigte nockenwellenverstellvorrichtung - Google Patents
Hydraulisch betätigte nockenwellenverstellvorrichtungInfo
- Publication number
- EP2577004A1 EP2577004A1 EP11722767.8A EP11722767A EP2577004A1 EP 2577004 A1 EP2577004 A1 EP 2577004A1 EP 11722767 A EP11722767 A EP 11722767A EP 2577004 A1 EP2577004 A1 EP 2577004A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- supply line
- valve
- adjusting device
- oil
- 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
- 239000003921 oil Substances 0.000 claims abstract description 81
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 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 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
-
- 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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid accumulators for the feeding circuit
Definitions
- the invention relates to a hydraulically operated camshaft adjusting device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine, wherein the camshaft adjusting device has at least two hydraulic chambers arranged between a stator and a rotor and separated by a wing. Control arrangement are supplied from a pressure oil source with pressurized oil.
- Camshaft phasing devices particularly those that operate hydraulically, are well known in the art.
- the hydraulic camshaft adjuster has an impeller in which vanes are molded or arranged.
- the wings are located in hydraulic chambers, which are incorporated in an outer rotor (usually referred to as a stator).
- an adjustment of the inner rotor (connected to the camshaft) relative to the stator can take place between an "early stop” and a "late stop”.
- a generic hydraulically operated camshaft adjusting device is described in DE 10 2006 012 733 A1.
- By means of a hydraulic oil control arrangement is here from a pressure oil source from the adjustment with Supplied pressure oil.
- the control of the flow of hydraulic oil is effected by a valve element, which is designed in particular as a 4/3-way proportional valve. Depending on the position of the proportional valve, a control edge is opened in the inlet and the respective displacement chamber (hydraulic chamber) supplied with pressure oil. Due to the design of the valve opens a second control edge, which thus releases the flow of oil from the other displacement chamber (hydraulic chamber) to the tank.
- the present invention is based on the invention to further develop a camshaft adjuster such that increased adjustment speeds of the camshaft adjuster are possible with the same pressure oil supply or with the same adjustment speed with a reduced pressure oil supply. Furthermore, an increased system rigidity is desired, so that smaller amplitudes of the adjustment angle are possible. In particular, the formation of vacuum-induced gas bubbles in the hydraulic oil should be prevented. In this way, and due to the higher system rigidity, the oscillation amplitudes should be reduced in the event of vibrations occurring. Thus, the mechanical stress of the components of the camshaft adjuster is reduced and the system behavior can be improved. Summary of the invention
- the hydraulic oil control arrangement of the camshaft adjuster comprises: a first supply line, which is arranged between the pressure oil source and a first hydraulic chamber, wherein in the first supply line, a check valve is arranged, which Flow of hydraulic oil from the source of pressurized oil into the hydraulic the first supply line is free of further switchable valve elements and wherein the first supply line is the only supply line for hydraulic oil from the pressure oil source in the hydraulic chamber, a second supply line which is arranged between the pressure oil source and a second hydraulic chamber wherein in the second supply line, a check valve is arranged, which allows the flow of hydraulic oil from the pressure oil source into the hydraulic chamber and prevents in the opposite direction, the second supply line is free of further switchable valve elements and wherein the second supply line, the only supply line for hydraulic oil the pressure oil source is in the hydraulic chamber, a valve element, which is arranged between the hydraulic chambers and a tank effectively and which has three valve positions, namely a first valve position, in the de r
- the check valves in the first and in the second supply line can be integrated directly into the hydraulic piston.
- An alternative provides that the check valves are arranged outside the hydraulic piston.
- the check valves in the first and in the second supply line may be formed as spring-biased ball check valves, tape check valves or flapper valves.
- the valve element is preferably designed as a central screw. In this case, it is preferably provided that the valve element is arranged with a threaded portion in a threaded bore in the camshaft of the internal combustion engine.
- the invention provides that a modified 4/3-way proportional valve is used, wherein the hitherto given fixed mechanical connection of the control edges on the spool is not given.
- the proposed in comparison with known solutions modification of the hydraulic circuit thus runs on a resolution of the mechanically rigid connection of the (inlet) control edges also.
- the upstream side control edges (from the pressurized oil source P to the hydraulic chamber A and from the pressurized oil source P to the hydraulic chamber B) are not realized via the spool (hydraulic piston) but independently by two check valves (constituting a logic element circuit). Only the connections from the hydraulic chamber A to the tank T and from the hydraulic chamber B to the tank T are changed by the position of the spool.
- the proposed embodiment of a camshaft adjuster allows the operation of the same with increased adjustment speeds at the same pressure oil supply or the same adjustment speed with reduced pressure oil supply. Thus, smaller amplitudes of the adjustment can be achieved by increased system rigidity.
- FIG. 1 shows schematically the structure of a camshaft adjuster for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine
- 2 shows schematically a valve element for the camshaft adjuster according to FIG. 1 according to the prior art
- FIG. 3 shows schematically a valve element for the camshaft adjuster according to the invention
- valve element 4c schematically the valve element with some structural details according to a first embodiment of the invention
- 5 c shows schematically the valve element with some design details according to a second embodiment of the invention
- FIG. 6c schematically shows the valve element with some structural details according to a third embodiment of the invention, Fig. 7a to
- Fig. 7c schematically shows the valve element with some structural details according to a fourth embodiment of the invention.
- a camshaft adjusting device 1 is schematically outlined, with the only indicated camshaft 2 relative to a (not shown) crankshaft of an internal combustion engine in a conventional manner with respect to the relative rotational position can be adjusted.
- the camshaft adjusting device 1 comprises a stator 3 (rotatably connected to the crankshaft of the internal combustion engine) and a rotor 4 (rotatably connected to the camshaft 2), wherein between the stator 3 and rotor 4, a rotational adjustment can take place, to which a hydraulic drive is used.
- This hydraulic drive comprises two hydraulic chambers A and B, which are divided by a wing 5, which is integrally formed on the rotor 4. Accordingly, there is a relative rotational adjustment between the stator 3 and the rotor 4 when pressure oil is supplied or removed via corresponding supply lines 13 and 14, respectively.
- the controlled supply and removal of pressurized oil into the hydraulic chambers A and B is caused by a hydraulic oil control arrangement 6.
- oil is passed from a pressure oil source P in the hydraulic chambers A, B and discharged from the chambers A, B back into a tank T.
- a pump 15 provides via a filter 16, the pressure oil.
- valve element 1 of the hydraulic oil control assembly 6 is a valve element 1 1, which may be formed as a central valve; in this case, the valve element 1 1 sits with a threaded portion 17 in a centrally disposed threaded bore in the camshaft 2. Details on the structure and operation of a camshaft adjuster 1 and in particular of the valve element 11 are described in the aforementioned DE 10 2008 004 591 A1 of the applicant, to which express reference is made.
- FIG. 2 shows a previously known embodiment of the valve element 11.
- the pressure oil passes from the pressure oil source P at a pressure p 0 into the valve element 11 designed as a 4/3-way proportional valve.
- a hydraulic piston 12 is moved by an electromagnetic actuator in the direction of a translational displacement direction y moves and so made the oil control in a known manner. In this way, no oil enters the hydraulic chambers A and B or out of them in a first valve position. In a second position, oil with a volume flow Q A and a pressure p A is conveyed into the chamber A, wherein at the same time oil from the chamber B can flow into the tank T, where the low ambient pressure ⁇ prevails.
- a third position becomes oil conveyed with a volume flow Q B and a pressure p B in the chamber B, wherein at the same time oil from the chamber A can flow into the tank T.
- the control edges of the hydraulic piston 12 are all mechanically coupled or connected. Ie. the inlet and outlet are mechanically connected via the movement of the hydraulic piston 12 (in the direction y).
- the opened valves are marked by solid arrows, the closed valves by dashed arrows.
- the hydraulic oil control arrangement 6 is constructed as follows:
- a check valve 8 is arranged in this first supply line 7. This allows the flow of hydraulic oil from the pressure oil source P in the hydraulic chamber A, in the opposite direction, however, no oil can flow.
- the first supply line 7 is free of further switchable valve elements. Also, the first supply line 7 is the only supply line with which oil can pass from the pressure oil source P into the hydraulic chamber A. Oil flows when the pressure of the pressure oil source P is higher than the pressure in the chamber A.
- a second supply line 9 is provided in an analogous manner, which is arranged between the pressure oil source P and a hydraulic chamber B.
- a check valve 10 In the second supply line 9 is a check valve 10. Again, therefore, hydraulic oil can indeed flow from the pressure oil source P in the hydraulic chamber B, but not in the opposite direction.
- the second supply line 9 is free of further switchable valve elements; the line 9 is also the only supply line for oil from the pressure oil source P in the hydraulic chamber. Oil flows when the pressure of the pressure oil source P is higher than the pressure in the chamber B.
- the opened valve is exemplarily marked with a solid arrow in Fig. 3, the closed valve with a dashed arrow.
- the supply control is thus effected via a hydraulic logic circuit, which form the two check valves 8 and 10.
- the inlet and outlet are now decoupled from each other; the inlet into the chambers A, B in particular no longer depends on the position of the hydraulic piston 12 (in the direction y).
- the valve element 1 which is arranged between the hydraulic chambers A, B and the tank effectively, may have three valve positions:
- first valve position (I, see Figures 4 to 7)
- second valve position (II, see Figures 4 to 7) hydraulic oil can flow from the first hydraulic chamber A to the tank T; however, the outflow of hydraulic oil from the second hydraulic chamber B to the tank T is interrupted.
- the check valves 8 and 0 are designed as band check valves (an external spiral band in the form of a sheet metal or plastic spring encloses the bore in the hydraulic piston), wherein they are in the Hydraulic piston 12 are integrated.
- the hydraulic piston 12 is located as a translatory in the direction y displaceable element in a valve housing and is axially biased against an electromagnetic actuator by a spring 18. While the fluidic connection between the pressure oil source P via the check valves 8 and 10 to the hydraulic chambers A, B always exists, cause the control edges of the hydraulic piston 12, that in the valve position I of FIG. 4a no oil from the chambers A, B in the tank T can drain.
- valve element 1 1 is schematically outlined, but here instead of the tape check valves spring-loaded ball check valves are used.
- the mode of action is exactly as described in connection with FIG. 4.
- the check valves 8 and 10 are integrated into the hydraulic piston 12.
- Figures 6 and 7 show further alternative embodiments of the proposed valve element 1 1, in which case the check valves 8 and 10 are arranged outside of the hydraulic piston 12.
- Fig. 6 again provides spring biased ball check valves 8, 10
- Fig. 7 uses flap check valves 8, 10.
- the speed of the system is adjusted by means of the resistances in the discharge of the oil from the hydraulic chambers A, B.
- the proposed solution can be used both in the pressure-driven and in the torque-driven range (ie at high camshaft torques).
- the filling of the hydraulic chambers A, B thus takes place independently of the position of the hydraulic piston 12 in the valve housing solely by the pressure conditions between the pressure oil source and the chambers A, B.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010021399A DE102010021399A1 (de) | 2010-05-25 | 2010-05-25 | Hydraulisch betätigte Nockenwellenverstellvorrichtung |
| PCT/EP2011/058190 WO2011147741A1 (de) | 2010-05-25 | 2011-05-19 | Hydraulisch betätigte nockenwellenverstellvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2577004A1 true EP2577004A1 (de) | 2013-04-10 |
| EP2577004B1 EP2577004B1 (de) | 2017-09-06 |
Family
ID=44119146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11722767.8A Not-in-force EP2577004B1 (de) | 2010-05-25 | 2011-05-19 | Hydraulisch betätigte nockenwellenverstellvorrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8733308B2 (de) |
| EP (1) | EP2577004B1 (de) |
| CN (1) | CN102918234B (de) |
| DE (1) | DE102010021399A1 (de) |
| WO (1) | WO2011147741A1 (de) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012211526A1 (de) | 2012-07-03 | 2014-01-09 | Schaeffler Technologies AG & Co. KG | Hydraulischer Nockenwellenversteller mit interner Dämpfung |
| DE102012212857A1 (de) | 2012-07-23 | 2014-01-23 | Schaeffler Technologies AG & Co. KG | Hydraulischer Nockenwellenversteller mit drehzahlabhängiger Druckübersetzung |
| CN102926831A (zh) * | 2012-10-30 | 2013-02-13 | 芜湖杰锋汽车动力系统有限公司 | 一种配气调节装置 |
| DE102013104051B4 (de) * | 2013-04-22 | 2016-09-22 | Hilite Germany Gmbh | Zentralventil für einen Schwenkmotorversteller |
| DE102013104031B4 (de) * | 2013-04-22 | 2017-10-05 | Hilite Germany Gmbh | Zentralventil für einen Schwenkmotorversteller |
| DE102013207615B4 (de) * | 2013-04-26 | 2021-05-12 | Schaeffler Technologies AG & Co. KG | Nockenwellenverstelleinrichtung mit einer Mittenverriegelung |
| US9816626B1 (en) | 2014-07-15 | 2017-11-14 | Davis & Davis Company | Method and device for adapting an actuator to a valve |
| US9587526B2 (en) | 2014-07-25 | 2017-03-07 | Delphi Technologies, Inc. | Camshaft phaser |
| US9587527B2 (en) | 2014-11-04 | 2017-03-07 | Delphi Technologies, Inc. | Camshaft phaser |
| EP3032054B1 (de) * | 2014-12-10 | 2017-03-29 | C.R.F. Società Consortile per Azioni | Brennkraftmaschine mit elektronisch gesteuertem hydrauliksystem zur variablen betätigung von einlassventilen, mit einer vorrichtung zum auffüllen des systems mit fluid |
| US9976450B2 (en) | 2015-11-10 | 2018-05-22 | Delphi Technologies Ip Limited | Camshaft phaser |
| US10082054B2 (en) | 2015-11-10 | 2018-09-25 | Delphi Technologies Ip Limited | Camshaft phaser |
| DE102016104110A1 (de) * | 2016-03-07 | 2017-09-07 | Hilite Germany Gmbh | Schwenkmotorverstelleranordnung mit einer Zentrierungsvorrichtung |
| DE102016104561A1 (de) * | 2016-03-14 | 2017-09-14 | Hilite Germany Gmbh | Hydraulikventil für einen Schwenkmotorversteller einer Nockenwelle |
| EP3267012B1 (de) * | 2016-07-08 | 2019-09-18 | ECO Holding 1 GmbH | Rückschlagventil für einen pleuel für eine brennkraftmaschine mit variabler verdichtung |
| DE102017106987A1 (de) | 2016-07-08 | 2018-01-11 | ECO Holding 1 GmbH | Rückschlagventil für ein Pleuel für eine Brennkraftmaschine mit variabler Verdichtung |
| DE102017107694A1 (de) * | 2016-08-16 | 2018-02-22 | ECO Holding 1 GmbH | Umschaltventil und Pleuel mit einem derartigen Umschaltventil |
| EP3284927B1 (de) * | 2016-08-16 | 2019-04-10 | ECO Holding 1 GmbH | Pleuel mit einem umschaltventil |
| DE102017121236A1 (de) | 2017-05-04 | 2018-11-08 | ECO Holding 1 GmbH | Hydraulikmodul mit einem Umschaltventil zum Steuern eines Hydraulikflüssigkeitsstroms eines Pleuels für eine Brennkraftmaschine mit variabler Verdichtung sowie Pleuel |
| CN111140306B (zh) * | 2018-11-05 | 2023-07-14 | 博格华纳公司 | 用于从可变凸轮正时相位器排出流体流的止回阀 |
| CN112065527B (zh) * | 2020-09-11 | 2021-11-19 | 潍柴动力股份有限公司 | 一种控制油路结构、摇臂轴组件及发动机总成 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2217812A (en) * | 1988-04-30 | 1989-11-01 | Ford Motor Co | Variable camshaft phasing mechanism |
| DE4210580C2 (de) | 1992-03-31 | 2001-06-28 | Bosch Gmbh Robert | Vorrichtung zur Winkelverstellung der Nockenwelle einer Brennkraftmaschine |
| DE4216791A1 (de) * | 1992-05-21 | 1993-11-25 | Teves Gmbh Alfred | Variable Nockenwellenverstellung mit proportionalem Lageregler |
| DE19756017A1 (de) * | 1997-12-17 | 1999-06-24 | Porsche Ag | Einrichtung zur relativen Drehlagenänderung einer Welle zum Antriebsrad |
| DE19756016A1 (de) * | 1997-12-17 | 1999-06-24 | Porsche Ag | Vorrichtung zur hydraulischen Drehwinkelverstellung einer Welle zu einem Antriebsrad |
| US6382148B1 (en) * | 1999-06-10 | 2002-05-07 | Unisia Jecs Corporation | Oil pressure control apparatus for an internal combustion engine |
| DE102006012733B4 (de) | 2006-03-17 | 2008-03-27 | Hydraulik-Ring Gmbh | Fast cam phaser-Hydraulikkreis, insbesondere für Nockenwellenversteller, und entsprechendes Steuerelement |
| DE102008004591A1 (de) | 2008-01-16 | 2009-07-23 | Schaeffler Kg | Hydraulisches Steuerventil mit integriertem Rückschlagventil |
-
2010
- 2010-05-25 DE DE102010021399A patent/DE102010021399A1/de not_active Withdrawn
-
2011
- 2011-05-19 CN CN201180025737.3A patent/CN102918234B/zh not_active Expired - Fee Related
- 2011-05-19 EP EP11722767.8A patent/EP2577004B1/de not_active Not-in-force
- 2011-05-19 US US13/640,502 patent/US8733308B2/en active Active
- 2011-05-19 WO PCT/EP2011/058190 patent/WO2011147741A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2011147741A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130025552A1 (en) | 2013-01-31 |
| CN102918234B (zh) | 2015-04-01 |
| WO2011147741A1 (de) | 2011-12-01 |
| US8733308B2 (en) | 2014-05-27 |
| EP2577004B1 (de) | 2017-09-06 |
| CN102918234A (zh) | 2013-02-06 |
| DE102010021399A1 (de) | 2011-12-01 |
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