DE102011088298A1 - Lifting cylinder combustion engine, has retaining unit provided with frictional, spring-loaded, tapered control needles, and actuator pins fixable by positive, lockable detent in retracted position in which pins are away from cam unit - Google Patents
Lifting cylinder combustion engine, has retaining unit provided with frictional, spring-loaded, tapered control needles, and actuator pins fixable by positive, lockable detent in retracted position in which pins are away from cam unit Download PDFInfo
- Publication number
- DE102011088298A1 DE102011088298A1 DE201110088298 DE102011088298A DE102011088298A1 DE 102011088298 A1 DE102011088298 A1 DE 102011088298A1 DE 201110088298 DE201110088298 DE 201110088298 DE 102011088298 A DE102011088298 A DE 102011088298A DE 102011088298 A1 DE102011088298 A1 DE 102011088298A1
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- DE
- Germany
- Prior art keywords
- combustion engine
- sliding cam
- pins
- internal combustion
- actuator
- 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.)
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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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
- H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
-
- 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
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
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- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/031—Electromagnets
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Gebiet der ErfindungField of the invention
Hubkolbenbrennkraftmaschine mit zumindest einem Zylinderkopf, dessen Einund Auslasskanäle von zumindest je einem Ein- und Auslassgaswechselventil beherrscht sind, die durch Nocken zumindest einer Nockenwelle und von diesen angetriebenen Übertragungselementen betätigbar sind, wobei die Nocken als Schiebenocken mit zumindest einem Nocken pro Schiebenockeneinheit ausgebildet sind, die drehfest aber axial verschiebbar auf einer brennkraftmaschinenfest geführten, angetriebenen Grundwelle angeordnet sind, und mit zumindest einer brennkraftmaschinenfesten Aktoreinheit pro Schiebenockeneinheit mit zumindest einem Aktorstift zur Verschiebung der Schiebenockeneinheiten in unterschiedliche axiale Positionen mittels zumindest zwei mit den Aktorstiften zusammenwirkenden Verschiebenuten am Umfang der Schiebenockeneinheiten, die schraubenförmig ausgebildet, spiegelsymmetrisch zueinander angeordnet und zumindest eine Auswurframpe für die Aktorstifte aufweisen, wobei die Aktorstifte in Richtung zur Schiebenockeneinheit federbelastet sind und in eingefahrenen, der Schiebenockeneinheit abgewandten Positionen mittels festlegbarer Reibschlussverbindung fixierbar sind und wobei die Festlegeeinrichtungen mit Klemmkörpern der Reibschlussverbindungen korrespondierende, federbelastete, konische Steuernadeln aufweisen, die mittels einer Elektromagneteinheit lösbar sind.Reciprocating internal combustion engine with at least one cylinder head whose Einund Auslasskanäle are dominated by at least one inlet and Auslassgaswechselventil which are actuated by cams at least one camshaft and driven by these transmission elements, wherein the cams are designed as sliding cam with at least one cam per sliding cam unit, the rotationally fixed but axially displaceably arranged on a motor driven fixed basic shaft, and with at least one engine-fixed actuator per sliding cam unit with at least one Aktorstift for shifting the sliding cam units in different axial positions by means of at least two cooperating with the Aktorstiften sliding grooves on the circumference of the sliding cam units, which are helically formed arranged mirror-symmetrically to each other and having at least one ejection ramp for the Aktorstifte, the Aktorstifte in direction z Ur push cam unit are spring loaded and in retracted, the sliding cam unit remote positions by means of fixable frictional connection can be fixed and wherein the fixing means with clamping bodies of Reibschlussverbindungen corresponding, spring-loaded, conical control needles, which are solvable by means of a solenoid unit.
Hintergrund der ErfindungBackground of the invention
Eine derartige Aktoreinheit für Hubkolbenbrennkraftmaschinen ist aus der
Da die Klemmung der Aktorstifte reibwertabhängig ist, besteht das Problem, dass die Aktorstifte beim Einschieben durch die Auswurframpe nicht genug festgelegt werden oder, z.B. hervorgerufen durch Vibrationen der Hubkolbenbrennkraftmaschine, sich in der Reibschlussverbindung lösen und die Verschiebenuten bzw. den neben den Verschiebenuten liegenden Umfangsbereich ungewollt kontaktieren. Rutscht der Aktorstift in Richtung der Nockenkontur der Schiebenockeneinheit ab, so wird er beim Überfahren der Auswurframpe wieder zurückgestellt, d.h. der abgesunkene Aktorstift wird wieder auf das Niveau des Hochkreises der Schiebenockeneinheit zurückgeschoben. In diesem Fall soll die Steuernadel sofort nach dem Hochschieben des Aktorstiftes erneut die Festlegung der Reibschlussverbindung sicherstellen, was nur dann der Fall ist, wenn die durch die Federkraft der Steuernadeln hervorgerufene Beschleunigung hoch genug ist, um die Arretierung schnell genug zu bewirken, was aber nicht immer der Fall ist. Since the clamping of the actuator pins is dependent on the coefficient of friction, there is the problem that the actuator pins are not fixed sufficiently during insertion through the ejection ramp, or, e.g. caused by vibrations of Hubkolbenbrennkraftmaschine, solve in the frictional connection and contact the sliding grooves or lying next to the sliding grooves peripheral area unintentionally. If the actuator pin slides in the direction of the cam contour of the sliding cam unit, it is reset when the ejection ramp is passed over, ie. the sunken actuator pin is pushed back to the level of the high circuit of the sliding cam unit. In this case, the control needle immediately after pushing up the Aktorstiftes again ensure the determination of the frictional connection, which is the case only when caused by the spring force of the control pins acceleration is high enough to cause the lock fast enough, but not always the case.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, eine Aktor- und Schiebenockeneinheit für Hubkolbenbrennkraftmaschinen so zu verbessern, dass die zuvor beschriebenen Nachteile vermieden werden. Es soll sichergestellt sein, dass kein ungewolltes Lösen der Aktorstifte erfolgt. Dies soll mit einfachen und kostengünstigen Mitteln erfolgen. The object of the invention is therefore to improve an actuator and sliding cam unit for reciprocating internal combustion engines so that the disadvantages described above are avoided. It should be ensured that no unintentional release of the actuator pins takes place. This should be done with simple and inexpensive means.
Zusammenfassung der ErfindungSummary of the invention
Die Aufgabe der Erfindung wird dadurch gelöst, dass die Aktorstifte in eingefahrenen, der Schiebenockeneinheit abgewandten Positionen mittels formschlüssiger, arretierbarer Rasteinrichtungen festlegbar sind, wobei die Arretierungen mit Klemmkörpern der Rasteinrichtungen korrespondierende, federbelastete Steuernadeln aufweisen, die mittels der Elektromagneteinheit lösbar sind. Dadurch wird sichergestellt, dass die Aktorstifte, abgesehen von kurzen Zwischenphasen, in einer sicheren Rastposition verharren, sodass keine ungewollte Kontaktierung der Verschiebenuten und des Umfangsbereichs der Schiebenockeneinheiten durch die Aktorstifte erfolgt. Dies ist auch deshalb von Bedeutung, weil je nach Betrieb der Hubkolbenbrennkraftmaschine, auch längere Betriebszeiten ohne Betätigung der Aktoreinheit möglich sind.The object of the invention is achieved in that the Aktorstifte in retracted, the sliding cam unit remote positions by means of positive locking locking devices are fixed, the detents with clamping bodies of the locking devices corresponding, spring-loaded control needles, which are solvable by means of the solenoid unit. This ensures that the Aktorstifte, apart from short intermediate phases, remain in a secure locking position, so that no unwanted contacting of the sliding grooves and the peripheral portion of the sliding cam units is done by the Aktorstifte. This is also important because, depending on the operation of the reciprocating internal combustion engine, longer operating times without actuation of the actuator unit are possible.
Die Klemmkörper stehen dabei mit einem die Aktorstifte tragenden Stützgehäuse oder im Stützgehäuse geführten Lagerbuchsen in Wirkverbindung.The clamp bodies are in operative connection with a support housing carrying the actuator pins or bearing bushes guided in the support housing.
Am Stützgehäuse oder den Lagerbuchsen sind den Klemmkörpern zugewandte Reibschlussflächen und zumindest eine Rastkante vorgesehen. Die Rastkante dient dazu, die Aktorstifte in der vollständig eingefahrenen Position sicher festzulegen. Die zumindest eine Rastkante ist deshalb auf der eingefahrenen, der Schiebenockeneinheit abgewandten Position im Anschluss an die Reibschlussflächen vorgesehen.On the support housing or the bearing bushings the friction bodies facing the clamping bodies and at least one locking edge are provided. The locking edge serves to securely fix the actuator pins in the fully retracted position. The at least one latching edge is therefore provided on the retracted, the sliding cam unit remote position following the frictional surfaces.
Da die Klemmkörper Bestandteile sowohl der Reibschlussverbindungen als auch der Rasteinrichtungen sind, weisen die Steuernadeln im Anschluss an die Konusflächen für die Reibschlussverbindung zumindest eine Raststufe auf. Since the clamping bodies are components of both the frictionally engaged connections and the latching devices, the control needles have at least one latching step following the conical surfaces for the frictionally engaged connection.
Die Schiebenuten der Schiebenockeneinheit sind so ausgebildet, dass der Einfahrbereich der zweiten Verschiebenut in derselben Querschnittsebene der Schiebenockeneinheit liegt, wie die Auswurframpe der in Drehrichtung vorauseilenden ersten Verschiebenut. Dabei sind zumindest zwei Aktorstifte parallel zueinander angeordnet und in Längsrichtung der Grundwelle ausgerichtet, wobei mit zwei Aktorstiften und den beiden hintereinander angeordneten Verschiebenuten Verschiebungen der Schiebenockeneinheit in drei axiale Positionen möglich sind. The sliding grooves of the sliding cam unit are designed such that the retraction area of the second displacement groove lies in the same cross-sectional plane of the sliding cam unit as the ejection ramp of the first displacement groove leading in the direction of rotation. In this case, at least two actuator pins are arranged parallel to each other and aligned in the longitudinal direction of the fundamental shaft, with two actuator pins and the two successively arranged displacement grooves displacements of the sliding cam unit in three axial positions are possible.
In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass neben den Einfahrbereichen der ersten und der zweiten Verschiebenut in den Spurebenen beider Aktorstifte auf dem Umfang der Schiebenockeneinheiten Überhubrampen vorgesehen sind. In a further embodiment of the invention, it is proposed that in addition to the retraction areas of the first and the second displacement groove in the track planes of both actuator pins on the circumference of the sliding cam units are provided overrunning ramps.
Der Hubbeginn der Überhubrampen liegt dabei im Bereich der Auswurframpe der Verschiebenuten.The stroke start of the overrun ramps is in the range of the ejection ramp of the sliding grooves.
Die Hubhöhe der Überhubrampe ist so gewählt, dass sie zumindest den Einfahrweg der Aktorstifte bis zur Arretierung der Rasteinrichtungen umfasst. The lifting height of the overstroke ramp is chosen so that it comprises at least the Einfahrweg the Aktorstifte until the locking of the locking devices.
Durch diese Überhubrampen wird sichergestellt, dass die Aktorstifte so weit angehoben werden, dass eine Rastung erfolgt. In kurzen Zwischenstrecken werden die Aktorstifte durch die Auswurframpe so weit angehoben, dass sie durch die Reibschlussverbindung über die Konusse der Steuernadeln festgehalten werden. Dies reicht vollständig aus, da die Festlegezeit in der Reibschlussverbindung verhältnismäßig kurz ist.These overrun ramps ensure that the actuator pins are raised enough to latch. In short intermediate sections, the actuator pins are lifted by the ejection ramp so far that they are held by the frictional connection on the cones of the control needles. This is sufficient, since the retention time in the frictional connection is relatively short.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist.For further explanation of the invention reference is made to the drawings, in which an embodiment of the invention is shown in simplified form.
Es zeigen: Show it:
Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings
In den
In
Wie weiterhin in
Der Aktorstift
Die Schiebenockeneinheit befindet sich nun in einer Endstellung und verbleibt dort bis eine erneute Bestromung der Elektromagneteinheit erfolgt. Dann wird die Schiebenockeneinheit zunächst um einige, danach ggf. auch um eine zweite axiale Position zurückgeschoben.The sliding cam unit is now in an end position and remains there until a renewed energization of the solenoid unit. Then, the sliding cam unit is first pushed back by a few, then possibly also by a second axial position.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Aktoreinheit actuator
- 22
- Stützgehäuse support housing
- 33
- Flanschgehäuse flange
- 44
- Lagerbuchse bearing bush
- 55
- Aktorstift actuator pin
- 66
- Feder feather
- 77
- Führungslager guide bearing
- 88th
- Steuernadel control needle
- 99
- Dauermagnet permanent magnet
- 1010
- Druckfeder compression spring
- 1111
- Klemmkörper clamping bodies
- 1212
- Rastkante catch edge
- 1313
- Reibschlussfläche Reibschlussfläche
- 14 14
- Konusbereichcone region
- 1515
- Raststufe catching step
- 1616
- Auswurframpe ejection ramp
- 1717
- erste Verschiebenut first shift groove
- 1818
- Einfahrbereich insertion zone
- 1919
- zweite Verschiebenut second shift groove
- 2020
- Überhubrampen Überhubrampen
- 2121
- Pfeile arrows
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES 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 of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- WO 2010/097298 A1 [0002] WO 2010/097298 A1 [0002]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110088298 DE102011088298A1 (en) | 2011-12-12 | 2011-12-12 | Lifting cylinder combustion engine, has retaining unit provided with frictional, spring-loaded, tapered control needles, and actuator pins fixable by positive, lockable detent in retracted position in which pins are away from cam unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110088298 DE102011088298A1 (en) | 2011-12-12 | 2011-12-12 | Lifting cylinder combustion engine, has retaining unit provided with frictional, spring-loaded, tapered control needles, and actuator pins fixable by positive, lockable detent in retracted position in which pins are away from cam unit |
Publications (1)
Publication Number | Publication Date |
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DE102011088298A1 true DE102011088298A1 (en) | 2013-06-13 |
Family
ID=48464421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201110088298 Withdrawn DE102011088298A1 (en) | 2011-12-12 | 2011-12-12 | Lifting cylinder combustion engine, has retaining unit provided with frictional, spring-loaded, tapered control needles, and actuator pins fixable by positive, lockable detent in retracted position in which pins are away from cam unit |
Country Status (1)
Country | Link |
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DE (1) | DE102011088298A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013201308A1 (en) * | 2013-01-28 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Actuator for sliding cam system of engine, has control pin that is actuated by electromagnet unit, so that pin is guided in pressure plate axially displaceably and form-locking counter to force direction of springs in their movement |
DE102013202130A1 (en) * | 2013-02-08 | 2014-08-14 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam actuator for sliding cam system of internal combustion engine, has armature that is arranged to winding, such that running pin is extended from housing at occurrence of magnetic force and is immersed in slide groove of cam |
WO2015063197A3 (en) * | 2013-10-30 | 2015-06-25 | Avl List Gmbh | Method and assembly for monitoring an actuator device |
WO2015097068A1 (en) * | 2013-12-23 | 2015-07-02 | Eto Magnetic Gmbh | Electromagnetic actuating mechanism |
DE102015205847A1 (en) | 2014-04-24 | 2015-10-29 | Schaeffler Technologies AG & Co. KG | Drehschwinungsdämpfer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010097298A1 (en) | 2009-02-27 | 2010-09-02 | Schaeffler Technologies Gmbh & Co. Kg | Electromagnetic actuating device |
-
2011
- 2011-12-12 DE DE201110088298 patent/DE102011088298A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010097298A1 (en) | 2009-02-27 | 2010-09-02 | Schaeffler Technologies Gmbh & Co. Kg | Electromagnetic actuating device |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013201308A1 (en) * | 2013-01-28 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Actuator for sliding cam system of engine, has control pin that is actuated by electromagnet unit, so that pin is guided in pressure plate axially displaceably and form-locking counter to force direction of springs in their movement |
DE102013202130A1 (en) * | 2013-02-08 | 2014-08-14 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam actuator for sliding cam system of internal combustion engine, has armature that is arranged to winding, such that running pin is extended from housing at occurrence of magnetic force and is immersed in slide groove of cam |
WO2015063197A3 (en) * | 2013-10-30 | 2015-06-25 | Avl List Gmbh | Method and assembly for monitoring an actuator device |
CN105934566A (en) * | 2013-10-30 | 2016-09-07 | 李斯特内燃机及测试设备公司 | Method and assembly for monitoring an actuator device |
US10012116B2 (en) | 2013-10-30 | 2018-07-03 | Avl List Gmbh | Method and assembly for monitoring an actuator device |
WO2015097068A1 (en) * | 2013-12-23 | 2015-07-02 | Eto Magnetic Gmbh | Electromagnetic actuating mechanism |
US9741481B2 (en) | 2013-12-23 | 2017-08-22 | Eto Magnetic Gmbh | Electromagnetic actuating mechanism |
DE102015205847A1 (en) | 2014-04-24 | 2015-10-29 | Schaeffler Technologies AG & Co. KG | Drehschwinungsdämpfer |
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