EP1447531B1 - Blowby gas valve with integrated cyclone separator - Google Patents

Blowby gas valve with integrated cyclone separator Download PDF

Info

Publication number
EP1447531B1
EP1447531B1 EP04000598A EP04000598A EP1447531B1 EP 1447531 B1 EP1447531 B1 EP 1447531B1 EP 04000598 A EP04000598 A EP 04000598A EP 04000598 A EP04000598 A EP 04000598A EP 1447531 B1 EP1447531 B1 EP 1447531B1
Authority
EP
European Patent Office
Prior art keywords
valve
cyclone separator
valve chamber
separating wall
oil
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
EP04000598A
Other languages
German (de)
French (fr)
Other versions
EP1447531A1 (en
Inventor
Armin Zapf
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.)
Alfmeier Praezision SE
Original Assignee
Alfmeier Praezision AG Baugruppen und Systemlosungen
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 Alfmeier Praezision AG Baugruppen und Systemlosungen filed Critical Alfmeier Praezision AG Baugruppen und Systemlosungen
Publication of EP1447531A1 publication Critical patent/EP1447531A1/en
Application granted granted Critical
Publication of EP1447531B1 publication Critical patent/EP1447531B1/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
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the invention relates to a crankcase ventilation valve with integrated cyclone separator.
  • a crankcase ventilation valve with integrated cyclone separator.
  • Such a valve is known for example from DE 196 04 708 A1.
  • Into the crankcase of an internal combustion engine e.g. due to leaks in the piston rings, exhaust gases, partially or unburned fuel, etc. So that these partially environmentally harmful substances are not e.
  • a negative pressure is maintained in the crankcase with respect to the engine environment and the crankcase is ventilated.
  • the discharged crankcase gas is added to the intake air and thus supplied to the engine combustion.
  • crankcase gas contains engine lubricating oil.
  • the crankcase gas therefore first passes through an oil separator, which provides almost oil-free gas at its exit and feeds the separated oil back to the oil sump of the engine.
  • a pressure regulator Downstream of the oil separator is a pressure regulator which limits the pressure in the crankcase to a minimum value. This avoids, for example, that too strong negative pressure in the crankcase via shaft seals or Piston rings additional substances are sucked into the crankcase.
  • a corresponding combined unit is e.g. known from DE 197 07 597 A1.
  • Both items, so both the cyclone and the vent valve are constructed functionally separated from each other in a conventional manner, and placed on the interposition of a partition or an intermediate ring surface to each other to form a single overall component.
  • the purified air from the cyclone separator passes through an opening in the partition in the valve chamber of the vent valve over.
  • a crankcase ventilation valve with integrated pressure control and oil separation unit, the few sealed joints and a compact design.
  • the object is achieved by a crankcase ventilation valve with the features of claim 1.
  • a crankcase ventilation valve includes a valve chamber which is bounded on one side by a membrane and on the opposite side by a partition wall.
  • the partition wall separates the valve chamber from a cyclone separator.
  • the cyclone separator has a gas inlet which can be connected to a crankcase.
  • the cyclone separator has a gas outlet, which is connected via a guide channel with the valve chamber. Near the gas outlet points the cyclone separator an oil outlet, which is connectable to an oil return.
  • a suction channel penetrates the cyclone and can be connected at its one end to a vacuum source. With its formed to a valve seat other end of the suction port protrudes into the valve chamber. The valve seat cooperates with the membrane, wherein the membrane is spring-loaded in the opening direction.
  • the entire valve can lie in a housing which can be produced, for example, as a one-piece injection-molded part.
  • the partition is subsequently used in the injection molded part. This results in the valve outer wall no further sealed joint with contact to the environment of the valve.
  • the tightness requirement for the partition used is low, since there is hardly any pressure difference between the cyclone separator and the valve chamber.
  • the only joint with environmental sealing requirements is created by attaching the membrane to one side of the valve chamber. Since essential parts of the valve can be integrated in a single component, the total number of individual parts of the valve is reduced.
  • the arrangement of cyclone separator, valve chamber and suction channel leads to geometrically simple components and to small overall volume of the entire valve.
  • the valve has a substantially hollow cone-shaped cyclone separator.
  • the cyclone separator is arranged on the valve chamber, that the cone base faces the valve chamber and the central longitudinal axis of the cone is substantially perpendicular to the membrane. This results in a geometrically simplified Shape of the valve.
  • the cyclone separator with molded valve chamber and molded suction channel can be produced inexpensively injection molding technology.
  • the suction channel is arranged substantially coaxially to the central longitudinal axis of the cone.
  • the gas stream entering the cyclone separator can freely circulate the suction channel, which leads to an effective oil separation in the cyclone.
  • the suction channel is arranged coaxially within the guide channel, wherein the partition wall has openings which are fluidically connected to the guide channel.
  • the coaxial arrangement of the guide and suction channel saves space and further simplifies the production of the valve.
  • the openings in the partition wall for the guide channel are easy to implement in terms of manufacturing technology.
  • a further embodiment of the invention provides that the guide channel is bounded by a tube which is connected at its end facing the valve chamber with the partition wall.
  • the partition wall and the tube thus form a single component which is easy to manufacture and handle and can be easily inserted into the housing during assembly of the valve. The number of individual parts of the valve is thereby further reduced.
  • a further embodiment of the invention provides a helical spring which encompasses the valve seat and, on the one hand, accomplishes the spring loading of the membrane and, on the other hand, is supported on the dividing wall. After assembly of the valve, the partition is held by the spring in its installed position, why no additional measures for fixing the partition in the valve are necessary.
  • a further embodiment of the invention provides a labyrinth seal between the outer edge of the partition wall and the valve housing.
  • the labyrinth seal can be carried out by easily realized in the manufacture of the components grooves and springs, which engage in the assembly of the valve.
  • the sealing effect of the labyrinth seal is created automatically during the first phase of operation of the crankcase ventilation valve when oily gases penetrate from the cyclone separator into the labyrinth seal and the introduced oil particles permanently clog the labyrinth-shaped gap of the seal. By this measure additional sealing rings or sealant are avoided.
  • the crankcase ventilation valve shown in FIG. 1 has as main components a conical or funnel-shaped cyclone separator 2 and a pressure regulator 4.
  • the wall or the housing 28 of the cyclone separator is interrupted in the region of its end by a gas inlet 6 and in the region of its narrowed end by an oil outlet 8.
  • the gas inlet 6 opens into a molded neck 10, on which a connecting line 12 is pushed, which leads to the crankcase of a motor (not shown).
  • the oil outlet 8 opens into a nozzle 14, on which a connecting line 16 is attached, which leads to the oil sump of the engine.
  • the cyclone separator 2 is penetrated coaxially with its central longitudinal axis 5 by a tubular suction channel 14, whose one end 19 extends out of the housing 28 and opens into a connecting piece 17. On these a connecting line 18 is attached, which leads to the intake manifold (not shown) of the engine.
  • the suction channel 14 tapers conically to a valve seat 24.
  • the tapered channel section merges with a radially extending stop shoulder 22 in the non-tapered channel section.
  • the stop shoulder 22 is arranged coaxially to the central longitudinal axis 5 and in a direction perpendicular to this plane.
  • At the constricted end of the housing 28 is penetrated by a suction channel 14 and with its edge on the outer peripheral surface fitting opening 29 is present.
  • the wide end of the cyclone separator 2 is formed by a cylindrical longitudinal section 31, which is closed at the end by a housing cover.
  • a partition wall 32 which extends transversely to the central longitudinal axis 5 and over the entire inner cross section of the longitudinal section.
  • the partition wall 32 is arranged at axial distance from the housing cover 56.
  • the bounded by the housing 28, the partition wall 32 and the housing cover space forms a valve chamber 30.
  • a central opening 33 is present, which is penetrated by the end 20 of the suction channel 14.
  • the edge of the opening 33 is supported on the stop shoulder 22, the edge of the circular partition 32 on an annular flange 37, which extends from the inner wall of the longitudinal portion 31 radially inwardly.
  • a pipe 34 is integrally formed with its one end face 36.
  • the tube 34 comprises the suction channel 14 coaxially and at radial distance, wherein the annular space present between the suction channel 14 and the tube forms a further channel designated below as a guide channel 40.
  • the guide channel 40 is fluidly connected at its end facing the partition via openings 44 in the partition wall 32 with the valve chamber 30.
  • the tube 34 terminates at an axial distance in front of the opening 29 of the housing 20.
  • the end face of the tube 34 facing away from the dividing wall 32 and the wall 38 of the suction channel 14 form a gas outlet 42.
  • an elastic circular membrane 54 On the front side of the longitudinal section 52 is an elastic circular membrane 54 with its edge region.
  • the membrane 54 Through the housing cover 56, which engages with recesses 58 on the housing 28 mounted latching lugs 60, the membrane 54 is mechanically fixed and sealingly pressed on the end face 52.
  • the housing cover 56 has an opening 62 which connects the existing between the diaphragm 54 and the housing cover 56 gap with the atmosphere.
  • a helical spring 64 acts on the diaphragm 54 resiliently in the direction away from the valve seat 24, ie in the opening direction of the valve.
  • the coil spring 64 is supported for this purpose on the partition wall 32 and pushes it against the stop shoulder 22. At the same time, the springs 48 are pressed into the grooves 50 by the coil spring 64.
  • crankcase ventilation valve In direction 100, the flow of crankcase gas coming from the crankcase and penetrated by oil particles flows into the cyclone separator 2. In a helical path, the oil-gas mixture flows on the inner wall 102 of the cyclone separator in the direction of the gas outlet 42 and circles the tube 34. In this case, the centrifugal forces on the inner wall 102 of the cyclone separator 2 precipitate oil droplets which travel along the inner wall 102 to the oil outlet 8 stream.
  • crankcase ventilation valve oil-particle-carrying crankcase gas flows a little way into the labyrinth seal, that is, the gaps between the springs 48 and the grooves 50.
  • the gaps are thereby permanently added by oil, so that henceforth no oil-carrying gas from the cyclone separator 2 through the Labyrinth seal can penetrate into the valve chamber 30.
  • the deposited on the inner wall 102 oil flows in the direction 103 back to the oil sump of the engine. Since there is a slightly lower pressure in the valve chamber 30 than in the oil sump, the largely oil-free gas takes the path along the direction 104. It flows through the guide channel 40 in From the intake manifold of the engine, not shown, the suction channel 14 is subjected to negative pressure, so that the gas flows from the valve chamber 30 in the direction 106 through the valve seat 24 from the valve chamber 30 and the intake air of the unillustrated motor is supplied again.
  • the helical spring 64 is dimensioned such that when a certain pressure difference between the valve chamber 30 and the suction channel 14 is exceeded, the membrane 54 seals in the direction 108 against the valve seat 24 and closes the opening 110 of the suction channel 14.
  • the damping of the diaphragm 54 when closing or releasing the suction channel 14 can be predetermined by the cross section of the opening 62. As a result, the amount of air is determined, the maximum per unit time through the opening 62 in the space between the diaphragm 54 and the housing cover 56 on or can flow out of this.
  • Fig. 2 shows a perspective view of a composite of the partition wall 32 and the pipe 34 component with the openings 44, through the opening 33 in the assembled state, the tapered end protrudes with the valve seat 24 of the suction channel 14.
  • the circular peripheral springs 48 are formed in the region of their edge 46.

Landscapes

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

Abstract

Crank housing ventilation valve with an integrated cyclone separator (2) comprises a valve chamber (30) defined on one side by a membrane (54) and on the opposite-lying side by a separating wall (32) separating the valve chamber from the cyclone separator. The cyclone separator has a gas inlet (6) connected to the crank housing, a gas outlet (42) connected via a guide channel (40) to the valve chamber and near the gas outlet an oil outlet (8) connected to an oil return. An intake channel connected at one end to a vacuum source passes through the cyclone separator and protrudes with its other end forming a valve seat (24) into the valve chamber. The valve seat interacts with the membrane, which is spring-loaded in the opening direction.

Description

Die Erfindung betrifft ein Kurbelgehäuseentlüftungsventil mit integriertem Zyklonabscheider. Ein solches Ventil ist beispielsweise aus der DE 196 04 708 A1 bekannt. In das Kurbelgehäuse eines Verbrennungsmotors dringen z.B. aufgrund von Undichtigkeiten der Kolbenringe Abgase, teil- oder unverbrannter Kraftstoff usw. ein. Damit diese teils umweltschädlichen Stoffe nicht z.B. über Wellendichtungen in die Umwelt gelangen, wird im Kurbelgehäuse ein Unterdruck gegenüber der Motorumgebung aufrechterhalten und das Kurbelgehäuse durchlüftet. Das abgeführte Kurbelgehäusegas wird der Ansaugluft beigemischt und so der Motorverbrennung zugeführt.The invention relates to a crankcase ventilation valve with integrated cyclone separator. Such a valve is known for example from DE 196 04 708 A1. Into the crankcase of an internal combustion engine, e.g. due to leaks in the piston rings, exhaust gases, partially or unburned fuel, etc. So that these partially environmentally harmful substances are not e. To get into the environment through shaft seals, a negative pressure is maintained in the crankcase with respect to the engine environment and the crankcase is ventilated. The discharged crankcase gas is added to the intake air and thus supplied to the engine combustion.

Im Kurbelgehäusegas ist Motorschmieröl enthalten. Um den Ölverbrauch des Motors niedrig zu halten und Probleme bei der Abgasreinigung, insbesondere in einem nachgeschalteten Abgaskatalysator zu vermeiden, darf möglichst kein Öl der Verbrennung zugeführt werden. Das Kurbelgehäusegas durchläuft deshalb zunächst einen Ölabscheider, der an seinem Ausgang nahezu ölfreies Gas bereitstellt und das abgeschiedene Ö1 wieder dem Ölsumpf des Motors zuführt.The crankcase gas contains engine lubricating oil. In order to keep the oil consumption of the engine low and to avoid problems in the exhaust gas purification, in particular in a downstream catalytic converter, as far as possible no oil should be supplied to the combustion. The crankcase gas therefore first passes through an oil separator, which provides almost oil-free gas at its exit and feeds the separated oil back to the oil sump of the engine.

Dem Ölabscheider ist stromabwärts ein Druckregler nachgeschaltet, der den Druck im Kurbelgehäuse auf einen Minimalwert begrenzt. Hierdurch wird zum Beispiel vermieden, dass bei zu starkem Unterdruck im Kurbelgehäuse über Wellendichtungen oder Kolbenringe zusätzliche Stoffe ins Kurbelgehäuse eingesaugt werden.Downstream of the oil separator is a pressure regulator which limits the pressure in the crankcase to a minimum value. This avoids, for example, that too strong negative pressure in the crankcase via shaft seals or Piston rings additional substances are sucked into the crankcase.

Bisher werden zur Druckregelüng und Ölabscheidung zwei getrennte Bauteile oder kombinierte Einheiten verwendet.So far, two separate components or combined units are used for Druckregelüng and oil separation.

Eine entsprechend kombinierte Einheit ist z.B. aus der DE 197 07 597 A1 bekannt. Beide Einzelteile, also sowohl das Zyklon sowie das Entlüftungsventil sind in herkömmlicher Weise funktional getrennt voneinander aufgebaut, und über Zwischenschaltung einer Trennwand bzw. eines Zwischenrings flächig aneinander gesetzt, um ein einziges Gesamtbauteil zu bilden. Am , Zwischenring, also der Trennstelle beider Bauteile, tritt die vom Zyklonabscheider gereinigte Luft durch eine Durchbrechung in der Trennwand in die Ventilkammer des Entlüftungsventils über.A corresponding combined unit is e.g. known from DE 197 07 597 A1. Both items, so both the cyclone and the vent valve are constructed functionally separated from each other in a conventional manner, and placed on the interposition of a partition or an intermediate ring surface to each other to form a single overall component. On, intermediate ring, so the separation point of both components, the purified air from the cyclone separator passes through an opening in the partition in the valve chamber of the vent valve over.

Die Nachteile dieser und anderer bisheriger Lösungen sind unter anderem das große Bauvolumen, das im allgemeinen zu einer großen Bauteiloberfläche führt. Hierdurch ist schwer eine thermische Isolierung des Bauteils möglich, was zum Beispiel im Winter zum Einfrieren der Kondensate im Ölabscheider und Versagen der gesamten Einheit führen kann. Außerdem sind die Bauteile aufgrund ihrer komplizierten Formgebung oft aus mehreren Einzelteilen gefertigt, was viele abzudichtende Fügestellen zur Folge hat. Hierdurch ist schwer zu gewährleisten, dass keine Schadstoffe aus den Bauteilen in die Umwelt austreten.The disadvantages of these and other previous solutions include the large volume of construction, which generally leads to a large component surface. As a result, a thermal insulation of the component is difficult, which can lead, for example, in winter to freeze the condensates in the oil separator and failure of the entire unit. In addition, the components are often made of several parts due to their complicated shape, which has many joints to be sealed result. This makes it difficult to ensure that no pollutants escape from the components in the environment.

Aufgabe der Erfindung ist es, ein Kurbelgehäuse-Entlüftungsventil mit integrierter Druckregel- und Ölabscheideeinheit anzugeben, die wenige abzudichtende Fügestellen und eine kompakte Bauweise aufweist. Die Aufgabe wird gelöst durch ein Kurbelgehäuse-Entlüftungsventil mit den Merkmalen des Patentanspruches 1. Danach enthält ein Kurbelgehäuse-Entlüftungsventil eine Ventilkammer, die an einer Seite von einer Membran und an der gegenüberliegenden Seite von einer Trennwand begrenzt ist. Die Trennwand trennt die Ventilkammer von einem Zyklonabscheider. Der Zyklonabscheider weist einen Gaseinlass auf, der an ein Kurbelgehäuse anschließbar ist. Der Zyklonabscheider weist einen Gasauslass auf, der über einen Leitkanal mit der Ventilkammer verbunden ist. Nahe dem Gasauslass weist der Zyklonabscheider einen Ölauslass auf, der an einen Ölrücklauf anschließbar ist. Ein Saugkanal durchdringt den Zyklonabscheider und ist an seinem einen Ende an eine Unterdruckquelle anschließbar. Mit seinem zu einem Ventilsitz ausgebildeten anderen Ende ragt der Saugkanal in die Ventilkammer. Der Ventilsitz wirkt mit der Membran zusammen, wobei die Membran in Öffnungsrichtung federbelastet ist.The object of the invention is to provide a crankcase ventilation valve with integrated pressure control and oil separation unit, the few sealed joints and a compact design. The object is achieved by a crankcase ventilation valve with the features of claim 1. Thereafter, a crankcase ventilation valve includes a valve chamber which is bounded on one side by a membrane and on the opposite side by a partition wall. The partition wall separates the valve chamber from a cyclone separator. The cyclone separator has a gas inlet which can be connected to a crankcase. The cyclone separator has a gas outlet, which is connected via a guide channel with the valve chamber. Near the gas outlet points the cyclone separator an oil outlet, which is connectable to an oil return. A suction channel penetrates the cyclone and can be connected at its one end to a vacuum source. With its formed to a valve seat other end of the suction port protrudes into the valve chamber. The valve seat cooperates with the membrane, wherein the membrane is spring-loaded in the opening direction.

Da der Zyklonabscheider und die Ventilkammer direkt benachbart sind und der Saugkanal den Zyklonabscheider durchdringt, kann das gesamte Ventil in einem Gehäuse liegen, welches zum Beispiel als einteiliges Spritzgussteil herstellbar ist. Die Trennwand ist in das Spritzgussteil nachträglich einsetzbar. Hierdurch entsteht an der Ventilaußenwand keine weitere abzudichtende Fügestelle mit Kontakt zur Umgebung des Ventils. Die Dichtheitsanforderung an die eingesetzte Trennwand ist gering, da zwischen Zyklonabscheider und Ventilkammer kaum ein Druckunterschied herrscht. Die einzige Fügestelle mit Dichtheitsanforderungen gegenüber der Umwelt entsteht durch Anbringen der Membran an der einen Seite der Ventilkammer. Da wesentliche Teile des Ventils in einem einzigen Bauteil integrierbar sind, reduziert sich die Gesamtzahl der Einzelteile des Ventils. Die Anordnung von Zyklonabscheider, Ventilkammer und Saugkanal führt zu geometrisch einfachen Bauteilen und zu kleinem Bauvolumen des gesamten Ventils.Since the cyclone separator and the valve chamber are directly adjacent and the suction passage penetrates the cyclone separator, the entire valve can lie in a housing which can be produced, for example, as a one-piece injection-molded part. The partition is subsequently used in the injection molded part. This results in the valve outer wall no further sealed joint with contact to the environment of the valve. The tightness requirement for the partition used is low, since there is hardly any pressure difference between the cyclone separator and the valve chamber. The only joint with environmental sealing requirements is created by attaching the membrane to one side of the valve chamber. Since essential parts of the valve can be integrated in a single component, the total number of individual parts of the valve is reduced. The arrangement of cyclone separator, valve chamber and suction channel leads to geometrically simple components and to small overall volume of the entire valve.

In einer vorteilhaften Ausführungsform weist das Ventil einen im wesentlichen hohlkegelförmigen Zyklonabscheider auf. Der Zyklonabscheider ist so an der Ventilkammer angeordnet, dass die Kegelbasis der Ventilkammer zugewandt ist und die Mittellängsachse des Kegels im wesentlichen senkrecht auf der Membran steht. Hierdurch ergibt sich eine geometrisch weiter vereinfachte Form des Ventils. Der Zyklonabscheider mit angeformter Ventilkammer und angeformtem Saugkanal kann spritzgusstechnisch unaufwendig hergestellt werden.In an advantageous embodiment, the valve has a substantially hollow cone-shaped cyclone separator. The cyclone separator is arranged on the valve chamber, that the cone base faces the valve chamber and the central longitudinal axis of the cone is substantially perpendicular to the membrane. This results in a geometrically simplified Shape of the valve. The cyclone separator with molded valve chamber and molded suction channel can be produced inexpensively injection molding technology.

In einer weiteren Ausführungsform ist der Saugkanal im wesentlichen koaxial zur Mittellängsachse des Kegels angeordnet. So kann der in den Zyklonabscheider eintretende Gasstrom ungehindert den Saugkanal umkreisen, was zu einer effektiven Ölabscheidung im Zyklon führt.In a further embodiment, the suction channel is arranged substantially coaxially to the central longitudinal axis of the cone. Thus, the gas stream entering the cyclone separator can freely circulate the suction channel, which leads to an effective oil separation in the cyclone.

In einer weiteren Ausführungsform ist der Saugkanal koaxial innerhalb des Leitkanals angeordnet, wobei die Trennwand Durchbrechungen aufweist, die mit dem Leitkanal fluidisch verbunden sind. Die koaxiale Anordnung von Leit- und Saugkanal ist platzsparend und vereinfacht die Herstellung des Ventils weiter. Die Durchbrechungen in der Trennwand für den Leitkanal sind fertigungstechnisch leicht zu realisieren.In a further embodiment, the suction channel is arranged coaxially within the guide channel, wherein the partition wall has openings which are fluidically connected to the guide channel. The coaxial arrangement of the guide and suction channel saves space and further simplifies the production of the valve. The openings in the partition wall for the guide channel are easy to implement in terms of manufacturing technology.

Eine weitere Ausführungsform der Erfindung sieht vor, dass der Leitkanal von einem Rohr umgrenzt ist, das an seiner der Ventilkammer zugewandten Stirnseite mit der Trennwand verbunden ist. Die Trennwand und das Rohr bilden so ein einziges Bauteil, das leicht herstellbar und handhabbar ist und beim Zusammenbau des Ventils einfach in das Gehäuse einsetzbar ist. Die Anzahl der Einzelteile des Ventils wird dadurch weiter reduziert.A further embodiment of the invention provides that the guide channel is bounded by a tube which is connected at its end facing the valve chamber with the partition wall. The partition wall and the tube thus form a single component which is easy to manufacture and handle and can be easily inserted into the housing during assembly of the valve. The number of individual parts of the valve is thereby further reduced.

Eine weitere Ausführungsform der Erfindung sieht eine den Ventilsitz umfassende Schraubenfeder vor, die einerseits die Federbelastung der Membran bewerkstelligt und sich andererseits an der Trennwand abstützt. Nach der Montage des Ventils wird die Trennwand durch die Feder in ihrer Einbauposition gehalten, weshalb keine zusätzlichen Maßnahmen zur Befestigung der Trennwand im Ventil nötig sind.A further embodiment of the invention provides a helical spring which encompasses the valve seat and, on the one hand, accomplishes the spring loading of the membrane and, on the other hand, is supported on the dividing wall. After assembly of the valve, the partition is held by the spring in its installed position, why no additional measures for fixing the partition in the valve are necessary.

Eine weitere Ausführungsform der Erfindung sieht zwischen dem äußeren Rand der Trennwand und dem Ventilgehäuse eine Labyrinthdichtung vor. Die Labyrinthdichtung kann durch bei der Fertigung der Bauteile leicht realisierbare Nuten und Federn ausgeführt sein, die beim Zusammenbau des Ventils ineinander greifen. Die Dichtwirkung der Labyrinthdichtung entsteht während der ersten Betriebsphase des Kurbelgehäuseentlüftungsventils selbsttätig, wenn ölhaltige Gase vom Zyklonabscheider her in die Labyrinthdichtung eindringen und die eingebrachten Ölpartikel den labyrinthförmigen Spalt der Dichtung dauerhaft zusetzen. Durch diese Maßnahme werden zusätzliche Dichtringe oder Dichtmasse vermieden.A further embodiment of the invention provides a labyrinth seal between the outer edge of the partition wall and the valve housing. The labyrinth seal can be carried out by easily realized in the manufacture of the components grooves and springs, which engage in the assembly of the valve. The sealing effect of the labyrinth seal is created automatically during the first phase of operation of the crankcase ventilation valve when oily gases penetrate from the cyclone separator into the labyrinth seal and the introduced oil particles permanently clog the labyrinth-shaped gap of the seal. By this measure additional sealing rings or sealant are avoided.

Für eine weitere Beschreibung der Erfindung wird auf die Ausführungsbeispiele der Zeichnung verwiesen. Es zeigen:

Fig. 1
einen Schnitt durch ein Kurbelgehäuseentlüftungsventil in einer schematischen Prinzipdarstellung,
Fig. 2
ein aus einer Trennwand und einem daran angesetzten Rohr bestehendes Bauteil des Ventils von Fig. 1 in einer perspektivischen Prinzipdarstellung.
For a further description of the invention reference is made to the embodiments of the drawing. Show it:
Fig. 1
a section through a crankcase ventilation valve in a schematic schematic diagram,
Fig. 2
a consisting of a partition wall and an attached pipe existing component of the valve of Fig. 1 in a perspective schematic representation.

Das in Fig. 1 dargestellte Kurbelgehäuseentlüftungsventil weist als Hauptbestandteile einen kegel- bzw. trichterförmigen Zyklonabscheider 2 und einen Druckregler 4 auf. Die Wand bzw. das Gehäuse 28 des Zyklonabscheiders ist im Bereich seines Endes von einem Gaseinlass 6 und im Bereich seines verengten Endes von einem Ölauslass 8 durchbrochen. Der Gaseinlass 6 mündet in einen angeformten Stutzen 10, auf den eine Anschlussleitung 12 aufgeschoben ist, die zum Kurbelgehäuse eines Motors (nicht dargestellt) führt. Der Ölauslass 8 mündet in einen Stutzen 14, auf den eine Anschlussleitung 16 aufgesteckt ist, die zum Ölsumpf des Motors führt. Der Zyklonabscheider 2 ist koaxial zu seiner Mittellängsachse 5 von einem rohrförmigen Saugkanal 14 durchdrungen, dessen eines Ende 19 sich aus dem Gehäuse 28 heraus erstreckt und in einen Stutzen 17 mündet. Auf diesen ist eine Anschlussleitung 18 aufgesteckt, die zum Saugrohr (nicht dargestellt) des Motors führt.The crankcase ventilation valve shown in FIG. 1 has as main components a conical or funnel-shaped cyclone separator 2 and a pressure regulator 4. The wall or the housing 28 of the cyclone separator is interrupted in the region of its end by a gas inlet 6 and in the region of its narrowed end by an oil outlet 8. The gas inlet 6 opens into a molded neck 10, on which a connecting line 12 is pushed, which leads to the crankcase of a motor (not shown). The oil outlet 8 opens into a nozzle 14, on which a connecting line 16 is attached, which leads to the oil sump of the engine. The cyclone separator 2 is penetrated coaxially with its central longitudinal axis 5 by a tubular suction channel 14, whose one end 19 extends out of the housing 28 and opens into a connecting piece 17. On these a connecting line 18 is attached, which leads to the intake manifold (not shown) of the engine.

Am anderen Ende 20 verjüngt sich der Saugkanal 14 kegelförmig zu einem Ventilsitz 24. Der verjüngte Kanalabschnitt geht mit einer sich radial erstreckenden Anschlagschulter 22 in den nicht verjüngten Kanalabschnitt über. Die Anschlagschulter 22 ist koaxial zur Mittellängsachse 5 und in einer senkrecht zu dieser verlaufenden Ebene angeordnet. Am verengten Ende des Gehäuses 28 ist eine von Saugkanal 14 durchsetzte und mit ihrem Rand an dessen Außenumfangsfläche anliegende Öffnung 29 vorhanden.At the other end 20, the suction channel 14 tapers conically to a valve seat 24. The tapered channel section merges with a radially extending stop shoulder 22 in the non-tapered channel section. The stop shoulder 22 is arranged coaxially to the central longitudinal axis 5 and in a direction perpendicular to this plane. At the constricted end of the housing 28 is penetrated by a suction channel 14 and with its edge on the outer peripheral surface fitting opening 29 is present.

Das weite Ende des Zyklonabscheiders 2 wird von einem zylinderförmigen Längsabschnitt 31 gebildet, der stirnseitig von einem Gehäusedeckel verschlossen ist. In dem Längsabschnitt ist eine Trennwand 32 vorhanden, die sich quer zur Mittellängsachse 5 und über den gesamten Innenquerschnitt des Längsabschnitts erstreckt. Die Trennwand 32 ist mit Axialabstand zum Gehäusedeckel 56 angeordnet. Der von dem Gehäuse 28, der Trennwand 32 und dem Gehäusedeckel umgrenzte Raum bildet eine Ventilkammer 30. In der Trennwand ist eine zentrale Öffnung 33 vorhanden, die vom Ende 20 des Saugkanals 14 durchgriffen ist. Der Rand der Öffnung 33 stützt sich auf der Anschlagschulter 22, der Rand der kreisförmigen Trennwand 32 auf einem Ringflansch 37 ab, welcher sich von der Innenwandung des Längsabschnitts 31 radial nach innen erstreckt.The wide end of the cyclone separator 2 is formed by a cylindrical longitudinal section 31, which is closed at the end by a housing cover. In the longitudinal section there is a partition wall 32 which extends transversely to the central longitudinal axis 5 and over the entire inner cross section of the longitudinal section. The partition wall 32 is arranged at axial distance from the housing cover 56. The bounded by the housing 28, the partition wall 32 and the housing cover space forms a valve chamber 30. In the partition, a central opening 33 is present, which is penetrated by the end 20 of the suction channel 14. The edge of the opening 33 is supported on the stop shoulder 22, the edge of the circular partition 32 on an annular flange 37, which extends from the inner wall of the longitudinal portion 31 radially inwardly.

An der dem Ende 19 des Saugkanals 14 zugewandten Seite der Trennwand 32 ist ein Rohr 34 mit seiner einen Stirnseite 36 angeformt. Das Rohr 34 umfasst den Saugkanal 14 koaxial und mit Radialabstand, wobei der zwischen dem Saugkanal 14 und dem Rohr vorhandene Ringraum einen im Folgenden mit Leitkanal 40 bezeichneten weiteren Kanal bildet. Der Leitkanal 40 ist an seinem der Trennwand zugewandten Ende über Durchbrechungen 44 in der Trennwand 32 mit der Ventilkammer 30 fluidisch verbunden. Das Rohr 34 endet mit Axialabstand vor der Öffnung 29 des Gehäuses 20. Die von der Trennwand 32 abgewandten Stirnseite des Rohres 34 und der Wand 38 des Saugkanals 14 vorhandene Ringöffnung bildet einen Gasauslass 42.At the end 19 of the suction channel 14 facing side of the partition wall 32, a pipe 34 is integrally formed with its one end face 36. The tube 34 comprises the suction channel 14 coaxially and at radial distance, wherein the annular space present between the suction channel 14 and the tube forms a further channel designated below as a guide channel 40. The guide channel 40 is fluidly connected at its end facing the partition via openings 44 in the partition wall 32 with the valve chamber 30. The tube 34 terminates at an axial distance in front of the opening 29 of the housing 20. The end face of the tube 34 facing away from the dividing wall 32 and the wall 38 of the suction channel 14 form a gas outlet 42.

Am kreisförmigen Rand 46 der Trennwand 32 sind an dieser kreisförmig umlaufende Federn 48 konzentrisch zur Mittellängsachse 5 angeformt. Am Ringflansch 37 sind korrespondierend zu den Federn 48 umlaufende Nuten 50 angeformt, in die die Federn 48 eingreifen. Die Federn 48 und Nuten 50 wirken nach Art einer Labyrinthdichtung zusammen und dichten den Zyklonabscheider 2 gegenüber der Ventilkammer 30 ab.At the circular edge 46 of the partition wall 32 are formed on this circular circumferential springs 48 concentric with the central longitudinal axis 5. On the annular flange 37 corresponding circumferential grooves 50 are formed corresponding to the springs 48, in which the springs 48 engage. The springs 48 and grooves 50 cooperate in the manner of a labyrinth seal and seal the cyclone separator 2 from the valve chamber 30.

Auf Stirnseite des Längsabschnitts 52 liegt eine elastische kreisrunde Membran 54 mit ihrem Randbereich auf. Durch den Gehäusedeckel 56, der mit Aussparungen 58 am Gehäuse 28 angebrachte Rastnasen 60 hintergreift, ist die Membran 54 auf der Stirnseite 52 mechanisch fest und dichtend aufgepresst. Der Gehäusedeckel 56 weist eine Öffnung 62 auf, die den zwischen Membran 54 und Gehäusedeckel 56 vorhandenen Spaltraum mit der Atmosphäre verbindet.On the front side of the longitudinal section 52 is an elastic circular membrane 54 with its edge region. Through the housing cover 56, which engages with recesses 58 on the housing 28 mounted latching lugs 60, the membrane 54 is mechanically fixed and sealingly pressed on the end face 52. The housing cover 56 has an opening 62 which connects the existing between the diaphragm 54 and the housing cover 56 gap with the atmosphere.

Eine Schraubenfeder 64 beaufschlagt die Membran 54 federnd in Richtung vom Ventilsitz 24 weg, also in Öffnungsrichtung des Ventils. Die Schraubenfeder 64 stützt sich hierzu an der Trennwand 32 ab und drückt diese gegen die Anschlagschulter 22. Gleichzeitig werden durch die Schraubenfeder 64 die Federn 48 in die Nuten 50 gedrückt.A helical spring 64 acts on the diaphragm 54 resiliently in the direction away from the valve seat 24, ie in the opening direction of the valve. The coil spring 64 is supported for this purpose on the partition wall 32 and pushes it against the stop shoulder 22. At the same time, the springs 48 are pressed into the grooves 50 by the coil spring 64.

Die Funktionsweise des Kurbelgehäuseentlüftungsventils ist die Folgende: In Richtung 100 strömt der vom Kurbelgehäuse kommende und mit Ölpartikeln durchsetzte Strom von Kurbelgehäusegas in den Zyklonabscheider 2 ein. In einer spiralförmigen Bahn strömt das Öl-Gasgemisch an der Innenwand 102 des Zyklonabscheiders in Richtung des Gasauslasses 42 und umkreist das Rohr 34. Hierbei schlagen sich durch die auftretenden Zentrifugalkräfte an der Innenwand 102 des Zyklonabscheiders 2 Öltröpfchen nieder, die entlang der Innenwand 102 zum Ölauslass 8 strömen.The operation of the crankcase ventilation valve is the following: In direction 100, the flow of crankcase gas coming from the crankcase and penetrated by oil particles flows into the cyclone separator 2. In a helical path, the oil-gas mixture flows on the inner wall 102 of the cyclone separator in the direction of the gas outlet 42 and circles the tube 34. In this case, the centrifugal forces on the inner wall 102 of the cyclone separator 2 precipitate oil droplets which travel along the inner wall 102 to the oil outlet 8 stream.

Während der ersten Betriebsphase des Kurbelgehäuse-Entlüftungsventils strömt ölpartikelführendes Kurbelgehäusegas ein Stück weit in die Labyrinthdichtung, also die Zwischenräume zwischen den Federn 48 und den Nuten 50. Die Zwischenräume werden hierdurch dauerhaft durch Öl zugesetzt, so dass fortan kein ölführendes Gas vom Zyklonabscheider 2 durch die Labyrinthdichtung in die Ventilkammer 30 eindringen kann.During the first phase of operation of the crankcase ventilation valve, oil-particle-carrying crankcase gas flows a little way into the labyrinth seal, that is, the gaps between the springs 48 and the grooves 50. The gaps are thereby permanently added by oil, so that henceforth no oil-carrying gas from the cyclone separator 2 through the Labyrinth seal can penetrate into the valve chamber 30.

Das an der Innenwand 102 abgeschiedene Öl strömt in Richtung 103 zurück zum Ölsumpf des Motors. Da in der Ventilkammer 30 ein geringfügig kleinerer Druck als im Ölsumpf herrscht, nimmt das von Öl größtenteils befreite Gas den Weg entlang der Richtung 104. Es strömt durch den Leitkanal 40 in die Ventilkammer 30. Vom Saugrohr des nicht dargestellten Motors her ist der Saugkanal 14 mit Unterdruck beaufschlagt, so dass das Gas von der Ventilkammer 30 in Richtung 106 durch den Ventilsitz 24 aus der Ventilkammer 30 ausströmt und so der Ansaugluft des nichtdargestellten Motors wieder zugeführt wird.The deposited on the inner wall 102 oil flows in the direction 103 back to the oil sump of the engine. Since there is a slightly lower pressure in the valve chamber 30 than in the oil sump, the largely oil-free gas takes the path along the direction 104. It flows through the guide channel 40 in From the intake manifold of the engine, not shown, the suction channel 14 is subjected to negative pressure, so that the gas flows from the valve chamber 30 in the direction 106 through the valve seat 24 from the valve chamber 30 and the intake air of the unillustrated motor is supplied again.

Die Schraubenfeder 64 ist derart dimensioniert, dass beim Überschreiten einer bestimmten Druckdifferenz zwischen der Ventilkammer 30 und dem Saugkanal 14 sich die Membran 54 in Richtung 108 dichtend gegen den Ventilsitz 24 legt und die Öffnung 110 des Saugkanals 14 verschließt. Die Dämpfung der Membran 54 beim Verschließen bzw. Freigeben des Saugkanals 14 ist durch den Querschnitt der Öffnung 62 vorgebbar. Dadurch wird nämlich Menge der Luft bestimmt, die maximal pro Zeiteinheit durch die Öffnung 62 in den Zwischenraum zwischen Membran 54 und Gehäusedeckel 56 ein- oder aus diesem ausströmen kann.The helical spring 64 is dimensioned such that when a certain pressure difference between the valve chamber 30 and the suction channel 14 is exceeded, the membrane 54 seals in the direction 108 against the valve seat 24 and closes the opening 110 of the suction channel 14. The damping of the diaphragm 54 when closing or releasing the suction channel 14 can be predetermined by the cross section of the opening 62. As a result, the amount of air is determined, the maximum per unit time through the opening 62 in the space between the diaphragm 54 and the housing cover 56 on or can flow out of this.

Fig. 2 zeigt in perspektivischer Darstellung ein aus der Trennwand 32 und dem Rohr 34 zusammengesetztes Bauteil mit den Durchbrechungen 44, durch dessen Öffnung 33 im Montagezustand das sich verjüngende Ende mit dem Ventilsitz 24 des Saugkanals 14 ragt. Auf der in Fig. 2 nicht sichtbaren Unterseite der Trennwand 32 sind im Bereich deren Randes 46 die kreisförmig umlaufenden Federn 48 angeformt.Fig. 2 shows a perspective view of a composite of the partition wall 32 and the pipe 34 component with the openings 44, through the opening 33 in the assembled state, the tapered end protrudes with the valve seat 24 of the suction channel 14. On the underside of the dividing wall 32, which is not visible in FIG. 2, the circular peripheral springs 48 are formed in the region of their edge 46.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

22
Zyklonabscheidercyclone
33
Kegelbasiscone base
44
Druckreglerpressure regulator
55
Mittellängsachsecentral longitudinal axis
66
Gaseinlassgas inlet
88th
Ölauslassoil outlet
1010
StutzenSupport
1212
Anschlussleitungconnecting cable
1414
Saugkanalsuction
1616
Anschlussleitungconnecting cable
1717
StutzenSupport
1818
Anschlussleitungconnecting cable
1919
EndeThe End
2020
EndeThe End
2222
Anschlagschulterstop shoulder
2424
Ventilsitzvalve seat
2626
Umfangscope
2828
Gehäusecasing
2929
Öffnungopening
3030
Ventilkammervalve chamber
3131
Längsabschnittlongitudinal section
3232
Trennwandpartition wall
3333
Öffnungopening
3434
Rohrpipe
3636
Stirnseitefront
3737
Ringflanschannular flange
3838
Wandwall
4040
Leitkanalguide channel
4242
Gasauslassgas outlet
4444
Durchbrechungperforation
4646
Randedge
4848
Federfeather
5050
Nutgroove
5252
Stirnseitefront
5454
Membranmembrane
5656
Gehäusedeckelhousing cover
5858
Aussparungrecess
6060
Rastnaselocking lug
6262
Öffnungopening
6464
Schraubenfedercoil spring
100100
Richtungdirection
102102
Innenwandunginner wall
103,104,106,108103,104,106,108
Richtungdirection

Claims (7)

  1. Crankcase ventilation valve having an integrated cyclone separator (2) with the following features:
    a valve chamber (30) is delimited at one side by a diaphragm (54) and at the other side by a separating wall (32) which separates the valve chamber (30) from the cyclone separator (2),
    the cyclone separator (2) has a gas inlet (6) which can be attached to a crankcase, a gas outlet (42) which can be connected via a guiding duct (40) to the valve chamber (30), and, close to the gas outlet, an oil outlet (8) which can be attached to an oil return line,
    a suction duct (14), which can be attached at one end to a vacuum source, extends though the cyclone separator (2) and projects, at its other end which is designed so as to form a valve seat (24), into the valve chamber (30),
    the valve seat (24) interacts with the diaphragm (54) which is spring-loaded in the opening direction.
  2. Valve according to Claim 1, characterized by a substantially hollow conical cyclone separator (2) whose cone base (3) faces towards the valve chamber (30).
  3. Valve according to Claim 2, characterized in that the suction duct (14) is arranged substantially coaxially with respect to the central longitudinal axis (5) of the cyclone separator (2).
  4. Valve according to one of the preceding claims, characterized in that the suction duct (14) is arranged coaxially within the guiding duct (40), and the separating wall has apertures (44) for the guiding duct, said apertures being fluidically connected to the guiding duct (40).
  5. Valve according to Claim 4, characterized in that the guiding duct (40) is enclosed by a tube which is connected, at its end side which faces towards the valve chamber (30), to the separating wall.
  6. Valve according to one of the preceding claims, characterized in that the spring loading of the diaphragm (54) is effected by a coil spring (64) which surrounds the valve seat (24) and is supported on the separating wall (32).
  7. Valve according to one of the preceding claims, characterized in that a labyrinth seal is provided between the outer edge of the separating wall (32) and the valve housing.
EP04000598A 2003-01-14 2004-01-14 Blowby gas valve with integrated cyclone separator Expired - Lifetime EP1447531B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10301028 2003-01-14
DE10301028A DE10301028A1 (en) 2003-01-14 2003-01-14 Ventilation valve for a crank housing with an integrated cyclone separator comprises a valve chamber defined on one side by a membrane and on the opposite-lying side by a separating wall

Publications (2)

Publication Number Publication Date
EP1447531A1 EP1447531A1 (en) 2004-08-18
EP1447531B1 true EP1447531B1 (en) 2006-12-13

Family

ID=32602517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04000598A Expired - Lifetime EP1447531B1 (en) 2003-01-14 2004-01-14 Blowby gas valve with integrated cyclone separator

Country Status (3)

Country Link
EP (1) EP1447531B1 (en)
AT (1) ATE348249T1 (en)
DE (2) DE10301028A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033677B4 (en) * 2004-07-09 2016-03-03 Volkswagen Ag Combination of a pressure control valve and an oil separator for venting gases of a crankcase
DE202005013112U1 (en) * 2005-08-17 2006-12-28 Hengst Gmbh & Co.Kg Oil separator for separating oil from the crankcase ventilation gas of an internal combustion engine
DE102010027785B4 (en) * 2010-04-15 2020-12-03 Hengst Se Oil mist separator with a housing with a removable cover
CN104265402B (en) * 2014-09-18 2017-01-11 中国第一汽车股份有限公司 Active oil-gas separator
CN105422215B (en) * 2015-11-13 2018-01-26 浙江三好汽车部件有限公司 A kind of gs-oil separator composition and its oil and gas separation method
CN108167046A (en) * 2017-12-27 2018-06-15 天津惠德汽车进气系统股份有限公司 A kind of novel diesel aspirating device
CN111173587B (en) * 2019-12-31 2021-04-16 潍柴动力股份有限公司 Pressure regulating method, regulating device and regulating system of PCV valve body

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152747C2 (en) * 1981-07-18 1984-01-26 Bayerische Motoren Werke Ag, 8000 Muenchen Cyclone oil separator
DE4404709C1 (en) * 1994-02-15 1995-06-08 Freudenberg Carl Fa Separator of liquid from liquid-bearing gas
DE19700733C2 (en) * 1997-01-11 2001-11-22 Bayerische Motoren Werke Ag Crankcase ventilation through the cylinder head cover with integrated additional functions
DE19707597A1 (en) * 1997-02-26 1998-08-27 Knecht Filterwerke Gmbh Cyclone with ventilating valve behind it in flow direction
DE19838247A1 (en) * 1998-08-22 2000-02-24 Knecht Filterwerke Gmbh Oil mist separator for internal combustion engine has return valve shutting off or opening passage of fluid flow through outlet depending upon pressure head value on cyclone side of valve

Also Published As

Publication number Publication date
DE10301028A1 (en) 2004-07-29
EP1447531A1 (en) 2004-08-18
DE502004002256D1 (en) 2007-01-25
ATE348249T1 (en) 2007-01-15

Similar Documents

Publication Publication Date Title
DE19700733C2 (en) Crankcase ventilation through the cylinder head cover with integrated additional functions
DE102011106593B4 (en) Housing for an internal combustion engine and a positive crankcase ventilation PCV valve attached to the housing, and a method of attaching a PCV valve to a housing
EP2021592B1 (en) Device for ventilating a crankcase
DE102012207829B4 (en) Blowby flow control system for a turbocharged engine
DE69222855T2 (en) COMBINED AIR FILTER, AIR-OIL SEPARATOR AND AIR SOUND ABSORBER
DE102010051660B4 (en) Crankcase ventilation system and crankcase ventilation nozzle
EP2501922B1 (en) Intake pipe section and intake module
EP3842119A1 (en) Filter element, oil separator and method for regulating the pressure in a crankcase ventilation system
EP1447531B1 (en) Blowby gas valve with integrated cyclone separator
DE102009015018A1 (en) internal combustion engine
DE202014003301U1 (en) ventilation system
EP0730086B1 (en) Cyclone separator for the crankcase ventilation of an internal combustion engine with a ventilation valve
EP1000228B1 (en) Valve for sucking up gases from an internal combustion engine crankcase
DE4130582A1 (en) MEMBRANE CARBURETTOR
WO2016135072A1 (en) Internal combustion engine
EP2295781A2 (en) Waste gas recovery system for a combustion engine and waste gas recovery valve
DE112012006527T5 (en) Housing breather valve with integrated vacuum generator and check valves
DE102016117575B4 (en) Air supply control system for an internal combustion engine
EP2557281B1 (en) Combustion engine
DE102014220511A1 (en) TURBOCHARGER
DE102019116509B4 (en) Valve device for an internal combustion engine
EP0348743B1 (en) Crank case air extractor for an internal-combustion engine
DE102016223955A1 (en) separating
DE202014007835U1 (en) internal combustion engine
DE102015112185B4 (en) valve device

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: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20041124

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 20061213

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 502004002256

Country of ref document: DE

Date of ref document: 20070125

Kind code of ref document: P

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070131

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

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070313

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070313

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070324

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070305

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070514

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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

Effective date: 20070914

BERE Be: lapsed

Owner name: ALFMEIER PRAZISION A.G. BAUGRUPPEN UND SYSTEMLOSU

Effective date: 20070131

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

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070131

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070314

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080131

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

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

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

Ref country code: AT

Payment date: 20090122

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: 20090123

Year of fee payment: 6

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

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070114

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

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

Ref country code: DE

Payment date: 20090325

Year of fee payment: 6

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070614

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

Ref country code: FR

Payment date: 20090120

Year of fee payment: 6

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

Effective date: 20100114

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100930

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100201

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100803

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100114

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100114