DE102008049181A1 - Electrohydraulic valve control - Google Patents
Electrohydraulic valve control Download PDFInfo
- Publication number
- DE102008049181A1 DE102008049181A1 DE102008049181A DE102008049181A DE102008049181A1 DE 102008049181 A1 DE102008049181 A1 DE 102008049181A1 DE 102008049181 A DE102008049181 A DE 102008049181A DE 102008049181 A DE102008049181 A DE 102008049181A DE 102008049181 A1 DE102008049181 A1 DE 102008049181A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- hydraulic
- hydraulic valve
- pressure relief
- control
- 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- Withdrawn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
- 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
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
-
- 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
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/12—Fail safe operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Vorgeschlagen ist eine elektrohydraulische Ventilsteuerung (1) zur variablen Betätigung eines Gaswechselventils (2) einer Brennkraftmaschine, umfassend ein Hydraulikventil (13) und, zwecks Notlaufeigenschaft, ein weiteres Hydraulikventil (19).Proposed is an electro-hydraulic valve control (1) for the variable actuation of a gas exchange valve (2) of an internal combustion engine, comprising a hydraulic valve (13) and, for emergency running property, another hydraulic valve (19).
Description
Die Erfindung betrifft eine elektrohydraulische Ventilsteuerung zur variablen Betätigung eines Gaswechselventils einer Brennkraftmaschine. Die Ventilsteuerung umfasst:
- – einen von einer Nockenwelle angetriebenen Geberkolben,
- – einen das Gaswechselventil antreibenden Nehmerkolben,
- – einen von dem Geberkolben und dem Nehmerkolben begrenzten Druckraum mit veränderlichem Volumen,
- – einen an eine Hydraulikmittelversorgung der Brennkraftmaschine angeschlossen Druckentlastungsraum,
- – eine den Druckraum mit dem Druckentlastungsraum verbindende Steuerleitung und ein darin angeordnetes, elektrisch ansteuerbares Hydraulikventil, das einen Hydraulikmittelfluss durch die Steuerleitung freigibt oder sperrt,
- – eine den Druckraum mit dem Druckentlastungsraum verbindende Bypassleitung und ein darin angeordnetes Rückschlagventil, das einen Hydraulikmittelfluss durch die Bypassleitung in den Druckraum freigibt und in den Druckentlastungsraum sperrt.
- A master piston driven by a camshaft,
- A slave piston driving the gas exchange valve,
- A pressure chamber of variable volume bounded by the master piston and the slave piston,
- A pressure relief space connected to a hydraulic fluid supply of the internal combustion engine,
- A control line connecting the pressure chamber with the pressure relief space and an electrically controllable hydraulic valve arranged therein which releases or blocks a hydraulic fluid flow through the control line,
- - A bypass line connecting the pressure chamber to the pressure relief chamber and a non-return valve arranged therein, which releases a hydraulic fluid flow through the bypass line into the pressure chamber and blocks in the pressure relief space.
Hintergrund der ErfindungBackground of the invention
Eine
derartige Ventilsteuerung geht aus der als gattungsbildend betrachteten
Da jedoch ein nicht mehr schließendes Hydraulikventil mit einer Stilllegung des oder der zugehörigen Gaswechselventile einhergeht und eine Fehlfunktion des Hydraulikventils nie vollständig ausgeschlossen werden kann, mangelt es der in der zitierten Druckschrift vorgeschlagenen Ventilsteuerung an Notlaufeigenschaften, die einen zumindest eingeschränkten Weiterbetrieb der Brennkraftmaschine ermöglichen.There However, a no longer closing hydraulic valve with a decommissioning of the associated gas exchange valves is accompanied and malfunction of the hydraulic valve never completely can be excluded, it lacks the cited document proposed valve control on emergency running, the one at least limited continued operation of the internal combustion engine enable.
Aufgabe der ErfindungObject of the invention
Der vorliegenden Erfindung liegt daher die Aufgabe zu Grunde, eine Ventilsteuerung der eingangs genannten Art so fortzubilden, dass diese auch im Falle einer Fehlfunktion des Hydraulikventils eine ausreichende Notlaufeigenschaft aufweist. Hierunter ist zu verstehen, dass auch im Notlaufbetrieb ein für einen erfolgreichen Ladungswechsel der Brennkraftmaschine ausreichender Ventilhub erzeugt werden kann.Of the The present invention is therefore based on the object, a valve control of the type mentioned above so that they also in the case a malfunction of the hydraulic valve sufficient emergency running property having. This is to be understood that even in emergency operation for a successful charge change of the internal combustion engine sufficient valve lift can be generated.
Zusammenfassung der ErfindungSummary of the invention
Die Lösung dieser Aufgabe ergibt sich aus den kennzeichnenden Merkmalen des Anspruchs 1, während vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung den Unteransprüchen entnehmbar sind. Demnach soll die Ventilsteuerung ein weiteres Hydraulikventil umfassen, das in der Steuerleitung zwischen dem Hydraulikventil und dem Druckentlastungsraum angeordnet ist und das bei fehlerhaft offenem Hydraulikventil den Hydraulikmittelfluss durch die Steuerleitung in den Druckentlastungsraum sperrt. Durch diese Maßnahme wird auch bei permanent offen stehendem Hydraulikventil – beispielsweise aufgrund einer elektrischen Stromunterbrechung oder eines mechanischen Defekts am Hydraulikventil – ein für die Hubübertragung auf das Gaswechselventil ausreichender Druckaufbau im Druckraum ermöglicht, indem das weitere Hydraulikventil während des Notlaufbetriebs geschlossen und somit eine Druckentlastung des Druckraums verhindert wird.The Solution to this problem arises from the characterizing Features of claim 1, while advantageous developments and embodiments of the invention, the dependent claims are. Accordingly, the valve control is another hydraulic valve include that in the control line between the hydraulic valve and the pressure relief space is arranged and that at faulty open hydraulic valve, the hydraulic fluid flow through the control line locks in the pressure relief space. By this measure is also at permanently open hydraulic valve - for example due to an electric power interruption or a mechanical Defective hydraulic valve - one for stroke transmission on the gas exchange valve sufficient pressure build-up in the pressure chamber enabled by the additional hydraulic valve during the Emergency operation closed and thus a pressure relief of the pressure chamber is prevented.
Für den im Sinne der Erfindung zweckmäßigen Fall, dass das Hydraulikventil stromlos offen ausgebildet ist, kann es vorgesehen sein, dass das weitere Hydraulikventil ebenfalls elektrisch ansteuerbar und stromlos offen ausgebildet ist. Ein wesentlicher Vorteil dieser Auslegung ist die günstige Energiebilanz der Ventilsteuerung, da dann das weitere Hydraulikventil lediglich während des Notlaufbetriebs zu bestromen wäre. Ungeachtet dessen besteht dennoch auch die Möglichkeit, das weitere Hydraulikventil als stromlos geschlossene Ausführung vorzusehen und/oder statt dessen elektrischer Ansteuerung eine hydraulische, pneumatische oder mechanische Ansteuerung zu wählen.For the case appropriate for the purposes of the invention, that the hydraulic valve is formed normally open, it can be provided that the further hydraulic valve also electrically controllable and normally open is formed. A significant advantage this interpretation is the favorable energy balance of the valve control, because then the other hydraulic valve only during the Emergency operation would be powered. Regardless, it persists but also the possibility of the other hydraulic valve Provide as normally closed version and / or instead of electrical control, a hydraulic, pneumatic or to select mechanical control.
Außerdem soll das Hydraulikventil deutlich schneller schaltend als das weitere Hydraulikventil ausgebildet sein. Da während des zeitlich begrenzten Notlaufbetriebs auf die normale Funktionalität der Ventilsteuerung verzichtet werden kann, kann das weitere Hydraulikventil permanent geschlossen bleiben und folglich als vergleichsweise langsam schaltendes und kostengünstiges Ventil ausgebildet sein.Furthermore should the hydraulic valve switching much faster than the other Hydraulic valve be formed. As during the time limited emergency mode to normal functionality the valve control can be omitted, the other hydraulic valve remain permanently closed and therefore comparatively slow be designed switching and inexpensive valve.
Kurze Beschreibung der ZeichnungShort description of the drawing
Weitere Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus der Zeichnung, in der ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist. Die einzige Figur zeigt einen hydraulischen Schaltplan einer erfindungsgemäßen elektrohydraulischen Ventilsteuerung.Further features of the invention will become apparent from the following description and from the drawing, in which an embodiment of the Er is shown in simplified form. The single FIGURE shows a hydraulic circuit diagram of an electrohydraulic valve control according to the invention.
Detaillierte Beschreibung der ZeichnungDetailed description the drawing
In
der Figur sind die wesentlichen Komponenten einer erfindungsgemäßen
elektrohydraulischen Ventilsteuerung
Der
an eine Hydraulikmittelversorgung
Für
den Fall, dass das Hydraulikventil
An
die Umschaltgeschwindigkeit des weiteren Hydraulikventils
- 11
- Ventilsteuerungvalve control
- 22
- GaswechselventilGas exchange valve
- 33
- Geberkolbenmaster piston
- 44
- Nockenfolgercam follower
- 55
- Nockencam
- 66
- Nockenwellecamshaft
- 77
- Nehmerkolbenslave piston
- 88th
- Ventilbrückevalve bridge
- 99
- Ventilfedervalve spring
- 1010
- Druckraumpressure chamber
- 1111
- Steuerleitungcontrol line
- 1212
- DruckentlastungsraumPressure relief chamber
- 1313
- Hydraulikventilhydraulic valve
- 1414
- HydraulikmittelversorgungHydraulic medium supply
- 1515
- Rückschlagventilcheck valve
- 1616
- Druckspeicheraccumulator
- 1717
- Bypassleitungbypass line
- 1818
- Rückschlagventilcheck valve
- 1919
- weiteres Hydraulikventiladditional hydraulic valve
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
- - EP 0931912 A2 [0002] - EP 0931912 A2 [0002]
Claims (4)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008049181A DE102008049181A1 (en) | 2008-09-26 | 2008-09-26 | Electrohydraulic valve control |
CN2009801378683A CN102165148B (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
EP09782988.1A EP2329116B1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
US13/121,257 US20110277712A1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
KR1020117006852A KR101581068B1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
PCT/EP2009/061895 WO2010034643A1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008049181A DE102008049181A1 (en) | 2008-09-26 | 2008-09-26 | Electrohydraulic valve control |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008049181A1 true DE102008049181A1 (en) | 2010-04-01 |
Family
ID=41353850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008049181A Withdrawn DE102008049181A1 (en) | 2008-09-26 | 2008-09-26 | Electrohydraulic valve control |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110277712A1 (en) |
EP (1) | EP2329116B1 (en) |
KR (1) | KR101581068B1 (en) |
CN (1) | CN102165148B (en) |
DE (1) | DE102008049181A1 (en) |
WO (1) | WO2010034643A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010022346A1 (en) | 2010-06-01 | 2011-12-01 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve control |
DE102013100632A1 (en) | 2013-01-22 | 2014-07-24 | Lsp Innovative Automotive Systems Gmbh | Variable electrohydraulic valve control |
DE102015216866A1 (en) | 2015-09-03 | 2017-03-09 | Schaeffler Technologies AG & Co. KG | Electrohydraulic valve control with variable valve lift and heat engine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8701607B2 (en) | 2011-08-25 | 2014-04-22 | Chrysler Group Llc | System and method for engine valve lift strategy |
DE102012221354A1 (en) | 2012-11-22 | 2013-01-24 | Schaeffler Technologies AG & Co. KG | Hydraulic unit for cylinder head of internal combustion engine with hydraulically variable gas exchange valve train, has hydraulic connection, which is provided between high pressure chamber and medium-pressure chamber |
WO2015167412A1 (en) * | 2014-04-29 | 2015-11-05 | Ford Otomotiv Sanayi Anonim Sirketi | Valve timing system |
DE102016218918B4 (en) * | 2016-09-29 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with hydraulically variable gas exchange valve drive |
US10233795B2 (en) * | 2017-02-15 | 2019-03-19 | Schaeffler Technologies AG & Co. KG | Bypass valve for pressure oscillation control |
DE102017005069A1 (en) * | 2017-05-22 | 2018-11-22 | Bernd Niethammer | Device for adjusting the stroke of a valve of internal combustion engines |
Citations (1)
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EP0931912A2 (en) | 1998-01-23 | 1999-07-28 | C.R.F. Società Consortile per Azioni | Internal combustion engine with variable hydraulic valve actuating system |
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-
2008
- 2008-09-26 DE DE102008049181A patent/DE102008049181A1/en not_active Withdrawn
-
2009
- 2009-09-15 US US13/121,257 patent/US20110277712A1/en not_active Abandoned
- 2009-09-15 KR KR1020117006852A patent/KR101581068B1/en active IP Right Grant
- 2009-09-15 EP EP09782988.1A patent/EP2329116B1/en not_active Not-in-force
- 2009-09-15 CN CN2009801378683A patent/CN102165148B/en not_active Expired - Fee Related
- 2009-09-15 WO PCT/EP2009/061895 patent/WO2010034643A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0931912A2 (en) | 1998-01-23 | 1999-07-28 | C.R.F. Società Consortile per Azioni | Internal combustion engine with variable hydraulic valve actuating system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010022346A1 (en) | 2010-06-01 | 2011-12-01 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve control |
EP2392789A1 (en) | 2010-06-01 | 2011-12-07 | Schaeffler Technologies AG & Co. KG | Electrohydraulic valve control |
US8726860B2 (en) | 2010-06-01 | 2014-05-20 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve controller |
DE102013100632A1 (en) | 2013-01-22 | 2014-07-24 | Lsp Innovative Automotive Systems Gmbh | Variable electrohydraulic valve control |
DE102015216866A1 (en) | 2015-09-03 | 2017-03-09 | Schaeffler Technologies AG & Co. KG | Electrohydraulic valve control with variable valve lift and heat engine |
Also Published As
Publication number | Publication date |
---|---|
CN102165148B (en) | 2013-07-17 |
KR101581068B1 (en) | 2015-12-29 |
US20110277712A1 (en) | 2011-11-17 |
EP2329116A1 (en) | 2011-06-08 |
WO2010034643A1 (en) | 2010-04-01 |
CN102165148A (en) | 2011-08-24 |
EP2329116B1 (en) | 2014-12-17 |
KR20110059627A (en) | 2011-06-02 |
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