DE102007059079A1 - Cam for camshaft in reciprocating piston internal combustion engine, has base circuit formed by cam roller that is arranged in area of cam coaxial to cam shaft, where roller is formed as sliding supported roller or rolling-supported roller - Google Patents
Cam for camshaft in reciprocating piston internal combustion engine, has base circuit formed by cam roller that is arranged in area of cam coaxial to cam shaft, where roller is formed as sliding supported roller or rolling-supported roller Download PDFInfo
- Publication number
- DE102007059079A1 DE102007059079A1 DE102007059079A DE102007059079A DE102007059079A1 DE 102007059079 A1 DE102007059079 A1 DE 102007059079A1 DE 102007059079 A DE102007059079 A DE 102007059079A DE 102007059079 A DE102007059079 A DE 102007059079A DE 102007059079 A1 DE102007059079 A1 DE 102007059079A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- roller
- camshaft
- sliding
- rolling
- 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
- 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
-
- 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
-
- 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
- F01L1/08—Shape of 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
- F01L2305/00—Valve arrangements comprising rollers
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
- F01L2305/02—Mounting of rollers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Die Erfindung betrifft eine Nocke einer Nockenwelle mit einer Nockenspitze und einem Grundkreis zur Steuerung eines Ventils in Hubkolben-Brennkraftmaschinen.The The invention relates to a cam of a camshaft with a cam tip and a base circuit for controlling a valve in reciprocating internal combustion engines.
Eine Nockenwelle ist ein Maschinenelement in Form eines Stabes, auf dem mindestens ein gerundeter Vorsprung angebracht ist. Die Welle dreht sich um die eigene Achse, durch den oder die auf ihr angebrachten Nocken wird diese Drehbewegung wiederholt in eine kurze Längsbewegung umgewandelt. Auf der Nockenwelle von Kolbenmotoren gibt es für jedes Ventil einen exzentrischen Nocken. Der exzentrische Rotationsabschnitt der Nocke, die Nockenspitze, drückt das Ventil in die geöffnete Stellung. Wenn der Nocken weiter gedreht ist, schließt sich das Ventil durch die Ventilfeder. Der Grundkreis ist ein koaxialer Vorsprung mit einem bestimmten Radius auf der Nockenwelle, über den sich die Nockenspitze erhebt. Dieser Radius ist derart ausgestaltet, dass ein Ventil, welches im Bereich des Grundkreises an der Nocke anliegt, geschlossen ist.A Camshaft is a machine element in the form of a rod on which at least one rounded projection is attached. The shaft turns on its own axis, by the one or more attached to it Cam is repeated this rotational movement in a short longitudinal movement transformed. On the camshaft of piston engines there is for each Valve an eccentric cam. The eccentric rotation section the cam, the cam tip, pushes the valve into the open position Position. When the cam continues to turn, close the valve passes through the valve spring. The base circle is a coaxial one Projection with a certain radius on the camshaft, about the cam tip rises. This radius is designed such that a valve which rests on the cam in the region of the base circle, closed is.
Aus
der
Die
günstigen Eigenschaften der Wälzlagerung auch
auf die Nocke der Nockenwelle zu übertragen, ist bereits
aus der
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Nocke der eingangs genannten Art derart auszuführen, dass der Kontakt zwischen Nocke und Ventiltrieb möglichst reibungsarm ist, der mechanische Verschleiß an der Nocke und an dem Ventil verringert wird und eine solche Nocke einfach und mit geringem Kostenaufwand hergestellt werden kann.In front In this background, the invention is based on the object Cam of the type mentioned in such a way that the contact between the cam and the valve train is as low-friction as possible is the mechanical wear on the cam and on the Valve is reduced and such a cam simple and low Cost can be produced.
Diese Aufgabe wird gelöst mit einer Nocke gemäß den Merkmalen des Patentanspruchs 1. Die Unteransprüche betreffen besonders zweckmäßige Weiterbildungen der Erfindung.These Task is solved with a cam according to the Features of claim 1. The dependent claims relate particularly expedient developments of the invention.
Erfindungsgemäß ist also eine Nocke einer Nockenwelle mit einer Nockenspitze und einem Grundkreis zur Steuerung eines Ventils in Hubkolben-Brennkraftmaschinen vorgesehen, bei der der Grundkreis zumindest abschnittsweise durch eine Laufrolle gebildet ist, welche im Bereich der Nocke koaxial auf der Nockenwelle angeordnet ist. Hierdurch ist die Reibung in Ventiltrieben, insbesondere in Verbindung mit Tassenstößeln reduziert, wodurch unerwünschte Schubkräfte auf den Ventiltrieb, insbesondere den Stößel, vermieden werden und der Gleichlauf verbessert wird. Somit können zusätzliche Bauteile wie ein Rollenschlepphebel eingespart werden. So lassen sich insbesondere die Reibungskräfte zwischen der Lauffläche des Nockens und dem Stößel und/oder anderen Ventiltriebsteilen deutlich reduzieren und der mechanische Verschleiß verringern.According to the invention So a cam of a camshaft with a cam tip and a base circle provided for controlling a valve in reciprocating internal combustion engines, in which the base circle at least partially by a roller is formed, which in the region of the cam coaxial on the camshaft is arranged. As a result, the friction in valve trains, in particular in Reduced connection with bucket tappets, eliminating unwanted Shearing forces on the valve train, in particular the plunger, be avoided and the synchronization is improved. Thus, you can saved additional components such as a roller cam follower become. In particular, the frictional forces between the tread of the cam and the plunger and / or other valve train parts significantly reduce and the reduce mechanical wear.
Vorteilhafterweise ist der Außenumfang der Laufrolle identisch mit dem Außenumfang des Grundkreises. Hierdurch ist es möglich, die Reibung zwischen dem Ventiltrieb und der Nocke zu minimieren.advantageously, the outer circumference of the roller is identical to the outer circumference of the base circle. This makes it possible to reduce the friction between to minimize the valve train and the cam.
Bevorzugt weist der Nocken einen Grundkörper mit zumindest einer Gleitfläche auf, wobei der Grundkörper in einem Übergangsbereich zwischen der Gleitfläche und der Laufrolle tangential zum Radius der Laufrolle ausgebildet ist. Durch eine solche konturbündige Ausbildung des Grundkörpers ist es möglich, dass der jeweilige Übergang von den Laufrollen zu der Gleitfläche beziehungsweise von der Gleitfläche zu den Laufrollen nahezu ruck- und/oder impulsfrei erfolgen kann.Prefers the cam has a base body with at least one Sliding surface, wherein the main body in a transition region between the sliding surface and the roller tangential to Radius of the roller is formed. By such a konturbündige Training the main body, it is possible that the respective transition from the rollers to the sliding surface or from the sliding surface to the rollers almost can be done without jerk and / or pulse.
In vorteilhafter Ausgestaltung ist vorgesehen, dass die Laufrolle als gleit- oder wälzgelagerte Rolle ausgebildet ist. Hierdurch ist die Reibung zwischen dem Nocken und dem Ventiltrieb, beispielsweise einem Tassenstößel mit fester Kontaktfläche, reduziert.In advantageous embodiment is provided that the roller as is formed sliding or rolling roller. hereby is the friction between the cam and the valvetrain, for example a bucket tappet with fixed contact surface, reduced.
Vorteilhaft ist es, wenn die Laufrolle einen Außenumfang aufweist, der im Bereich des Grundkreises größer als der Außenumfang des Grundkörpers ist. Hierdurch ist es möglich, dass ausschließlich diese Laufrolle den Ventiltrieb kontaktiert, wenn der Grundkreis des Nockens den Ventiltrieb überstreicht.Advantageous it is when the roller has an outer circumference, in the area of the base circle larger than the Outside circumference of the body is. This is it is possible that only this caster contacted the valvetrain when the base circle of the cam Valve gear sweeps over.
Günstig ist es, dass der Grundkörper Wangen aufweist, die beiderseits der Laufrolle angeordnet sind. Hierdurch ist es möglich die Laufrolle auf einfache Weise sicher in ihrer Lage auf der Nockenwelle zu halten und eine Verschiebung der Laufrolle in Richtung der Achse der Nockenwelle zu verhindern.It is favorable that the base body has cheeks which are arranged on both sides of the roller. This makes it possible to easily keep the roller safely in position on the camshaft and verhin a displacement of the roller in the direction of the axis of the camshaft countries.
Der Grundkörper kann aus mehreren Einzelteilen mit Verbindungselementen zusammengesetzt werden oder in seiner wesentlichen Struktur einteilig ausgebildet sein. Hierdurch ist es möglich, den Verschleiß der Nocke weiter zu reduzieren und die Nocke bei geringer Masse derart auszuführen, dass diese auch höchsten dynamischen Beanspruchungen Stand hält.Of the The basic body can consist of several individual parts with connecting elements be assembled or formed in one piece in its essential structure be. This makes it possible to reduce the wear Nock further reduce and the cam at low mass such that they also have the highest dynamic Withstand stresses.
Günstig ist es, dass die Nockenwelle mittels Wälzlagern gelagert ist. Hierdurch ist es möglich, dass der Ölversorgungsbedarf geringer ist, was zu einer Wirkungsgradsteigerung des Motors führt.Cheap it is that the camshaft is supported by rolling bearings is. This makes it possible that the oil supply requirement is lower, which leads to an increase in efficiency of the engine.
Vorteilhaft ist es, dass in der Nocke zusätzlich zumindest eine Hubrolle, insbesondere in der Nockenspitze, angeordnet ist. Hierdurch ist es möglich, dass die Gleitfläche der Nocke weiter reduziert und somit die Reiblast verringert wird.Advantageous is it that in the cam in addition at least one lifting roller, in particular in the cam tip, is arranged. This is it possible for the sliding surface of the cam to continue reduces and thus the friction load is reduced.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt inThe Invention allows for numerous embodiments. To further clarify its basic principle, one of them is in the drawing and will be described below. These shows in
Die
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 10331089 A1 [0003] - DE 10331089 A1 [0003]
- - DE 19618253 C1 [0004] - DE 19618253 C1 [0004]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007059079A DE102007059079A1 (en) | 2007-12-07 | 2007-12-07 | Cam for camshaft in reciprocating piston internal combustion engine, has base circuit formed by cam roller that is arranged in area of cam coaxial to cam shaft, where roller is formed as sliding supported roller or rolling-supported roller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007059079A DE102007059079A1 (en) | 2007-12-07 | 2007-12-07 | Cam for camshaft in reciprocating piston internal combustion engine, has base circuit formed by cam roller that is arranged in area of cam coaxial to cam shaft, where roller is formed as sliding supported roller or rolling-supported roller |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007059079A1 true DE102007059079A1 (en) | 2009-06-10 |
Family
ID=40621225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007059079A Withdrawn DE102007059079A1 (en) | 2007-12-07 | 2007-12-07 | Cam for camshaft in reciprocating piston internal combustion engine, has base circuit formed by cam roller that is arranged in area of cam coaxial to cam shaft, where roller is formed as sliding supported roller or rolling-supported roller |
Country Status (1)
Country | Link |
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DE (1) | DE102007059079A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010008566A1 (en) | 2010-02-19 | 2011-08-25 | Neumayer Tekfor Holding GmbH, 77756 | Cam for use in camshaft for controlling valve of combustion engine in motor vehicle, has units connected with each other and designed such that cavity is formed between units, where one of units is made of low carbon steel or plastic |
CN102705025A (en) * | 2011-03-28 | 2012-10-03 | 三菱自动车工业株式会社 | Cam structure |
DE102013219663A1 (en) * | 2013-09-30 | 2014-11-27 | Continental Automotive Gmbh | Camshaft for driving a pump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19618253C1 (en) | 1996-05-07 | 1997-08-14 | Henschel Kunststofftechn Gmbh | Cam of camshaft for controlling valve in stroke piston internal combustion engine |
DE10331089A1 (en) | 2003-07-09 | 2005-02-24 | Volkswagen Ag | Cylinder head cover for IC engines with one camshaft has bearing bridge with aperture to completely enclose the camshaft |
-
2007
- 2007-12-07 DE DE102007059079A patent/DE102007059079A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19618253C1 (en) | 1996-05-07 | 1997-08-14 | Henschel Kunststofftechn Gmbh | Cam of camshaft for controlling valve in stroke piston internal combustion engine |
DE10331089A1 (en) | 2003-07-09 | 2005-02-24 | Volkswagen Ag | Cylinder head cover for IC engines with one camshaft has bearing bridge with aperture to completely enclose the camshaft |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010008566A1 (en) | 2010-02-19 | 2011-08-25 | Neumayer Tekfor Holding GmbH, 77756 | Cam for use in camshaft for controlling valve of combustion engine in motor vehicle, has units connected with each other and designed such that cavity is formed between units, where one of units is made of low carbon steel or plastic |
CN102705025A (en) * | 2011-03-28 | 2012-10-03 | 三菱自动车工业株式会社 | Cam structure |
EP2505796A3 (en) * | 2011-03-28 | 2013-02-06 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Cam structure |
CN102705025B (en) * | 2011-03-28 | 2015-03-04 | 三菱自动车工业株式会社 | Cam structure |
DE102013219663A1 (en) * | 2013-09-30 | 2014-11-27 | Continental Automotive Gmbh | Camshaft for driving a pump |
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Legal Events
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OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
R005 | Application deemed withdrawn due to failure to request examination | ||
R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20141209 |