EP0254816B1 - Crankcase ventilation in motor vehicles - Google Patents

Crankcase ventilation in motor vehicles Download PDF

Info

Publication number
EP0254816B1
EP0254816B1 EP87105943A EP87105943A EP0254816B1 EP 0254816 B1 EP0254816 B1 EP 0254816B1 EP 87105943 A EP87105943 A EP 87105943A EP 87105943 A EP87105943 A EP 87105943A EP 0254816 B1 EP0254816 B1 EP 0254816B1
Authority
EP
European Patent Office
Prior art keywords
crankcase
ventilation system
ventilation device
duct
connexion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87105943A
Other languages
German (de)
French (fr)
Other versions
EP0254816A3 (en
EP0254816A2 (en
Inventor
Karl Dipl.-Ing. Langlois
Manfred Dipl.-Ing. Batzill
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0254816A2 publication Critical patent/EP0254816A2/en
Publication of EP0254816A3 publication Critical patent/EP0254816A3/en
Application granted granted Critical
Publication of EP0254816B1 publication Critical patent/EP0254816B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F01M13/025—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction with an inlet-conduit via an air-filter
    • 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
    • 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

Definitions

  • the invention relates to a crankcase ventilation in motor vehicles, in which the crankcase gases are returned via a main ventilation system or a safety ventilation system from the cylinder crankcase to an intake system of an internal combustion engine, connecting pieces being arranged on an air guide housing of the intake system, to which lines of the main ventilation system and the safety ventilation system are connected.
  • crankcase ventilation Service Information 1985, Porsche 928 S, USA, pages 30 and 31
  • two spaced-apart connecting pieces are provided on the air duct housing of the intake system, one connecting piece with the line of the main ventilation system and the other connecting piece is connected to the line of the safety ventilation system.
  • This crankcase ventilation has a good function, but the air duct housing with the two connecting pieces is complex to construct.
  • the two connecting pieces on the air duct housing take up a considerable amount of space, so that the space constraints, which are in any case restricted in particular in the area of the intake system of a 4-valve engine, are additionally restricted.
  • the object of the invention is to take such precautions on a crankcase ventilation that the connection between the lines of the two systems and the air duct housing is simplified in construction and also takes up little space.
  • the main advantages achieved with the invention are that the arrangement of only one connector for the lines of both systems creates a simple, space-saving connection between the lines and the air duct housing.
  • the separate channels within the connecting piece for the two systems and the staggered outlet openings ensure that the crankcase ventilation functions properly. If the outlet opening of the main ventilation system is blocked, for example by icing, the safety ventilation system with the outlet opening protruding into the interior of the air duct housing takes over the crankcase ventilation until the overgrown connection of the main ventilation system in the air duct housing has become permeable again after the engine operating temperature or a sufficient engine compartment temperature has been reached .
  • the connector can be produced easily and inexpensively.
  • the snap-in connection between the connecting piece and the socket of the air duct housing ensures quick and easy assembly of the connecting piece.
  • a multi-cylinder internal combustion engine 1 for a motor vehicle comprises a cylinder head 2 and a cylinder crankcase 3.
  • a crankcase ventilation 5 is provided, which is composed of a main ventilation system 6 and a safety ventilation system 7.
  • crankcase gases (blow-by gases) pass from the cylinder crankcase 3 into an oil filler neck 8. Then they pass through a line 9, which is connected via an angled connection 10 to a cylinder head cover 11 and penetrates it.
  • An oil separator (not shown in more detail) is provided within the cylinder head cover 11 between the two middle cylinders. After flowing through this oil separator, the crankcase gases pass via a further angle connection 12 and a line 13 arranged outside the cylinder head cover to a connecting piece 14 which is arranged on an air guide housing 15 of the intake system 4.
  • a throttle is inserted within the angle connection 12.
  • the overpressure in the cylinder crankcase 3 increases due to a lack of pressure compensation and the safety ventilation system 7 is activated.
  • the crankcase gases enter the oil filler neck 8 via an opening (not shown) of the cylinder crankcase 3.
  • a safety valve is inserted into a connection of the oil filler neck 8, which opens at an overpressure of 80 to 100 mbar.
  • the safety valve is open, the crankcase gases flow via a line 17 directly to the air duct housing 15 (FIG. 2).
  • a common connecting piece 14 with connecting pieces 18, 19 for the lines 13, 17 of the two systems 6, 7 (main ventilation system and safety ventilation system) is provided on the air guide housing 15 hen, separate channels 20, 21 are led away from the two connecting pieces 18, 19, which extend to distant outlet openings 22, 23.
  • the two connecting pieces 18, 19 run at an angle to one another.
  • the outlet openings 22, 23 of the two channels 20, 21, viewed in the direction of flow B, run at a distance A from one another and open into the air duct housing 15.
  • the cross section of the channel 21 is seen over its entire longitudinal extent, constant.
  • the channel 20 of the main ventilation system 6 partially surrounds the channel 21 of the safety ventilation system 7, the two channels 20, 21 being arranged eccentrically to one another. Wall sections of the inner channel 21 and the outer channel 20 are brought together at 25.
  • the outer channel 20 has an approximately crescent-shaped cross section (FIG. 4).
  • the connecting piece 18 of the main ventilation system 6 runs at an angle to the adjoining duct 20, the side 26 of the duct 20 opposite the outlet opening 22 being designed to be closed.
  • the outlet opening 22 of the main ventilation system 6 is seen in the direction of flow B, arranged in front of the outlet opening 23 of the safety ventilation system 7, in such a way that the outlet opening 22 of the main ventilation system 6 extends in the region of a connecting piece 27 of the air guide housing 15.
  • the outlet opening 23 of the safety ventilation system 7 runs approximately parallel to an inner boundary wall 28 of the air duct housing 15.
  • the approximately Y-shaped connecting piece 14 is inserted into the molded connection piece 27 of the air duct housing 15 and connects to it via a snap-in connection 29.
  • the latching connection 29 comprises grooved projections 30 on the connecting piece 14, which engage in corresponding recesses 31 in the connecting piece 27.
  • the air guide housing 15 is formed by a nozzle-shaped air guide hood 32, which is arranged between an air mass meter and a throttle valve connector, namely below a throttle valve, not shown.

Description

Die Erfindung betrifft eine Kurbelgehäuseentlüftung in Kraftfahrzeugen, bei der die Kurbelgehäusegase uber ein Hauptentlüftungssystem bzw. ein Sicherheitsentlüftungssystem vom Zylinderkurbelgehäuse in ein Ansaugsystem einer Brennkraftmaschine zurückgeführt werden, wobei an einem Luftführungsgehäuse des Ansaugsystems Verbindungsstücke angeordnet sind, an die Leitungen des Hauptentlüftungssystems und des Sicherheitsentlüftungssystems angeschlossen sind.The invention relates to a crankcase ventilation in motor vehicles, in which the crankcase gases are returned via a main ventilation system or a safety ventilation system from the cylinder crankcase to an intake system of an internal combustion engine, connecting pieces being arranged on an air guide housing of the intake system, to which lines of the main ventilation system and the safety ventilation system are connected.

Bei einer bekannten Kurbelgehäuseentlüftung (Service-Information 1985, Porsche 928 S, USA, Seiten 30 und 31) der eingangs genannten Gattung sind am Luftführungsgehäuse des Ansaugsystems zwei mit Abstand zueinander angeordnete Verbindungsstücke vorgesehen, wobei ein Verbindungsstück mit der Leitung des Hauptentlüftungssystems und das andere Verbindungsstück mit der Leitung des Sicherheitsentlüftungssystems verbunden ist. Diese Kurbelgehäuseentlüftung weist eine gute Funktion auf, jedoch ist das Luftführungsgehäuse mit den beiden Verbindungsstücken im Aufbau aufwendig. Außerdem beanspruchen die beiden Verbindungsstücke am Luftführungsgehäuse einen erheblichen Bauraum, so daß die insbesondere im Bereich des Ansaugsystems eines 4-Ventil-Motors ohnehin beengten Platzverhältnisse zusätzlich eingeschränkt werden.In a known crankcase ventilation (Service Information 1985, Porsche 928 S, USA, pages 30 and 31) of the type mentioned at the beginning, two spaced-apart connecting pieces are provided on the air duct housing of the intake system, one connecting piece with the line of the main ventilation system and the other connecting piece is connected to the line of the safety ventilation system. This crankcase ventilation has a good function, but the air duct housing with the two connecting pieces is complex to construct. In addition, the two connecting pieces on the air duct housing take up a considerable amount of space, so that the space constraints, which are in any case restricted in particular in the area of the intake system of a 4-valve engine, are additionally restricted.

Aufgabe der Erfindung ist es, an einer Kurbelgehäuseentlüftung solche Vorkehrungen zu treffen, daß die Verbindung zwischen den Leitungen der beiden Systeme und dem Luftführungsgehäuse im Aufbau vereinfacht wird und außerdem wenig Bauraum beansprucht.The object of the invention is to take such precautions on a crankcase ventilation that the connection between the lines of the two systems and the air duct housing is simplified in construction and also takes up little space.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung in vorteilhafter Weise ausgestaltende Merkmale enthalten die Unteransprüche.According to the invention, this object is achieved by the characterizing features of claim 1. Further features which advantageously design the invention contain the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß durch die Anordnung von lediglich einem Verbindungsstück für die Leitungen beider Systeme eine einfache, platzsparende Verbindung zwischen den Leitungen und dem Luftführungsgehäuse geschaffen wird. Durch die getrennten Kanäle innerhalb des Verbindungsstückes für die beiden Systeme und die versetzt zueinander angeordneten Austrittsöffnungen wird eine gute Funktion der Kurbelgehäuseentlüftung erreicht. Wenn die Austrittsöffnung des Hauptentlüftungssystems beispielsweise durch Vereisung zugesetzt ist, übernimmt das Sicherheitsentlüftungssystem mit der abschnittsweise in das Innere des Luftführungsgehäuses hineinragenden Austrittsöffnung so lange die Kurbelgehäuseentlüftung, bis der zugewachsene Anschluß des Hauptentlüftungssystems im Luftführungsgehäuse nach Erreichen der Motorbetriebstemperatur bzw. einer ausreichenden Motorraumtemperatur wieder durchlässig geworden ist. Das Verbindungsstück läßt sich einfach und kostengünstig herstellen. Durch die Rastverbindung zwischen dem Verbindungsstück und dem Stutzen des Luftführungsgehäuses ist eine schnelle und einfache Montage des Verbindungsstückes gewährleistet.The main advantages achieved with the invention are that the arrangement of only one connector for the lines of both systems creates a simple, space-saving connection between the lines and the air duct housing. The separate channels within the connecting piece for the two systems and the staggered outlet openings ensure that the crankcase ventilation functions properly. If the outlet opening of the main ventilation system is blocked, for example by icing, the safety ventilation system with the outlet opening protruding into the interior of the air duct housing takes over the crankcase ventilation until the overgrown connection of the main ventilation system in the air duct housing has become permeable again after the engine operating temperature or a sufficient engine compartment temperature has been reached . The connector can be produced easily and inexpensively. The snap-in connection between the connecting piece and the socket of the air duct housing ensures quick and easy assembly of the connecting piece.

Ein Auführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An exemplary embodiment of the invention is shown in the drawing and is explained in more detail below.

Es zeigt

  • Fig. 1 eine Stirnansicht einer Brennkraftmaschine mit einer Kurbelgehäuseentlüftung,
  • Fig. 2 eine schematische Ansicht von oben auf die Kurbelgehäuseentlüftung,
  • Fig. 3 einen Schnitt nach der Linie 111-111 der Fig. 2,
  • Fig. 4 einen Schnitt nach der Linie IV-IV der Fig. 3.
It shows
  • 1 is an end view of an internal combustion engine with a crankcase ventilation,
  • 2 is a schematic top view of the crankcase ventilation,
  • 3 shows a section along the line 111-111 of FIG. 2,
  • 4 shows a section along the line IV-IV of FIG. 3rd

Eine mehrzylindrige Brennkraftmaschine 1 für ein Kraftfahrzeug umfaßt einen Zylinderkopf 2 und ein Zylinderkurbelgehäuse 3. Zur Rückführung der Kurbelgehäusegase vom Zylinderkurbelgehäuse 3 in ein Ansaugsystem 4 der Brennkraftmaschine 1 ist eine Kurbelgehäuseentlüftung 5 vorgesehen, die sich aus einem Hauptentlüftungssystem 6 und einem Sicherheitsentlüftungssystem 7 zusammensetzt.A multi-cylinder internal combustion engine 1 for a motor vehicle comprises a cylinder head 2 and a cylinder crankcase 3. To return the crankcase gases from the cylinder crankcase 3 to an intake system 4 of the internal combustion engine 1, a crankcase ventilation 5 is provided, which is composed of a main ventilation system 6 and a safety ventilation system 7.

Beim Hauptentlüftungssystem 6 gelangen die Kurbelgehäusegase (Blow-by-Gase) vom Zylinderkurbelgehäuse 3 in einen Öleinfüllstutzen 8. Danach passieren sie eine Leitung 9, die über einen Winkelanschluß 10 mit einen Zylinderkopfdeckel 11 verbunden ist und diesen durchdringt. Innerhalb des Zylinderkopfdeckels 11 ist zwischen den beiden mittleren Zylindern ein nicht näher dargestellter Ölabscheider vorgesehen. Nach Durchströmen dieses Ölabscheiders gelangen die Kurbelgehäusegase über einen weiteren Winkelanschluß 12 und eine außerhalb des Zylinderkopfdeckels angeordnete Leitung 13 zu einem Verbindungsstück 14, das an einem Luftführungsgehäuse 15 des Ansaugsystems 4 angeordnet ist. Innerhalb des Winkelanschlusses 12 ist eine nicht gezeigte Drossel eingesetzt.In the main ventilation system 6, the crankcase gases (blow-by gases) pass from the cylinder crankcase 3 into an oil filler neck 8. Then they pass through a line 9, which is connected via an angled connection 10 to a cylinder head cover 11 and penetrates it. An oil separator (not shown in more detail) is provided within the cylinder head cover 11 between the two middle cylinders. After flowing through this oil separator, the crankcase gases pass via a further angle connection 12 and a line 13 arranged outside the cylinder head cover to a connecting piece 14 which is arranged on an air guide housing 15 of the intake system 4. A throttle, not shown, is inserted within the angle connection 12.

Fällt das Hauptentlüftungssystem 6 beispielsweise durch Vereisung (= Zuwachsen de Drosselbohrung und/oder de Austrittsöffnung des Verbindungsstückes) aus, dann steigt mangels Druckausgleichs der Überdruck im Zylinderkurbelgehäuse 3 und das Sicherheitsentlüftungssystem 7 wird aktiviert. Beim Sicherheitsentlüftungssystem 7 gelangen die Kurbelgehäusegase über eine nicht dargestellte Öffnung des Zylinderkurbelgehäuses 3 in den Öleinfüllstutzen 8. Bei 16 ist in einen Anschluß des Öleinfüllstutzens 8 ein Sicherheitsventil eingesetzt, das bei einem Überdruck von 80 bis 100 mbar öffnet. Bei geöffnetem Sicherheitsventil strömen die Kurbelgehäusegase über eine Leitung 17 direkt zum Luftführungsgehäuse 15 (Fig. 2).If the main ventilation system 6 fails, for example due to icing (= growth of the throttle bore and / or the outlet opening of the connecting piece), the overpressure in the cylinder crankcase 3 increases due to a lack of pressure compensation and the safety ventilation system 7 is activated. In the safety ventilation system 7, the crankcase gases enter the oil filler neck 8 via an opening (not shown) of the cylinder crankcase 3. At 16, a safety valve is inserted into a connection of the oil filler neck 8, which opens at an overpressure of 80 to 100 mbar. When the safety valve is open, the crankcase gases flow via a line 17 directly to the air duct housing 15 (FIG. 2).

Gemäß den Fig. 2 und 3 ist am Luftführungsgehäuse 15 ein gemeinsames Verbindungsstück 14 mit Anschlußstutzen 18, 19 für die Leitungen 13, 17 der beiden Systeme 6, 7 (Hauptentüftungssystem und Sicherheitentlüftungssystem) vorgesehen, wobei von den beiden Anschlußstutzen 18,19 getrennte Kanäle 20, 21 weggeführt sind, die sich zu entfernt angeordneten Austrittsöffnungen 22, 23 erstrecken. Die beiden Anschlußstutzen 18, 19 verlaufen unter einem Winkel zueinander. Die Austrittsöffnungen 22,23 der beiden Kanäle 20, 21 verlaufen in Strömungsrichtung B gesehen, mit Abstand A zueinander und münden in das Luftführungsgehäuse 15 ein. Der einen geradlinigen Formverlauf aufweisende Kanal 21 des Sicherheitsentlüftungsventils 7 verläuft in Fortsetzung des Anschlußstutzens 19 und ragt mit seinem freien, die Eintrittsöffnung 23 enthaltenden Ende abschnittsweise in den Innenraum 24 des Luftführungsgehäuses 15 hinein. Der Querschnitt des Kanals 21 ist über seine gesamte Längserstrekkung gesehen, gleichbleibend. Der Kanal 20 des Hauptentlüftungssystems 6 umgibt den Kanal 21 des Sicherheitsentlüftungssystems 7 anschnittsweise, wobei die beiden Kanäle 20,21 exzentrisch zueinander angeordnet sind. Wandabschnitte des innenliegenden Kanals 21 und des außenliegenden Kanals 20 sind bei 25 zusammengeführt. Der außenliegende Kanal 20 weist einen etwa sichelförmigen Querschnitt auf (Fig. 4).2 and 3, a common connecting piece 14 with connecting pieces 18, 19 for the lines 13, 17 of the two systems 6, 7 (main ventilation system and safety ventilation system) is provided on the air guide housing 15 hen, separate channels 20, 21 are led away from the two connecting pieces 18, 19, which extend to distant outlet openings 22, 23. The two connecting pieces 18, 19 run at an angle to one another. The outlet openings 22, 23 of the two channels 20, 21, viewed in the direction of flow B, run at a distance A from one another and open into the air duct housing 15. The channel 21 of the safety ventilation valve 7, which has a linear shape, extends in continuation of the connecting piece 19 and, with its free end containing the inlet opening 23, projects in sections into the interior 24 of the air duct housing 15. The cross section of the channel 21 is seen over its entire longitudinal extent, constant. The channel 20 of the main ventilation system 6 partially surrounds the channel 21 of the safety ventilation system 7, the two channels 20, 21 being arranged eccentrically to one another. Wall sections of the inner channel 21 and the outer channel 20 are brought together at 25. The outer channel 20 has an approximately crescent-shaped cross section (FIG. 4).

Der Anschlußstutzen 18 des Hauptentlüftungssystems 6 verläuft unter einem Winkel zum anschließenden Kanal 20, wobei die der Austrittsöffnung 22 gegenüberliegende Seite 26 des Kanals 20 geschlossen ausgebildet ist. Die Austrittsöffnung 22 des Hauptentlüftungssystems 6 ist in Strömungrichtung B gesehen, vor der Austrittsöffnung 23 des Sicherheitsentlüftungssystem 7 angeordnet, dergestalt, daß sich die Austrittsöffnung 22 des Hauptentlüftungssystems 6 im Bereich eines Stutzens 27 des Luftführungsgehäuses 15 erstreckt. Die Austrittsöffnung 23 des Sicherheitsentlüftungssystem 7 verläuft etwa parallel zu einer inneren Begrenzungswand 28 des Luftführungsgehäuses 15. Das etwa Y-förmig ausgebildete Verbindungsstück 14 ist in den angeformten Stutzen 27 des Luftführungsgehäuses 15 eingesetzt und über eine Rastverbindung 29 mit diesem verbinden. Die Rastverbindung 29 umfaßt rillenbförmige Anformungen 30 am Verbindungsstück 14, die in korrespondierende Ausnehmungen 31 des Stutzens 27 eingreifen. Das Luftführungsgehäuse 15 wird durch eine stutzenförmig ausgebildete Luftführungshutze 32 gebildet, die zwischen einem Luftmassenmesser und einem Drosselklappenstutzen angeordnet ist, und zwar unterhalb eine nicht gezeigten Drosselklappe.The connecting piece 18 of the main ventilation system 6 runs at an angle to the adjoining duct 20, the side 26 of the duct 20 opposite the outlet opening 22 being designed to be closed. The outlet opening 22 of the main ventilation system 6 is seen in the direction of flow B, arranged in front of the outlet opening 23 of the safety ventilation system 7, in such a way that the outlet opening 22 of the main ventilation system 6 extends in the region of a connecting piece 27 of the air guide housing 15. The outlet opening 23 of the safety ventilation system 7 runs approximately parallel to an inner boundary wall 28 of the air duct housing 15. The approximately Y-shaped connecting piece 14 is inserted into the molded connection piece 27 of the air duct housing 15 and connects to it via a snap-in connection 29. The latching connection 29 comprises grooved projections 30 on the connecting piece 14, which engage in corresponding recesses 31 in the connecting piece 27. The air guide housing 15 is formed by a nozzle-shaped air guide hood 32, which is arranged between an air mass meter and a throttle valve connector, namely below a throttle valve, not shown.

Claims (13)

1. A crankcase ventilation device (5) in motor vehicles, in which the crankcase gases are fed back from the cylinder crankcase (3) into an induction system (4) of an internal combustion engine (3) by way of a main ventilation system (6) or a safety ventilation system (7) respectively, connexion members (14), to which are attached lines (13, 17) of the main ventilation system (6) and the safety ventilation system (7), being arranged on an air-guide casing (15) of the induction system (4), characterized in that a common connexion member (14) with connexion sockets (18, 19) for the lines (13, 17) of the two systems (6, 7) is provided on the air-guide casing (15), and separate ducts (20, 21) extending to outlet openings (22, 23) arranged at a distance are directed away from the connexion sockets (18, 19), the outlet openings (22, 23) of the ducts (20, 21) extending at a distance (A) from one another, as viewed in the flow direction (B), and opening into the air-guide casing (15).
2. A crankcase ventilation device according to Claim 1, characterized in that the connexion member (14) is made approximately Y-shaped.
3. A crankcase ventilation device according to Claim 1, characterized in that the duct (21) of the safety ventilation system (7) extends as a continuation of the associated connexion socket (19) and has a straight shape.
4. A crankcase ventilation device according to Claim 1, characterized in that the duct (20) of the main ventilation system (6) partly surrounds the duct (21) of the safety ventilation system (7).
5. A crankcase ventilation device according to Claim 4, characterized in that the two ducts (20, 21) are arranged eccentrically.
6. A crankcase ventilation device according to Claims 4 and 5, characterized in that the wall portions of the inner duct (21) and of the outer duct (20) partly rest against each other.
7. A crankcase ventilation device according to Claim 1, characterized in that the outlet opening (22) of the main ventilation system (6) is arranged in front of the outlet opening (23) of the safety ventilation system (7), as viewed in the flow direction (B).
8. A crankcase ventilation device according to Claim 1, characterized in that the duct (20) of the main ventilation system (6) and the associated connexion socket (18) are joined at an angle.
9. A crankcase ventilation device according to Claim 1, characterized in that the duct (20) of the main ventilation system (6) is closed at the end (26) opposite its outlet opening (22).
10. A crankcase ventilation device according to Claim 1, characterized in that the connexion member (14) is inserted in a socket (27) in the air-guide casing (15) and is connected thereto by way of a snap connexion (29).
11. A crankcase ventilation device according to Claim 1, characterized in that the duct (21) of the safety ventilation system (7) projects with its free end containing the outlet opening (23) partly into the interior (24) of the air-guide casing (15).
12. A crankcase ventilation device according to Claim 1, characterized in that the end of the duct (20) containing the outlet opening (22) is arranged outside an inner boundary wall (28) in the region of the socket (27).
13. A crankcase ventilation device according to Claim 1, characterized in that the air-guide casing (15) is formed by an air-guide scoop (32) arranged between an air-mass meter and a butterfly-valve socket.
EP87105943A 1986-07-26 1987-04-23 Crankcase ventilation in motor vehicles Expired - Lifetime EP0254816B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3625376A DE3625376C1 (en) 1986-07-26 1986-07-26 Crankcase ventilation for motor vehicles
DE3625376 1986-07-26

Publications (3)

Publication Number Publication Date
EP0254816A2 EP0254816A2 (en) 1988-02-03
EP0254816A3 EP0254816A3 (en) 1989-01-11
EP0254816B1 true EP0254816B1 (en) 1990-10-03

Family

ID=6306074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105943A Expired - Lifetime EP0254816B1 (en) 1986-07-26 1987-04-23 Crankcase ventilation in motor vehicles

Country Status (4)

Country Link
US (1) US4753214A (en)
EP (1) EP0254816B1 (en)
JP (1) JPS6341613A (en)
DE (2) DE3625376C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043545A1 (en) * 2004-09-09 2006-03-30 Audi Ag Method for venting gasses from crankcase especially in IC engine has the venting duct fed into the inlet manifold duct at an acute angle with flow control profiles

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821528C1 (en) * 1988-06-25 1989-09-07 Bayerische Motoren Werke Ag, 8000 Muenchen, De
US5140968A (en) * 1992-02-14 1992-08-25 Navistar International Transportation Corp. Closed loop breather system for engine crankcase
IT232314Y1 (en) * 1994-01-20 1999-12-17 Cornaglia G Off Met Spa VENT DUCT FOR COMBUSTIBLE VAPORS, IN PARTICULAR LUBRICANT OIL, IN AN ENDOTHERMIC ENGINE.
DE19645665A1 (en) * 1996-11-06 1998-05-07 Mann & Hummel Filter Valve unit
DE19717040C1 (en) * 1997-04-23 1998-11-26 Mannesmann Vdo Ag Venting device in a vent line leading to an intake manifold arrangement of an internal combustion engine
DE10136463B4 (en) * 2001-07-26 2010-04-15 Man Nutzfahrzeuge Ag crankcase ventilation
JP4059130B2 (en) * 2003-04-15 2008-03-12 日産自動車株式会社 Blowby gas recirculation device for internal combustion engine
US7431023B2 (en) * 2007-01-23 2008-10-07 Gm Global Technology Operations, Inc. Engine PCV system with venturi nozzle for flow regulation
JP4748152B2 (en) * 2007-12-27 2011-08-17 トヨタ自動車株式会社 Intake pipe structure of internal combustion engine
JP4466754B2 (en) * 2008-03-18 2010-05-26 トヨタ自動車株式会社 Electronically controlled blow-by gas reduction device for internal combustion engines
DE102010013422A1 (en) * 2010-03-30 2011-10-06 Mahle International Gmbh Clutch device, crankcase ventilation device and fresh air system
JP6225885B2 (en) * 2014-11-14 2017-11-08 マツダ株式会社 Blowby gas recirculation system
FR3069277A1 (en) * 2017-07-19 2019-01-25 Psa Automobiles Sa THERMAL MOTOR COMPRISING AN INTERNAL CIRCUIT FOR LIMITING THE PRESSURE OF CARTER GAS

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128154A (en) * 1937-01-11 1938-08-23 Raymond H Masters Internal combustion engine
US2311036A (en) * 1940-05-27 1943-02-16 Dick Wills Engine breather and ventilating system
US3059628A (en) * 1960-12-13 1962-10-23 William J Linn Gas and fume disposal system for internal combustion engines
US3077871A (en) * 1962-03-19 1963-02-19 Richfield Oil Corp Crankcase ventilating system for internal combustion engines
US3362386A (en) * 1965-05-17 1968-01-09 Mcmahon Binder & Huron Internal-combustion engine
US3381673A (en) * 1965-11-22 1968-05-07 Drysdale William Robert Crankcase ventilation system
US3372685A (en) * 1966-12-05 1968-03-12 Ardell T. Bestland Excessive crankcase pressure warning system and relief valve
US4011846A (en) * 1975-03-24 1977-03-15 Did-Mor Engineering And Manufacturing Co. Anti-pollution device
DE3627376C2 (en) * 1986-08-12 1995-09-21 Unilever Nv Containers from several individual packs and process for its manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Service Information Technik, 1985, Porsche 928S USA, WKD 491 710, Seiten 30, 31 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043545A1 (en) * 2004-09-09 2006-03-30 Audi Ag Method for venting gasses from crankcase especially in IC engine has the venting duct fed into the inlet manifold duct at an acute angle with flow control profiles

Also Published As

Publication number Publication date
DE3625376C1 (en) 1987-10-29
EP0254816A3 (en) 1989-01-11
EP0254816A2 (en) 1988-02-03
DE3765340D1 (en) 1990-11-08
JPS6341613A (en) 1988-02-22
US4753214A (en) 1988-06-28

Similar Documents

Publication Publication Date Title
EP0254816B1 (en) Crankcase ventilation in motor vehicles
DE602006000983T2 (en) Inlet manifold made of plastic
DE19614474B4 (en) Air intake duct system for internal combustion engines
DE4403219A1 (en) Intake module for IC engine
DE102018116664B4 (en) Cylinder head cover structure for an engine
DE3841097C2 (en) Intake device for the combustion air of a motor vehicle front engine
EP1284342B1 (en) Oil collecting device for an internal combustion engine, particularly a boxer engine
DE19803230A1 (en) Air inlet system for IC engine
DE19941863A1 (en) Induction system for internal combustion engine has inlet channels in turbulence valve unit main body, turbulence valve in one channel, container chamber in main body, vacuum channel
DE4439792A1 (en) Air inlet system for combustion engines
EP0251159A2 (en) Return line for leak gas from a crank case
EP1520977B1 (en) Intake device for a pre-cleaning device in connection with a fan cover
DE3905254A1 (en) Cooling device for fuel injection valves of an internal combustion engine
DE19509002C2 (en) Thermostat mounting structure
EP0832352B1 (en) Pipe module
DE10105555B4 (en) Ventilation device for oil-laden gases of an internal combustion engine
DE102015222165A1 (en) COMBUSTION ENGINE WITH OIL SEPARATING CHAMBER
EP0348743B1 (en) Crank case air extractor for an internal-combustion engine
DE3152702C2 (en) Distribution line for the fuel supply to several injection valves
DE2740465A1 (en) IC engine with recirculated exhaust - has duct extending between inlet and exhaust passages of cylinder head consisting of drilling or inserted pipe
DE102015113000A1 (en) Oil pan of an internal combustion engine
DE60020320T2 (en) Inlet manifold with bleed valve attached
DE4302659C1 (en) Induction air guide for vehicle combustion engine - has exchangeable, insertable throttle as diffusor forming annular space with guidance channel and held in place by burls
DE10346005B4 (en) Air intake module for an internal combustion engine with impulse charging
DE102006019880A1 (en) 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

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19890516

17Q First examination report despatched

Effective date: 19891219

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3765340

Country of ref document: DE

Date of ref document: 19901108

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITTA It: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920331

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920410

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920430

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930423

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930423

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19931229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050423