EP0874141A1 - Venting device for the pipe connected to the intake manifold of a combustion engine - Google Patents

Venting device for the pipe connected to the intake manifold of a combustion engine Download PDF

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Publication number
EP0874141A1
EP0874141A1 EP98106568A EP98106568A EP0874141A1 EP 0874141 A1 EP0874141 A1 EP 0874141A1 EP 98106568 A EP98106568 A EP 98106568A EP 98106568 A EP98106568 A EP 98106568A EP 0874141 A1 EP0874141 A1 EP 0874141A1
Authority
EP
European Patent Office
Prior art keywords
throttle
metal sleeve
combustion engine
intake manifold
venting device
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
EP98106568A
Other languages
German (de)
French (fr)
Other versions
EP0874141B1 (en
Inventor
Jens Bieler
Peter Werner
Matthias Zentgraf
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.)
Daimler AG
Mannesmann VDO AG
Original Assignee
DaimlerChrysler AG
Daimler Benz AG
Mannesmann VDO 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 DaimlerChrysler AG, Daimler Benz AG, Mannesmann VDO AG filed Critical DaimlerChrysler AG
Publication of EP0874141A1 publication Critical patent/EP0874141A1/en
Application granted granted Critical
Publication of EP0874141B1 publication Critical patent/EP0874141B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—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
    • F01M13/023—Control valves in suction conduit
    • 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
    • F01M13/0011—Breather valves
    • F01M2013/0027—Breather valves with a de-icing or defrosting system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0455—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a de-icing or defrosting system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0472—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil using heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to a ventilation device in a leading an intake manifold arrangement of an internal combustion engine Vent line with a flow limiter Throttle, the intake manifold assembly made of a plastic component with an inlet connection for the ventilation line and there is an exit, further with an in a through hole of the plastic component firmly inserted Metal sleeve with a fastening screw that holds the plastic part over the metal sleeve with the cylinder head of the internal combustion engine tight.
  • the invention is therefore based on the object of a ventilation device the generic type simple measures to be provided by the even at extremely low outside temperatures Functional impairments or even failures of the crankcase ventilation be avoided.
  • a four-cylinder internal combustion engine 1 with four arranged in series Intake pipes 2, 3, 4, 5 have one to the intake pipe arrangement 6 leading and serving for crankcase ventilation Vent line 7, which is between the adjacent and inner Intake pipes 3,4 on the plastic component Intake manifold assembly 6 is attached to a formed on the plastic component inlet connection piece 8th.
  • the plastic component contains a step-shaped elongated Through hole 9, the lower half of the ventilation line 7 is crossed.
  • the entry side Connector 8 of the vent line 7, the radial in the Through hole 9 opens out, and one through a radial bore 10 formed outlet are offset in height from each other, whereby the connector 8 opposite the outlet-side radial bore 10 is arranged higher.
  • the through hole 9 there is a one acting as a spacer Metal sleeve 11, which extends over the entire length of the Through hole 9 extends.
  • This metal sleeve 11 has in Height of the connecting piece 8 to a throttle 12, the geodetically highest point of the crankcase ventilation and is Radial bore extends to the connecting piece 8 and a connection from the connecting piece 8 to an annular space 13 produces that of the inner wall 14 of the metal sleeve 11 and a fastening screw inserted in the metal sleeve 11 15 is formed.
  • the ring gap 13 begins just above the throttle 12 at a point 13a and ends on lower end of the metal sleeve 11.
  • the plastic intake manifold assembly 6 is through the Fastening screw 15 with the cylinder head 18 of the internal combustion engine tight.

Landscapes

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

Abstract

A throttle limits flow through the pipe, and is formed by a plastic component with inlet union for the pipe and an outlet. A metal bush fixed in a drilling through the component has a screw by which the component is secured to the cylinder-head. This throttle (12) forms part of the pipe (7), and is situated at the heat-conductive bush (11). The pipe can intersect the drilling (9) and bush, the throttle being incorporated in the latter. It can form an extension of the inlet union, leading into an annular chamber (13) between bush and screw (15). The radial outlet drilling (16) to the engine intake (6) and which passes through the bush is of larger diameter (16). Where the engine has four or more cylinders, the inlet union and throttle can be situated between the intake pipes to two adjacent central cylinders, while the throttle is at the highest geodetic point of the crankcase vent system.

Description

Die Erfindung betrifft eine Entlüftungsvorrichtung in einer zu einer Saugrohranordnung einer Brennkraftmaschine hinführenden Entlüftungsleitung mit einer als Durchflußbegrenzer wirkenden Drossel, wobei die Saugrohranordnung aus einem Kunststoffbauteil mit einem eintrittsseitigen Anschlußstutzen für die Entlüftungsleitung und einem Austritt besteht, ferner mit einer in einer Durchgangsbohrung des Kunststoffbauteiles fest eingesetzten Metallhülse mit einer Befestigungsschraube, die das Kunststoffteil über die Metallhülse mit dem Zylinderkopf der Brennkraftmaschine fest verspannt.The invention relates to a ventilation device in a leading an intake manifold arrangement of an internal combustion engine Vent line with a flow limiter Throttle, the intake manifold assembly made of a plastic component with an inlet connection for the ventilation line and there is an exit, further with an in a through hole of the plastic component firmly inserted Metal sleeve with a fastening screw that holds the plastic part over the metal sleeve with the cylinder head of the internal combustion engine tight.

Derartige Entlüftungsvorrichtungen mit einer als Durchflußbegrenzer wirkenden Drossel sind bereits in Serienfahrzeugen der C- und E-Klasse der Anmelderin bekannt.
In diesen Fahrzeugen ist die vom Kurbelgehäuse der mehrzylindrigen Brennkraftmaschine ausgehende Entlüftungsleitung an einer als Kunststoffbauteil ausgebildeten Saugrohranordnung angeflanscht. In dem außenliegenden bzw. freiliegenden Teil der Entlüftungsleitung befindet sich zwischen Kurbelgehäuse und Saugrohranordnung die Drossel als durchflußbestimmendes Zwischenstück. Such ventilation devices with a throttle acting as a flow restrictor are already known in series vehicles of the applicant's C and E class.
In these vehicles, the ventilation line extending from the crankcase of the multi-cylinder internal combustion engine is flanged to an intake manifold arrangement designed as a plastic component. In the outer or exposed part of the vent line, the throttle is located between the crankcase and the intake manifold arrangement as a flow-determining intermediate piece.

Bei Ausführungen dieser Art traten bei niedrigen Außentemperaturen Funktionsstörungen auf, die eine einwandfreie Kurbelgehäuseentlüftung nicht mehr sicherstellten.In versions of this type occurred at low outside temperatures Malfunctions on the proper crankcase ventilation no longer ensured.

Der Erfindung liegt daher die Aufgabe zugrunde, an einer Entlüftungsvorrichtung der gattungsgemäßen Art einfache Maßnahmen vorzusehen, durch die auch bei extrem niedrigen Außentemperaturen Funktionsbeeinträchtigungen oder gar Ausfälle der Kurbelgehäuseentlüftung vermieden werden.The invention is therefore based on the object of a ventilation device the generic type simple measures to be provided by the even at extremely low outside temperatures Functional impairments or even failures of the crankcase ventilation be avoided.

Zur Lösung der Aufgabe dienen die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale.To solve the problem serve in the characterizing part of the Claim 1 specified features.

In den Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben.In the subclaims there are still further training opportunities specified the invention.

Durch die Schaffung einer thermisch leitenden Verbindung mit motorbetriebswarmen Bauteilen, nämlich über eine mit dem Zylinderkopf in Kontakt stehende Metallhülse zur Wärmeeinleitung in die Drossel, wird auf einfachste Weise ein Einfrieren der als Durchflußbegrenzer wirkenden Drossel verhindert. Zusätzliche Bauteile sind somit nicht erforderlich, vielmehr wird eine an sich bekannte und seither lediglich als Abstandshalter wirkende Metallhülse als Wärmeleiter genutzt, um den drosselnden Abschnitt der Entlüftungsleitung gegen tiefe Außentemperaturen unempfindlich zu machen.By creating a thermally conductive connection with engine-warm components, namely one with the cylinder head in contact metal sleeve for heat introduction in the throttle, is considered to be the easiest way to freeze the Flow restrictor acting throttle prevented. Additional Components are therefore not necessary, rather one is on known and since then acting only as a spacer Metal sleeve used as a heat conductor to the throttling section the vent line against low outside temperatures make insensitive.

Eine vorteilhafte Ausgestaltung der Erfindung ergibt sich dadurch, daß die Drossel als Leitungszwischenstück in die Metallhülse integriert ist. Somit wird bei tiefen Außentemperaturen und kaltem Motor ein schneller Temperaturanstieg bzw. eine rasche Aufheizung im Motorbetrieb ermöglicht. An advantageous embodiment of the invention results from that the throttle as a line adapter in the metal sleeve is integrated. Thus, at low outside temperatures and cold engine a rapid rise in temperature or a rapid Heating in engine operation enabled.

Der Gegenstand der Erfindung ist in der Zeichnung dargestellt und wird anhand eines Ausführungsbeispieles im folgenden näher erläutert. Es zeigen

Fig. 1
eine in einer Saugrohranordnung untergebrachte Entlüftungsvorrichtung einer mit freiliegenden Entlüftungsleitungen versehenen vierzylindrigen Brennkraftmaschine und
Fig. 2
die Anordnung einer Drossel in einer mit dem Zylinderkopf in Kontakt stehenden Metallhülse in vergrößerter Darstellung.
The object of the invention is illustrated in the drawing and is explained in more detail below using an exemplary embodiment. Show it
Fig. 1
a ventilation device accommodated in an intake manifold arrangement of a four-cylinder internal combustion engine provided with exposed ventilation lines and
Fig. 2
the arrangement of a throttle in a metal sleeve in contact with the cylinder head in an enlarged view.

Eine vierzylindrige Brennkraftmaschine 1 mit vier in Reihe angeordneten Saugrohren 2,3,4,5 weist eine zu der Saugrohranordnung 6 hinführende und zur Kurbelgehäuseentlüftung dienende Entlüftungsleitung 7 auf, die zwischen den benachbarten und innenliegenden Saugrohren 3,4 an der als Kunststoffbauteil ausgebildeten Saugrohranordnung 6 befestigt ist, und zwar an einem an dem Kunststoffbauteil angeformten eintrittsseitigen Anschlußstutzen 8.A four-cylinder internal combustion engine 1 with four arranged in series Intake pipes 2, 3, 4, 5 have one to the intake pipe arrangement 6 leading and serving for crankcase ventilation Vent line 7, which is between the adjacent and inner Intake pipes 3,4 on the plastic component Intake manifold assembly 6 is attached to a formed on the plastic component inlet connection piece 8th.

Das Kunststoffbauteil enthält eine stufig ausgebildete langgestreckte Durchgangsbohrung 9, die in ihrer unteren Hälfte von der Entlüftungsleitung 7 durchkreuzt wird. Der eintrittsseitige Anschlußstutzen 8 der Entlüftungsleitung 7, der radial in die Durchgangsbohrung 9 einmündet, und ein durch eine Radialbohrung 10 gebildeter Austritt liegen höhenversetzt zueinander, wobei der Anschlußstutzen 8 gegenüber der austrittsseitigen Radialbohrung 10 höher angeordnet ist.The plastic component contains a step-shaped elongated Through hole 9, the lower half of the ventilation line 7 is crossed. The entry side Connector 8 of the vent line 7, the radial in the Through hole 9 opens out, and one through a radial bore 10 formed outlet are offset in height from each other, whereby the connector 8 opposite the outlet-side radial bore 10 is arranged higher.

In der Durchgangsbohrung 9 steckt eine als Abstandshalter wirkende Metallhülse 11, die sich über die gesamte Länge der Durchgangsbohrung 9 erstreckt. Diese Metallhülse 11 weist in Höhe des Anschlußstutzens 8 eine Drossel 12 auf, die am geodätisch höchsten Punkt der Kurbelgehäuseentlüftung liegt und als Radialbohrung in Verlängerung zum Anschlußstutzen 8 verläuft und eine Verbindung von dem Anschlußstutzen 8 zu einem Ringzwischenraum 13 herstellt, der von der Innenwandung 14 der Metallhülse 11 und einer in der Metallhülse 11 steckenden Befestigungsschraube 15 gebildet ist. Der Ringzwischenraum 13 beginnt kurz oberhalb der Drossel 12 an einer Stelle 13a und endet am unteren Ende der Metallhülse 11.In the through hole 9 there is a one acting as a spacer Metal sleeve 11, which extends over the entire length of the Through hole 9 extends. This metal sleeve 11 has in Height of the connecting piece 8 to a throttle 12, the geodetically highest point of the crankcase ventilation and is Radial bore extends to the connecting piece 8 and a connection from the connecting piece 8 to an annular space 13 produces that of the inner wall 14 of the metal sleeve 11 and a fastening screw inserted in the metal sleeve 11 15 is formed. The ring gap 13 begins just above the throttle 12 at a point 13a and ends on lower end of the metal sleeve 11.

Zwischen dem Ringzwischenraum 13 und der austrittsseitigen Radialbohrung 10 verläuft eine durchmessermäßig große Radialbohrung 16 in der Metallhülse 11, die in ein Sammelrohr 17 mündet, welches sich über sämtliche Saugrohre 2 bis 5 erstreckt (nicht dargestellt).Between the annular space 13 and the radial bore on the outlet side 10 runs a large radial bore 16 in the metal sleeve 11, which opens into a collecting tube 17, which extends over all suction pipes 2 to 5 (not shown).

Die aus Kunststoff bestehende Saugrohranordnung 6 ist durch die Befestigungsschraube 15 mit dem Zylinderkopf 18 der Brennkraftmaschine fest verspannt.The plastic intake manifold assembly 6 is through the Fastening screw 15 with the cylinder head 18 of the internal combustion engine tight.

Claims (4)

Entlüftungsvorrichtung in einer zu einer Saugrohranordnung einer Brennkraftmaschine hinführenden Entlüftungsleitung mit einer als Durchflußbegrenzer wirkenden Drossel, wobei die Saugrohranordnung aus einem Kunststoffbauteil mit einem eintrittsseitigen Anschlußstutzen für die Entlüftungsleitung und einem Austritt besteht, ferner mit einer in einer Durchgangsbohrung des Kunststoffbauteiles fest eingesetzten Metallhülse mit einer Befestigungsschraube, die das Kunststoffteil über die Metallhülse mit dem Zylinderkopf der Brennkraftmaschine fest verspannt,
dadurch gekennzeichnet,
daß die Drossel (12) als Teil der Entlüftungsleitung (7) im Bereich der wärmeleitenden Metallhülse (11) angeordnet ist.Venting device in a vent line leading to an intake manifold arrangement of an internal combustion engine with a throttle acting as a flow limiter, the intake manifold arrangement consisting of a plastic component with an inlet-side connecting piece for the vent line and an outlet, furthermore with a metal sleeve with a fastening screw fixedly inserted in a through hole of the plastic component. which firmly clamps the plastic part to the cylinder head of the internal combustion engine via the metal sleeve,
characterized,
that the throttle (12) is arranged as part of the vent line (7) in the region of the heat-conducting metal sleeve (11). Entlüftungsvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Entlüftungsleitung (7) die Durchgangsbohrung (9) und die Metallhülse (11) durchkreuzt, wobei die Drossel (12) in die Metallhülse (11) integiert ist. Venting device according to claim 1,
characterized,
that the ventilation line (7) crosses the through hole (9) and the metal sleeve (11), the throttle (12) being integrated in the metal sleeve (11). Entlüftungsvorrichtung nach den Ansprüchen 1 oder 2,
dadurch gekennzeichnet,
daß die in der Metallhülse (11) in Verlängerung zum eintrittsseitigen Anschlußstutzen (8) verlaufende Drossel (12) in einen aus der Metallhülse (11) und der Befestigungsschraube (15) gebildeten Ringzwischenraum (13) mündet, und daß eine austrittsseitige Radialbohrung (10) in der Saugrohranordnung (6) über eine durchmessermäßig größere Radialbohrung (16) in der Metallhülse (11) mit dem Ringzwischenraum (13) verbunden ist.Venting device according to claims 1 or 2,
characterized,
that the throttle (12) extending in the metal sleeve (11) in extension to the inlet-side connecting piece (8) opens into an annular space (13) formed from the metal sleeve (11) and the fastening screw (15), and that an outlet-side radial bore (10) in the intake manifold arrangement (6) is connected to the annular space (13) via a larger diameter radial bore (16) in the metal sleeve (11). Entlüftungsvorrichtung nach Anspruch 1, für eine vier- oder mehrzylindrige Brennkraftmaschine mit einer der Zylinderzahl entsprechenden Anzahl von Saugrohren,
dadurch gekennzeichnet,
daß der eintrittsseitige Anschlußstutzen (8) sowie die Drossel (12) zwischen zwei benachbart und mittig liegenden Saugrohren (3,4) angeordnet ist, wobei die Drossel (12) am geodätisch höchsten Punkt der Kurbelgehäuseentlüftung liegt.Venting device according to claim 1, for a four- or multi-cylinder internal combustion engine with a number of intake pipes corresponding to the number of cylinders,
characterized,
that the inlet-side connecting piece (8) and the throttle (12) is arranged between two adjacent and central suction pipes (3, 4), the throttle (12) being at the geodetically highest point of the crankcase ventilation.
EP98106568A 1997-04-23 1998-04-09 Venting device for the pipe connected to the intake manifold of a combustion engine Expired - Lifetime EP0874141B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717040 1997-04-23
DE19717040A DE19717040C1 (en) 1997-04-23 1997-04-23 Venting device in a vent line leading to an intake manifold arrangement of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0874141A1 true EP0874141A1 (en) 1998-10-28
EP0874141B1 EP0874141B1 (en) 2002-02-27

Family

ID=7827436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106568A Expired - Lifetime EP0874141B1 (en) 1997-04-23 1998-04-09 Venting device for the pipe connected to the intake manifold of a combustion engine

Country Status (3)

Country Link
US (1) US5944000A (en)
EP (1) EP0874141B1 (en)
DE (2) DE19717040C1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014711U1 (en) 2000-08-25 2000-11-23 Mann & Hummel Filter Device for recirculating gas on an internal combustion engine
DE10136463B4 (en) * 2001-07-26 2010-04-15 Man Nutzfahrzeuge Ag crankcase ventilation
DE102004020102A1 (en) * 2004-04-24 2005-11-24 Mann + Hummel Gmbh Suction tube arrangement for an internal combustion engine
DE102004031499B4 (en) * 2004-06-30 2009-08-13 Daimler Ag Crankcase vent line
DE102010005828A1 (en) * 2010-01-27 2011-07-28 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Mich. Air intake device for sucking in ambient air for internal combustion engine of motor vehicle, is provided with turbocharger, where turbocharger is connected to air inlet pipe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4753214A (en) * 1986-07-26 1988-06-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Crankcase ventilation system for motor vehicles
US4920930A (en) * 1983-06-30 1990-05-01 Kubota Limited System for blow-by gas return to the combustion chamber of an engine
US4922882A (en) * 1988-07-21 1990-05-08 Dr. Ing. H.C.F. Porsche Ag Crankcase ventilation system
DE19525542A1 (en) * 1995-07-13 1997-01-16 Mann & Hummel Filter Heating device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1525882A (en) * 1924-07-14 1925-02-10 Joseph I Padgett Engine attachment
GB1258511A (en) * 1968-07-17 1971-12-30
US4024846A (en) * 1974-11-01 1977-05-24 The Ferry Cap & Set Screw Company Valve device and system employing the same
US4768493A (en) * 1984-04-27 1988-09-06 Honda Giken Kogyo Kabushiki Kaisha Blow-by gas heating system for internal combustion engines
JP3537554B2 (en) * 1995-08-30 2004-06-14 ヤマハマリン株式会社 Outboard motor blow-by gas reduction system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4920930A (en) * 1983-06-30 1990-05-01 Kubota Limited System for blow-by gas return to the combustion chamber of an engine
US4753214A (en) * 1986-07-26 1988-06-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Crankcase ventilation system for motor vehicles
US4922882A (en) * 1988-07-21 1990-05-08 Dr. Ing. H.C.F. Porsche Ag Crankcase ventilation system
DE19525542A1 (en) * 1995-07-13 1997-01-16 Mann & Hummel Filter Heating device

Also Published As

Publication number Publication date
US5944000A (en) 1999-08-31
DE19717040C1 (en) 1998-11-26
DE59803163D1 (en) 2002-04-04
EP0874141B1 (en) 2002-02-27

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