DE102010052173A1 - Sliding cam system for internal combustion engine, has locking device that is arranged in housing of adjusting device, such that locking structure is operatively coupled to sliding grooves on outer circumference of sliding cam - Google Patents
Sliding cam system for internal combustion engine, has locking device that is arranged in housing of adjusting device, such that locking structure is operatively coupled to sliding grooves on outer circumference of sliding cam Download PDFInfo
- Publication number
- DE102010052173A1 DE102010052173A1 DE102010052173A DE102010052173A DE102010052173A1 DE 102010052173 A1 DE102010052173 A1 DE 102010052173A1 DE 102010052173 A DE102010052173 A DE 102010052173A DE 102010052173 A DE102010052173 A DE 102010052173A DE 102010052173 A1 DE102010052173 A1 DE 102010052173A1
- Authority
- DE
- Germany
- Prior art keywords
- sliding cam
- sliding
- locking
- cam system
- housing
- 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- Withdrawn
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Classifications
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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
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/04—Adjustable cams
-
- 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
Abstract
Description
Gebiet der ErfindungField of the invention
Schiebenockensystem mit Schiebenocken, die auf einer Grundwelle, vorzugsweise einer als Nockenwelle dienenden Welle einer Hubkolbenbrennkraftmaschine, drehfest, aber verschiebbar angeordnet sind, mit einer, vorzugsweise elektromagnetisch betätigbaren, an einem ortsfesten Gehäuse gelagerten Vorrichtung zur Verstellung der Schiebenocken in unterschiedliche axiale Positionen mittels zumindest eines Stifts und Verschiebenuten am Umfang der Schiebenocken, und mit einer Vorrichtung zur Arretierung der Schiebenocken in den unterschiedlichen axialen Positionen, wobei die Arretiervorrichtung zumindest einen mittels einer Feder belasteten Arretierkörper, vorzugsweise eine Kugel, aufweist, der mit je einer der axialen Position zugeordneten Ausnehmung am Schiebenocken in Wirkverbindung steht.Sliding cam system with sliding cams which are rotatably but slidably mounted on a basic shaft, preferably a camshaft serving shaft of a reciprocating internal combustion engine, with a, preferably electromagnetically actuated, mounted on a stationary housing device for adjusting the sliding cam in different axial positions by means of at least one pin and sliding grooves on the circumference of the sliding cam, and with a device for locking the sliding cam in the different axial positions, wherein the locking device comprises at least one loaded by a spring locking body, preferably a ball, each with one of the axial position associated recess on the sliding cam in Active compound is.
Hintergrund der ErfindungBackground of the invention
Ein derartiges Schiebenockensystem ist durch die Hubkolbenbrennkraftmaschine 2.8 FSI der Firma Audi, veröffentlicht z. B. unter
Durch die unterschiedlichen Dehnungen zwischen den Schiebenocken und der Grundwelle infolge der in der Regel deutlich unterschiedlichen Wärmeausdehnungskoeffizienten müssen bei der Auslegung hohe Toleranzen berücksichtigt werden, welche zu Bauraumeinschränkungen und damit zu Einschränkungen im Anwendungsbereich oder zur Verwendung von speziellen teuren Alternativwerkstoffen führen.Due to the different strains between the sliding cam and the fundamental due to the usually significantly different thermal expansion coefficients must be considered in the design high tolerances, which lead to space limitations and thus to restrictions in the field or for the use of special expensive alternative materials.
Zusätzlich erfolgt eine Schwächung der Grundwelle durch die radialen Bohrungen, die über die Länge der Grundwelle verteilt bei jedem Schiebenocken erforderlich sind.In addition, a weakening of the fundamental wave by the radial bores, which are distributed over the length of the fundamental wave in each shift cam required.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, ein Schiebenockensystem der beschriebenen Art so zu verbessern, dass die genannten Nachteile behoben werden. Weiterhin soll dies mit einfachen Mitteln, kostengünstig erfolgen.The object of the invention is therefore to improve a sliding cam system of the type described so that the disadvantages mentioned are eliminated. Furthermore, this should be done inexpensively by simple means.
Zusammenfassung der ErfindungSummary of the invention
Die Aufgabe der Erfindung wird dadurch gelöst, dass die Arretiervorrichtung im Gehäuse der Verstellvorrichtung angeordnet ist und dass die Ausnehmungen als Nutrillen am Außenumfang der Schiebenocken ausgebildet sind. Dabei befinden sich die Nutrillen in welche der Arretierkörper, vorzugsweise eine Kugel, einrastet am Umfang des Verschiebenutbereichs am Schiebenocken. Für jede axiale Position des Schiebenockens befindet sich eine entsprechende Nutrille am Umfang des Schiebenockens. Alternativ kann auch der durch die Breite des Verschiebenutbereichs entstehende Absatz für die Nutrillen genutzt werden oder auch die Verschiebenuten selbst, so weit sie ohne Axialversatz umlaufen.The object of the invention is achieved in that the locking device is arranged in the housing of the adjusting device and that the recesses are formed as Nutrillen on the outer circumference of the sliding cam. In this case, the Nutrillen are in which the locking body, preferably a ball, engages the circumference of the Verschiebenutbereichs the sliding cam. For each axial position of the sliding cam there is a corresponding groove on the circumference of the sliding cam. Alternatively, the paragraph resulting from the width of the Verschiebenutbereichs can be used for the Nutrillen or even the sliding grooves themselves, as far as they rotate without axial misalignment.
Durch die Anordnung der Arretiervorrichtung im Gehäuse der Verstellvorrichtung bzw. des Aktors, dessen Gehäuse am Zylinderkopf oder einem Bauteil des Zylinderkopfes befestigt ist, wird das Problem der Toleranzerhöhung durch thermische Expansion eliminiert und keine Bohrungen in die sensible Grundwelle benötigt.The arrangement of the locking device in the housing of the adjusting device or of the actuator whose housing is attached to the cylinder head or a component of the cylinder head, the problem of tolerance increase is eliminated by thermal expansion and no drilling required in the sensitive fundamental wave.
In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass die Feder und/oder der Arretierkörper eine Ausfahrbegrenzung aufweisen. Dadurch wird erreicht, dass der Arretierkörper während seiner Arretierfunktion nicht dauerhaft in Gleitverbindung mit der Umfangsfläche der Nutrille steht, was trotz guter Schmierung im Bereich des Zylinderkopfes zu ungewolltem Verschleiß führen kann. Der Arretierkörper muss nämlich nicht dauerhaft mit dem Umfang der Nutrille in Verbindung stehen, da es ausreichend ist, wenn der Arretierkörper über die Flanken der Nutrille die Sicherung der axialen Position übernimmt.In a further embodiment of the invention it is proposed that the spring and / or the locking body have a Ausfahrbegrenzung. This ensures that the locking body is not permanently in sliding engagement with the peripheral surface of the Nutrille during its locking function, which despite good lubrication in the area of the cylinder head can lead to unwanted wear. Namely, the locking body does not have to be permanently connected to the circumference of the groove groove, since it is sufficient if the locking body takes over the securing of the axial position via the flanks of the groove groove.
Die Arretierbegrenzung kann beispielsweise als hülsenförmiger Anschlag ausgebildet sein, der in die Bohrung der Arretiervorrichtung, vorzugsweise eingepresst ist, den Arretierkörper führt und einen Anschlag für die Feder bildet. Die Arretierbegrenzung kann auch als Randbördelung am Ende der Bohrung ausgeführt sein, die das Austreten des Arretierkörpers aus der Bohrung begrenzt.The Arretierbegrenzung can be formed, for example, as a sleeve-shaped stopper, which is preferably pressed into the bore of the locking device, the locking body leads and forms a stop for the spring. The Arretierbegrenzung can also be designed as edge beading at the end of the bore, which limits the leakage of the locking body from the bore.
Kurze Beschreibung der Zeichnung Short description of the drawing
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung verwiesen, in der ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist.For further explanation of the invention reference is made to the drawing, in which an embodiment of the invention is shown in simplified form.
Es zeigt:It shows:
Detaillierte Beschreibung der ZeichnungDetailed description of the drawing
In
Es sei darauf hingewiesen, dass die Verschiebenut
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Grundwellefundamental wave
- 22
- Schiebenockenpushers
- 33
- Gehäusecasing
- 44
- Verschiebenutshift groove
- 55
- NutrilleNutrille
- 66
- Arretiervorrichtunglocking device
- 77
- Arretierkörperdetent
- 88th
- Bohrungdrilling
- 99
- Federfeather
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 Nicht-PatentliteraturCited non-patent literature
- www.autobild.de, Test Audi A6 Avant 2.8 FSI vom 30. Mai 2007 [0002] www.autobild.de, test Audi A6 Avant 2.8 FSI from May 30, 2007 [0002]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010052173A DE102010052173A1 (en) | 2010-11-22 | 2010-11-22 | Sliding cam system for internal combustion engine, has locking device that is arranged in housing of adjusting device, such that locking structure is operatively coupled to sliding grooves on outer circumference of sliding cam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010052173A DE102010052173A1 (en) | 2010-11-22 | 2010-11-22 | Sliding cam system for internal combustion engine, has locking device that is arranged in housing of adjusting device, such that locking structure is operatively coupled to sliding grooves on outer circumference of sliding cam |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010052173A1 true DE102010052173A1 (en) | 2012-05-24 |
Family
ID=46021235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102010052173A Withdrawn DE102010052173A1 (en) | 2010-11-22 | 2010-11-22 | Sliding cam system for internal combustion engine, has locking device that is arranged in housing of adjusting device, such that locking structure is operatively coupled to sliding grooves on outer circumference of sliding cam |
Country Status (1)
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DE (1) | DE102010052173A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014161620A1 (en) * | 2013-03-30 | 2014-10-09 | Daimler Ag | Valve train mechanism for an internal combustion engine of a motor vehicle |
DE102013214771A1 (en) | 2013-07-29 | 2015-01-29 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam system for an internal combustion engine with fork lock |
WO2015058745A1 (en) * | 2013-10-21 | 2015-04-30 | Schaeffler Technologies AG & Co. KG | Sliding cam system with bracket detent and fixing |
DE102015010125A1 (en) * | 2015-08-07 | 2017-02-09 | Thyssenkrupp Ag | Valve drive for gas exchange valves of an internal combustion engine |
DE102013210483B4 (en) * | 2013-06-06 | 2017-05-18 | Schaeffler Technologies AG & Co. KG | Locking device for a cam carrier of a sliding cam system |
DE102015015832A1 (en) | 2015-12-05 | 2017-06-08 | Daimler Ag | Valve train device and internal combustion engine with a valve drive device |
DE102016012048A1 (en) | 2016-10-07 | 2018-04-12 | Promescon Gmbh | Sliding cam valve drive for variable-stroke actuation of the gas exchange valves of an internal combustion engine |
EP3364000A1 (en) * | 2017-02-17 | 2018-08-22 | Honda Motor Co., Ltd. | Variable valve-operating device |
-
2010
- 2010-11-22 DE DE102010052173A patent/DE102010052173A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
www.autobild.de, Test Audi A6 Avant 2.8 FSI vom 30. Mai 2007 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014161620A1 (en) * | 2013-03-30 | 2014-10-09 | Daimler Ag | Valve train mechanism for an internal combustion engine of a motor vehicle |
DE102013210483B4 (en) * | 2013-06-06 | 2017-05-18 | Schaeffler Technologies AG & Co. KG | Locking device for a cam carrier of a sliding cam system |
DE102013214771A1 (en) | 2013-07-29 | 2015-01-29 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam system for an internal combustion engine with fork lock |
DE102013214771B4 (en) * | 2013-07-29 | 2016-02-04 | Schaeffler Technologies AG & Co. KG | Sliding cam system for an internal combustion engine with fork lock |
WO2015058745A1 (en) * | 2013-10-21 | 2015-04-30 | Schaeffler Technologies AG & Co. KG | Sliding cam system with bracket detent and fixing |
DE102015010125A1 (en) * | 2015-08-07 | 2017-02-09 | Thyssenkrupp Ag | Valve drive for gas exchange valves of an internal combustion engine |
DE102015010125B4 (en) * | 2015-08-07 | 2017-07-20 | Thyssenkrupp Ag | Valve drive for gas exchange valves of an internal combustion engine |
DE102015015832A1 (en) | 2015-12-05 | 2017-06-08 | Daimler Ag | Valve train device and internal combustion engine with a valve drive device |
DE102016012048A1 (en) | 2016-10-07 | 2018-04-12 | Promescon Gmbh | Sliding cam valve drive for variable-stroke actuation of the gas exchange valves of an internal combustion engine |
EP3364000A1 (en) * | 2017-02-17 | 2018-08-22 | Honda Motor Co., Ltd. | Variable valve-operating device |
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Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120827 Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120827 |
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Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150407 |
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