EP1310637A2 - Engine with at least two cylinder banks - Google Patents

Engine with at least two cylinder banks Download PDF

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Publication number
EP1310637A2
EP1310637A2 EP02020994A EP02020994A EP1310637A2 EP 1310637 A2 EP1310637 A2 EP 1310637A2 EP 02020994 A EP02020994 A EP 02020994A EP 02020994 A EP02020994 A EP 02020994A EP 1310637 A2 EP1310637 A2 EP 1310637A2
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EP
European Patent Office
Prior art keywords
cylinder head
oil
oil separation
head cover
separation chamber
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
EP02020994A
Other languages
German (de)
French (fr)
Other versions
EP1310637B1 (en
EP1310637A3 (en
Inventor
Werner Gschwindt
Thomas Wasserbäch
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
Original Assignee
Dr Ing HCF Porsche AG
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Publication date
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Publication of EP1310637A2 publication Critical patent/EP1310637A2/en
Publication of EP1310637A3 publication Critical patent/EP1310637A3/en
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Publication of EP1310637B1 publication Critical patent/EP1310637B1/en
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Classifications

    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1832—Number of cylinders eight
    • 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 an internal combustion engine with at least two rows of cylinder banks according to the preamble of claim 1.
  • a device for crankcase ventilation is a known two-row internal combustion engine, in which on the cylinder head housing or Breather lines attached to the cylinder head cover in the crankcase area so-called blow-by gases and the suction system of the internal combustion engine in be returned to a closed cycle.
  • blow-by gases on the inside of the cylinder head cover, to which the blow-by gases flow past and part of the oil carried by the blow-by gases is deposited.
  • crankcase ventilation for to improve multi-row internal combustion engine in that at Crankcase ventilation effectively removes the carried oil from the blow-by gases and on the other hand the effort for externally routed ventilation lines is reduced.
  • crankcase ventilation should also when driving uphill or downhill Be ensured motor vehicle.
  • the oil separation chamber is integrated in the cylinder head cover so that the inlet opening for the blow-by gases essentially in the middle of the cylinder head cover, based on its longitudinal extension is arranged. This is also the case for ascents and descents Motor vehicle ensured that despite the located in the camshaft space Do not lubricate the crankcase ventilation through the oil separation chamber is impaired.
  • the oil separation chamber is advantageously constructed in two parts and consists of a bowl-like bottom part, which is completed by a cover element.
  • Another oil separator is provided on a cylinder head cover Direction of flow of the blow-by gases seen, to the second in the cylinder head cover integrated oil separation chamber.
  • a pressure regulator is attached to the oil separator, its output via a Connection line leads to the intake manifold of the internal combustion engine. So that in Depending on the load state of the internal combustion engine prevailing in the intake manifold Vacuum to a constant suitable for the crankcase ventilation Negative pressure value can be adjusted.
  • the internal combustion engine designed as a V8 engine has two rows of cylinder banks 2 and 3 on, both of which are integrated in a crankcase upper part 4 and to which one as Crankshaft bearing bridge designed crankcase lower part 5 connects. Between the crankcase upper part 4 and the crankcase lower part 5 is accordingly a crankshaft 6 is mounted.
  • the two rows of cylinder banks 2 and 3 have two Cylinder heads 7 and 8, in which, among other things, those for controlling the input or Exhaust valves required intake camshafts 9 and 10 as well as the Exhaust camshafts 11 and 12 are included.
  • the intake camshafts 9, 10 and the exhaust camshafts 11, 12 are arranged on the crankshaft 6 Drive - double gear and a control chain 14 formed as an endless drive, one so-called duplex chain, driven. Both cylinder heads 7 and 8 are up through each completed a cylinder head cover 16 and 18.
  • the one on the cylinder head cover 16 provided connector 32 forms the outlet opening for the oil separation chamber 20. How 2 can be seen, a vent or at the outlet 32 Connection line 34 connected, which leads to the cylinder head cover 18 and their the other end at an inlet connection 36 provided on the cylinder head cover 18 is attached.
  • the inlet connector 36 is arranged on the cylinder head cover 18 so that it directly next to the inlet opening 30 of the oil separation chamber 22 in the through the Cylinder head cover 18 opens the closed camshaft space 17.
  • the Oil separation chamber 22 is located above an outlet opening 38 with a spiral - Oil separator 40 in connection.
  • a pressure regulator 42 is located on the spiral oil separator 40 attached, which, if necessary, the negative pressure in the crankcase compared to that in the Suction system prevailing vacuum reduced.
  • the pressure regulator 42 has one Output nozzle 44, to which a line 46 is connected, to the intake manifold leads the suction system of the internal combustion engine, not shown.
  • Both oil separation chambers 20, 22 also have at their lid edges Openings 48 through which the lubricating oil located in the oil separation chamber 20, 22 can cross the camshaft chamber 17. Furthermore, in the Oil separating chambers 20 and 22 partition walls 50 (dashed lines) which act as a labyrinth shown). As can be seen in particular from FIGS. 5 and 6, the spaced between the two inlet openings 28 and 30, a separating rib 52 and 54, respectively intended. The two ribs 52 and 54 prevent the lubricating oil from on this The intended camshaft bearing height - supply of lubricating oil via openings 28 and 30 gets into the oil separation chambers 20 and 22. In the middle of the two Cylinder head covers 16, 18 each extend in the longitudinal direction Middle rib 56, 58.
  • blow-by gases of the left bank of cylinders 1 to 4 are due to the in the intake manifold prevailing vacuum conditions via the opening 28 into the oil separation chamber 20 guided.
  • a part of the blow-by gases can be in the oil separation chamber 20 entrained lubricating oil are deposited, which in turn in particular transient operation (acceleration, braking) via the openings 48 in the Camshaft space 17 returned.
  • the blow-by gases are then over the Connection or ventilation line 34 to the right bank of cylinders 5 to 8 in the Cylinder head cover 18 transferred. There they enter the camshaft space 17 and are via the opening 30 together with the blow-by gases from the right Row of cylinder banks led into the second oil separation chamber 22.

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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)

Abstract

Internal combustion engine comprises an oil separation chamber provided with an inlet and outlet opening in each of the cylinder head covers (16, 18) as part of the crankcase ventilator. The oil separation chambers are connected via their inlet openings to the respective camshaft chamber (17). <??>Preferred Features: The oil separation chamber is integrated in the cylinder head cover so that the inlet opening of the oil separation chamber is arranged in the middle of the cylinder head cover relative to its longitudinal extension. The oil separation chamber is sealed by a separate cover. The outlet opening of the second oil separation chamber leads to an oil separator integrated in the cylinder head cover. A pressure regulator fixed to the oil separator has an outlet leading to the intake pipe of the engine.

Description

Die Erfindung betrifft eine Brennkraftmaschine mit mindestens zwei Zylinderbankreihen nach dem Oberbegriff des Anspruchs 1.The invention relates to an internal combustion engine with at least two rows of cylinder banks according to the preamble of claim 1.

Aus der US-PS 3,908,617 ist eine Vorrichtung zur Kurbelgehäuseentlüftung einer zweireihigen Brennkraftmaschine bekannt, bei der über am Zylinderkopfgehäuse bzw. Zylinderkopfdeckel angebrachte Entlüftungsleitungen die im Kurbelgehäuseraum befindlichen sog. Blow-By-Gase abgeführt und der Sauganlage der Brennkraftmaschine in einem geschlossenen Kreislauf wieder zugeführt werden. Darüber hinaus sind auf der Innenseite der Zylinderkopfdeckel Blechleitelemente angebracht, an denen die Blow-By-Gase vorbeiströmen und ein Teil des durch die Blow-By-Gase mitgeführten Öls abgeschieden wird.From US-PS 3,908,617 a device for crankcase ventilation is a known two-row internal combustion engine, in which on the cylinder head housing or Breather lines attached to the cylinder head cover in the crankcase area so-called blow-by gases and the suction system of the internal combustion engine in be returned to a closed cycle. In addition, on the Sheet metal guiding elements attached to the inside of the cylinder head cover, to which the blow-by gases flow past and part of the oil carried by the blow-by gases is deposited.

Demgegenüber ist es Aufgabe der Erfindung, die Kurbelgehäuseentlüftung für eine mehrreihige Brennkraftmaschine dahingehend zu verbessern, dass bei der Kurbelgehäuseentlüftung den Blow-By-Gasen wirkungsvoll das mitgeführte Öl entzogen wird und andererseits der Aufwand für extern geführte Entlüftungsleitungen reduziert ist. Darüber hinaus soll die Kurbelgehäuseentlüftung auch bei Berg- bzw. Talfahrten des Kraftfahrzeuges sichergestellt sein.In contrast, it is an object of the invention, the crankcase ventilation for to improve multi-row internal combustion engine in that at Crankcase ventilation effectively removes the carried oil from the blow-by gases and on the other hand the effort for externally routed ventilation lines is reduced. In addition, the crankcase ventilation should also when driving uphill or downhill Be ensured motor vehicle.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Patentanspruchs 1 gelöst. Durch die im Zylinderkopfdeckel angeordneten Ölabscheidekammern, durch die die Blow-By-Gase hindurchgeführt werden, kann bereits ein Teil des mitgeführten Öls in diesen Kammern abgeschieden werden. Mit Hilfe der separat ausgebildeten Ölabscheidekammer können die eintretenden Blow-By-Gase "beruhigt" werden, so dass Ölanteile in den Blow-By-Gasen abgeschieden und ggf. über in einer Wand der Ölabscheidekammer vorgesehene Öffnungen in den Nockenwellenraum zurückgeführt werden.According to the invention, this object is achieved by the features of patent claim 1. Through the oil separation chambers in the cylinder head cover, through which the blow-by gases some of the carried oil can already be passed through it Chambers are separated. With the help of the separately designed oil separation chamber The blow-by gases entering can be "calmed down" so that oil components in the blow-by gases separated and possibly over in a wall of the oil separation chamber provided openings are returned to the camshaft space.

Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten. Further features embodying the invention are contained in the subclaims.

Die Ölabscheidekammer ist so im Zylinderkopfdeckel integriert, dass die Eintrittsöffnung für die Blow-By-Gase im wesentlichen in der Mitte des Zylinderkopfdeckels, bezogen auf seine Längserstreckung, angeordnet ist. Damit ist auch bei Berg- und Talfahrten des Kraftfahrzeuges sicher gestellt, dass trotz des im Nockenwellenraum befindlichen Schmieröls die Kurbelgehäuseentlüftung über die Ölabscheidekammer nicht beeinträchtigt ist.The oil separation chamber is integrated in the cylinder head cover so that the inlet opening for the blow-by gases essentially in the middle of the cylinder head cover, based on its longitudinal extension is arranged. This is also the case for ascents and descents Motor vehicle ensured that despite the located in the camshaft space Do not lubricate the crankcase ventilation through the oil separation chamber is impaired.

Die Ölabscheidekammer ist in vorteilhafter Weise zweiteilig aufgebaut und besteht aus einem schalenartigen Bodenteil, das durch ein Deckelelement abgeschlossen ist.The oil separation chamber is advantageously constructed in two parts and consists of a bowl-like bottom part, which is completed by a cover element.

An einem Zylinderkopfdeckel ist ein weiterer Ölabscheider vorgesehen, der sich in Strömungsrichtung der Blow-By-Gase gesehen, an die zweite im Zylinderkopfdeckel integrierte Ölabscheidekammer anschließt.Another oil separator is provided on a cylinder head cover Direction of flow of the blow-by gases seen, to the second in the cylinder head cover integrated oil separation chamber.

Auf den Ölabscheider ist ein Druckregler aufgesetzt, dessen Ausgang über eine Verbindungsleitung zum Saugrohr der Brennkraftmaschine führt. Damit kann der in Abhängigkeit vom Lastzustand der Brennkraftmaschine im Saugrohr herrschende Unterdruck auf einen für die Kurbelgehäuseentlüftung geeigneten konstanten Unterdruckwert eingeregelt werden.A pressure regulator is attached to the oil separator, its output via a Connection line leads to the intake manifold of the internal combustion engine. So that in Depending on the load state of the internal combustion engine prevailing in the intake manifold Vacuum to a constant suitable for the crankcase ventilation Negative pressure value can be adjusted.

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert.An embodiment of the invention is in the following description and Drawing explained in more detail.

Es zeigen

Fig. 1
eine Stirnansicht einer Brennkraftmaschine,
Fig. 2
eine Darstellung der beiden Zylinderkopfdeckel der Brennkraftmaschine,
Fig. 3
eine Innenansicht auf einen ersten Zylinderkopfdeckel,
Fig. 4
eine Innenansicht auf einen zweiten Zylinderkopfdeckel,
Fig. 5
einen Längsschnitt durch den ersten Zylinderkopfdeckel,
Fig. 6
einen Längsschnitt durch den zweiten Zylinderkopfdeckel und
Fig. 7
einen Querschnitt durch den zweiten Zylinderkopfdeckel.
Show it
Fig. 1
an end view of an internal combustion engine,
Fig. 2
a representation of the two cylinder head covers of the internal combustion engine,
Fig. 3
an interior view of a first cylinder head cover,
Fig. 4
an interior view of a second cylinder head cover,
Fig. 5
a longitudinal section through the first cylinder head cover,
Fig. 6
a longitudinal section through the second cylinder head cover and
Fig. 7
a cross section through the second cylinder head cover.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Die als V8 - Motor ausgebildete Brennkraftmaschine weist zwei Zylinderbankreihen 2 und 3 auf, die beide in einem Kurbelgehäuseoberteil 4 integriert sind und an das sich ein als Kurbelwellenlagerbrücke ausgestaltetes Kurbelgehäuseunterteil 5 anschließt. Zwischen dem Kurbelgehäuseoberteil 4 und dem Kurbelgehäuseunterteil 5 ist dementsprechend eine Kurbelwelle 6 gelagert. Die beiden Zylinderbankreihen 2 und 3 weisen zwei Zylinderköpfe 7 und 8 auf, in denen unter anderem die zur Steuerung der Ein- bzw. Auslassventile erforderlichen Einlassnockenwellen 9 und 10 sowie die Auslassnockenwellen 11 und 12 aufgenommen sind. Die Einlassnockenwellen 9, 10 und die Auslassnockenwellen 11, 12 werden über ein auf der Kurbelwelle 6 angeordnetes Antriebs - Doppelzahnrad und einer als Endlostrieb ausgebildeten Steuerkette 14, einer sog. Duplexkette, angetrieben. Beide Zylinderköpfe 7 und 8 werden nach oben hin durch jeweils einen Zylinderkopfdeckel 16 und 18 abgeschlossen.The internal combustion engine designed as a V8 engine has two rows of cylinder banks 2 and 3 on, both of which are integrated in a crankcase upper part 4 and to which one as Crankshaft bearing bridge designed crankcase lower part 5 connects. Between the crankcase upper part 4 and the crankcase lower part 5 is accordingly a crankshaft 6 is mounted. The two rows of cylinder banks 2 and 3 have two Cylinder heads 7 and 8, in which, among other things, those for controlling the input or Exhaust valves required intake camshafts 9 and 10 as well as the Exhaust camshafts 11 and 12 are included. The intake camshafts 9, 10 and the exhaust camshafts 11, 12 are arranged on the crankshaft 6 Drive - double gear and a control chain 14 formed as an endless drive, one so-called duplex chain, driven. Both cylinder heads 7 and 8 are up through each completed a cylinder head cover 16 and 18.

In bzw. an den Zylinderkopfdeckeln 16, 18 der beiden Zylinderbankreihen 1 bis 4 bzw. 5 bis 8 sind Vorrichtungen zur Kurbelgehäuseentlüftung vorgesehen, die im nachfolgenden näher beschrieben sind. Grundsätzlich werden die bei der Verbrennung bzw. beim Verdichtungstakt in den Kurbelgehäuseraum der Brennkraftmaschine übertretenden Blow-By-Gase über im Motorgehäuse integrierte Entlüftungswege (nicht dargestellt) in den Nockenwellenraum 17 geleitet, von wo sie aus dem Ansaugtrakt der Brennkraftmaschine wieder zugeführt werden. Dazu ist in jedem Zylinderkopfdeckel 16, 18 eine Ölabscheidekammer 20 und 22 integriert, die gegenüber dem Nockenwellenraum 17 durch einen Deckel 24 bzw. 26 abgeschlossen ist. Beide Ölabscheidekammern 20, 22 weisen jeweils eine Eingangsöffnung 28 und 30 auf, über die die Blow-By-Gase in die Ölabscheidekammer 20 bzw. 22 eintreten können. Der am Zylinderkopfdeckel 16 vorgesehene Stutzen 32 bildet die Austrittsöffnung für die Ölabscheidekammer 20. Wie aus Fig. 2 ersichtlich, ist an den Austrittsstutzen 32 eine Entlüftung- bzw. Verbindungsleitung 34 angeschlossen, die zum Zylinderkopfdeckel 18 führt und deren anderes Ende an einem am Zylinderkopfdeckel 18 vorgesehenen Eintrittsstutzen 36 befestigt ist. Der Eintrittsstutzen 36 ist so am Zylinderkopfdeckel 18 angeordnet, dass er unmittelbar neben der Eintrittsöffnung 30 der Ölabscheidekammer 22 in den durch den Zylinderkopfdeckel 18 abgeschlossenen Nockenwellenraum 17 einmündet. Die Ölabscheidekammer 22 steht über eine Austrittsöffnung 38 mit einem Spiral - Ölabscheider 40 in Verbindung. Auf dem Spiral - Ölabscheider 40 ist ein Druckregler 42 aufgesetzt, der ggf. den Unterdruck im Kurbelgehäuseraum gegenüber dem in der Sauganlage vorherrschenden Unterdruck reduziert. Der Druckregler 42 weist einen Ausgangsstutzen 44 auf, an den eine Leitung 46 angeschlossen ist, die zum Saugrohr der nicht dargestellten Sauganlage der Brennkraftmaschine führt.In or on the cylinder head covers 16, 18 of the two rows of cylinder banks 1 to 4 or 5 to 8 devices for crankcase ventilation are provided, the following are described in more detail. Basically, the combustion or Compression stroke in blow-by gases which pass into the crankcase space of the internal combustion engine via ventilation paths (not shown) integrated in the motor housing in the Camshaft chamber 17 passed from where it from the intake tract of the internal combustion engine be fed again. For this purpose, there is one in each cylinder head cover 16, 18 Oil separation chamber 20 and 22 integrated, opposite the camshaft space 17th is completed by a cover 24 or 26. Both oil separation chambers 20, 22 each have an inlet opening 28 and 30 through which the blow-by gases into the Oil separation chamber 20 or 22 can enter. The one on the cylinder head cover 16 provided connector 32 forms the outlet opening for the oil separation chamber 20. How 2 can be seen, a vent or at the outlet 32 Connection line 34 connected, which leads to the cylinder head cover 18 and their the other end at an inlet connection 36 provided on the cylinder head cover 18 is attached. The inlet connector 36 is arranged on the cylinder head cover 18 so that it directly next to the inlet opening 30 of the oil separation chamber 22 in the through the Cylinder head cover 18 opens the closed camshaft space 17. The Oil separation chamber 22 is located above an outlet opening 38 with a spiral - Oil separator 40 in connection. A pressure regulator 42 is located on the spiral oil separator 40 attached, which, if necessary, the negative pressure in the crankcase compared to that in the Suction system prevailing vacuum reduced. The pressure regulator 42 has one Output nozzle 44, to which a line 46 is connected, to the intake manifold leads the suction system of the internal combustion engine, not shown.

Beide Ölabscheidekammern 20, 22 weisen darüber hinaus an ihren Deckelrändern Öffnungen 48 auf, über die in der Ölabscheidekammer 20, 22 befindliches Schmieröl in den Nockenwellenraum 17 übertreten kann. Des weiteren können in den Ölabscheidekammern 20 und 22 als Labyrinth fungierende Trennwände 50 (strichliniert dargestellt) angeordnet sein. Wie insbesondere aus Fig. 5 und 6 ersichtlich ist zu den beiden Eintrittsöffnungen 28 und 30 beabstandet, eine Trennrippe 52 bzw. 54 vorgesehen. Die beiden Rippen 52 und 54 verhindern, dass Schmieröl der auf dieser Höhe vorgesehenen Nockenwellenlager - Schmierölversorgung über die Öffnungen 28 und 30 in die Ölabscheidekammern 20 und 22 gelangt. In der Mitte der beiden Zylinderkopfdeckel 16, 18 erstreckt sich -in Längsrichtung gesehen- jeweils eine Mittelrippe 56, 58. Durch die Mittelrippe 56, 58 wird zusätzlich die im Zylinderkopfdeckelbereich 16a, 18a angeordnete Ölabscheidekammer 20, 22 abgeschottet und verhindert, daß aufgrund der im Zylinderkopfdeckelbereich 16b, 18b rotierenden Auslaßnockenwelle 11, 12 Schmieröl in den Zylinderkopfdeckelbereich 16a, 18a geschleudert wird. Both oil separation chambers 20, 22 also have at their lid edges Openings 48 through which the lubricating oil located in the oil separation chamber 20, 22 can cross the camshaft chamber 17. Furthermore, in the Oil separating chambers 20 and 22 partition walls 50 (dashed lines) which act as a labyrinth shown). As can be seen in particular from FIGS. 5 and 6, the spaced between the two inlet openings 28 and 30, a separating rib 52 and 54, respectively intended. The two ribs 52 and 54 prevent the lubricating oil from on this The intended camshaft bearing height - supply of lubricating oil via openings 28 and 30 gets into the oil separation chambers 20 and 22. In the middle of the two Cylinder head covers 16, 18 each extend in the longitudinal direction Middle rib 56, 58. Through the middle rib 56, 58 is additionally in Cylinder head cover area 16a, 18a arranged oil separation chamber 20, 22 sealed off and prevents that due to the in the cylinder head cover area 16b, 18b rotating exhaust camshaft 11, 12 lubricating oil in the cylinder head cover area 16a, 18a is thrown.

Im folgenden wird der Entlüftungsweg für die Blow-By-Gase beschrieben, nach dem sie vom Kurbelgehäuseraum in den Nockenwellenraum 17 überführt worden sind:The ventilation path for the blow-by gases after which they are described is described below have been transferred from the crankcase space to the camshaft space 17:

Die Blow-By-Gase der linken Zylinderbankreihe 1 bis 4 werden aufgrund der im Saugrohr herrschenden Unterdruckverhältnisse über die Öffnung 28 in die Ölabscheidekammer 20 geführt. In der Ölabscheidekammer 20 kann ein Teil des von den Blow-By-Gasen mitgeführten Schmieröls abgeschieden werden, das wiederum insbesondere im instationären Betrieb (Beschleunigen, Abbremsen) über die Öffnungen 48 in den Nockenwellenraum 17 zurückgelangt. Die Blow-By-Gase werden dann über die Verbindungs- bzw. Entlüftungsleitung 34 auf die rechte Zylinderbankreihe 5 bis 8 in den Zylinderkopfdeckel 18 überführt. Dort treten sie in den Nockenwellenraum 17 ein und werden über die Öffnung 30 zusammen mit den Blow-By-Gasen aus der rechten Zylinderbankreihe in die zweite Ölabscheidekammer 22 geführt. Auch dort wird ein Teil der mitgerissenen Ölbestandteile abgeschieden, die wiederum über die Öffnungen 48 in den Nockenwellenraum 17 der rechten Zylinderbankreihe abgeführt werden können. Schlussendlich gelangen die vorgereinigten Blow-By-Gase zum Spiral - Ölabscheider 40 und von dort aus gereinigt über den Druckregler 42 sowie über die Leitung 46 in das Saugrohr und damit in die Sauganlage der Brennkraftmaschine zurück. Die beiden Ölabscheidekammern 20 und 22 sind so in den beiden Zylinderkopfdeckeln 16 und 18 integriert, dass die beiden Eintrittsöffnungen 28 und 30 im wesentlichen in der Mitte der Zylinderkopfdeckel 16 und 18, bezogen auf ihre Längserstreckung, angeordnet sind. Damit ist eine zuverlässige Kurbelgehäuseentlüftung auch bei Berg- bzw. Talfahrten des Fahrzeuges sicher gestellt.The blow-by gases of the left bank of cylinders 1 to 4 are due to the in the intake manifold prevailing vacuum conditions via the opening 28 into the oil separation chamber 20 guided. A part of the blow-by gases can be in the oil separation chamber 20 entrained lubricating oil are deposited, which in turn in particular transient operation (acceleration, braking) via the openings 48 in the Camshaft space 17 returned. The blow-by gases are then over the Connection or ventilation line 34 to the right bank of cylinders 5 to 8 in the Cylinder head cover 18 transferred. There they enter the camshaft space 17 and are via the opening 30 together with the blow-by gases from the right Row of cylinder banks led into the second oil separation chamber 22. There is also a part the entrained oil components separated, which in turn through the openings 48 in the camshaft chamber 17 of the right bank of cylinders can be removed. Finally, the pre-cleaned blow-by gases reach the spiral oil separator 40 and cleaned from there via the pressure regulator 42 and via line 46 in the Intake pipe and thus back into the intake system of the internal combustion engine. The two Oil separation chambers 20 and 22 are thus in the two cylinder head covers 16 and 18 integrated that the two inlet openings 28 and 30 substantially in the middle of the Cylinder head covers 16 and 18 are arranged in relation to their longitudinal extent. This ensures reliable crankcase ventilation even when driving uphill or downhill Vehicle.

Claims (5)

Brennkraftmaschine mit mindestens Zylinderbankreihen, deren Zylinderköpfe durch Zylinderkopfdeckel abgeschlossen sind, wobei zur Kurbelgehäuseentlüftung der sog. Blow-By-Gase an den Zylinderkopfdeckeln Entlüftungsleitungen angeschlossen sind, die mit einer Unterdruckquelle, z. B. einem Saugrohr, verbunden sind, und dass auf der Innenseite der Zylinderkopfdeckel Mittel zum Vorabscheiden von Öl aus den Blow-By-Gasen vorgesehen sind, dadurch gekennzeichnet, dass als Teil der Kurbelgehäuseentlüftung in den Zylinderkopfdeckeln (16, 18) jeweils eine mit einer Ein- und Austrittsöffnung (28, 30, 32, 38) versehene Ölabscheidekammer (20, 22) vorgesehen ist, wobei die Ölabscheidekammern (20, 22) über ihre Eintrittsöffnungen (28, 30) mit dem jeweiligen Nockenwellenraum (17) in Verbindung stehen.Internal combustion engine with at least rows of cylinder banks, the cylinder heads of which are closed by cylinder head covers, wherein for the crankcase ventilation of the so-called blow-by gases, ventilation lines are connected to the cylinder head covers, which are connected to a vacuum source, e.g. B. an intake manifold, and that on the inside of the cylinder head cover means for pre-separating oil from the blow-by gases are provided, characterized in that as part of the crankcase ventilation in the cylinder head covers (16, 18) each with a An oil separation chamber (20, 22) provided with an inlet and outlet opening (28, 30, 32, 38) is provided, the oil separation chambers (20, 22) being connected to the respective camshaft space (17) via their inlet openings (28, 30). Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Ölabscheidekammer (20, 22) so im Zylinderkopfdeckel (16, 18) integriert ist, dass die Eintrittsöffnung (28, 30) der Ölabscheidekammer (20, 22) im wesentlichen in der Mitte des Zylinderkopfdeckels (16, 18), bezogen auf seine Längserstreckung, angeordnet ist.Internal combustion engine according to claim 1, characterized in that the oil separating chamber (20, 22) is integrated in the cylinder head cover (16, 18) such that the inlet opening (28, 30) of the oil separating chamber (20, 22) essentially in the middle of the cylinder head cover ( 16, 18), based on its longitudinal extent. Brennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Ölabscheidekammer (20, 22) durch einen separaten Deckel (24, 26) verschlossen ist.Internal combustion engine according to claim 1 or 2, characterized in that the oil separation chamber (20, 22) is closed by a separate cover (24, 26). Brennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Austrittsöffnung (38) der zweiten Ölabscheidekammer (22) zu einem im Zylinderkopfdeckel (18) integrierten Ölabscheider (40) führt.Internal combustion engine according to one of the preceding claims, characterized in that the outlet opening (38) of the second oil separation chamber (22) leads to an oil separator (40) integrated in the cylinder head cover (18). Kurbelgehäuseentlüftung nach Anspruch 4, dadurch gekennzeichnet, dass am Ölabscheider (40) ein Druckregler (42) befestigt ist, dessen Ausgang zum Saugrohr der Brennkraftmaschine führt.Crankcase ventilation according to claim 4, characterized in that a pressure regulator (42) is attached to the oil separator (40), the output of which leads to the intake manifold of the internal combustion engine.
EP02020994A 2001-11-07 2002-09-20 Engine with at least two cylinder banks Expired - Lifetime EP1310637B1 (en)

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DE10154669 2001-11-07
DE10154669A DE10154669A1 (en) 2001-11-07 2001-11-07 Internal combustion engine with at least two rows of cylinder banks

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EP1310637A2 true EP1310637A2 (en) 2003-05-14
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EP1310637B1 (en) 2006-11-22
US6880506B2 (en) 2005-04-19
ATE346224T1 (en) 2006-12-15
DE50208762D1 (en) 2007-01-04
JP2003184534A (en) 2003-07-03
DE10154669A1 (en) 2003-05-22
EP1310637A3 (en) 2004-01-14
US20030089323A1 (en) 2003-05-15

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