EP3559419B1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
EP3559419B1
EP3559419B1 EP17801593.9A EP17801593A EP3559419B1 EP 3559419 B1 EP3559419 B1 EP 3559419B1 EP 17801593 A EP17801593 A EP 17801593A EP 3559419 B1 EP3559419 B1 EP 3559419B1
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EP
European Patent Office
Prior art keywords
oil
cylinder head
internal combustion
combustion engine
return channel
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EP17801593.9A
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German (de)
French (fr)
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EP3559419A1 (en
Inventor
Matthias Kringels
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Deutz AG
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Deutz AG
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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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F01M2011/023—Arrangements of lubricant conduits between oil sump and cylinder head
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0444—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with means for accommodating movement or position of engines
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
    • F01M2013/0494—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase using check valves

Definitions

  • the invention relates to an internal combustion engine with a centrally arranged oil return.
  • Such internal combustion engines are known, for. B. from the DE 197 15 061 C2 , in which a venting device for a crankcase of an internal combustion engine is described, to which a cylinder head is attached, which is covered by a cylinder head cover, the venting device having an oil separator that is essentially integrated into the cylinder head cover and is provided with baffles, which is formed by a one-piece with the Cylinder head cover connected upper part and a bottom part is formed, wherein the oil separator has an inlet, an intake manifold connected to the intake system of the internal combustion engine and an oil outlet, and the chicanes of the oil separator are formed by webs of the upper part.
  • an internal combustion engine for a motor vehicle with an oil delivery device for supplying oil to lubrication points, with an oil pan being provided for collecting returning oil, with a separating device being provided in the oil pan, which divides the oil pan into a first and a second section, with a device for wet-sump lubrication with a wet-sump circuit connected to the first section, and a device for dry-sump lubrication with a dry-sump circuit connected to the second section, wherein the separating device has a check valve opening towards the first section with wet-sump lubrication.
  • a cyclone oil separator for the crankcase ventilation of internal combustion engines is known with an inlet nozzle for the oily crankcase air, which opens tangentially into a cyclone chamber in the separator housing, the cross section of the inlet nozzle being variable in order to produce an optimum pressure gradient or to achieve optimum separation.
  • the DE 31 22 851 A1 discloses crankcase ventilation of an internal combustion engine with a pot-shaped container mounted in the valve chamber on the rocker arm block, which is closed at the top in relation to the valve housing cover with the interposition of an elastic seal, the space in the container being connected on the one hand by the housing cover to the intake system of the internal combustion engine and on the other hand by a oppositely arranged opening is in communication with the valve chamber or with the crankcase.
  • the invention is based on the object of reliably ensuring the oil return in an internal combustion engine even in a corresponding inclined position.
  • an internal combustion engine which comprises at least one crankcase, at least one cylinder head, at least one cylinder head cover, at least one oil separator and at least one oil pan for collecting returning oil and at least one oil return channel connecting the oil separator and the oil pan, the oil return passage sloping outwardly toward and around a cylinder head bolt after entering the cylinder head, and the oil return passage is centrally located below the oil separator.
  • the oil separator is arranged in the cylinder head cover.
  • Another development of the invention provides that the oil separator has a bulkhead towards the clean air part.
  • the oil return channel is arranged at the lower end of the oil separator.
  • Another development of the invention provides that the oil return duct runs from the cylinder head cover into the cylinder head via at least one plug-in piece or an axial seal.
  • the oil return channel is part of the cylinder head gasket, so that the cylinder head gasket has oil-carrying properties.
  • the oil return channel is realized below the cylinder head gasket by means of a groove machined into the raw part contour of the crankcase and merges into a tube cross section running essentially perpendicularly in the direction of the oil pan.
  • a further development of the invention provides that the end of the oil return channel is provided with a check valve.
  • FIG 1 an internal combustion engine with a maximum inclined position alpha and an oil return channel 7 is shown.
  • the internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part.
  • the separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination alpha in such a way that it just cannot overflow from the oil separator 4 .
  • the oil return passage 7 is arranged at a lower end of the oil separator and is led toward the oil pan on an outer side of the internal combustion engine.
  • figure 2 represents an internal combustion engine with a maximum inclined position alpha and two oil return channels 7.
  • the internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part having.
  • the separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination alpha in such a way that it just cannot overflow from the oil separator 4 .
  • the oil return passages 7 are each arranged at a lower end of the oil separator and are led toward the oil pan on an outer side of the internal combustion engine.
  • FIG 3 an internal combustion engine is shown with a maximum inclined position beta and an oil return channel 7, the angle beta being greater than the angle alpha.
  • the internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part.
  • the separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination beta in such a way that it just cannot overflow from the oil separator 4 .
  • the oil return channel 7 is arranged centrally under the oil separator 4 and is from the center of the cylinder head 2 in the direction of the cylinder head screw 8 to an outer side of the internal combustion engine towards the oil pan in such a way that the cylinder head screw 8 is partially surrounded by the returning oil, with the returning oil flowing away from the cylinder head screw and towards it in the area of the cylinder head gasket is led to the wall of the crankcase, z. B. in a for this purpose arranged in the crankcase 1 groove.
  • a check valve is arranged at the lower end of the oil return channel 7 .

Description

Die Erfindung betrifft eine Brennkraftmaschine mit einem zentral angeordneten Ölrücklauf.The invention relates to an internal combustion engine with a centrally arranged oil return.

Derartige Brennkraftmaschinen sind bekannt, z. B. aus der DE 197 15 061 C2 , in der eine Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine beschrieben wird, an welchem ein Zylinderkopf befestigt ist, der von einer Zylinderkopfhaube abgedeckt ist, wobei die Entlüftungsvorrichtung einen im Wesentlichen in die Zylinderkopfhaube integrierten und mit Schikanen versehenen Ölabscheider aufweist, der durch ein einstückig mit der Zylinderkopfhaube verbundenes Oberteil und ein Bodenteil gebildet ist, wobei der Ölabscheider einen Eintritt, einen mit dem Ansaugsystem der Brennkraftmaschine verbundenen Ansaugstutzen sowie einen Ölaustritt aufweist, und wobei die Schikanen des Ölabscheiders durch Stege des Oberteils gebildet werden.Such internal combustion engines are known, for. B. from the DE 197 15 061 C2 , in which a venting device for a crankcase of an internal combustion engine is described, to which a cylinder head is attached, which is covered by a cylinder head cover, the venting device having an oil separator that is essentially integrated into the cylinder head cover and is provided with baffles, which is formed by a one-piece with the Cylinder head cover connected upper part and a bottom part is formed, wherein the oil separator has an inlet, an intake manifold connected to the intake system of the internal combustion engine and an oil outlet, and the chicanes of the oil separator are formed by webs of the upper part.

Weiter ist aus der DE 101 19 924 B4 eine Brennkraftmaschine für ein Kraftfahrzeug mit einer Ölfördereinrichtung zur Ölversorgung von Schmierstellen offenbart, wobei eine Ölwanne zum Sammeln von rücklaufendem Öl vorgesehen ist, wobei in der Ölwanne eine Trennvorrichtung vorgesehen ist, welche die Ölwanne in einen ersten und einen zweiten Abschnitt unterteilt, wobei eine Vorrichtung zur Nasssumpfschmierung mit einem Nasssumpfkreislauf, welche mit dem ersten Abschnitt verbunden ist, und eine Vorrichtung zur Trockensumpfschmierung mit einem Trockensumpfkreislauf, welche mit dem zweiten Abschnitt verbunden ist, vorgesehen ist, wobei die Trennvorrichtung ein sich in Richtung des ersten Abschnitts mit Nasssumpfschmierung öffnendes Rückschlagventil aufweist.Next is from the DE 101 19 924 B4 discloses an internal combustion engine for a motor vehicle with an oil delivery device for supplying oil to lubrication points, with an oil pan being provided for collecting returning oil, with a separating device being provided in the oil pan, which divides the oil pan into a first and a second section, with a device for wet-sump lubrication with a wet-sump circuit connected to the first section, and a device for dry-sump lubrication with a dry-sump circuit connected to the second section, wherein the separating device has a check valve opening towards the first section with wet-sump lubrication.

Des Weiteren ist aus der DE 31 28 470 A1 ein Zyklonölabscheider für die Kurbelgehäuse-Entlüftung von Brennkraftmaschinen bekannt mit einer Einlassdüse für die ölhaltige Kurbelgehäuseluft, die tangential in eine Zyklonkammer im Abscheidergehäuse mündet, wobei der Querschnitt der Einlassdüse zur Erzeugung eines optimalen Druckgefälles bzw. zum Erreichen einer optimalen Abscheidung veränderbar ist.Furthermore, from the DE 31 28 470 A1 a cyclone oil separator for the crankcase ventilation of internal combustion engines is known with an inlet nozzle for the oily crankcase air, which opens tangentially into a cyclone chamber in the separator housing, the cross section of the inlet nozzle being variable in order to produce an optimum pressure gradient or to achieve optimum separation.

Die DE 31 22 851 A1 offenbart eine Kurbelgehäuseentlüftung einer Brennkraftmaschine mit einem in der Ventilkammer auf dem Kipphebelbock gelagerten topfförmigen Behälter, der nach oben gegenüber dem Ventilgehäusedeckel unter Zwischenschaltung einer elastischen Dichtung verschlossen ist, wobei der im Behälter befindliche Raum einerseits durch den Gehäusedeckel mit dem Ansaugsystem der Brennkraftmaschine und andererseits durch eine entgegengesetzt angeordnete Öffnung mit der Ventilkammer bzw. mit dem Kurbelgehäuse in Verbindung steht.The DE 31 22 851 A1 discloses crankcase ventilation of an internal combustion engine with a pot-shaped container mounted in the valve chamber on the rocker arm block, which is closed at the top in relation to the valve housing cover with the interposition of an elastic seal, the space in the container being connected on the one hand by the housing cover to the intake system of the internal combustion engine and on the other hand by a oppositely arranged opening is in communication with the valve chamber or with the crankcase.

Aus der DE 197 03 771 C1 ist eine Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine bekannt.From the DE 197 03 771 C1 a ventilation device for a crankcase of an internal combustion engine is known.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Brennkraftmaschine auch bei entsprechender Schräglage den Ölrücklauf zuverlässig sicher zu stellen.The invention is based on the object of reliably ensuring the oil return in an internal combustion engine even in a corresponding inclined position.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass eine Brennkraftmaschine geschaffen wird, die wenigstens ein Kurbelgehäuse, wenigstens einen Zylinderkopf, wenigstens eine Zylinderkopfhaube, wenigstens einen Ölabscheider und wenigstens eine Ölwanne zum Sammeln von rücklaufendem Öl und wenigstens einen den Ölabscheider und die Ölwanne verbindenden Ölrücklaufkanal umfasst, wobei der Ölrücklaufkanal nach dem Eintritt in den Zylinderkopf schräg nach außen in Richtung einer Zylinderkopfschraube und um sie herum verläuft, und der Ölrücklaufkanal mittig unterhalb des Ölabscheiders angeordnet ist.The object is achieved according to the invention in that an internal combustion engine is created which comprises at least one crankcase, at least one cylinder head, at least one cylinder head cover, at least one oil separator and at least one oil pan for collecting returning oil and at least one oil return channel connecting the oil separator and the oil pan, the oil return passage sloping outwardly toward and around a cylinder head bolt after entering the cylinder head, and the oil return passage is centrally located below the oil separator.

Weiter kann vorgesehen sein, dass der Ölabscheider in der Zylinderkopfhaube angeordnet ist.Furthermore, it can be provided that the oil separator is arranged in the cylinder head cover.

Eine andere Weiterbildung der Erfindung sieht vor, dass der Ölabscheider ein Schott zum Reinluftteil hin aufweist.Another development of the invention provides that the oil separator has a bulkhead towards the clean air part.

In einer Weiterbildung der Erfindung ist vorgesehen, dass der Ölrücklaufkanal am unteren Ende des Ölabscheiders angeordnet ist.In a further development of the invention it is provided that the oil return channel is arranged at the lower end of the oil separator.

Eine andere Weiterbildung der Erfindung sieht vor, dass der Ölrücklaufkanal von der Zylinderkopfhaube in den Zylinderkopf über wenigstens ein Steckstück oder eine axiale Dichtung erfolgt.Another development of the invention provides that the oil return duct runs from the cylinder head cover into the cylinder head via at least one plug-in piece or an axial seal.

In einer anderen Weiterbildung der Erfindung ist vorgesehen, dass der Ölrücklaufkanal Teil der Zylinderkopfdichtung ist, so dass der Zylinderkopfdichtung ölführende Eigenschaften zuteilwerden.In another development of the invention, it is provided that the oil return channel is part of the cylinder head gasket, so that the cylinder head gasket has oil-carrying properties.

Weiterhin kann vorgesehen sein, dass der Ölrücklaufkanal unterhalb der Zylinderkopfdichtung mittels einer in die Rohteilkontur des Kurbelgehäuses eingearbeiteten Nut realisiert ist und in einen im Wesentlichen senkrecht in Richtung Ölwanne verlaufenden Rohrquerschnitt übergeht.Furthermore, it can be provided that the oil return channel is realized below the cylinder head gasket by means of a groove machined into the raw part contour of the crankcase and merges into a tube cross section running essentially perpendicularly in the direction of the oil pan.

Eine weitere Weiterbildung der Erfindung sieht vor, dass das Ende des Ölrücklaufkanals mit einem Rückschlagventil versehen ist.A further development of the invention provides that the end of the oil return channel is provided with a check valve.

Die Erfindung wird anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen näher beschrieben. Es zeigen:

Figur 1
eine Brennkraftmaschine mit maximaler Schräglage alpha und einem Ölrücklaufkanal
Figur 2
eine Brennkraftmaschine mit maximaler Schräglage alpha und zwei Ölrücklaufkanälen
Figur 3
eine Brennkraftmaschine mit mittig angeordnetem Ölrücklaufkanal und Schräglage beta.
The invention is described in more detail using an exemplary embodiment with reference to the drawings. Show it:
figure 1
an internal combustion engine with maximum inclination alpha and an oil return channel
figure 2
an internal combustion engine with maximum inclination alpha and two oil return channels
figure 3
an internal combustion engine with a centrally arranged oil return channel and inclined position beta.

In Figur 1 ist eine Brennkraftmaschine mit einer maximalen Schräglage alpha und einem Ölrücklaufkanal 7 dargestellt. Die Brennkraftmaschine verfügt über ein Kurbelgehäuse 1, einen Zylinderkopf 2 und eine über dem Zylinderkopf 2 angeordnete Zylinderkopfhaube 3, in der ein Ölabscheider 4 angeordnet ist, der ein Schott 5 hin zum Reinluftteil aufweist. Das abgeschiedene Öl 6 ist bei dem definierten Schräglagenwinkel alpha so im Ölabscheider 4 angeordnet, dass es gerade nicht aus dem Ölabscheider 4 überlaufen kann. Der Ölrücklaufkanal 7 ist an einem unteren Ende des Ölabscheiders angeordnet und wird auf einer äußeren Seite der Brennkraftmaschine hin zur Ölwanne geführt.In figure 1 an internal combustion engine with a maximum inclined position alpha and an oil return channel 7 is shown. The internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part. The separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination alpha in such a way that it just cannot overflow from the oil separator 4 . The oil return passage 7 is arranged at a lower end of the oil separator and is led toward the oil pan on an outer side of the internal combustion engine.

Figur 2 stellt eine Brennkraftmaschine mit einer maximalen Schräglage alpha und zwei Ölrücklaufkanälen 7 dar. Die Brennkraftmaschine verfügt über ein Kurbelgehäuse 1, einen Zylinderkopf 2 und eine über dem Zylinderkopf 2 angeordnete Zylinderkopfhaube 3, in der ein Ölabscheider 4 angeordnet ist, der ein Schott 5 hin zum Reinluftteil aufweist. Das abgeschiedene Öl 6 ist bei dem definierten Schräglagenwinkel alpha so im Ölabscheider 4 angeordnet, dass es gerade nicht aus dem Ölabscheider 4 überlaufen kann. Die Ölrücklaufkanäle 7 sind jeweils an einem unteren Ende des Ölabscheiders angeordnet und werden auf einer äußeren Seite der Brennkraftmaschine hin zur Ölwanne geführt. figure 2 represents an internal combustion engine with a maximum inclined position alpha and two oil return channels 7. The internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part having. The separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination alpha in such a way that it just cannot overflow from the oil separator 4 . The oil return passages 7 are each arranged at a lower end of the oil separator and are led toward the oil pan on an outer side of the internal combustion engine.

In Figur 3 ist eine Brennkraftmaschine mit einer maximalen Schräglage beta und einem Ölrücklaufkanal 7 dargestellt, wobei der Winkel beta größer ist als der Winkel alpha. Die Brennkraftmaschine verfügt über ein Kurbelgehäuse 1, einen Zylinderkopf 2 und eine über dem Zylinderkopf 2 angeordnete Zylinderkopfhaube 3, in der ein Ölabscheider 4 angeordnet ist, der ein Schott 5 hin zum Reinluftteil aufweist. Das abgeschiedene Öl 6 ist bei dem definierten Schräglagenwinkel beta so im Ölabscheider 4 angeordnet, dass es gerade nicht aus dem Ölabscheider 4 überlaufen kann. Der Ölrücklaufkanal 7 ist mittig unter dem Ölabscheider 4 angeordnet und wird von der Mitte des Zylinderkopfs 2 in Richtung der Zylinderkopfschraube 8 so zu einer äußeren Seite der Brennkraftmaschine hin zur Ölwanne geführt, dass die Zylinderkopfschraube 8 in einem Teilbereich vom rückfließenden Öl umströmt wird, wobei im Bereich der Zylinderkopfdichtung das rückführende Öl weg von der Zylinderkopfschraube und hin zur Wandung des Kurbelgehäuses geführt wird, z. B. in einer hierfür im Kurbelgehäuse 1 angeordneten Nut. Am unteren Ende des Ölrücklaufkanals 7 ist ein Rückschlagventil angeordnet.In figure 3 an internal combustion engine is shown with a maximum inclined position beta and an oil return channel 7, the angle beta being greater than the angle alpha. The internal combustion engine has a crankcase 1, a cylinder head 2 and a cylinder head cover 3 arranged above the cylinder head 2, in which an oil separator 4 is arranged, which has a bulkhead 5 towards the clean air part. The separated oil 6 is arranged in the oil separator 4 at the defined angle of inclination beta in such a way that it just cannot overflow from the oil separator 4 . The oil return channel 7 is arranged centrally under the oil separator 4 and is from the center of the cylinder head 2 in the direction of the cylinder head screw 8 to an outer side of the internal combustion engine towards the oil pan in such a way that the cylinder head screw 8 is partially surrounded by the returning oil, with the returning oil flowing away from the cylinder head screw and towards it in the area of the cylinder head gasket is led to the wall of the crankcase, z. B. in a for this purpose arranged in the crankcase 1 groove. A check valve is arranged at the lower end of the oil return channel 7 .

Bezugszeichenlistereference list

11
Kurbelgehäusecrankcase
22
Zylinderkopfcylinder head
33
Zylinderkopfhaubecylinder head cover
44
Ölabscheideroil separator
55
Schott zum ReinluftteilBulkhead to clean air section
66
Abgeschiedenes ÖlSeparated Oil
77
Ölrücklaufkanaloil return channel
88th
ZylinderkopfschraubeCylinderhead screw

Claims (8)

  1. Internal combustion engine, comprising at least one crankcase (1), at least one cylinder head (2), at least one cylinder head cover (3), at least one oil separator (4) and at least one oil sump for collecting returning oil, and at least one oil return channel (7) which connects the oil separator (4) and the oil sump, the oil return channel (7) running, after entry into the cylinder head (2), obliquely outwards in the direction of a cylinder head screw (8) and around the latter, characterized in that the oil return channel (7) is arranged centrally below the oil separator (4).
  2. Internal combustion engine according to Claim 1, characterized in that the oil separator (4) is arranged in the cylinder head cover (3).
  3. Internal combustion engine according to one or more of the preceding claims, characterized in that the oil separator (4) has a bulkhead (5) towards the clean air part.
  4. Internal combustion engine according to one or more of the preceding claims, characterized in that the oil return channel (7) is arranged at the lower end of the oil separator (4).
  5. Internal combustion engine according to one or more of the preceding claims, characterized in that the oil return channel (7) is effected from the cylinder head cover (3) into the cylinder head (2) via at least one plug-in piece or an axial seal.
  6. Internal combustion engine according to one or more of the preceding claims, characterized in that the oil return channel (7) is part of a cylinder head gasket, with the result that the cylinder head gasket is given oil-conducting properties.
  7. Internal combustion engine according to one or more of the preceding claims, characterized in that the oil return channel (7) is realised below the cylinder head gasket by means of a groove which is machined into the blank part contour of the crankcase (1) and merges into a pipe cross section which runs substantially perpendicularly in the direction of the oil sump.
  8. Internal combustion engine according to one or more of the preceding claims, characterized in that the end of the oil return channel (7) is provided with a check valve.
EP17801593.9A 2016-12-20 2017-11-08 Internal combustion engine Active EP3559419B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016015111.0A DE102016015111B4 (en) 2016-12-20 2016-12-20 Internal combustion engine
PCT/EP2017/001297 WO2018114026A1 (en) 2016-12-20 2017-11-08 Internal combustion engine

Publications (2)

Publication Number Publication Date
EP3559419A1 EP3559419A1 (en) 2019-10-30
EP3559419B1 true EP3559419B1 (en) 2023-05-31

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EP17801593.9A Active EP3559419B1 (en) 2016-12-20 2017-11-08 Internal combustion engine

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US (1) US11111830B2 (en)
EP (1) EP3559419B1 (en)
CN (1) CN110088435B (en)
DE (1) DE102016015111B4 (en)
WO (1) WO2018114026A1 (en)

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US20200191029A1 (en) 2020-06-18
DE102016015111B4 (en) 2021-10-14
DE102016015111A1 (en) 2018-06-21
EP3559419A1 (en) 2019-10-30
CN110088435A (en) 2019-08-02
CN110088435B (en) 2021-07-27
WO2018114026A1 (en) 2018-06-28

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