EP1350931B1 - Camshaft - Google Patents
Camshaft Download PDFInfo
- Publication number
- EP1350931B1 EP1350931B1 EP20020100330 EP02100330A EP1350931B1 EP 1350931 B1 EP1350931 B1 EP 1350931B1 EP 20020100330 EP20020100330 EP 20020100330 EP 02100330 A EP02100330 A EP 02100330A EP 1350931 B1 EP1350931 B1 EP 1350931B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- bearing
- lubricant
- bearing surface
- arrangement according
- 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.)
- Expired - Lifetime
Links
- 239000000314 lubricant Substances 0.000 claims description 33
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution 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
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/103—Lubrication of valve gear or auxiliaries of valve stem and guide
Definitions
- the invention relates to a camshaft arrangement with a camshaft and at least one camshaft bearing, which has a lubricant channel with an outlet opening on the bearing surface of the camshaft bearing.
- Camshafts are used in particular to control the valves of an internal combustion engine, i. to open or close at a rotation of the camshaft by cam.
- a camshaft is usually rotatably supported in camshaft bearings, which often consist of a camshaft bearing base and a camshaft bearing cap.
- camshaft bearings which often consist of a camshaft bearing base and a camshaft bearing cap.
- an oil channel is formed in the camshaft bearing base, which leads to the bearing surface.
- a groove extending over approximately 85 ° in the direction of rotation is provided in the corresponding bearing surface of the camshaft. This is periodically opposite the outlet opening of the lubricant channel upon rotation of the camshaft and thereby ensures an intermittent transmission of the pressurized lubricant.
- the lubricant is thereby returned via the groove of the camshaft in a channel system in the camshaft bearing, from where the lubricant is sprayed or distributed in the axial direction of the camshaft to lub
- the camshaft assembly includes at least one camshaft and at least one camshaft bearing, in which the camshaft is rotatably mounted.
- the camshaft bearing has a lubricant passage extending through the camshaft bearing, the outlet opening of which is located on the bearing surface of the camshaft bearing, which by definition is in contact with the camshaft.
- a lubricant - in particular oil - are supplied.
- the arrangement is characterized in that in the bearing surface of the camshaft bearing corresponding bearing surface of the camshaft, at least one axially extending groove is present, which is opposite to the outlet opening of the lubricant channel with a corresponding angular position of the camshaft and therefore communicates with this, and an opening in the area outside the bearing surface has.
- the camshaft bearing is constantly and sufficiently lubricated via the outlet opening of the lubricant channel.
- an intermittently occurring with the rotation of the camshaft distribution of lubricant is achieved in the axial direction, since at a corresponding angular position of the camshaft, the lubricant from the lubricant passage into the groove of the camshaft and can escape from this in the lying outside the storage area area.
- the groove in the camshaft and its outlet in this case takes place a splattering or distribution of the lubricant, since this is under pressure and is also thrown by the rotation of the camshaft.
- the lubricant can in this way on a reach a trajectory further away from the camshaft bearing parts and provide for their lubrication. At the same time it is ensured by the intermittent held contact of groove and lubricant channel that in this way only limited amounts of lubricant are distributed and that between two injection processes a sufficiently high lubricant pressure is maintained for the lubrication of the camshaft bearing.
- the camshaft has two grooves extending in opposite axial directions in the bearing surface.
- the grooves each communicate in the manner described above at a corresponding angular position of the camshaft with the outlet opening of the lubricant channel and differ in that their outlets point to different sides outside the bearing surface. Due to the two grooves, the intermittent splashing of lubricant can therefore take place in two opposite axial directions.
- the camshaft bearing is preferably constructed in two parts from a camshaft bearing base and a camshaft bearing cap connected thereto. This facilitates the assembly of the camshaft.
- the camshaft has cams for actuating the valves of cylinders of an internal combustion engine, wherein the number of camshaft bearings is smaller than the number of cylinders of the internal combustion engine. That is, unlike known camshaft assemblies, there is not one camshaft bearing per cylinder for each camshaft, but a smaller number of camshaft bearings are provided. This results in corresponding cost savings. These are possible because in the embodiment according to the invention, a distribution of lubricant over larger axial distances is possible, so that even further away from a camshaft bearing components are sufficiently lubricated.
- a camshaft bearing of the embodiment according to the invention can be arranged for every second cylinder.
- the valve mechanisms and cams located between two such bearings are then sufficiently lubricated by the lubricant intermittently spattered by the bearings.
- a respective camshaft bearing can be removed between two (complete) camshaft bearings.
- FIG. 1 shows a plan view of a camshaft arrangement with two parallel, overhead camshafts 1a, 1b.
- camshafts 1a, 1b (not shown) for each cylinder of an internal combustion engine, two cams 3 are arranged, which actuate a respective valve stem 2.
- a camshaft bearing 4, 5, 6, 7, 8 is provided, which consists of a camshaft bearing base and a camshaft bearing cap in a manner not shown.
- camshaft assembly is relatively agile and expensive. According to the invention it is therefore proposed to dispense with every second camshaft bearing 5, 7 completely or at least on the associated camshaft bearing cap, which is indicated in Figure 1 by a dashed representation of this camp.
- the design of the remaining camshaft bearings 4, 6, 8 (with camshaft bearing cap) shown in greater detail in FIG. 2 is proposed.
- the solution consists essentially in forming in the camshaft 1a (or analogously in the camshaft 1b) extending in the axial direction slots or grooves 10a, 10b. These communicate with the outlet opening of the lubricant channel 9 in the camshaft bearing 4, 6, 8, when the camshaft 1 a is rotated in the corresponding angular position. Further, the grooves 10a, 10b end in the axial direction on opposite sides outside the bearing surface of the camshaft bearing.
- FIG. 3 shows the groove 10a in a cross section along the line III-III through the camshaft 1a.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Die Erfindung betrifft eine Nockenwellenanordnung mit einer Nockenwelle und mindestens einem Nockenwellenlager, das einen Schmiermittelkanal mit einer Austrittsöffnung an der Lagerfläche des Nockenwellenlagers aufweist.The invention relates to a camshaft arrangement with a camshaft and at least one camshaft bearing, which has a lubricant channel with an outlet opening on the bearing surface of the camshaft bearing.
Nockenwellen werden insbesondere dazu verwendet, die Ventile einer Brennkraftmaschine anzusteuern, d.h. bei einer Drehung der Nockenwelle durch Nocken zu öffnen beziehungsweise zu schließen. Eine Nockenwelle ist in der Regel in Nockenwellenlagern drehbeweglich gelagert, welche häufig aus einer Nockenwellenlager-Basis und einer Nockenwellenlager-Kappe bestehen. Bei einer aus der US 4 258 673 bekannten Ausführungsform ist in der Nockenwellenlager-Basis ein Ölkanal ausgebildet, welcher zur Lagerfläche führt. Weiterhin ist in der korrespondierenden Lagerfläche der Nockenwelle eine über ca. 85° in Umlaufrichtung verlaufende Nut vorgesehen. Diese liegt bei Drehung der Nockenwelle periodisch der Austrittsöffnung des Schmiermittelkanals gegenüber und sorgt hierdurch für eine intermittierende Weiterleitung des unter Druck stehenden Schmiermittels. Das Schmiermittel wird dabei über die Nut der Nockenwelle in ein Kanalsystem im Nockenwellenlager zurückgeleitet, von wo aus das Schmiermittel in Axialrichtung der Nockenwelle verspritzt bzw. verteilt wird, um die benachbarten Nocken zu schmieren.Camshafts are used in particular to control the valves of an internal combustion engine, i. to open or close at a rotation of the camshaft by cam. A camshaft is usually rotatably supported in camshaft bearings, which often consist of a camshaft bearing base and a camshaft bearing cap. In an embodiment known from
Bei der vorstehend erläuterten sowie bei ähnlichen Nockenwellenanordnungen befindet sich bei jedem zu einem Zylinder gehörenden Satz von Nocken auch ein Nockenwellenlager, über welches eine Schmierung der Nocken sowie - bei obenliegenden Nockenwellen durch ablaufendes Schmiermittel - der zugehörigen Ventilstößel erfolgt.In the above-explained as well as in similar camshaft arrangements is in each belonging to a cylinder set of cams and a camshaft bearing, via which a lubrication of the cam and - in the overhead camshafts by running lubricant - the associated valve tappet takes place.
Vor diesem Hintergrund war es Aufgabe der vorliegenden Erfindung, einen einfacheren Aufbau einer Nockenwellenanordnung bereitzustellen, welcher eine gute Schmierung der beweglichen Elemente gewährleistet.Against this background, it was an object of the present invention to provide a simpler structure of a camshaft assembly, which ensures a good lubrication of the movable elements.
Diese Aufgabe wird durch eine Nockenwellenanordnung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a camshaft arrangement with the features of claim 1.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen enthalten.Advantageous embodiments are contained in the subclaims.
Die erfindungsgemäße Nockenwellenanordnung enthält mindestens eine Nokkenwelle und mindestens ein Nockenwellenlager, in welchem die Nockenwelle drehbar gelagert ist. Das Nockenwellenlager weist einen durch das Nockenwellenlager verlaufenden Schmiermittelkanal auf, dessen Austrittsöffnung an der Lagerfläche des Nockenwellenlagers liegt, die definitionsgemäß in Kontakt mit der Nokkenwelle steht. Über den Schmiermittelkanal kann den Lagerflächen ein Schmiermittel - insbesondere Öl - zugeführt werden. Die Anordnung ist dadurch gekennzeichnet, daß in der zur Lagerfläche des Nockenwellenlagers korrespondierenden Lagerfläche der Nockenwelle mindestens eine axial verlaufende Nut vorhanden ist, welche bei entsprechender Winkelstellung der Nockenwelle der Austrittsöffnung des Schmiermittelkanals gegenüberliegt und daher mit dieser kommuniziert, und die eine Öffnung in den Bereich außerhalb der Lagerfläche aufweist.The camshaft assembly according to the invention includes at least one camshaft and at least one camshaft bearing, in which the camshaft is rotatably mounted. The camshaft bearing has a lubricant passage extending through the camshaft bearing, the outlet opening of which is located on the bearing surface of the camshaft bearing, which by definition is in contact with the camshaft. About the lubricant channel, the bearing surfaces, a lubricant - in particular oil - are supplied. The arrangement is characterized in that in the bearing surface of the camshaft bearing corresponding bearing surface of the camshaft, at least one axially extending groove is present, which is opposite to the outlet opening of the lubricant channel with a corresponding angular position of the camshaft and therefore communicates with this, and an opening in the area outside the bearing surface has.
Bei der beschriebenen Anordnung wird das Nockenwellenlager über die Austrittsöffnung des Schmiermittelkanals ständig und in ausreichender Weise geschmiert. Zusätzlich wird jedoch eine mit der Drehung der Nockenwelle intermittierend auf tretende Verteilung von Schmiermittel in axialer Richtung erreicht, da bei einer entsprechenden Winkelstellung der Nockenwelle das Schmiermittel vom Schmiermittelkanal in die Nut der Nockenwelle übertreten und von dieser in den außerhalb der Lagerfläche liegenden Bereich austreten kann. Bei entsprechender geometrischer Ausgestaltung des Schmiermittelkanals, der Nut in der Nockenwelle sowie ihres Auslasses findet hierbei ein Verspritzen bzw. Verteilen des Schmiermittels statt, da dieses unter Druck steht und zusätzlich durch die Drehung der Nockenwelle geschleudert wird. Das Schmiermittel kann auf diese Weise auf einer einer Flugbahn weiter entfernt vom Nockenwellenlager gelegene Teile erreichen und für deren Schmierung sorgen. Gleichzeitig ist durch den nur intermittierend stattfindenden Kontakt von Nut und Schmiermittelkanal sichergestellt, daß auf diese Weise nur begrenzte Mengen an Schmiermittel verteilt werden und daß zwischen zwei Spritzvorgängen ein ausreichend hoher Schmiermitteldruck für die Schmierung des Nockenwellenlagers erhalten bleibt.In the described arrangement, the camshaft bearing is constantly and sufficiently lubricated via the outlet opening of the lubricant channel. In addition, however, an intermittently occurring with the rotation of the camshaft distribution of lubricant is achieved in the axial direction, since at a corresponding angular position of the camshaft, the lubricant from the lubricant passage into the groove of the camshaft and can escape from this in the lying outside the storage area area. With a corresponding geometric design of the lubricant channel, the groove in the camshaft and its outlet in this case takes place a splattering or distribution of the lubricant, since this is under pressure and is also thrown by the rotation of the camshaft. The lubricant can in this way on a reach a trajectory further away from the camshaft bearing parts and provide for their lubrication. At the same time it is ensured by the intermittent held contact of groove and lubricant channel that in this way only limited amounts of lubricant are distributed and that between two injection processes a sufficiently high lubricant pressure is maintained for the lubrication of the camshaft bearing.
Gemäß einer bevorzugten Ausgestaltung weist die Nockenwelle zwei in entgegengesetzte axiale Richtungen verlaufende Nuten in der Lagerfläche auf. Die Nuten kommunizieren jeweils in der vorstehend beschriebenen Weise bei einer entsprechenden Winkelstellung der Nockenwelle mit der Austrittsöffnung des Schmiermittelkanals und unterscheiden sich dadurch, daß ihre Auslässe zu verschiedenen Seiten außerhalb der Lagerfläche weisen. Durch die zwei Nuten kann das intermittierende Verspritzen von Schmiermittel daher in zwei entgegengesetzte axiale Richtungen erfolgen.According to a preferred embodiment, the camshaft has two grooves extending in opposite axial directions in the bearing surface. The grooves each communicate in the manner described above at a corresponding angular position of the camshaft with the outlet opening of the lubricant channel and differ in that their outlets point to different sides outside the bearing surface. Due to the two grooves, the intermittent splashing of lubricant can therefore take place in two opposite axial directions.
Das Nockenwellenlager ist vorzugsweise zweiteilig aufgebaut aus einer Nockenwellenlager-Basis und einer hiermit verbundenen Nockenwellenlager-Kappe. Dies erleichtert die Montage der Nockenwelle.The camshaft bearing is preferably constructed in two parts from a camshaft bearing base and a camshaft bearing cap connected thereto. This facilitates the assembly of the camshaft.
Gemäß einer anderen Weiterbildung der Nockenwellenanordnung weist die Nokkenwelle Nocken zur Betätigung der Ventile von Zylindern einer Brennkraftmaschine auf, wobei die Anzahl der Nockenwellenlager kleiner ist als die Anzahl der Zylinder der Brennkraftmaschine. Das bedeutet, daß anders als bei bekannten Nockenwellenanordnungen nicht für jede Nockenwelle pro Zylinder ein Nockenwellenlager vorhanden ist, sondern daß eine kleinere Anzahl von Nockenwellenlagern vorgesehen wird. Hierdurch ergeben sich entsprechende Kosteneinsparungen. Diese sind möglich, da bei der erfindungsgemäßen Ausgestaltung eine Verteilung von Schmiermittel über größere axiale Strecken möglich ist, so daß auch weiter entfernt von einem Nockenwellenlager liegende Bauteile ausreichend geschmiert werden.According to another development of the camshaft arrangement, the camshaft has cams for actuating the valves of cylinders of an internal combustion engine, wherein the number of camshaft bearings is smaller than the number of cylinders of the internal combustion engine. That is, unlike known camshaft assemblies, there is not one camshaft bearing per cylinder for each camshaft, but a smaller number of camshaft bearings are provided. This results in corresponding cost savings. These are possible because in the embodiment according to the invention, a distribution of lubricant over larger axial distances is possible, so that even further away from a camshaft bearing components are sufficiently lubricated.
Insbesondere kann dabei in Axialrichtung der Nockenwelle gesehen bei jedem zweiten Zylinder ein Nockenwellenlager der erfindungsgemäßen Ausgestaltung angeordnet sein. Die zwischen zwei solchen Lagern gelegenen Ventilmechanismen und Nocken werden dann durch das von den Lagern intermittierend verspritzte Schmiermittel ausreichend geschmiert.In particular, in the axial direction of the camshaft, a camshaft bearing of the embodiment according to the invention can be arranged for every second cylinder. The valve mechanisms and cams located between two such bearings are then sufficiently lubricated by the lubricant intermittently spattered by the bearings.
In weiterer Ausgestaltung der Nockenwellenanordnung kann zwischen zwei (vollständigen) Nockenwellenlagern jeweils ein Nockenwellenlager entfernt werden.In a further embodiment of the camshaft arrangement, a respective camshaft bearing can be removed between two (complete) camshaft bearings.
Die Erfindung wird nachfolgend mit Hilfe der Figuren beispielhaft näher erläutert. Es zeigen:
- Fig. 1
- eine Aufsicht auf eine Nockenwellenanordnung mit zwei parallelen, obenliegenden Nockenwellen,
- Fig. 2
- einen Schnitt entlang einer Nockenwelle gemäß Figur 1 mit einem vergrößerten Ausschnitt aus einem erfindungsgemäß ausgestalteten Nockenwellenlager, und
- Fig. 3
- einen Schnitt entlang der Linie III-III von
Figur 2 durch eine erfindungsgemäß mit einer Nut versehene Nockenwelle.
- Fig. 1
- a plan view of a camshaft arrangement with two parallel, overhead camshafts,
- Fig. 2
- a section along a camshaft according to Figure 1 with an enlarged section of a inventively designed camshaft bearing, and
- Fig. 3
- a section along the line III-III of Figure 2 by a present invention provided with a groove camshaft.
In Figur 1 ist eine Aufsicht auf eine Nockenwellenanordnung mit zwei parallelen, obenliegenden Nockenwellen 1a, 1b dargestellt. An den Nockenwellen 1a, 1b sind für jeden Zylinder einer Brennkraftmaschine (nicht dargestellt) zwei Nocken 3 angeordnet, welche jeweils einen Ventilstößel 2 betätigen. Zwischen zwei einem Zylinder zugeordneten Nocken 3 ist ein Nockenwellenlager 4, 5, 6, 7, 8 vorgesehen, welches in nicht näher dargestellter Weise aus einer Nockenwellenlager-Basis und einer Nockenwellenlager-Kappe besteht. Die Ölversorgung der Ventilstößel 2 erfolgt über Schmieröl, das aus den Nockenwellenlagern austritt und links und rechts hiervon zu den darunter gelegenen Ventilstößeln fließt.FIG. 1 shows a plan view of a camshaft arrangement with two parallel,
Der beschriebene Aufbau einer Nockenwellenanordnung ist verhältnismäßig auf wendig und teuer. Erfindungsgemäß wird daher vorgeschlagen, auf jedes zweite Nockenwellenlager 5, 7 komplett beziehungsweise zumindest auf die zugehörige Nockenwellenlager-Kappe zu verzichten, was in Figur 1 durch eine gestrichelte Darstellung dieser Lager angedeutet ist.The described construction of a camshaft assembly is relatively agile and expensive. According to the invention it is therefore proposed to dispense with every second camshaft bearing 5, 7 completely or at least on the associated camshaft bearing cap, which is indicated in Figure 1 by a dashed representation of this camp.
Bei einem Weglassen der Nockenwellenlager-Kappen tritt jedoch das Problem auf, daß hierdurch der Öldruck des entsprechenden Schmiermittelkanals im Nokkenwellenlager freigegeben wird, welcher zuvor von der Lagerkappe reduziert wurde. Andererseits ist es nicht möglich, den Austritt des Schmiermittelkanals zu verschließen, da sonst die Ölversorgung der links und rechts des Lagers gelegenen Ventilstößel abgeschnitten wäre.In omitting the camshaft bearing caps, however, the problem arises that thereby the oil pressure of the corresponding lubricant channel is released in the camshaft bearing, which was previously reduced by the bearing cap. On the other hand, it is not possible to close the outlet of the lubricant channel, otherwise the oil supply of the left and right of the bearing located valve stem would be cut off.
Um dennoch den Kostenvorteil eines Weglassens der Nockenwellenlager 5, 7 erzielen zu können, wird erfindungsgemäß der in Figur 2 detaillierter dargestellte Aufbau der übrigen Nockenwellenlager 4, 6, 8 (mit Nockenwellenlager-Kappe) vorgeschlagen. Die Lösung besteht im Wesentlichen darin, in der Nockenwelle 1a (bzw. analog in der Nockenwelle 1b) in Axialrichtung verlaufende Schlitze oder Nuten 10a, 10b auszubilden. Diese kommunizieren mit der Austrittsöffnung des Schmiermittelkanals 9 im Nockenwellenlager 4, 6, 8, wenn die Nockenwelle 1a in die entsprechende Winkelstellung gedreht ist. Ferner enden die Nuten 10a, 10b in Axialrichtung an gegenüberliegenden Seiten außerhalb der Lagerfläche des Nokkenwellenlagers.In order nevertheless to be able to achieve the cost advantage of omitting the
Wenn die Nockenwelle 1a sich in einer Winkelstellung befindet, in welcher die Nuten 10a, 10b der Austrittsöffnung des Schmiermittelkanals 9 gegenüberliegen, kann das dort unter Druck anstehende Schmiermittel in die Nuten übertreten und diese füllen. Anschließend verläßt das Schmiermittel die Nuten 10a, 10b wieder im Raum außerhalb der Lagers. Auf diese Weise werden intermittierend Tropfen des Schmiermittels in Axialrichtung geschleudert, welche auch weiter entfernt liegende Elemente wie insbesondere Ventilstößel 2 erreichen. Dies erlaubt es, gemäß Figur 1 jede zweite Lageranordnung 5, 7 wegzulassen, da die dort befindlichen Ventilstößel ausreichend durch das von den übrigen Nockenwellenlagern 4, 6 und 8 intermittierend verspritzte Schmieröl geschmiert werden.When the camshaft 1a is in an angular position in which the
Wie Figur 2 weiterhin zu entnehmen ist, sind in der Nockenwelle 1a vorzugsweise zwei in entgegengesetzte Richtungen verlaufende und miteinander nicht verbundene Nuten 10a, 10b vorgesehen. Figur 3 zeigt die Nut 10a in einem Querschnitt entlang der Linie III-III durch die Nockenwelle 1a.As can be seen further from FIG. 2, preferably two
Claims (6)
- Camshaft arrangement with a camshaft (1a, 1b) and with at least one camshaft bearing (4, 6, 8) which has a lubricant duct (9) with an outflow orifice on the bearing surface of the camshaft bearing, characterized in that, in the corresponding bearing surface of the camshaft, at least one axially running groove (10a, 10b) is provided, which, in a corresponding angular position of the camshaft, communicates with the outflow orifice of the lubricant duct (9) and which has an outlet into the region outside the bearing surface.
- Camshaft arrangement according to Claim 1, characterized in that at least two grooves (10a, 10b) are formed in the bearing surface of the camshaft (1a) and differ from one another in that their outlets point to regions on different sides outside the bearing surface.
- Camshaft arrangement according to Claim 1 or 2, characterized in that the camshaft bearing has a camshaft bearing base and a camshaft bearing cap.
- Camshaft arrangement according to at least one of Claims 1 to 3, characterized in that the camshaft (1a, 1b) has cams (3) for actuating the valves (2) of cylinders of an internal combustion engine, the number of camshaft bearings being smaller than the number of cylinders.
- Camshaft arrangement according to Claim 4, characterized in that a camshaft bearing (4, 6, 8) is arranged for every second cylinder, as seen in the axial direction of the camshaft (1a, 1b).
- Camshaft arrangement according to Claim 3, characterized in that at least one camshaft base (5, 7) without a camshaft bearing cap is arranged between two camshaft bearings (4, 6, 8).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20020100330 EP1350931B1 (en) | 2002-04-02 | 2002-04-02 | Camshaft |
| DE50206884T DE50206884D1 (en) | 2002-04-02 | 2002-04-02 | camshaft arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20020100330 EP1350931B1 (en) | 2002-04-02 | 2002-04-02 | Camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1350931A1 EP1350931A1 (en) | 2003-10-08 |
| EP1350931B1 true EP1350931B1 (en) | 2006-05-24 |
Family
ID=27838129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20020100330 Expired - Lifetime EP1350931B1 (en) | 2002-04-02 | 2002-04-02 | Camshaft |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1350931B1 (en) |
| DE (1) | DE50206884D1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1813784B1 (en) * | 2004-11-19 | 2011-10-19 | Yamaha Hatsudoki Kabushiki Kaisha | Engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB171408A (en) * | 1920-11-12 | 1922-06-29 | Childe Harold Wills | Oil feeding means |
| DE2353736C2 (en) * | 1973-10-26 | 1982-09-09 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Device for lubricating the cams of camshafts in internal combustion engines |
| DE2753752C2 (en) * | 1977-12-02 | 1984-06-07 | Bayerische Motoren Werke AG, 8000 München | Lubricating device for the cams of camshafts, in particular in internal combustion engines |
| US4258673A (en) * | 1979-04-02 | 1981-03-31 | Chrysler Corporation | Cam lubrication |
| US5186129A (en) * | 1992-03-30 | 1993-02-16 | Ford Motor Company | Intermittent oiling system for an internal combustion engine camshaft and valve train |
| DE19615234C1 (en) * | 1996-04-18 | 1997-07-03 | Daimler Benz Ag | Cylinder head for multi-cylinder internal combustion engine |
| JP2000073731A (en) * | 1998-09-03 | 2000-03-07 | Toyota Motor Corp | Camshaft bearing structure of internal combustion engine |
-
2002
- 2002-04-02 DE DE50206884T patent/DE50206884D1/en not_active Expired - Lifetime
- 2002-04-02 EP EP20020100330 patent/EP1350931B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1350931A1 (en) | 2003-10-08 |
| DE50206884D1 (en) | 2006-06-29 |
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