DE102008002461A1 - Device for changing the rotational angle position of a camshaft - Google Patents
Device for changing the rotational angle position of a camshaft Download PDFInfo
- Publication number
- DE102008002461A1 DE102008002461A1 DE200810002461 DE102008002461A DE102008002461A1 DE 102008002461 A1 DE102008002461 A1 DE 102008002461A1 DE 200810002461 DE200810002461 DE 200810002461 DE 102008002461 A DE102008002461 A DE 102008002461A DE 102008002461 A1 DE102008002461 A1 DE 102008002461A1
- Authority
- DE
- Germany
- Prior art keywords
- phaser
- connection
- valve
- camshaft
- valves
- 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.)
- Withdrawn
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
-
- 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
- F01L1/34409—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 by torque-responsive means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Es sind schon Vorrichtungen zum Verändern der Drehwinkellage einer Nockenwelle relativ zu einer Kurbelwelle bekannt, mit einem hydraulischen Phasensteller, einem den hydraulischen Phasensteller mit Fluid versorgenden Förderaggregat und mit einem den hydraulischen Phasensteller steuernden 4/3-Steuerventil, das als Proportional-Stromventil ausgeführt ist und die Ölmenge über den Hub des Ventils und die Öffnungsdauer dosiert. Nachteilig ist, dass der Phasensteller ausschließlich mittels eines von einem Förderaggregat erzeugten Drucks verstellbar ist. Bei der erfindungsgemäßen Vorrichtung ist der Phasensteller sowohl über einen von dem Förderaggregat erzeugten hydraulischen Druck als auch von den Wechselmomenten der Nockenwelle verstellbar. Erfindungsgemäß ist vorgesehen, dass zwei 3/2-Schaltventile (7, 8) zur Steuerung des Phasenstellers (4) vorgesehen sind.There are already known devices for changing the rotational angle position of a camshaft relative to a crankshaft, with a hydraulic phaser, the hydraulic phaser supplying the fluid delivery unit and with a hydraulic phaser controlling 4/3-control valve, which is designed as a proportional flow control valve and the quantity of oil is metered via the stroke of the valve and the opening duration. The disadvantage is that the phase adjuster is adjustable exclusively by means of a pressure generated by a delivery unit. In the apparatus according to the invention, the phaser is adjustable both via a hydraulic pressure generated by the delivery unit and by the alternating torques of the camshaft. According to the invention it is provided that two 3/2-switching valves (7, 8) are provided for controlling the phaser (4).
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zum Verändern der Drehwinkellage einer Nockenwelle nach der Gattung des Hauptanspruchs.The The invention is based on a device for changing the angular position of a camshaft according to the preamble of the main claim.
Es
ist schon eine Vorrichtung zum Verändern der Drehwinkellage
einer Nockenwelle relativ zu einer Kurbelwelle aus der
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, dass der Phasensteller sowohl über einen von dem Förderaggregat erzeugten hydraulischen Druck als auch von den Wechselmomenten der Nockenwelle verstellbar ist, indem anstatt eines 4/3-Proportionalventils zwei schnell schaltbare 3/2-Schalt- bzw. Wegeventile zur Steuerung des Phasenstellers vorgesehen sind. Die Verstellung mittels der Nockenwellen-Wechselmomente wird auch als CTA (Cam Torque Actuation) und die Verstellung mittels des Förderaggregates als OPA (Oil Pressure Actuation) bezeichnet. Aus dem Motorbetrieb resultierende variable Nockenwellendrehzahlen und damit Nockenwellenwechselmomente auf der einen und der Wunsch nach variablen Verstellgeschwindigkeiten auf der anderen Seite zwingen zu hoher Flexibilität bezüglich der Schaltfrequenzen und Einschaltdauer der Schaltventile. Da die 3/2-Schaltventile mit hoher Frequenz verstellbar sind, wird die erfindungsgemäße Vorrichtung auch als pulsweitenmodulierendes Hydrauliksystem bezeichnet.The inventive device with the characterizing Features of the main claim has the advantage over that the phaser both over one of the delivery unit generated hydraulic pressure as well as the alternating moments of the Camshaft is adjustable by replacing a 4/3-proportional valve Two fast-switching 3/2 directional control valves for control the phaser are provided. The adjustment by means of Camshaft alternating moments is also called CTA (Cam Torque Actuation) and the adjustment by means of the delivery unit as OPA (Oil Pressure Actuation). Resulting from engine operation variable camshaft speeds and thus camshaft alternating torques on the one hand and the desire for variable adjustment speeds on the other hand force too much flexibility in terms the switching frequencies and duty cycle of the switching valves. Since the 3/2 switching valves are adjustable with high frequency, the inventive Device also referred to as pulse width modulating hydraulic system.
Durch die erfindungsgemäße Ausführung werden die Herstellungskosten verringert, da die 3/2-Schaltventile kostengünstiger sind als ein 4/3-Proportionalventil. Außerdem wird Bauraum eingespart. Des weiteren benötigen die 3/2-Schaltventile nur Strom für das Halten der einen Schaltstellung. Bei den 3/2-Schaltventilen treten keine Hystereseeffekte auf, so dass die Regelabweichung und die Schwingungsanfälligkeit geringer ist als im Stand der Technik.By be the embodiment of the invention the manufacturing costs are reduced because the 3/2-way valves cost less are considered a 4/3 proportional valve. In addition, space is saved. Furthermore, require the 3/2-way valves only current for holding the one switching position. at The 3/2-way valves have no hysteresis effects, so that the deviation and susceptibility to vibration lower is as in the prior art.
Bei einer CTA-Verstellung des Phasenstellers wird Motoröl zwischen den Arbeitskammern des Phasenstellers über die beiden 3/2-Schaltventile ausgetauscht, wobei kein von dem Förderaggregat gefördertes Motoröl benötigt wird, so dass die Motorölpumpe kleiner ausgelegt werden kann. Dies läßt sich besonders einfach bei geringen Motordrehzahlen realisieren. Gerade für diesen Betriebsbereich muss die Motorölpumpe dimensioniert werden, so dass diese kleiner ausgelegt werden kann. Bei hohen Drehzahlen fördert die Motorölpumpe hingegen genügend Öl, so dass der Nockenwellensteller einfacher im OPA-Modus betrieben wird. Durch die erfindungsgemäße Ausführung sind vorteilhaft beide Betriebsmodi – drehzahlabhängig – anwendbar, ein Umschalten zwischen den Betriebsmodi erfolgt durch die Auslegung der Ein- und Ausschaltzeitpunkte der Schaltventile.at a CTA adjustment of the phaser engine oil between replaced the working chambers of the phaser via the two 3/2-way valves, where no promoted by the delivery unit Engine oil is needed, so the engine oil pump can be designed smaller. This can be especially easy to realize at low engine speeds. Just For this operating range, the engine oil pump must be dimensioned so that it can be designed smaller. At high speeds, the engine oil pump promotes However, enough oil, so the camshaft actuator easier to operate in OPA mode. By the invention Execution are advantageous both operating modes - speed dependent - applicable, switching between the operating modes is done by the design the on and off times of the switching valves.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung möglich.By the measures listed in the dependent claims are advantageous developments and improvements in the main claim specified device possible.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.One Embodiment of the invention is in the drawing shown simplified and in the following description in more detail explained.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die Zeichnung zeigt schematisch eine erfindungsgemäße Vorrichtung.The Drawing shows schematically an inventive Contraption.
Die
Vorrichtung
Die
Drehwinkellage bzw. der Phasenwinkel wird auf bekannte Art und Weise
verstellt, indem die Rotorflügel
Erfindungsgemäß ist
vorgesehen, dass zwei 3/2-Schaltventile
Der
Phasensteller
Einer
der Anschlüsse
Jedes
der 3/2-Schaltventile
Für
eine OPA-Verstellung des Rotors
Für
eine CTA-Verstellung des Rotors
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10020119 A1 [0002] - DE 10020119 A1 [0002]
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810002461 DE102008002461A1 (en) | 2008-06-17 | 2008-06-17 | Device for changing the rotational angle position of a camshaft |
PCT/EP2008/067903 WO2009152880A1 (en) | 2008-06-17 | 2008-12-18 | Device for changing the angle of rotation position of a camshaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810002461 DE102008002461A1 (en) | 2008-06-17 | 2008-06-17 | Device for changing the rotational angle position of a camshaft |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008002461A1 true DE102008002461A1 (en) | 2009-12-24 |
Family
ID=40430071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810002461 Withdrawn DE102008002461A1 (en) | 2008-06-17 | 2008-06-17 | Device for changing the rotational angle position of a camshaft |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102008002461A1 (en) |
WO (1) | WO2009152880A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202011002859U1 (en) | 2011-02-09 | 2011-04-21 | Link, Tobias | Ablängmesseinrichtung |
WO2011064231A1 (en) * | 2009-11-27 | 2011-06-03 | Schaeffler Technologies Gmbh & Co. Kg | Device for variably adjusting the control times of gas exchange valves of an internal combustion engine |
EP2778355A1 (en) * | 2013-03-11 | 2014-09-17 | Husco Automotive Holdings LLC | System for varying cylinder valve timing in an internal combustion engine |
CN106368759A (en) * | 2015-07-24 | 2017-02-01 | 胡斯可汽车控股有限公司 | System for varying cylinder valve timing in an internal combustion engine |
CN108368769A (en) * | 2015-08-20 | 2018-08-03 | 哈金森公司 | Cooling circuit on vehicle and method |
US10619524B2 (en) | 2016-06-08 | 2020-04-14 | Scania Cv Ab | Variable cam timing phaser utilizing hydraulic logic element |
US10731520B2 (en) | 2016-06-08 | 2020-08-04 | Scania Cv Ab | Variable cam timing phaser utilizing series-coupled check valves |
US10844755B2 (en) | 2016-06-08 | 2020-11-24 | Scania Cv Ab | Rotational hydraulic logic device and variable cam timing phaser utilizing such a device |
US10927719B2 (en) | 2016-05-24 | 2021-02-23 | Scania Cv Ab | Variable cam timing phaser having two central control valves |
US11105227B2 (en) | 2016-05-24 | 2021-08-31 | Scania Cv Ab | High frequency switching variable cam timing phaser |
DE102016210177B4 (en) | 2015-07-08 | 2022-03-31 | Ford Global Technologies, Llc | Variable camshaft timing device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9797276B2 (en) | 2013-03-11 | 2017-10-24 | Husco Automotive Holdings Llc | System for varying cylinder valve timing in an internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10020119A1 (en) | 2000-04-22 | 2001-10-25 | Schaeffler Waelzlager Ohg | Device for independent hydraulic adjustment of camshaft phase and axial positions has phase adjuster in form of rotation piston adjuster that also forms adjustment piston for camshaft |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2570766Y2 (en) * | 1991-08-23 | 1998-05-13 | 株式会社ユニシアジェックス | Valve timing control device for internal combustion engine |
JP2842113B2 (en) * | 1992-12-18 | 1998-12-24 | トヨタ自動車株式会社 | Variable valve timing control device |
DE4324987A1 (en) * | 1993-07-26 | 1995-02-02 | Teves Gmbh Alfred | Device for the hydraulic adjustment of a camshaft |
DE19837693A1 (en) * | 1997-08-21 | 1999-02-25 | Schaeffler Waelzlager Ohg | Timing control for IC engine |
US6263846B1 (en) * | 1999-12-28 | 2001-07-24 | Borgwarner Inc. | Control valve strategy for vane-type variable camshaft timing system |
US6453859B1 (en) * | 2001-01-08 | 2002-09-24 | Borgwarner Inc. | Multi-mode control system for variable camshaft timing devices |
-
2008
- 2008-06-17 DE DE200810002461 patent/DE102008002461A1/en not_active Withdrawn
- 2008-12-18 WO PCT/EP2008/067903 patent/WO2009152880A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10020119A1 (en) | 2000-04-22 | 2001-10-25 | Schaeffler Waelzlager Ohg | Device for independent hydraulic adjustment of camshaft phase and axial positions has phase adjuster in form of rotation piston adjuster that also forms adjustment piston for camshaft |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011064231A1 (en) * | 2009-11-27 | 2011-06-03 | Schaeffler Technologies Gmbh & Co. Kg | Device for variably adjusting the control times of gas exchange valves of an internal combustion engine |
US8584638B2 (en) | 2009-11-27 | 2013-11-19 | Schaeffler Technologies AG & Co. KG | Device for variably adjusting the control times of gas exchange valves of an internal combustion engine |
DE202011002859U1 (en) | 2011-02-09 | 2011-04-21 | Link, Tobias | Ablängmesseinrichtung |
EP2778355A1 (en) * | 2013-03-11 | 2014-09-17 | Husco Automotive Holdings LLC | System for varying cylinder valve timing in an internal combustion engine |
DE102016210177B4 (en) | 2015-07-08 | 2022-03-31 | Ford Global Technologies, Llc | Variable camshaft timing device |
CN106368759A (en) * | 2015-07-24 | 2017-02-01 | 胡斯可汽车控股有限公司 | System for varying cylinder valve timing in an internal combustion engine |
CN106368759B (en) * | 2015-07-24 | 2020-08-04 | 胡斯可汽车控股有限公司 | System for varying cylinder valve timing in an internal combustion engine |
CN108368769A (en) * | 2015-08-20 | 2018-08-03 | 哈金森公司 | Cooling circuit on vehicle and method |
US10927719B2 (en) | 2016-05-24 | 2021-02-23 | Scania Cv Ab | Variable cam timing phaser having two central control valves |
US11105227B2 (en) | 2016-05-24 | 2021-08-31 | Scania Cv Ab | High frequency switching variable cam timing phaser |
US10619524B2 (en) | 2016-06-08 | 2020-04-14 | Scania Cv Ab | Variable cam timing phaser utilizing hydraulic logic element |
US10844755B2 (en) | 2016-06-08 | 2020-11-24 | Scania Cv Ab | Rotational hydraulic logic device and variable cam timing phaser utilizing such a device |
US10731520B2 (en) | 2016-06-08 | 2020-08-04 | Scania Cv Ab | Variable cam timing phaser utilizing series-coupled check valves |
Also Published As
Publication number | Publication date |
---|---|
WO2009152880A1 (en) | 2009-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R012 | Request for examination validly filed |
Effective date: 20150428 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |