EP0744531A1 - Cylinder head for an internal combustion engine - Google Patents

Cylinder head for an internal combustion engine Download PDF

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Publication number
EP0744531A1
EP0744531A1 EP95107784A EP95107784A EP0744531A1 EP 0744531 A1 EP0744531 A1 EP 0744531A1 EP 95107784 A EP95107784 A EP 95107784A EP 95107784 A EP95107784 A EP 95107784A EP 0744531 A1 EP0744531 A1 EP 0744531A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
main oil
bores
pipelines
camshafts
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.)
Granted
Application number
EP95107784A
Other languages
German (de)
French (fr)
Other versions
EP0744531B1 (en
Inventor
Winfried Krebs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Dr Ing HCF Porsche AG
Renault SAS
Regie Nationale des Usines Renault
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG, Renault SAS, Regie Nationale des Usines Renault filed Critical Dr Ing HCF Porsche AG
Priority to DE59504986T priority Critical patent/DE59504986D1/en
Priority to EP95107784A priority patent/EP0744531B1/en
Priority to JP11935296A priority patent/JP3889830B2/en
Priority to KR1019960017145A priority patent/KR100405587B1/en
Publication of EP0744531A1 publication Critical patent/EP0744531A1/en
Application granted granted Critical
Publication of EP0744531B1 publication Critical patent/EP0744531B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • 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
    • F01M9/107—Lubrication of valve gear or auxiliaries of rocker shaft bearings
    • 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
    • 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
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • 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
    • F01L2001/0476—Camshaft bearings
    • 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
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the invention relates to a cylinder head for an internal combustion engine according to the preamble of the main claim.
  • Such a cylinder head is known for example from DE 34 36 426 C2.
  • the camshaft bearings and the rocker arm bearings are supplied via main oil channels that run parallel to the camshafts.
  • Each of the two camshafts and the associated rocker arms are supplied by a main oil channel.
  • the two main oil passages run in the central area of the cylinder head.
  • This cylinder head has a central, cast block, which has, among other things, receiving openings for the spark plugs.
  • the main oil channels are designed as through holes.
  • the cylinder head can be made lighter again, since the relatively small wall thicknesses can save considerable mass compared to training as a drilled casting. In addition, there is no need for complex drilling over the entire longitudinal extent of the cylinder head (hole length) with the associated difficulties.
  • crosspieces for receiving the pipelines of the main oil channels simultaneously accommodate the lower bearing area of the camshaft bearing.
  • the pipelines By guiding the pipelines in crossbars, the pipelines can be guided at a short distance from the outer walls and at the same time serve as storage for the lever elements of the valve actuation.
  • the bearing points of the lever elements (rocker arms) are supplied directly through holes in the pipeline.
  • the cylinder head housing 1 is connected via two rows of cylinder head screw connections 2 to a cylinder crankcase 3 in an open-deck construction and is closed by a cover 4 on its upper side.
  • Two parallel camshafts are mounted in the cylinder head housing 1, an intake camshaft 5 and an exhaust camshaft 6.
  • Each of the two camshafts 5, 6 actuates eight intake valves 8 and eight exhaust valves 9 via rocker arms 7.
  • Two intake valves and two exhaust valves are assigned to each cylinder of the internal combustion engine, which are guided in valve guides 10 and 11.
  • the two camshafts 5, 6 are mounted on the one hand in bearings 12 in the area of the left end wall 13.
  • Two further bearing points 14 and 15 are formed in transverse webs 16, 17 which are arranged in the region of the second and fourth cylinders and are connected to the outer wall 18 and 19, respectively.
  • the lower halves of the bearing bores 20 are formed in the crosspieces 16 and 17.
  • the upper part of the bearing bore is formed in bearing caps 21 which are screwed onto the crossbars 16 and 17, respectively.
  • the rocker arms are in this embodiment as Roller rocker arm formed and mounted on an axis 22 which runs parallel to the respective camshaft 5 or 6 and is designed as a tube. This tube 22 extends over the entire inner length of the cylinder head housing 1 and is guided in bores 23 of the transverse webs 14 and 15.
  • the tube 22 is further guided in bores 24, which are introduced into transverse webs 25, which are arranged in the region of the cylinders 1 and 3 and are likewise connected to the respective outer wall 18 and 19, respectively.
  • the axes or tubes 22 are guided and sealed in blind bores 26 and 27.
  • the bores 23, 24, 26 and 27 are made from the right end wall 28.
  • Corresponding bores 29, 30 are formed in the right end wall 28, which are provided with threads 31, 32 in the region of their outward-facing opening.
  • the axles or tubes 22 are inserted into the cylinder head housing 1 through the bores 29 and 30.
  • the roller rocker arms 7 are then placed on and the axles are pushed through the bores 23 and 24 until they are inserted into the blind bores 26 and 27.
  • the axles or tubes 22 are secured and closed.
  • the tubes 22 are used in the operation of the internal combustion engine to supply oil to the bearings 12, 14 and 15 of the camshafts 5 and 6.
  • the tubes 22 are provided in the area of the transverse webs 16 and 17 and in the area of the bearings 12 with radial openings 33, of which channels 34 go out to bearings 12, 14 and 15.
  • the two annular spaces 36 and 37 are connected to one another via this transverse bore 39.
  • Oblique bores 41, 42 which each run in the transverse web 35, open into the annular spaces 36 and 37, respectively. These are introduced from the top of the cylinder head housing 1 and cut the bores 43 for guiding the tubes 22.
  • the tubes 22 are provided on their lower side with radial openings 44 which are connected to the oblique bores 41 and 42, respectively. Via these radial openings 44, the interior 45 of the pipes is connected to the lower part of the oblique bores and thus to the oil supply.
  • the upper part of the oblique bores 41, 42 is sealed by the tube 22, so that no lubricant can escape.
  • this is provided with further radial openings, not shown, via which the bearing of the roller finger followers 7 on the axis 22 is supplied with lubricant.

Abstract

The cylinder head has main oil passages (22) which run in the region of the outer wall (18,19) of the cylinder head housing. The main passages are connected to the annular spaces of the cylinder heads by drillings (41) led in from the upper side of the cylinder head housing (1). The main oil passages are formed as pipes which are guided in bores running parallel to the camshafts and which are built into transverse webs (16,17,25,35) connected to one of the outer walls.

Description

Die Erfindung geht aus von einem Zylinderkopf für eine Brennkraftmaschine nach der Gattung des Hauptanspruches.The invention relates to a cylinder head for an internal combustion engine according to the preamble of the main claim.

Ein derartiger Zylinderkopf ist beispielsweise aus der DE 34 36 426 C2 bekannt. Die Versorgung der Lagerstellen der Nockenwelle und der Lagerung der Schlepphebel erfolgt über Hauptölkanäle, die parallel zu den Nockenwellen verlaufen. Jede der beiden Nockenwellen sowie die zugeordneten Schlepphebel werden von einem Hauptölkanal versorgt. Die beiden Hauptölkanäle verlaufen im mittleren Bereich des Zylinderkopfes. Dieser Zylinderkopf hat einen mittleren, gegossenen Block, der unter anderem Aufnahmeöffnungen für die Zündkerzen aufweist. In diesem längsverlaufenden Block sind die Hauptölkanäle als durchgehende Bohrungen ausgeführt. Die Ölführung in einem derartigen mittleren Block des Zylinderkopfes führt zu sehr beengten Einbauverhältnissen, die unter anderem eine Verschiebung der Zylinderkopfverschraubung nach außen erfordern, so daß eine gute Zugänglichkeit der Zylinderkopfverschraubung aufgrund der Überdeckung durch die Nockenwellen nicht gegeben ist. Darüber hinaus ist ein derartiger Zylinderkopf aufgrund der aufwendigen Ausbildung des mittleren Blockes relativ schwer. Weiterhin führt die Ausbildung eines nachträglich zu durchbohrenden mittleren Blockes aufgrund der einzuhaltenden Mindestwandstärken unter Umständen zu Problemen beim Ausformen des Rohlings.Such a cylinder head is known for example from DE 34 36 426 C2. The camshaft bearings and the rocker arm bearings are supplied via main oil channels that run parallel to the camshafts. Each of the two camshafts and the associated rocker arms are supplied by a main oil channel. The two main oil passages run in the central area of the cylinder head. This cylinder head has a central, cast block, which has, among other things, receiving openings for the spark plugs. In this longitudinal block, the main oil channels are designed as through holes. The oil flow in such a central block of the cylinder head leads to very cramped installation conditions, which, among other things, require a displacement of the cylinder head screw connection to the outside, so that the cylinder head screw connection is not easily accessible due to the overlap by the camshafts. In addition, such a cylinder head is relatively heavy due to the complex design of the middle block. Furthermore, the formation of a middle block to be subsequently drilled may lead to problems when shaping the blank due to the minimum wall thicknesses to be observed.

Demgegenüber ist es Aufgabe der Erfindung, einen Zylinderkopf für eine Brennkraftmaschine nach der Gattung des Hauptanspruches so weiterzubilden, daß dieser einfach aufgebaut, einfach zu fertigen und einfach zu bearbeiten ist. Darüber hinaus soll der innere Bereich des Zylinderkopfes weitgehend frei von Einbauten sein.In contrast, it is an object of the invention to develop a cylinder head for an internal combustion engine according to the preamble of the main claim so that it is simple in construction, easy to manufacture and easy to machine. In addition, the inner area of the cylinder head should be largely free of internals.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Hauptanspruches gelöst. Die Verlegung der Hauptölkanäle zur Versorgung der Lagerstellen der Nockenwelle und der Hebelelemente nach außen in den Bereich der Außenwände macht den Innenraum des Zylinderkopfes zumindest frei von Einbauten für die Ölführung. Dadurch wird der Zylinderkopf insgesamt leichter und gußtechnisch einfacher zu beherrschen. Dadurch, daß die Verbindung der Hauptölkanäle zu den Ringkanälen der Zylinderkopfverschraubung durch schräg verlaufende Bohrungen erfolgt, die von oben zugänglich bzw. eingebracht sind, ergibt sich ein einfach zu handhabender Fertigungsschritt, bei dem darüber hinaus die Bohrungslänge relativ kurz gehalten wird.This object is achieved with the characterizing features of the main claim. The routing of the main oil passages to supply the bearing points of the camshaft and the lever elements to the outside in the area of the outer walls makes the interior of the cylinder head at least free from internals for the oil guide. This makes the cylinder head lighter overall and easier to master in terms of casting technology. The fact that the connection of the main oil passages to the ring passages of the cylinder head screw connection takes place through obliquely running bores which are accessible or introduced from above results in an easy-to-use manufacturing step in which the bore length is also kept relatively short.

Durch Nutzung von Rohrleitungen für die Hauptölkanäle kann der Zylinderkopf noch einmal leichter ausgebildet werden, da durch die relativ geringen Wandstärken gegenüber einer Ausbildung als aufgebohrtes Gußteil erheblich Masse eingespart werden kann. Darüber hinaus kann auf das aufwendige Bohren über die gesamte Längserstreckung des Zylinderkopfes (Bohrlochlänge) mit den damit verbundenen Schwierigkeiten verzichtet werden.By using pipelines for the main oil passages, the cylinder head can be made lighter again, since the relatively small wall thicknesses can save considerable mass compared to training as a drilled casting. In addition, there is no need for complex drilling over the entire longitudinal extent of the cylinder head (hole length) with the associated difficulties.

Werden die Rohrleitungen in Querstegen geführt, die mit einer der Außenwände verbunden sind, brauchen nur die Querstege selbst in Längsrichtung des Zylinderkopfes durchbohrt werden. Die einzubringende Bohrlochlänge reduziert sich damit auf ein Minimum.If the pipes are guided in crosspieces that are connected to one of the outer walls, only the crosspieces themselves need to be drilled through in the longitudinal direction of the cylinder head. The borehole length to be introduced is thus reduced to a minimum.

Besonders vorteilhaft ist es, wenn die Querstege zur Aufnahme der Rohrleitungen der Hauptölkanäle gleichzeitig den unteren Lagerbereich der Nockenwellenlagerung aufnehmen.It is particularly advantageous if the crosspieces for receiving the pipelines of the main oil channels simultaneously accommodate the lower bearing area of the camshaft bearing.

Durch die Führung der Rohrleitungen in Querstegen können die Rohrleitungen mit geringem Abstand zu den Außenwänden geführt werden und gleichzeitig als Lagerung für die Hebelelemente der Ventilbetätigung dienen. Die Lagerstellen der Hebelelemente (Schlepphebel) werden dabei durch Bohrungen der Rohrleitung direkt versorgt.By guiding the pipelines in crossbars, the pipelines can be guided at a short distance from the outer walls and at the same time serve as storage for the lever elements of the valve actuation. The bearing points of the lever elements (rocker arms) are supplied directly through holes in the pipeline.

Weitere Vorteile und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantages and advantageous developments of the invention result from the subclaims and the description.

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert. Letztere zeigt in

Fig. 1
eine vereinfachte Draufsicht auf ein geöffnetes Zylinderkopfgehäuse,
Fig. 2
einen Querschnitt durch den Zylinderkopf entlang der Linie II-II nach Fig. 1,
Fig. 3
einen Querschnitt durch den Zylinderkopf längs der Linie III-III nach Fig. 1,
Fig. 4
einen Schnitt in der Ebene E gemäß Fig. 2 parallel zur Flanschfläche des Zylinderkopfgehäuses durch eine der Stirnseiten,
Fig. 5
einen Schnitt in der Ebene E gemäß Fig. 2 parallel zur Flanschfläche des Zylinderkopfgehäuses durch die andere Stirnseite,
Fig. 6
eine Detailansicht des geöffneten Zylinderkopfes.
An embodiment of the invention is explained in more detail in the following description and drawing. The latter shows in
Fig. 1
a simplified plan view of an open cylinder head housing,
Fig. 2
2 shows a cross section through the cylinder head along the line II-II according to FIG. 1,
Fig. 3
2 shows a cross section through the cylinder head along the line III-III according to FIG. 1,
Fig. 4
2 shows a section in the plane E according to FIG. 2 parallel to the flange surface of the cylinder head housing through one of the end faces,
Fig. 5
2 shows a section in plane E according to FIG. 2 parallel to the flange surface of the cylinder head housing through the other end face,
Fig. 6
a detailed view of the open cylinder head.

Das Zylinderkopfgehäuse 1 ist über zwei Reihen von Zylinderkopfverschraubungen 2 mit einem Zylinderkurbelgehäuse 3 in Open-Deck-Bauweise verbunden und wird durch einen Deckel 4 an seiner Oberseite verschlossen. Im Zylinderkopfgehäuse 1 sind zwei parallele Nockenwellen gelagert, eine Einlaßnockenwelle 5 und eine Auslaßnockenwelle 6. Jede der beiden Nockenwellen 5, 6 betätigt über Schlepphebel 7 acht Einlaßventile 8 bzw. acht Auslaßventile 9. Dabei sind jedem Zylinder der Brennkraftmaschine zwei Einlaßventile und zwei Auslaßventile zugeordnet, die in Ventilführungen 10 bzw. 11 geführt sind. Die beiden Nockenwellen 5, 6 sind einerseits in Lagerstellen 12 im Bereich der linken Stirnwand 13 gelagert. Zwei weitere Lagerstellen 14 und 15 sind in Querstegen 16, 17 ausgebildet, die im Bereich des zweiten und vierten Zylinders angeordnet und mit der Außenwand 18 bzw. 19 verbunden sind. In den Querstegen 16 und 17 sind dazu die unteren Hälften der Lagerbohrungen 20 ausgebildet. Der obere Teil der Lagerbohrung ist in Lagerdeckeln 21 ausgebildet, die auf die Querstege 16 bzw. 17 aufgeschraubt sind. Die Schlepphebel sind in diesem Ausführungsbeispiel als Rollenschlepphebel ausgebildet und auf einer Achse 22 gelagert, die parallel zur jeweiligen Nockenwelle 5 bzw. 6 verläuft und als Rohr ausgebildet ist. Dieses Rohr 22 erstreckt sind über die gesamte innere Länge des Zylinderkopfgehäuses 1 und ist in Bohrungen 23 der Querstege 14 bzw. 15 geführt. Darüber hinaus ist das Rohr 22 weiterhin in Bohrungen 24 geführt, die in Querstege 25 eingebracht sind, die im Bereich der Zylinder 1 und 3 angeordnet und ebenfalls mit der jeweiligen Außenwand 18 bzw. 19 verbunden sind. Im Bereich der Stirnwand 13 sind die Achsen bzw. Rohre 22 in Sackbohrungen 26 bzw. 27 geführt und abgedichtet. Die Bohrungen 23, 24, 26 und 27 sind von der rechten Stirnwand 28 aus eingebracht. In der rechten Stirnwand 28 sind entsprechende Bohrungen 29, 30 ausgebildet, die im Bereich ihrer nach außen weisenden Öffnung mit Gewinden 31, 32 versehen sind. Durch die Bohrungen 29 bzw. 30 werden die Achsen bzw. Rohre 22 in das Zylinderkopfgehäuse 1 eingeschoben. Anschließend werden die Rollenschlepphebel 7 aufgesetzt und die Achsen durch die Bohrungen 23 bzw. 24 geschoben, bis sie in die Sackbohrungen 26 bzw. 27 eingeschoben sind. Durch Einschrauben von nicht dargestellten Verschlußstopfen in die Gewinde 31 bzw. 32 der Bohrungen 29, 30 im Bereich der Stirnwand 38 werden die Achsen bzw. Rohre 22 gesichert und verschlossen. Die Rohre 22 dienen im Betrieb der Brennkraftmaschine zur Ölversorgung der Lagerstellen 12, 14 und 15 der Nockenwellen 5 und 6. Dazu sind die Rohre 22 im Bereich der Querstege 16 und 17 und im Bereich der Lagerstellen 12 mit radialen Öffnungen 33 versehen, von denen Kanäle 34 zu den Lagerstellen 12, 14 und 15 ausgehen.The cylinder head housing 1 is connected via two rows of cylinder head screw connections 2 to a cylinder crankcase 3 in an open-deck construction and is closed by a cover 4 on its upper side. Two parallel camshafts are mounted in the cylinder head housing 1, an intake camshaft 5 and an exhaust camshaft 6. Each of the two camshafts 5, 6 actuates eight intake valves 8 and eight exhaust valves 9 via rocker arms 7. Two intake valves and two exhaust valves are assigned to each cylinder of the internal combustion engine, which are guided in valve guides 10 and 11. The two camshafts 5, 6 are mounted on the one hand in bearings 12 in the area of the left end wall 13. Two further bearing points 14 and 15 are formed in transverse webs 16, 17 which are arranged in the region of the second and fourth cylinders and are connected to the outer wall 18 and 19, respectively. For this purpose, the lower halves of the bearing bores 20 are formed in the crosspieces 16 and 17. The upper part of the bearing bore is formed in bearing caps 21 which are screwed onto the crossbars 16 and 17, respectively. The rocker arms are in this embodiment as Roller rocker arm formed and mounted on an axis 22 which runs parallel to the respective camshaft 5 or 6 and is designed as a tube. This tube 22 extends over the entire inner length of the cylinder head housing 1 and is guided in bores 23 of the transverse webs 14 and 15. In addition, the tube 22 is further guided in bores 24, which are introduced into transverse webs 25, which are arranged in the region of the cylinders 1 and 3 and are likewise connected to the respective outer wall 18 and 19, respectively. In the area of the end wall 13, the axes or tubes 22 are guided and sealed in blind bores 26 and 27. The bores 23, 24, 26 and 27 are made from the right end wall 28. Corresponding bores 29, 30 are formed in the right end wall 28, which are provided with threads 31, 32 in the region of their outward-facing opening. The axles or tubes 22 are inserted into the cylinder head housing 1 through the bores 29 and 30. The roller rocker arms 7 are then placed on and the axles are pushed through the bores 23 and 24 until they are inserted into the blind bores 26 and 27. By screwing sealing plugs, not shown, into the threads 31 or 32 of the bores 29, 30 in the region of the end wall 38, the axles or tubes 22 are secured and closed. The tubes 22 are used in the operation of the internal combustion engine to supply oil to the bearings 12, 14 and 15 of the camshafts 5 and 6. For this purpose, the tubes 22 are provided in the area of the transverse webs 16 and 17 and in the area of the bearings 12 with radial openings 33, of which channels 34 go out to bearings 12, 14 and 15.

Zwischen den Zylindern 2 und 3 sind weitere Querstege 35 ausgebildet, die ebenfalls von den Rohren 22 durchdrungen werden und die ebenfalls mit den Außenwänden 18 bzw. 19 verbunden sind. Durch diese Querstege 35 verlaufen endseitig Zylinderkopfverschraubungen 2, die in ihrem unteren Bereich einen Ringraum 36 bzw. 37 ausbilden. Der Ringraum 37 ist über einen im Kurbelzylindergehäuse 3 ausgebildeten Ringraum 38 auf an sich bekannte Weise mit der Schmiermittelversorgung der Brennkraftmaschine verbunden. Zwischen den beiden Ringräumen 36 und 37 verläuft im Zylinderkopfgehäuse 1 eine von außen eingebrachte Bohrung 39, die durch einen Stopfen 40 verschlossen ist.Between the cylinders 2 and 3 further transverse webs 35 are formed, which are also penetrated by the tubes 22 and which are also connected to the outer walls 18 and 19, respectively. Cylinder head screw connections 2, which form an annular space 36 or 37 in their lower region, run through these transverse webs 35. The annular space 37 is connected to the lubricant supply of the internal combustion engine in a manner known per se via an annular space 38 formed in the crank cylinder housing 3. Between the two annular spaces 36 and 37 runs in the cylinder head housing 1 from the outside bore 39 which is closed by a plug 40.

Über diese Querbohrung 39 sind die beiden Ringräume 36 und 37 miteinander verbunden. In die Ringräume 36 bzw. 37 münden Schrägbohrungen 41, 42, die jeweils im Quersteg 35 verlaufen. Diese sind von der Oberseite des Zylinderkopfgehäuses 1 aus eingebracht und schneiden die Bohrungen 43 zur Führung der Rohre 22. Die Rohre 22 sind auf ihrer unteren Seite mit radialen Öffnungen 44 versehen, die mit den Schrägbohrungen 41 bzw. 42 in Verbindung stehen. Über diese radialen Öffnungen 44 steht der Innenraum 45 der Rohre mit dem unteren Teil der Schrägbohrungen und damit der Ölversorgung in Verbindung. Gleichzeitig wird der obere Teil der Schrägbohrungen 41, 42 durch das Rohr 22 abgedichtet, so daß kein Schmiermittel austreten kann. Es ist jedoch auch möglich, die Abdichtung der Schrägbohrungen 41, 42 durch Stopfen vorzunehmen, die oberhalb der Rohre 22 eingesetzt werden.The two annular spaces 36 and 37 are connected to one another via this transverse bore 39. Oblique bores 41, 42, which each run in the transverse web 35, open into the annular spaces 36 and 37, respectively. These are introduced from the top of the cylinder head housing 1 and cut the bores 43 for guiding the tubes 22. The tubes 22 are provided on their lower side with radial openings 44 which are connected to the oblique bores 41 and 42, respectively. Via these radial openings 44, the interior 45 of the pipes is connected to the lower part of the oblique bores and thus to the oil supply. At the same time, the upper part of the oblique bores 41, 42 is sealed by the tube 22, so that no lubricant can escape. However, it is also possible to seal the oblique bores 41, 42 by means of plugs which are inserted above the tubes 22.

Im Bereich der Lagerung der Rollenschlepphebel 7 auf der Achse 22 (Rohr) ist diese mit weiteren, nicht dargestellten radialen Öffnungen versehen, über die die Lagerung der Rollenschlepphebel 7 auf der Achse 22 mit Schmiermittel versorgt wird.In the area of the bearing of the roller finger followers 7 on the axis 22 (tube), this is provided with further radial openings, not shown, via which the bearing of the roller finger followers 7 on the axis 22 is supplied with lubricant.

Claims (5)

Zylinderkopf für eine Brennkraftmaschine mit einem Zylinderkopfgehäuse (1), mit zwei obenliegenden Nockenwellen (5, 6) und zugeordneten Gaswechselventilen (8, 9), mit zwischen den Nocken der Nockenwelle und den Gaswechselventilen angeordneten Hebelelementen (7) und mit parallel zu den Nockenwellen verlaufenden Hauptölkanälen (22), von denen Kanäle (34) zur Versorgung der Nockenwellenlagerstellen und der Hebelelemente abzweigen, wobei die Hauptölkanäle über Ringräume (36, 37)der Zylinderkopfverschraubung (2) mit Schmiermittel versorgt werden, dadurch gekennzeichnet, daß die Hauptölkanäle im Bereich der Außenwände (18, 19) des Zylinderkopfgehäuses verlaufen, und daß diese Hauptölkanäle (22) über von der Oberseite des Zylinderkopfgehäuses (1) eingebrachte Bohrungen (41) mit den Ringräumen verbunden sind.Cylinder head for an internal combustion engine with a cylinder head housing (1), with two overhead camshafts (5, 6) and associated gas exchange valves (8, 9), with lever elements (7) arranged between the cams of the camshaft and the gas exchange valves, and with parallel to the camshafts Main oil channels (22), from which channels (34) branch off to supply the camshaft bearing points and the lever elements, the main oil channels being supplied with lubricant via annular spaces (36, 37) of the cylinder head screw connection (2), characterized in that the main oil channels in the area of the outer walls (18, 19) of the cylinder head housing, and that these main oil passages (22) are connected to the annular spaces via bores (41) made from the top of the cylinder head housing (1). Zylinderkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Hauptölkanäle (22) als Rohrleitungen ausgebildet sind, und daß diese Rohrleitungen in parallel zu den Nockenwellen (5, 6) verlaufenden Bohrungen (23, 43) geführt sind.Cylinder head according to claim 1, characterized in that the main oil passages (22) are constructed as pipelines and that these pipelines are guided in bores (23, 43) running parallel to the camshafts (5, 6). Zylinderkopf nach Anspruch 2, dadurch gekennzeichnet, daß die Bohrungen (23, 43) zur Führung der Rohrleitungen (22) in Querstege (16, 17, 25, 35) eingebracht sind, die mit einer der Außenwände (18, 19) verbunden sind.Cylinder head according to claim 2, characterized in that the bores (23, 43) for guiding the pipelines (22) are made in transverse webs (16, 17, 25, 35) which are connected to one of the outer walls (18, 19). Zylinderkopf nach Anspruch 3, dadurch gekennzeichnet, daß zumindest in einem Teil der Querstege (16, 17) jeweils der untere Teil einer Lagerbohrung (20) zur Lagerung der Nockenwelle ausgebildet ist.Cylinder head according to claim 3, characterized in that at least in one part of the crosspieces (16, 17) the lower part of a bearing bore (20) is formed for mounting the camshaft. Zylinderkopf nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Rohrleitungen (22) der Hauptölkanäle gleichzeitig als Lagerachse für die Hebelelemente (7) zur Gaswechselsteuerung dienen.Cylinder head according to one of claims 2 to 4, characterized in that the pipelines (22) of the main oil passages serve simultaneously as a bearing axis for the lever elements (7) for gas exchange control.
EP95107784A 1995-05-22 1995-05-22 Cylinder head for an internal combustion engine Expired - Lifetime EP0744531B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59504986T DE59504986D1 (en) 1995-05-22 1995-05-22 Cylinder head for an internal combustion engine
EP95107784A EP0744531B1 (en) 1995-05-22 1995-05-22 Cylinder head for an internal combustion engine
JP11935296A JP3889830B2 (en) 1995-05-22 1996-05-14 Cylinder head used in an internal combustion engine
KR1019960017145A KR100405587B1 (en) 1995-05-22 1996-05-21 Cylinder Head for Internal Combustion Engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95107784A EP0744531B1 (en) 1995-05-22 1995-05-22 Cylinder head for an internal combustion engine

Publications (2)

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EP0744531A1 true EP0744531A1 (en) 1996-11-27
EP0744531B1 EP0744531B1 (en) 1999-01-27

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EP (1) EP0744531B1 (en)
JP (1) JP3889830B2 (en)
KR (1) KR100405587B1 (en)
DE (1) DE59504986D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009007142A1 (en) * 2007-07-06 2009-01-15 Brp-Rotax Gmbh & Co. Kg Internal combustion engine cylinder head assembly
EP2339134A1 (en) * 2009-12-23 2011-06-29 Amadeo Marti Carbonell S.A. Improvements in lubricating the seats of a camshaft and rocker arm shaft in an internal combustion engine
CN102235262A (en) * 2010-04-28 2011-11-09 三菱自动车工业株式会社 Cylinder cover
WO2020151902A1 (en) * 2019-01-23 2020-07-30 Deutz Aktiengesellschaft Oil supply

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4742129B2 (en) * 2008-10-06 2011-08-10 株式会社オティックス Cam cap and method of manufacturing cam cap

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EP0061778A1 (en) * 1981-03-31 1982-10-06 Yamaha Motor Co., Ltd. Cylinder head fastening structure for internal combustion engines
GB2130672A (en) * 1982-09-27 1984-06-06 Honda Motor Co Ltd Internal combustion engine valve mechanism and lubricating system
DE3436426C2 (en) 1983-10-04 1988-02-04 Honda Giken Kogyo K.K., Tokio/Tokyo, Jp
EP0323233A1 (en) * 1987-12-28 1989-07-05 Honda Giken Kogyo Kabushiki Kaisha Lubricant supplying system for DOHC type multi-cylinder internal combustion engine
GB2216187A (en) * 1988-02-22 1989-10-04 Nissan Motor Oil return from a cylinder head for dohc i.c. engine with four valves per cylinder
EP0353988A1 (en) * 1988-08-01 1990-02-07 Honda Giken Kogyo Kabushiki Kaisha Valve operating system for internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061778A1 (en) * 1981-03-31 1982-10-06 Yamaha Motor Co., Ltd. Cylinder head fastening structure for internal combustion engines
GB2130672A (en) * 1982-09-27 1984-06-06 Honda Motor Co Ltd Internal combustion engine valve mechanism and lubricating system
DE3436426C2 (en) 1983-10-04 1988-02-04 Honda Giken Kogyo K.K., Tokio/Tokyo, Jp
EP0323233A1 (en) * 1987-12-28 1989-07-05 Honda Giken Kogyo Kabushiki Kaisha Lubricant supplying system for DOHC type multi-cylinder internal combustion engine
GB2216187A (en) * 1988-02-22 1989-10-04 Nissan Motor Oil return from a cylinder head for dohc i.c. engine with four valves per cylinder
EP0353988A1 (en) * 1988-08-01 1990-02-07 Honda Giken Kogyo Kabushiki Kaisha Valve operating system for internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009007142A1 (en) * 2007-07-06 2009-01-15 Brp-Rotax Gmbh & Co. Kg Internal combustion engine cylinder head assembly
EP2339134A1 (en) * 2009-12-23 2011-06-29 Amadeo Marti Carbonell S.A. Improvements in lubricating the seats of a camshaft and rocker arm shaft in an internal combustion engine
CN102235262A (en) * 2010-04-28 2011-11-09 三菱自动车工业株式会社 Cylinder cover
CN102235262B (en) * 2010-04-28 2013-05-29 三菱自动车工业株式会社 Cylinder cover
WO2020151902A1 (en) * 2019-01-23 2020-07-30 Deutz Aktiengesellschaft Oil supply
CN113272529A (en) * 2019-01-23 2021-08-17 道依茨股份公司 Oil supply device

Also Published As

Publication number Publication date
KR100405587B1 (en) 2004-04-09
DE59504986D1 (en) 1999-03-11
JPH09119343A (en) 1997-05-06
KR960041675A (en) 1996-12-19
JP3889830B2 (en) 2007-03-07
EP0744531B1 (en) 1999-01-27

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