DE102012210213A1 - Lifting cylinder combustion engine, has camshaft comprising sliding cam element, actuator device provided with actuator pin, and guide element fixed as C-shaped implemented spring for attaching to ends of sliding cam element - Google Patents
Lifting cylinder combustion engine, has camshaft comprising sliding cam element, actuator device provided with actuator pin, and guide element fixed as C-shaped implemented spring for attaching to ends of sliding cam element Download PDFInfo
- Publication number
- DE102012210213A1 DE102012210213A1 DE201210210213 DE102012210213A DE102012210213A1 DE 102012210213 A1 DE102012210213 A1 DE 102012210213A1 DE 201210210213 DE201210210213 DE 201210210213 DE 102012210213 A DE102012210213 A DE 102012210213A DE 102012210213 A1 DE102012210213 A1 DE 102012210213A1
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- Germany
- Prior art keywords
- combustion engine
- sliding cam
- internal combustion
- reciprocating internal
- cam element
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 210000001331 nose Anatomy 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 2
- 210000002105 tongue Anatomy 0.000 description 6
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002689 soil Substances 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
- 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
- F01L13/0042—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 being profiled in axial and radial direction
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
Description
Gebiet der ErfindungField of the invention
Hubkolbenbrennkraftmaschine mit zumindest einer Nockenwelle mit zumindest einem Schiebenockenelement mit Schiebenocken und sich X-förmig kreuzenden Verschiebenuten, das auf einer Grundwelle drehfest aber axial verschiebbar angeordnet ist, wobei zwischen den Verschiebenuten am Schiebenockenelement ein Führungselement fixiert ist, das elastisch bewegliche Weichenzungen aufweist, die an einer im Kreuzungsbereich gelagerten Drehgelenkplatte geführt sind, und mit einer Aktorvorrichtung mit zumindest einem aus einem Gehäuse heraus bewegbaren Aktorstift, wobei die Aktorvorrichtung an einem Bauteil eines Zylinderkopfes oder an dem Zylinderkopf der Hubkolbenbrennkraftmaschine befestigbar ist und der Aktorstift nach seiner Herausbewegung mit zumindest einer Verschiebenut des Schiebenockenelements in Verbindung tritt. Reciprocating internal combustion engine with at least one camshaft with at least one sliding cam element with sliding cam and X-shaped intersecting sliding grooves, which is rotatably mounted on a basic shaft but axially displaceable, between the sliding grooves on the sliding cam element, a guide element is fixed, which has elastically movable switch blades on a The actuator device is fastened to a component of a cylinder head or to the cylinder head of the reciprocating internal combustion engine and the Aktorstift after its movement out with at least one sliding groove of the sliding cam element in Connection occurs.
Hintergrund der ErfindungBackground of the invention
Ein derartiges Schiebenockensystem mit Führungselement ist aus der
Bei diesem Führungselement besteht das Problem, dass es sehr weit aufgeweitet werden muss, um mit den freien Enden der Weichenzungen über die Nut oder den Grundkreis der Verschiebenuten geschoben werden zu können, so dass eine plastische Verformung des Führungselements zu befürchten ist. Des Weiteren ist das Führungselement nur auf einem kleinen Teil des Innenumfangs in der Nut im Schiebenutengrund eingesetzt, so dass der Stützbereich in der Nut unerwünscht kurz ist und die freien Weichenzungen sehr lang ausgeführt sind, wodurch die Führungskraft beim Verschieben der Schiebenockenelemente reduziert ist. Selbst wenn die Enden der Weichenzungen sich an den Flanken des X-förmigen Kreuzungsbereichs abstützen, besteht die Gefahr, dass diese sich auf der freien Strecke vor dieser Abstützung unzulässig verbiegen.In this guide element, the problem is that it must be widened very far in order to be able to be pushed with the free ends of the switch blades on the groove or the base circle of the sliding grooves, so that a plastic deformation of the guide element is to be feared. Furthermore, the guide element is inserted only on a small part of the inner circumference in the groove in the sliding groove bottom, so that the support region in the groove is undesirably short and the free switch blades are designed to be very long, whereby the guide force is reduced when moving the sliding cam elements. Even if the ends of the switch blades are supported on the flanks of the X-shaped crossing region, there is a risk that they bend unduly on the free stretch before this support.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, das Schiebenockenelement und insbesondere das Führungselement so auszubilden und zu verbessern, dass die beschriebenen Nachteile vermieden werden und eine dauerhafte Verschiebung der Schiebenockenelemente über die Verschiebenuten bzw. die Weichenzungen möglich ist. Dies soll mit einfachen kostengünstigen Mitteln erfolgen.The object of the invention is therefore to design and improve the sliding cam element and in particular the guide element so that the disadvantages described are avoided and a permanent displacement of the sliding cam elements on the sliding grooves or the switch tongues is possible. This should be done with simple inexpensive means.
Zusammenfassung der ErfindungSummary of the invention
Die Aufgabe der Erfindung wird dadurch gelöst, dass das Führungselement als C-förmig ausgeführte Feder ausgebildet ist und zumindest mit seinen Enden am Schiebenockenelement fixiert ist. Durch diese Ausgestaltung des Führungselements wird erreicht, dass die C-förmig ausgeführte Feder nur um ein kleines Maß aufgebogen werden muss, um am Schiebenockenelement fixiert werden zu können. Des Weiteren ist dadurch sichergestellt, dass die Länge der elastischen beweglichen Weichenzungen um ein vielfaches verkürzt ist.The object of the invention is achieved in that the guide element is designed as a C-shaped executed spring and is fixed at least with its ends on the sliding cam element. This configuration of the guide element ensures that the C-shaped spring has to be bent only by a small amount in order to be able to be fixed on the sliding cam element. Furthermore, this ensures that the length of the elastic movable switch blades is shortened by a multiple.
In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass im Verschiebenutengrund Öffnungen eingearbeitet sind, in die Vorsprünge an der C-förmigen Feder einrastbar sind. Die Vorsprünge an den Enden können entsprechend der Dicke der Feder flach ausgeführt sein oder den Öffnungen angepasste Körper aufweisen, so dass diese sicher in die Öffnungen passen und dort fest sitzen. Die Öffnungen können als durchgehende Bohrungen oder als Sackbohrungen ausgeführt sein, je nachdem, wie groß die Abmessungen der Schiebenockenelemente sind. In a further embodiment of the invention it is proposed that in Verschiebenutengrund openings are incorporated, can be latched into the projections on the C-shaped spring. The projections at the ends can be made flat according to the thickness of the spring or have the openings adapted body so that they fit securely into the openings and sit there tight. The openings may be designed as through holes or as blind holes, depending on how large the dimensions of the sliding cam elements.
Weiterhin wird vorgeschlagen, dass die C-förmigen Federn einen inneren geschlossenen Bogen und einen äußeren zur Bildung der Weichenzungen unterbrochenen Bogen aufweisen. Dadurch erhält die C-förmige Feder zusätzlich zu den Fixierstellen einen sicheren Halt, weil zur Führung des inneren Bogens im Verschiebenutengrund eine Nut eingearbeitet ist. Diese Nut ist aufgrund der einfacheren Herstellung vorzugsweise umlaufend ausgeführt, obwohl sie nur entsprechend der C-förmigen Feder ca. 180° Winkel aufweisen müsste. Durch den von Fixierpunkt zu Fixierpunkt umlaufenden inneren Bogen ist es möglich, die Weichenzungen bis zu einer beliebigen Stelle an dem inneren Bogen so festzulegen, dass die Federsteifigkeit und die Elastizität der Weichenzungen beliebig eingestellt werden können. Furthermore, it is proposed that the C-shaped springs have an inner closed arc and an outer arc interrupted to form the switch blades. This gives the C-shaped spring in addition to the fixing a secure fit, because a groove is incorporated to guide the inner bow in Verschiebenutengrund. Because of its simpler manufacture, this groove is preferably circumferential, although it would only have to have an angle of approximately 180 ° in accordance with the C-shaped spring. By the inner arc circulating from the fixing point to the fixing point, it is possible to fix the switch tongues to an arbitrary position on the inner arch in such a way that the spring rigidity and the elasticity of the switch tongues can be set as desired.
Die Unterbrechung im äußeren Bogen bzw. der Abstand zwischen den Enden der Weichenzungen kann durch einen radialen Einschnitt erfolgen, wobei sich die Enden der Weichenzungen an den Außenflanken der Verschiebenuten anlegen können.The interruption in the outer arc or the distance between the ends of the switch blades can be effected by a radial cut, wherein the ends of the switch blades can bear against the outer edges of the sliding grooves.
In weiterer Ausgestaltung der Erfindung wird jedoch vorgeschlagen, dass diese Unterbrechung bzw. der Schlitz zwischen den stirnseitigen Enden der Weichenzungen in Umfangsrichtung des Schiebenockenelements geneigt ausgeführt ist. Dadurch ragt je eine Spitze oder Nase am inneren und am äußeren Umfang über die Mitte des X-förmigen Kreuzungsbereichs hinaus, so dass eine merklich längere Führung zwischen dem Aktorstift und den Weichenzungen gegeben ist.In a further embodiment of the invention, however, it is proposed that this interruption or the slot between the front ends of the switch blades in the circumferential direction of the sliding cam element is inclined. As a result, each protrudes a tip or nose on the inner and outer circumference over the middle of the X-shaped Junction so that a significantly longer guide between the actuator pin and the switch blades is given.
Die äußeren Flanken der Verschiebenuten im Kreuzungsbereich weisen dabei den Nasen der verlängerten Weichenzungen angepasste Freiräume auf, so dass sich die Enden der Weichenzungen ohne Stufe dort anlegen können.The outer edges of the sliding grooves in the crossing region have the noses of the extended switch blades adapted free spaces, so that the ends of the switch blades can create there without level.
Um für beide Enden der geneigten Unterbrechung zwischen den Weichenzungen eine glatte Anlage sicherzustellen, kann das Übersetzungsverhältnis der Weichenzungen an der Drehgelenkplatte unterschiedlich ausgeführt sein.To ensure a smooth contact for both ends of the inclined interruption between the switch blades, the transmission ratio of the switch blades on the hinge plate can be designed differently.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen Ausführungsbeispiele der Erfindung vereinfacht dargestellt sind.For further explanation of the invention reference is made to the drawings, in which embodiments of the invention are shown in simplified form.
Es zeigen: Show it:
Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings
In den
Bewegt sich nun, wie den Darstellungen in den
Wie in den
Um den Nasen
Toleranzen und Spielpassungen zwischen den Auskragungen
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Schiebenutenbereich Schiebenutenbereich
- 2 und 2a 2 and 2a
- Verschiebenutendisplacement grooves
- 33
- Nut groove
- 44
- C-Feder C-spring
- 5 und 5a 5 and 5a
- Vorsprüngeprojections
- 6 und 6a 6 and 6a
- durchgehende Bohrungenthrough holes
- 7 und 7a 7 and 7a
- Sackbohrungenblind holes
- 88th
- innerer Bogen inner bow
- 99
- äußerer Bogen outer arch
- 10 und 10a10 and 10a
- Weichenzungen switch blades
- 1111
- Auskragungen projections
- 1212
- Drehgelenkplatte Hinge plate
- 1313
- geneigte Unterbrechung inclined interruption
- 1414
- Freiräume Free rooms
- 1515
- Aktorstift actuator pin
- 16 und 16a 16 and 16a
- Nasennose
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
- DE 102008024911 A1 [0002] DE 102008024911 A1 [0002]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210210213 DE102012210213B4 (en) | 2012-06-18 | 2012-06-18 | Sliding cam system of a reciprocating internal combustion engine with X-shaped sliding grooves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210210213 DE102012210213B4 (en) | 2012-06-18 | 2012-06-18 | Sliding cam system of a reciprocating internal combustion engine with X-shaped sliding grooves |
Publications (2)
Publication Number | Publication Date |
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DE102012210213A1 true DE102012210213A1 (en) | 2013-12-19 |
DE102012210213B4 DE102012210213B4 (en) | 2014-12-11 |
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Application Number | Title | Priority Date | Filing Date |
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DE201210210213 Expired - Fee Related DE102012210213B4 (en) | 2012-06-18 | 2012-06-18 | Sliding cam system of a reciprocating internal combustion engine with X-shaped sliding grooves |
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DE (1) | DE102012210213B4 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013201826A1 (en) | 2013-02-05 | 2014-08-07 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam valve train of an internal combustion engine |
DE102013206495A1 (en) | 2013-04-12 | 2014-10-30 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam valve train of an internal combustion engine |
DE102013220559A1 (en) * | 2013-10-11 | 2015-04-16 | Schaeffler Technologies AG & Co. KG | Sliding cam system with X-shaped sliding grooves and C-shaped spring |
DE102014206478B3 (en) * | 2014-04-04 | 2015-08-20 | Schaeffler Technologies AG & Co. KG | Hubvariabler valve drive of an internal combustion engine |
DE102014220858A1 (en) | 2014-10-15 | 2016-04-21 | Mahle International Gmbh | Method of making a built camshaft |
DE102015203715B3 (en) * | 2015-03-03 | 2016-07-28 | Schaeffler Technologies AG & Co. KG | Valve gear of an internal combustion engine |
DE102015203714B3 (en) * | 2015-03-03 | 2016-07-28 | Schaeffler Technologies AG & Co. KG | Valve gear of an internal combustion engine |
DE102020103277B4 (en) | 2019-02-15 | 2025-01-09 | Honda Motor Co., Ltd. | Variable valve device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008024911A1 (en) | 2008-05-23 | 2009-11-26 | Schaeffler Kg | Valve gear for internal-combustion engine, has cam shaft, which has carrier shaft and cam part, where cam part is provided with guiding element |
-
2012
- 2012-06-18 DE DE201210210213 patent/DE102012210213B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008024911A1 (en) | 2008-05-23 | 2009-11-26 | Schaeffler Kg | Valve gear for internal-combustion engine, has cam shaft, which has carrier shaft and cam part, where cam part is provided with guiding element |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013201826A1 (en) | 2013-02-05 | 2014-08-07 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam valve train of an internal combustion engine |
WO2014121770A1 (en) | 2013-02-05 | 2014-08-14 | Schaeffler Technologies AG & Co. KG | Sliding cam valve drive of an internal combustion engine |
DE102013206495A1 (en) | 2013-04-12 | 2014-10-30 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam valve train of an internal combustion engine |
DE102013220559A1 (en) * | 2013-10-11 | 2015-04-16 | Schaeffler Technologies AG & Co. KG | Sliding cam system with X-shaped sliding grooves and C-shaped spring |
DE102013220559B4 (en) * | 2013-10-11 | 2015-04-30 | Schaeffler Technologies AG & Co. KG | Sliding cam system with X-shaped sliding grooves and C-shaped spring |
DE102014206478B3 (en) * | 2014-04-04 | 2015-08-20 | Schaeffler Technologies AG & Co. KG | Hubvariabler valve drive of an internal combustion engine |
DE102014220858A1 (en) | 2014-10-15 | 2016-04-21 | Mahle International Gmbh | Method of making a built camshaft |
US10087787B2 (en) | 2014-10-15 | 2018-10-02 | Mahle International Gmbh | Method for producing a built camshaft |
DE102015203715B3 (en) * | 2015-03-03 | 2016-07-28 | Schaeffler Technologies AG & Co. KG | Valve gear of an internal combustion engine |
DE102015203714B3 (en) * | 2015-03-03 | 2016-07-28 | Schaeffler Technologies AG & Co. KG | Valve gear of an internal combustion engine |
DE102020103277B4 (en) | 2019-02-15 | 2025-01-09 | Honda Motor Co., Ltd. | Variable valve device |
Also Published As
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DE102012210213B4 (en) | 2014-12-11 |
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