EP0967381B1 - Cylinder head for internal combustion engine - Google Patents

Cylinder head for internal combustion engine Download PDF

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Publication number
EP0967381B1
EP0967381B1 EP99108108A EP99108108A EP0967381B1 EP 0967381 B1 EP0967381 B1 EP 0967381B1 EP 99108108 A EP99108108 A EP 99108108A EP 99108108 A EP99108108 A EP 99108108A EP 0967381 B1 EP0967381 B1 EP 0967381B1
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EP
European Patent Office
Prior art keywords
cylinder head
combustion engine
oil
internal
engine 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
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EP99108108A
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German (de)
French (fr)
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EP0967381A1 (en
Inventor
Roland Stromsky
Albrecht Reustle
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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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
    • 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 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • 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 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a cylinder head of an internal combustion engine with a device for returning lubricating oil from the interior of the cylinder head after Genus of the main claim.
  • a generic cylinder head is for example from DE 40 07 939 C1 known. There is a separate manifold on the outside of this cylinder head attached, the several arranged in the cylinder head and over the Longitudinal distribution of distributed bores is connected to the interior. About these Bores will accumulate in the interior of the cylinder head, at the Lubricating oil escaping into the manifold from various bearing points via a pump and a return line with the oil reservoir of the Internal combustion engine is connected. With such cylinder heads, it can in Depending on the installation position of the internal combustion engine, that does not happen the oil accumulating in the cylinder head is extracted under all operating conditions becomes. There is a risk that the lubricant supply to the Internal combustion engine may not have sufficient oil quantities from the circuit has available.
  • Such a cylinder head for example, in the longitudinal direction of the motor vehicle installed, accumulates either when accelerating or Decelerate the oil on the side of the cylinder head facing away from the pump. As a result, the manifold may not be completely filled with oil, so that via the connections facing the pump to the interior of the Air is sucked into the cylinder head and the oil in the cylinder head is not extracted becomes. If such a cylinder head is installed transversely to the direction of travel, can for example, when cornering corresponding air sucked in Oil located in the cylinder head cannot be extracted.
  • a cylinder head of an internal combustion engine with a device for returning lubricating oil from the interior improve that even with strong accelerations / decelerations or at When cornering, the oil collected in the interior of the cylinder head is sucked out and can be returned to the oil reservoir.
  • a particularly safe oil extraction is advantageously ensured if the two manifolds at their ends facing away from the suction point are connected. Collects in such a cylinder head due to Accelerations the oil in the cylinder head essentially in the range this connection point, the oil in the first manifold can also be sucked off via the connection of the two manifolds.
  • the manifolds can be particularly advantageous and inexpensive Manufacture if these are cast in with cast components of the cylinder head be, so that neither external lines, screw connections with appropriate Leakage problems or long holes with the corresponding effort in the Manufacturing are needed.
  • the cylinder head shown in Figures 1 to 5 is not limited to this Exemplary embodiment as one of the two cylinder heads of a 6-cylinder boxer engine shown, which is installed in the longitudinal direction of the vehicle.
  • This cylinder head is composed of three housing components, a cylinder head basic housing 1, a camshaft housing 2 and a cylinder head cover 3.
  • Das Cylinder head basic housing 1 has a lower flange surface 4, which is used for connection to serves the cylinder block or the crankcase, not shown.
  • the upper Flange surface 5 of the cylinder head base housing 1 is with the cylinder head installed the lower flange surface 6 of the camshaft housing connected. Its upper Flange surface 7 is connected to the flange surface 8 of the cylinder head cover 3.
  • the Camshaft housing 2 is used to accommodate tappets, not shown for actuating the gas exchange valves and at the same time contains the lower bearing caps for receiving the two camshafts, also not shown.
  • the Camshaft housing 2 and cylinder head cover 3 enclose an interior 9, in which the camshafts described above rotate and in which are in operation the internal combustion engine from the bearings of the camshafts and Cup tappet collects escaping lubricating oil.
  • This interior 9 is by two Longitudinal walls 10 and 11 in an upper part space 12 and a lower one in the installed position Subspace 13 separated. These subspaces 12 and 13 are each by the Storage chairs 14 divided in the longitudinal direction.
  • transverse channels 15 are the upper part 12 and the lower part 13 connected to each other, so that Oil accumulating in the upper subspace 12 via the transverse channels 15 in the lower Subspace 13 can flow.
  • This subspace 13 is in turn connected via transverse channels 16 a cast, in the longitudinal direction of the camshaft housing extending oil collection channel 17 connected.
  • Two of the transverse channels 16 are included each arranged in the area of a storage chair 14, with their opening area in the interior 9 or the subspace 13 in both longitudinal directions over the width of the Bearing chair 14 extends.
  • Three further transverse channels 16 connect the subspace 13 the manifold 17 in the middle of the cylinder.
  • a further manifold 19 is formed on the lower longitudinal wall is also cast in the cast cylinder head cover 3.
  • This The manifold 19 has a suction connection 20 which is connected to one of the two end walls 21 is arranged.
  • this end wall 21 In the area of this end wall 21 is the one described here Embodiment of the chain case 22 formed for receiving or Cover of the control drive, not shown, is used.
  • a bore 25 In the field of opposite end wall 23 is a bore 25 which is arranged by the Flange surface 8 starts and opens into the interior of the manifold 19.
  • This Bore 25 is connected to an aligned bore 26 which is from the upper Flange surface 7 of the camshaft housing 2 starting in the manifold 17th empties.
  • This manifold is also provided with a suction port 27, the is also arranged in the region of the chain case 22.
  • the two suction connections 20 and 27 are each one with the suction side shown, known oil pump connected, which the extracted oil in the promotes also not shown oil reservoir of the internal combustion engine.
  • the Suction can take place, for example, via two separate oil pumps, it is however, it is also possible to extract oil via a pump with two separate Make suction connections.
  • the manifold 13 is connected in an analogous manner via the bores 25 and 26 filled.
  • This arrangement of the manifold and the staggered arrangement of the Connections to the interior ensures that even with strongly fluctuating Oil levels in the interior of the cylinder head always at least one of the two Bus lines with their corresponding cross connection so with the interior is connected that the respective cross connection constantly below the oil level is located.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft einen Zylinderkopf einer Brennkraftmaschine mit einer Einrichtung zur Rückführung von Schmieröl aus dem Innenraum des Zylinderkopfes nach der Gattung des Hauptanspruches.The invention relates to a cylinder head of an internal combustion engine with a device for returning lubricating oil from the interior of the cylinder head after Genus of the main claim.

Ein gattungsgemäßer Zylinderkopf ist beispielsweise aus der DE 40 07 939 C1 bekannt. An der Außenseite dieses Zylinderkopfes ist eine separate Sammelleitung befestigt, die über mehrere im Zylinderkopf angeordnete und über die Längserstreckung verteilte Bohrungen mit dem Innenraum verbunden ist. Über diese Bohrungen wird das sich im Innenraum der Zylinderkopf ansammelnde, an den verschiedenen Lagerstellen austretende Schmieröl in die Sammelleitung geführt, die über eine Pumpe und eine Rücklaufleitung mit dem Ölvorratsbehälter der Brennkraftmaschine verbunden ist. Bei derartigen Zylinderköpfen kann es in Abhängigkeit von der Einbaulage der Brennkraftmaschine dazu kommen, daß nicht unter allen Betriebsbedingungen das sich im Zylinderkopf ansammelnde Öl abgesaugt wird. Dabei besteht die Gefahr, daß die Schmiermittelversorgung der Brennkraftmaschine unter Umständen nicht ausreichende Ölmengen aus dem Kreislauf zur Verfügung hat. Wird ein derartiger Zylinderkopf beispielsweise in Längsrichtung des Kraftfahrzeuges eingebaut, sammelt sich entweder bei Beschleunigung oder Verzögerung das Öl auf der der Pumpe abgewandten Seite des Zylinderkopfes. Dadurch ist unter Umständen die Sammelleitung nicht vollständig mit Öl gefüllt, so daß über die der Pumpe zugewandten Verbindungen mit dem Innenraum des Zylinderkopfes Luft angesaugt und das im Zylinderkopf befindliche Öl nicht abgesaugt wird. Wird ein derartiger Zylinderkopf quer zur Fahrtrichtung eingebaut, kann beispielsweise bei Kurvenfahrten entsprechend Luft angesaugt bzw. das im Zylinderkopf befindliche Öl nicht abgesaugt werden. A generic cylinder head is for example from DE 40 07 939 C1 known. There is a separate manifold on the outside of this cylinder head attached, the several arranged in the cylinder head and over the Longitudinal distribution of distributed bores is connected to the interior. About these Bores will accumulate in the interior of the cylinder head, at the Lubricating oil escaping into the manifold from various bearing points via a pump and a return line with the oil reservoir of the Internal combustion engine is connected. With such cylinder heads, it can in Depending on the installation position of the internal combustion engine, that does not happen the oil accumulating in the cylinder head is extracted under all operating conditions becomes. There is a risk that the lubricant supply to the Internal combustion engine may not have sufficient oil quantities from the circuit has available. Such a cylinder head, for example, in the longitudinal direction of the motor vehicle installed, accumulates either when accelerating or Decelerate the oil on the side of the cylinder head facing away from the pump. As a result, the manifold may not be completely filled with oil, so that via the connections facing the pump to the interior of the Air is sucked into the cylinder head and the oil in the cylinder head is not extracted becomes. If such a cylinder head is installed transversely to the direction of travel, can for example, when cornering corresponding air sucked in Oil located in the cylinder head cannot be extracted.

Es ist daher die Aufgabe der Erfindung, einen Zylinderkopf einer Brennkraftmaschine mit einer Einrichtung zur Rückführung von Schmieröl aus dem Innenraum so zu verbessern, daß auch bei starken Beschleunigungen/Verzögerungen bzw. bei Kurvenfahrten das sich im Innenraum des Zylinderkopfes ansammelnde Öl abgesaugt und in den Ölvorratsbehälter zurückgeführt werden kann.It is therefore the object of the invention, a cylinder head of an internal combustion engine with a device for returning lubricating oil from the interior improve that even with strong accelerations / decelerations or at When cornering, the oil collected in the interior of the cylinder head is sucked out and can be returned to the oil reservoir.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Hauptanspruches gelöst. Durch Anordnung einer zweiten Sammelleitung am Zylinderkopf, die getrennt von der ersten Sammelleitung ausgebildet ist und von denen eine Sammelleitung im vorderen oder hinteren Bereich des Zylinderkopfes mit dem Innenraum verbunden ist, während die andere im gegenüberliegenden hinteren bzw. vorderen Bereich des Zylinderkopfes mit dessen Innenraum verbunden ist, kann auch das sich bei starken Beschleunigungen nahezu vollständig in einem Endbereich des Zylinderkopfes ansammelnde Öl abgesaugt werden, da sich jederzeit in mindestens einer der beiden Sammelleitungen ein Ölstand einstellt, der - ohne Ansaugen von Luft-von der Ölpumpe abgesaugt werden kann. Mit einer derartigen Ausbildung des Zylinderkopfes ist es möglich, das sich im Innenraum ansammelnde Öl trotz Schwankungen des Ölstandes aufgrund von Beschleunigungen oder Kurvenfahrten sicher abzusaugen, ohne daß dafür bewegliche Bauteile, wie beispielsweise Ventile, Rückschlagklappen oder ähnliche Bauelemente, erforderlich sind.This object is achieved with the characterizing features of Main claim solved. By arranging a second manifold on Cylinder head, which is formed separately from the first manifold and from which a manifold in the front or rear area of the cylinder head with the Interior is connected, while the other in the opposite rear or front area of the cylinder head with its interior can also which is almost completely in an end region of the Cylinder head accumulating oil can be sucked out, because at least at any time one of the two manifolds sets an oil level that - without sucking in air from the oil pump can be sucked off. With such training Cylinder head, it is possible to collect the oil in the interior despite Fluctuations in the oil level due to acceleration or cornering Vacuum safely without moving parts such as valves Check valves or similar components are required.

Eine einfache Kanalführung von den Sammelleitungen zum jeweiligen Sauganschluß der Ölpumpe läßt sich auf vorteilhafte Weise gewährleisten, wenn beide Sammelleitungen an der gleichen Längsseite des Zylinderkopfes angeordnet sind.A simple ducting from the manifolds to the respective suction connection the oil pump can be ensured in an advantageous manner if both Bus lines are arranged on the same long side of the cylinder head.

Eine besonders sichere Ölabsaugung wird in vorteilhafter Weise gewährleistet, wenn die beiden Sammelleitungen an ihren den Saugstelle abgewandten Enden miteinander verbunden sind. Sammelt sich bei einem derartigen Zylinderkopf aufgrund von Beschleunigungen das im Zylinderkopf befindliche Öl im wesentlichen im Bereich dieser Verbindungsstelle an, kann auch das in der ersten Sammelleitung befindliche Öl über die Verbindung der beiden Sammelleitungen abgesaugt werden.A particularly safe oil extraction is advantageously ensured if the two manifolds at their ends facing away from the suction point are connected. Collects in such a cylinder head due to Accelerations the oil in the cylinder head essentially in the range this connection point, the oil in the first manifold can also be sucked off via the connection of the two manifolds.

Die Sammelleitungen lassen sich auf besonders vorteilhafte und kostengünstige Weise herstellen, wenn diese bei gegossenen Bauteilen des Zylinderkopfes mit eingegossen werden, so daß weder externe Leitungen, Schraubverbindungen mit entsprechenden Dichtheitsproblemen oder lange Bohrungen mit entsprechendem Aufwand bei der Herstellung benötigt werden.The manifolds can be particularly advantageous and inexpensive Manufacture if these are cast in with cast components of the cylinder head be, so that neither external lines, screw connections with appropriate Leakage problems or long holes with the corresponding effort in the Manufacturing are needed.

Eine auch bei nahezu konstantem Fahrbetrieb und in Fahrtrichtung horizontaler Anordnung der Zylinderkopflängsachse sichere Ölabsaugung wird gewährleistet, wenn die erste Sammelleitung auch in einem mittleren Bereich des Zylinderkopfes mit dessen Innenraum verbunden ist.One more horizontal even with almost constant driving and in the direction of travel Arrangement of the cylinder head longitudinal axis safe oil extraction is guaranteed if the first manifold also in a central area of the cylinder head whose interior is connected.

Es ist weiterhin von Vorteil, wenn die beiden Sammelleitungen in unterschiedlichen Bauteilen des Zylinderkopfes ausgebildet sind, wobei eine besonders einfache Verbindung der beiden Sammelleitungen über eine gemeinsame Flanschfläche erfolgen kann.It is also advantageous if the two manifolds are in different Components of the cylinder head are formed, with a particularly simple Connection of the two manifolds via a common flange surface can be done.

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 Draufsicht auf die dem Zylinderkopfdeckel zugewandte Flanschfläche des Nockenwellengehäuses,
Fig. 2
eine Draufsicht auf die Flanschfläche des Zylinderkopfdeckels,
Fig. 3
einen Schnitt durch den Zylinderkopfdeckel entlang der Linie III-III nach Fig. 2,
Fig. 4
einen Schnitt durch das Nockenwellengehäuse entlang der Linie IV-IV nach Fig. 1 und
Fig. 5
einen Schnitt durch das Zylinderkopfgrundgehäuse.
An embodiment of the invention is explained in more detail in the following description and drawing. The latter shows in
Fig. 1
2 shows a plan view of the flange surface of the camshaft housing facing the cylinder head cover,
Fig. 2
a plan view of the flange surface of the cylinder head cover,
Fig. 3
3 shows a section through the cylinder head cover along the line III-III according to FIG. 2,
Fig. 4
a section through the camshaft housing along the line IV-IV of FIG. 1 and
Fig. 5
a section through the cylinder head base housing.

Der in den Figuren 1 bis 5 dargestellte Zylinderkopf ist ohne Beschränkung auf dieses Ausführungsbeispiel als einer der beiden Zylinderköpfe eines 6-Zylinder Boxermotors dargestellt, der in Längsrichtung des Fahrzeuges eingebaut ist. Dieser Zylinderkopf setzt sich aus drei Gehäusebauteilen zusammen, einem Zylinderkopfgrundgehäuse 1, einem Nockenwellengehäuse 2 und einem Zylinderkopfdeckel 3. Das Zylinderkopfgrundgehäuse 1 hat eine untere Flanschfläche 4, die zur Anbindung an den nicht dargestellten Zylinderblock bzw. des Kurbelgehäuse dient. Die obere Flanschfläche 5 des Zylinderkopfgrundgehäuses 1 ist bei montiertem Zylinderkopf mit der unteren Flanschfläche 6 des Nockenwellengehäuses verbunden. Dessen obere Flanschfläche 7 ist mit der Flanschfläche 8 des Zylinderkopfdeckels 3 verbunden. Das Nockenwellengehäuse 2 dient zur Aufnahme nicht näher dargestellter Tassenstößel zur Betätigung der Gaswechselventile und enthält gleichzeitig die unteren Lagerdeckel für die Aufnahme der beiden ebenfalls nicht dargestellten Nockenwellen. Das Nockenwellengehäuse 2 und der Zylinderkopfdeckel 3 umschließen einen Innenraum 9, in dem die zuvor beschriebenen Nockenwellen rotieren und in dem sich im Betrieb der Brennkraftmaschine das aus den Lagerstellen der Nockenwellen und der Tassenstößel austretende Schmieröl sammelt. Dieser Innenraum 9 ist durch zwei Längswände 10 und 11 in einen in Einbaulage oberen Teilraum 12 und einen unteren Teilraum 13 getrennt. Diese Teilräume 12 und 13 werden jeweils durch die Lagerstühle 14 in Längsrichtung unterteilt. Über eingegossene Querkanäle 15 sind der obere Teilraum 12 und der untere Teilraum 13 miteinander verbunden, so daß das sich im oberen Teilraum 12 ansammelnde Öl über die Querkanäle 15 in den unteren Teilraum 13 fließen kann. Dieser Teilraum 13 ist wiederum über Querkanäle 16 mit einem eingegossenen, sich in Längsrichtung des Nockenwellengehäuses erstreckenden Ölsammelkanal 17 verbunden. Zwei der Querkanäle 16 sind dabei jeweils im Bereich eines Lagerstuhls 14 angeordnet, wobei sich ihr Öffnungsbereich in den Innenraum 9 bzw. den Teilraum 13 in beide Längsrichtungen über die Breite des Lagerstuhls 14 erstreckt. Drei weitere Querkanäle 16 verbinden den Teilraum 13 mit der Sammelleitung 17 jeweils im mittleren Bereich der Zylinder.The cylinder head shown in Figures 1 to 5 is not limited to this Exemplary embodiment as one of the two cylinder heads of a 6-cylinder boxer engine shown, which is installed in the longitudinal direction of the vehicle. This cylinder head is composed of three housing components, a cylinder head basic housing 1, a camshaft housing 2 and a cylinder head cover 3. Das Cylinder head basic housing 1 has a lower flange surface 4, which is used for connection to serves the cylinder block or the crankcase, not shown. The upper Flange surface 5 of the cylinder head base housing 1 is with the cylinder head installed the lower flange surface 6 of the camshaft housing connected. Its upper Flange surface 7 is connected to the flange surface 8 of the cylinder head cover 3. The Camshaft housing 2 is used to accommodate tappets, not shown for actuating the gas exchange valves and at the same time contains the lower bearing caps for receiving the two camshafts, also not shown. The Camshaft housing 2 and cylinder head cover 3 enclose an interior 9, in which the camshafts described above rotate and in which are in operation the internal combustion engine from the bearings of the camshafts and Cup tappet collects escaping lubricating oil. This interior 9 is by two Longitudinal walls 10 and 11 in an upper part space 12 and a lower one in the installed position Subspace 13 separated. These subspaces 12 and 13 are each by the Storage chairs 14 divided in the longitudinal direction. About cast cross channels 15 are the upper part 12 and the lower part 13 connected to each other, so that Oil accumulating in the upper subspace 12 via the transverse channels 15 in the lower Subspace 13 can flow. This subspace 13 is in turn connected via transverse channels 16 a cast, in the longitudinal direction of the camshaft housing extending oil collection channel 17 connected. Two of the transverse channels 16 are included each arranged in the area of a storage chair 14, with their opening area in the interior 9 or the subspace 13 in both longitudinal directions over the width of the Bearing chair 14 extends. Three further transverse channels 16 connect the subspace 13 the manifold 17 in the middle of the cylinder.

An der unteren Längswand ist eine weitere Sammelleitung 19 ausgebildet, die ebenfalls in den gegossenen Zylinderkopfdeckel 3 eingegossen ist. Diese Sammelleitung 19 hat einen Sauganschluß 20, der an einer der beiden Stirnwände 21 angeordnet ist. Im Bereich dieser Stirnwand 21 ist bei dem hier beschriebenen Ausführungsbeispiel der Kettenkasten 22 ausgebildet, der zur Aufnahme bzw. Abdeckung des nicht dargestellten Steuertriebes dient. Im Bereich der gegenüberliegenden Stirnwand 23 ist eine Bohrung 25 angeordnet, die von der Flanschfläche 8 ausgeht und in das Innere der Sammelleitung 19 mündet. Diese Bohrung 25 ist mit einer fluchtenden Bohrung 26 verbunden, die von der oberen Flanschfläche 7 des Nockenwellengehäuses 2 ausgehend in die Sammelleitung 17 mündet. Diese Sammelleitung ist ebenfalls mit einem Sauganschluß 27 versehen, der ebenfalls im Bereich des Kettenkastens 22 angeordnet ist.A further manifold 19 is formed on the lower longitudinal wall is also cast in the cast cylinder head cover 3. This The manifold 19 has a suction connection 20 which is connected to one of the two end walls 21 is arranged. In the area of this end wall 21 is the one described here Embodiment of the chain case 22 formed for receiving or Cover of the control drive, not shown, is used. In the field of opposite end wall 23 is a bore 25 which is arranged by the Flange surface 8 starts and opens into the interior of the manifold 19. This Bore 25 is connected to an aligned bore 26 which is from the upper Flange surface 7 of the camshaft housing 2 starting in the manifold 17th empties. This manifold is also provided with a suction port 27, the is also arranged in the region of the chain case 22.

Die beiden Sauganschlüsse 20 und 27 sind jeweils mit der Saugseite einer nicht dargestellten, an sich bekannten Ölpumpe verbunden, die das abgesaugte Öl in den ebenfalls nicht dargestellten Ölvorratsbehälter der Brennkraftmaschine fördert. Die Absaugung kann dabei beispielsweise über zwei separate Ölpumpen erfolgen, es ist jedoch auch möglich, die Ölabsaugung über eine Pumpe mit zwei getrennten Sauganschlüssen vorzunehmen.The two suction connections 20 and 27 are each one with the suction side shown, known oil pump connected, which the extracted oil in the promotes also not shown oil reservoir of the internal combustion engine. The Suction can take place, for example, via two separate oil pumps, it is however, it is also possible to extract oil via a pump with two separate Make suction connections.

Im Betrieb der Brennkraftmaschine sammelt sich das an den Lagerstellen der Nockenwellen bzw. Tassenstößel austretende Öl in den Teilräumen 12 bzw. 13 an. Das sich im Teilraum 12 ansammelnde Öl gelangt infolge der Wirkung der Schwerkraft über die Querkanäle 15 in den unteren Teilraum 13. Der Teilraum 13 wiederum ist über die Querkanäle 16 mit der Sammelleitung 17 verbunden, die ebenfalls infolge der Wirkung der Schwerkraft mit dem sich im Innenraum ansammelnden Öl aufgefüllt wird. During operation of the internal combustion engine, this accumulates at the bearings of the Oil emerging from camshafts or bucket tappets in compartments 12 and 13. The oil that accumulates in the subspace 12 arrives due to the action of gravity over the transverse channels 15 into the lower subspace 13. The subspace 13 is in turn connected via the transverse channels 16 to the manifold 17, which is also due to the Effect of gravity with which oil accumulates in the interior.

Über die Bohrungen 25 und 26 wird dabei in analoger Weise die Sammelleitung 13 befüllt.The manifold 13 is connected in an analogous manner via the bores 25 and 26 filled.

Sammelt sich im Betrieb der Brennkraftmaschine aufgrund von starken Beschleunigungs- bzw. Verzögerungsvorgängen der Hauptteil des sich im Innenraum befindlichen Öls im Bereich der Stirnwand 23 an, wird über die Sammelleitung 17 kein bzw. nur ein geringer Anteil des Öls abgesaugt, da aufgrund des entsprechenden Ölstandes im Bereich der dem Kettenkasten 22 zugewandten Querkanäle 16 Luft aus dem Innenraum angesaugt werden kann und ein Absaugen des im gegenüberliegenden Bereich befindlichen Öls nicht möglich ist. Dieses Öl wird jedoch über die Sammelleitung 19 abgesaugt, da diese nur im Bereich der Stirnwand 23 mit dem Innenraum bzw. der anderen Sammelleitung verbunden ist, so daß ihre Saugöffnungen ständig unterhalb des Ölspiegels liegen.Collects in the operation of the internal combustion engine due to strong Accelerating or decelerating the main part of the interior located oil in the region of the end wall 23, is not on the manifold 17 or only a small proportion of the oil is sucked off, because of the corresponding Oil level in the area of the transverse channels 16 facing the chain box 16 the interior can be sucked in and a suction of the oil in the opposite area is not possible. However, this oil will aspirated via the manifold 19, since this only in the area of the end wall 23 the interior or the other manifold is connected so that their Suction openings are always below the oil level.

Sammelt sich bei entgegengesetzt gerichteten Beschleunigungs- bzw. Verzögerungsvorgängen das im Innenraum befindliche Öl im wesentlichen im Bereich des Kettenkastens an, wird unter Umständen über die Bohrungen 25, 26 und die entsprechende Sammelleitung 19 Luft angesaugt. Eine Entsorgung des Zylinderkopfes kann dennoch stattfinden, da über den im Bereich des Kettenkastens 22 angeordneten Querkanal 16 Öl abgesaugt wird.Collects with opposite acceleration or Delays the oil in the interior essentially in the area of the chain case, may be on the holes 25, 26 and corresponding manifold 19 air sucked. Disposal of the cylinder head can nevertheless take place, since the 22 arranged transverse channel 16 oil is extracted.

Durch diese Anordnung der Sammelleitung und die versetzte Anordnung der Verbindungen in den Innenraum wird sichergestellt, daß auch bei stark schwankenden Ölständen im Innenraum des Zylinderkopfes stets mindestens eine der beiden Sammelleitungen mit ihrer entsprechenden Querverbindung so mit dem Innenraum verbunden ist, daß die jeweilige Querverbindung ständig unterhalb des Ölspiegels befindlich ist.This arrangement of the manifold and the staggered arrangement of the Connections to the interior ensures that even with strongly fluctuating Oil levels in the interior of the cylinder head always at least one of the two Bus lines with their corresponding cross connection so with the interior is connected that the respective cross connection constantly below the oil level is located.

Claims (8)

  1. A cylinder head (1, 2, 3) of an internal-combustion engine with a device for returning lubricating oil from the interior space (9) of the cylinder head to an oil-storage tank with at least one collecting line (17, 19) extending in the longitudinal direction of the cylinder head and connected to a suction connexion (20, 27) of a pump, characterized in that the cylinder head (1, 2, 3) has two separate collecting lines (17, 19) arranged thereon, which extend in each case in the longitudinal direction of the cylinder head and are connected in each case to the interior space (9) and of which the first collecting line (17) is connected to the interior space of the cylinder head in the front or rear region of the said cylinder head and the second collecting line (19) is connected to the interior space (9) of the cylinder head only in the rear or front region - opposite the said connexion - of the said cylinder head.
  2. A cylinder head of an internal-combustion engine according to Claim 1, characterized in that the two collecting lines (17, 19) are arranged on the same longitudinal side of the cylinder head (1, 2, 3).
  3. A cylinder head of an internal-combustion engine according to Claim 1 or 2, characterized in that the two collecting lines (17, 19) are connected to each other at their ends remote from the suction connexions (20, 27).
  4. A cylinder head of an internal-combustion engine according to one of the preceding Claims, characterized in that the component (2, 3) of the cylinder head receiving the respective collecting line (17, 19) is cast and the collecting line is cast in.
  5. A cylinder head of an internal-combustion engine according to one of the preceding Claims, characterized in that the first collecting line (17) is connected to the interior space (9) of the cylinder head at least in a front or rear region and a central region of the said cylinder head.
  6. A cylinder head of an internal-combustion engine according to one of the preceding Claims, characterized in that the cylinder head (1, 2, 3) is formed from a plurality of components, and the two collecting lines (17, 19) are formed in different components (2,3).
  7. A cylinder head of an internal-combustion engine according to one of the preceding Claims, characterized in that one collecting line (19) is formed in a cylinder-head cover (3).
  8. A cylinder head of an internal-combustion engine according to one of the preceding Claims, characterized in that one collecting line (17) is formed in a camshaft housing (2).
EP99108108A 1998-06-25 1999-04-24 Cylinder head for internal combustion engine Expired - Lifetime EP0967381B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19828307 1998-06-25
DE19828307A DE19828307A1 (en) 1998-06-25 1998-06-25 Cylinder head of an internal combustion engine

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EP0967381A1 EP0967381A1 (en) 1999-12-29
EP0967381B1 true EP0967381B1 (en) 2003-06-04

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US (1) US6135082A (en)
EP (1) EP0967381B1 (en)
JP (1) JP2000038911A (en)
DE (2) DE19828307A1 (en)
ES (1) ES2195466T3 (en)

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Also Published As

Publication number Publication date
DE59905799D1 (en) 2003-07-10
DE19828307A1 (en) 1999-12-30
ES2195466T3 (en) 2003-12-01
US6135082A (en) 2000-10-24
JP2000038911A (en) 2000-02-08
EP0967381A1 (en) 1999-12-29

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