EP1310637B1 - Engine with at least two cylinder banks - Google Patents

Engine with at least two cylinder banks Download PDF

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Publication number
EP1310637B1
EP1310637B1 EP02020994A EP02020994A EP1310637B1 EP 1310637 B1 EP1310637 B1 EP 1310637B1 EP 02020994 A EP02020994 A EP 02020994A EP 02020994 A EP02020994 A EP 02020994A EP 1310637 B1 EP1310637 B1 EP 1310637B1
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EP
European Patent Office
Prior art keywords
oil separation
separation chamber
cylinder
oil
cylinder head
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.)
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EP02020994A
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German (de)
French (fr)
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EP1310637A3 (en
EP1310637A2 (en
Inventor
Werner Gschwindt
Thomas Wasserbäch
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Dr Ing HCF Porsche AG
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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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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 having at least two rows of cylinder banks according to the preamble of claim 1.
  • crankcase ventilation for a multi-row internal combustion engine to the effect that in the crankcase ventilation the blow-by gases effectively entrained entrained oil and on the other hand, the cost of externally guided vent lines is reduced.
  • the crankcase ventilation should be ensured even when driving uphill or downhill of the vehicle.
  • the ⁇ labscheidehunt is integrated in the cylinder head cover, that the inlet opening for the blow-by gases substantially in the middle of the cylinder head cover, based on its longitudinal extent, is arranged. This is ensured even when driving up and down the motor vehicle, that despite the lubricating oil located in the camshaft chamber, the crankcase ventilation is not affected by the ⁇ labscheidehunt.
  • the ⁇ labscheidehunt is advantageously constructed in two parts and consists of a shell-like bottom part, which is completed by a lid member.
  • another oil separator is provided, which, viewed in the flow direction of the blow-by gases, adjoins the second oil separator chamber integrated in the cylinder head cover.
  • a pressure regulator is mounted, the output of which leads via a connecting line to the intake manifold of the internal combustion engine.
  • the internal combustion engine designed as a V8 engine has two rows of cylinder banks 2 and 3, which are both integrated in a crankcase upper part 4 and adjoined by a crankcase lower part 5 configured as a crankshaft bearing bridge. Between the crankcase upper part 4 and the crankcase lower part 5, a crankshaft 6 is mounted accordingly.
  • the two rows of cylinder banks 2 and 3 have two cylinder heads 7 and 8, in which, inter alia, the inlet camshafts 9 and 10 required for controlling the intake and exhaust valves and the exhaust camshafts 11 and 12 are accommodated.
  • the intake camshafts 9, 10 and the exhaust camshafts 11, 12 are driven via a drive double gear arranged on the crankshaft 6 and a timing chain 14, a so-called duplex chain, designed as an endless drive.
  • Both cylinder heads 7 and 8 are closed at the top by a respective cylinder head cover 16 and 18.
  • a venting or connecting line 34 is connected to the outlet nozzle 32, which leads to the cylinder head cover 18 and the other end to a on the cylinder head cover 18th provided inlet nozzle 36 is attached.
  • the inlet nozzle 36 is arranged on the cylinder head cover 18 that it opens directly adjacent to the inlet opening 30 of the ⁇ labscheidehunt 22 in the closed by the cylinder head cover 18 camshaft space 17.
  • the ⁇ labscheidehunt 22 is connected via an outlet opening 38 with a spiral oil separator 40 in connection.
  • a pressure regulator 42 is placed, which possibly reduces the negative pressure in the crankcase space with respect to the prevailing in the suction negative pressure.
  • the pressure regulator 42 has an outlet port 44, to which a line 46 is connected, which leads to the intake manifold of the intake system, not shown, of the internal combustion engine.
  • both oil separation chambers 20, 22 have openings 48 at their lid edges, via which lubricating oil located in the oil separation chamber 20, 22 can pass into the camshaft space 17.
  • oil separation chambers 20 and 22 functioning as a labyrinth partition walls 50 (shown in phantom) may be arranged.
  • a separation rib 52 or 54 is provided at a distance from the two inlet openings 28 and 30. The two ribs 52 and 54 prevent lubricating oil of the camshaft bearing provided at this level - supply of lubricating oil through the openings 28 and 30 into the oil separation chambers 20 and 22.
  • blow-by gases of the left bank of cylinders 1 to 4 are guided via the opening 28 in the ⁇ labscheidehunt 20 due to the pressure prevailing in the intake manifold vacuum conditions.
  • a part of the entrained by the blow-by gases lubricating oil can be deposited, which in turn, especially in non-stationary operation (acceleration, deceleration) via the openings 48 in the camshaft space 17 back.
  • the blow-by gases are then transferred via the connecting or venting line 34 to the right bank of cylinders 5 to 8 in the cylinder head cover 18. There they enter into the camshaft space 17 and are guided via the opening 30 together with the blow-by gases from the right cylinder bank row into the second oil separation chamber 22.
  • the two ⁇ labscheideschn 20 and 22 are integrated in the two cylinder head covers 16 and 18, that the two inlet openings 28 and 30 are arranged substantially in the middle of the cylinder head cover 16 and 18, based on their longitudinal extent. For a reliable crankcase ventilation is ensured even when driving uphill or downhill of the vehicle.

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 having 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. Ein weiteres Beispiel ist aus der US 4,958, 613 bekannt.From US-PS 3,908,617 a device for crankcase ventilation of a double-row internal combustion engine is known in which located on the cylinder head housing or cylinder head cover vent lines located in the crankcase so-called. Blow-by gases are removed and fed back to the intake system of the internal combustion engine in a closed circuit , In addition, on the inside of the cylinder head cover sheet metal elements are attached, where the blow-by gases flow past and part of the entrained by the blow-by gases oil is deposited. Another example is known from US 4,958,613.

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 to improve the crankcase ventilation for a multi-row internal combustion engine to the effect that in the crankcase ventilation the blow-by gases effectively entrained entrained oil and on the other hand, the cost of externally guided vent lines is reduced. In addition, the crankcase ventilation should be ensured even when driving uphill or downhill of the 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 solved by the features of patent claim 1. By arranged in the cylinder head cover Ölabscheidekammern through which the blow-by gases are passed, already a part of the entrained oil can be deposited in these chambers. With the help of the separately formed Ölabscheidekammer the incoming blow-by gases can be "calmed down", so that oil fractions are deposited in the blow-by gases and possibly recycled through openings provided in a wall of the Ölabscheidekammer openings in the camshaft space.

Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten.Further, the invention ausgestaltende features are included 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 Ölabscheidekammer is integrated in the cylinder head cover, that the inlet opening for the blow-by gases substantially in the middle of the cylinder head cover, based on its longitudinal extent, is arranged. This is ensured even when driving up and down the motor vehicle, that despite the lubricating oil located in the camshaft chamber, the crankcase ventilation is not affected by the Ölabscheidekammer.

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

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.On a cylinder head cover, another oil separator is provided, which, viewed in the flow direction of the blow-by gases, adjoins the second oil separator chamber integrated in the cylinder head cover.

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.On the oil separator, a pressure regulator is mounted, the output of which leads via a connecting line to the intake manifold of the internal combustion engine. Thus, the prevailing in dependence on the load state of the internal combustion engine in the intake manifold vacuum can be adjusted to a suitable for the crankcase ventilation constant negative pressure value.

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

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 cover 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, which are both integrated in a crankcase upper part 4 and adjoined by a crankcase lower part 5 configured as a crankshaft bearing bridge. Between the crankcase upper part 4 and the crankcase lower part 5, a crankshaft 6 is mounted accordingly. The two rows of cylinder banks 2 and 3 have two cylinder heads 7 and 8, in which, inter alia, the inlet camshafts 9 and 10 required for controlling the intake and exhaust valves and the exhaust camshafts 11 and 12 are accommodated. The intake camshafts 9, 10 and the exhaust camshafts 11, 12 are driven via a drive double gear arranged on the crankshaft 6 and a timing chain 14, a so-called duplex chain, designed as an endless drive. Both cylinder heads 7 and 8 are closed at the top by a respective 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 and 5 to 8 devices for crankcase ventilation are provided, which are described in more detail below. In principle, the blow-by gases which pass through the crankcase chamber of the internal combustion engine during combustion or during the compression stroke are conducted into the camshaft space 17 via venting paths (not shown) integrated in the motor housing, from where they are supplied again from the intake tract of the internal combustion engine. For this purpose, an oil separation chamber 20 and 22 is integrated in each cylinder head cover 16, 18, which is closed relative to the camshaft space 17 by a cover 24 and 26 respectively. Both Ölabscheidekammern 20, 22 each have an inlet opening 28 and 30 through which the blow-by gases in the Oil separation chamber 20 and 22 can occur. As shown in Fig. 2, a venting or connecting line 34 is connected to the outlet nozzle 32, which leads to the cylinder head cover 18 and the other end to a on the cylinder head cover 18th provided inlet nozzle 36 is attached. The inlet nozzle 36 is arranged on the cylinder head cover 18 that it opens directly adjacent to the inlet opening 30 of the Ölabscheidekammer 22 in the closed by the cylinder head cover 18 camshaft space 17. The Ölabscheidekammer 22 is connected via an outlet opening 38 with a spiral oil separator 40 in connection. On the spiral - oil separator 40, a pressure regulator 42 is placed, which possibly reduces the negative pressure in the crankcase space with respect to the prevailing in the suction negative pressure. The pressure regulator 42 has an outlet port 44, to which a line 46 is connected, which leads to the intake manifold of the intake system, not shown, of the internal combustion engine.

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.Moreover, both oil separation chambers 20, 22 have openings 48 at their lid edges, via which lubricating oil located in the oil separation chamber 20, 22 can pass into the camshaft space 17. Further, in the oil separation chambers 20 and 22 functioning as a labyrinth partition walls 50 (shown in phantom) may be arranged. As can be seen in particular from FIGS. 5 and 6, a separation rib 52 or 54 is provided at a distance from the two inlet openings 28 and 30. The two ribs 52 and 54 prevent lubricating oil of the camshaft bearing provided at this level - supply of lubricating oil through the openings 28 and 30 into the oil separation chambers 20 and 22.

Im folgenden wird der Entlüftungsweg für die Blow-By-Gase beschrieben, nach dem sie vom Kurbelgehäuseraum in den Nockenwellenraum 17 überführt worden sind:The following describes the venting path for the blow-by gases, after which they have been transferred from the crankcase chamber into 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 guided via the opening 28 in the Ölabscheidekammer 20 due to the pressure prevailing in the intake manifold vacuum conditions. In the Ölabscheidekammer 20, a part of the entrained by the blow-by gases lubricating oil can be deposited, which in turn, especially in non-stationary operation (acceleration, deceleration) via the openings 48 in the camshaft space 17 back. The blow-by gases are then transferred via the connecting or venting line 34 to the right bank of cylinders 5 to 8 in the cylinder head cover 18. There they enter into the camshaft space 17 and are guided via the opening 30 together with the blow-by gases from the right cylinder bank row into the second oil separation chamber 22. There, too, a part of the entrained oil components is deposited, which in turn can be discharged via the openings 48 in the camshaft space 17 of the right bank of cylinders. Finally, the pre-cleaned blow-by gases get to the spiral oil separator 40 and from there cleaned via the pressure regulator 42 and via the line 46 in the intake manifold and thus back into the intake system of the internal combustion engine. The two Ölabscheidekammern 20 and 22 are integrated in the two cylinder head covers 16 and 18, that the two inlet openings 28 and 30 are arranged substantially in the middle of the cylinder head cover 16 and 18, based on their longitudinal extent. For a reliable crankcase ventilation is ensured even when driving uphill or downhill of the vehicle.

Claims (5)

  1. An internal-combustion engine with at least two banks of cylinders, the cylinder heads of which are closed by cylinder-head covers, wherein ventilation lines are attached to the cylinder-head covers for evacuation of the so-called blow-by gases from the crankcase and are connected to a vacuum source, e.g. an intake pipe, and means for the preliminary separation of oil from the blow-by gases are provided on the inside of the cylinder-head covers, wherein a respective oil separation chamber (20, 22) provided with an inlet and an outlet opening (28, 30, 32, 38) is provided in the cylinder-head covers (16, 18) as part of the crankcase ventilation system, wherein the oil separation chambers (20, 22) are connected to the respective camshaft chamber (17) via their inlet openings (28, 30), characterised in that the outlet opening (32) of at least a first oil separation chamber (20) is connected by a line (34) to an inlet connecting piece (36) which, adjacent to the inlet opening (30) of a second oil separation chamber (22), leads to the camshaft chamber (17) associated with this second oil separation chamber (22).
  2. An internal-combustion engine according to claim 1, characterised in that the oil separation chamber (20, 22) is integrated into the cylinder-head cover (16, 18) so that the inlet opening (28, 30) of the oil separation chamber (20, 22) is arranged substantially in the middle of the cylinder-head cover (16, 18) relative to its longitudinal extent.
  3. An internal-combustion engine according to claim 1 or 2, characterised in that the oil separation chamber (20, 22) is closed by a separate cover (24, 26).
  4. An internal-combustion engine according to any one of the preceding claims, characterised in that the outlet opening (38) of the second oil separation chamber (22) leads to an oil separator (40) integrated into the cylinder-head cover (18).
  5. Crankcase ventilation according to claim 4, characterised in that a pressure regulator (42), the outlet of which leads to the intake pipe of the internal-combustion engine, is fixed to the oil separator (40).
EP02020994A 2001-11-07 2002-09-20 Engine with at least two cylinder banks Expired - Lifetime EP1310637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10154669 2001-11-07
DE10154669A DE10154669A1 (en) 2001-11-07 2001-11-07 Internal combustion engine with at least two rows of cylinder banks

Publications (3)

Publication Number Publication Date
EP1310637A2 EP1310637A2 (en) 2003-05-14
EP1310637A3 EP1310637A3 (en) 2004-01-14
EP1310637B1 true EP1310637B1 (en) 2006-11-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02020994A Expired - Lifetime EP1310637B1 (en) 2001-11-07 2002-09-20 Engine with at least two cylinder banks

Country Status (5)

Country Link
US (1) US6880506B2 (en)
EP (1) EP1310637B1 (en)
JP (1) JP2003184534A (en)
AT (1) ATE346224T1 (en)
DE (2) DE10154669A1 (en)

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JP2004353505A (en) * 2003-05-28 2004-12-16 Petroliam Nasional Bhd Breather device for engine
DE102005006438A1 (en) 2005-02-12 2006-08-17 Dr.Ing.H.C. F. Porsche Ag Device for venting a crankcase of an internal combustion engine and internal combustion engine with in particular V-shaped arrangement of the cylinder
DE102006019880A1 (en) * 2006-04-28 2007-10-31 Audi Ag Motor housing cover for internal combustion engine, has inlet opening for exhaust medium that is conducted by exhaust system, and part of oil separator housing formed integrally with cover
DE102007006938A1 (en) * 2007-02-13 2008-08-14 Robert Bosch Gmbh Method and device for diagnosing a crankcase ventilation of an internal combustion engine
US8100100B2 (en) * 2008-08-19 2012-01-24 Turner Jr Price George Valve cover housing for internal combustion engines
JP2011080384A (en) * 2009-10-05 2011-04-21 Otics Corp Vehicle engine
US20110155084A1 (en) * 2009-12-30 2011-06-30 Scott Joseph Sargeant Upper cylinder head housing for use with an engine and method of making the same
JP2013124598A (en) * 2011-12-15 2013-06-24 Mahle Filter Systems Japan Corp Head cover of internal combustion engine
JP2013231385A (en) * 2012-04-27 2013-11-14 Yamaha Motor Co Ltd Engine and saddle-ride type vehicle
FR3026789B1 (en) * 2014-10-02 2016-11-04 Renault Sa INTERNAL COMBUSTION ENGINE HEAD COVER
CN108757211B (en) * 2018-06-29 2024-02-13 江苏科彤车业科技有限公司 Engine cylinder head cover with oil-gas separation device

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US3908617A (en) 1973-12-14 1975-09-30 Drexel C Partridge Total ventilating and scavenging system for an internal combustion engine
JPS61277814A (en) * 1985-06-03 1986-12-08 Honda Motor Co Ltd Blow-by gas resoluting apparatus
JPH0723531Y2 (en) * 1988-10-18 1995-05-31 日産自動車株式会社 Blow-by gas recirculation system for engines
US5069192A (en) * 1989-10-24 1991-12-03 Nissan Motor Company, Ltd. Internal combustion engine with crankcase ventilation system
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JP2000073734A (en) * 1998-08-26 2000-03-07 Sanshin Ind Co Ltd Four-cycle engine

Also Published As

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

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