EP1329598B1 - Pressure regulating valve for a crankcase ventilating system - Google Patents

Pressure regulating valve for a crankcase ventilating system Download PDF

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Publication number
EP1329598B1
EP1329598B1 EP20020026221 EP02026221A EP1329598B1 EP 1329598 B1 EP1329598 B1 EP 1329598B1 EP 20020026221 EP20020026221 EP 20020026221 EP 02026221 A EP02026221 A EP 02026221A EP 1329598 B1 EP1329598 B1 EP 1329598B1
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EP
European Patent Office
Prior art keywords
housing
pressure regulating
diaphragm
regulating valve
membrane
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
EP20020026221
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German (de)
French (fr)
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EP1329598A1 (en
Inventor
Bruno Hezel
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1329598A1 publication Critical patent/EP1329598A1/en
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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
    • F01M13/0011—Breather valves
    • 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
    • F01M2013/0016—Breather valves with a membrane

Definitions

  • Internal combustion engines typically include a crankcase breather equipped with a pressure control valve.
  • the pressure regulating valve comprises a deformable membrane of an elastomeric material.
  • the pressure control valve serves as a vent valve and has the task of keeping the internal pressure in the crankcase as constant as possible at a presettable level. This is necessary to ensure the tightness of the internal combustion engine against leakage of engine oil to the outside.
  • DE 196 42 219 A1 has a ⁇ labscheidevorraum in compact design for the subject. This is used in particular in internal combustion engines of motor vehicles and serves for the separation of oil from an oil-gas mixture.
  • a ⁇ labscheideelement is arranged, which is designed as a at least one, preferably a plurality of passages having helix.
  • the helix having the passages comprises additional structures for oil separation, the helix enclosing a central space.
  • the additional structures are designed as flow ribs.
  • DE 100 08 227 A1 has a device with a membrane arrangement for the subject.
  • a first holding element and a second holding element which are connected to one another via a flared connection.
  • the membrane assembly is clamped in the region of the flare connection in its peripheral region between the first holding element and the second holding element, wherein the first holding element has a flange extending substantially parallel to the membrane arrangement, which ends with a circumferential end face.
  • the second retaining element has a substantially parallel to the membrane assembly extending flange and a crimp ring.
  • the crimp connection is formed by the crimping over the peripheral portion of the membrane assembly and is bent over the circumferential end surface of the first holding element.
  • the peripheral region of the membrane arrangement projects beyond the end face of the first retaining element in the radial direction with a projecting region.
  • the membrane is clamped elastomeric material.
  • DE 197 00 733 A1 relates to a crankcase ventilation with integrated additional functions.
  • the cylinder head cover for a crankcase and a cylinder head having internal combustion engine, especially for motor vehicles devices for separating oil are integrated.
  • a device for regulating the pressure prevailing in the crankcase is embedded in the cylinder head cover.
  • a coil insert for separating oil and a fine separator containing nonwovens, wire mesh, wire wool, yarn or granules is provided in the cylinder head cover.
  • the cylinder head cover further comprises a device for regulating the pressure inside the crankcase, which has a membrane carrier, an elastic membrane, a membrane seal and a sealing structure.
  • diaphragms are used on the pressure regulator / housing bleed valves which are formed as elastomeric membranes.
  • the disadvantage of this material is the strong dependence of its deformability on the temperature. At temperatures below freezing, the elastomer hardens the membrane. This significantly affects the function of the pressure regulator / housing bleed valve.
  • Another disadvantage of elastomeric membranes is the fact that the motor oil and fuel manufacturers often change the additive packages of engine oil and fuel, so that the chemical properties of each additive packages added to the elastomeric material can no longer be reliably predicted and estimated.
  • the pressure regulating valve has an upper part and a lower housing existing housing with a bore valve seat, an insertable therein valve closure, arranged in the housing, a pressure chamber and a reduced pressure space limiting elastic control diaphragm which is disposed between a lower-pressure side diaphragm plate and a pressure-side diaphragm plate, a control pressure spring resting on the diaphragm plate and inside the housing upper part and one on the upper part of the housing arranged pipe socket.
  • the elastic control membrane is designed as a hole punchless thermoplastic membrane and connected without passage connection with the pressure-side diaphragm plate and the low-pressure side diaphragm plate.
  • thermoplastic membrane element is between 0.3 to 0.6 mm.
  • the thermoplastic material also has a substantially higher chemical resistance to the engine oil or additive groups added to the fuel.
  • the use of a thermoplastic membrane also allows the waiver of a biasing spring and a valve cover housing, on which the biasing spring is supported.
  • a bending element For biasing the membrane is used in the present invention, a bending element.
  • the membrane of thermoplastic material may be formed in a wavy structure, which has the advantage that no tensile stresses at the clamping point of the thin-walled membrane arise and only bending stresses occur, which are absorbed by the membrane material itself. Furthermore, the membrane can be formed in a stepped form.
  • the membrane made of thermoplastic material can be attached by joining methods, such as ultrasonic welding or friction welding or by gluing to the housing of the pressure regulating / housing ventilation valve. This makes it possible to complete the thermoplastic membrane without additional effort and parts supply to the end-functional unit on the housing.
  • biasing spring can now be an easy-to-install bending beam, which acts on the thin-walled membrane made of thermoplastic material, can be used, which can be easily inserted into the housing of the pressure control / housing ventilation valve.
  • FIG. 1 shows the perspective view of a crankcase breather integrated in the cylinder head cover with separator components connected in series.
  • a cylinder head cover 1 on an internal combustion engine connected in series components for crankcase ventilation are integrated.
  • the cylinder head cover 1 is detachably mounted in the cylinder head region of an internal combustion engine by means of fastening apertures 2, which are penetrated by screws, and can be easily disassembled therefrom.
  • separation components for the separation of droplets or aerosols from an oil / gas mixture are included in the cavity 4 of the cylinder head cover 1 .
  • the coil 9 comprises one or preferably a plurality of passages 10, which are flowed through from the top of the pre-separator 5 oil / gas flow in the vertical direction from top to bottom.
  • the coil 9 comprises one or preferably a plurality of passages 10, which are flowed through from the top of the pre-separator 5 oil / gas flow in the vertical direction from top to bottom.
  • fine separator 12 may be provided a ring-shaped yarn package, a nonwoven fabric, a knit, a wire tangle or a textile coating are withdrawn with the aerosols from the cyclone 8 leaving and flowing over the overflow 11 in the fine separator 12 oil / gas mixtures. Purified in the fine separator, the oil / gas mixture flows via a channel 14 into a pressure regulating / housing ventilation valve 15. This comprises a cover element 16 which covers a deformable membrane 17 embedded in a housing 18 of the pressure regulating / housing ventilation valve 15.
  • FIG. 2 shows the flow of the oil / gas mixture through the components connected one behind the other in the cavity of a cylinder head cover for oil separation.
  • the thicker arrows indicate the oil / gas mixture flow flowing through the separation components 5, 8, 12 and 15, respectively, which continuously flows through the components for oil separation 5, 8, 12 and 15 which are connected one behind the other and during the passage of the separation components 5, 8, 12 connected in series or 15 a cleaning or removal of oil droplets or finely dissolved aerosols experiences.
  • the incoming oil / gas mixture flow over a labyrinth 6 forming ribs 7 is deflected several times before the emerging from the pre-separator 5 oil / gas mixture flow enters the coil 9 of a cyclone 8, wherein the coil 9 preferably with multiple passages 10th Is provided.
  • the oil / gas mixture flow leaves the cyclones and enters a pre-separator 12, at the lower end of an outlet in a lubricant reservoir or the crankcase of an internal combustion engine is indicated.
  • the oil / gas mixture flows into a channel 14, which opens into a pressure control valve 15, which is provided according to the known embodiments of the prior art with a cover member 16 in which a membrane element 17, in the Usually made of an elastomeric material, is clamped.
  • the membrane element 17 made of elastomeric material can also be clamped directly in the housing 18.
  • Figure 3 shows the schematic representation of a pressure control / housing venting valve with elastomeric membrane according to the prior art.
  • the membrane element 17 according to the illustration in FIG. 3 consists of an elastomeric material which is clamped to the housing 18 via the cover designated by position 16 in FIG. At its lower end, a control gap 19 of approximately 1 mm is indicated between a plane surface of the housing 18 and a depression in the membrane element 17.
  • the membrane element 17 is acted upon by a costly and expensive to manufacture compression spring 20 and is movable in the direction of the designated by reference numeral 23 double arrow in the vertical direction.
  • the incoming gas flow acting on the membrane element 17 is marked by reference numeral 21 and passes through an entry opening 22 formed in the plane surface of the housing 18.
  • Figures 4 and 4.1 show a first embodiment of a membrane for a pressure control / housing ventilation valve made of a thermoplastic material having a wavy formed deformation region.
  • membrane 24 connected to the housing 18 is of a corrugated design.
  • the waveform is designated by reference numeral 38 and extends from the center of the membrane 24, which is formed by a molded-on pin 32 and a molded foot 26 in this embodiment, in the radial direction to the periphery 35 of the membrane 24 of thermoplastic material.
  • the first embodiment of the membrane 24 made of thermoplastic material can be avoided by the waveform of the membrane 24, the occurrence of impermissibly high tensile stresses, but only bending stresses occur.
  • the membrane 24 is prestressed from thermoplastic material.
  • the end face of the molded onto the membrane 24 of thermoplastic material foot 26 acts as a boundary surface of a control gap above the opening 22 shown in Figure 3 in the flat surface of the housing 18 of the pressure control / housing ventilation valve.
  • the membrane 24 of thermoplastic material may be secured at its junctions 25 to the inside of the housing 18 of the pressure regulating / housing venting valve by ultrasonic whitening or by use of a friction welding process. Further, the peripheral surface 35 of the membrane 24 of thermoplastic material can be bonded in waveform to the housing 18.
  • the membrane made of thermoplastic material 24 can thus be completed without additional effort and parts supply to a final functional unit on the housing 18.
  • Reference numeral 43 denotes the thickness of the thermoplastic material of the membrane 24 with a wavy deformation area, the wall thickness 43 (s) being in the range between 0.3 and 0.6 mm.
  • the bending element designated by reference numeral 28 in the illustration according to FIG. 4 can simply be clipped into place at its clamping points 29 on the housing 18.
  • openings 30 and 31 can be made on the housing 18 as shown in detail in FIG.
  • the openings 30 and 31 can extend both in the vertical direction (cf., orientation of the opening 30) and in the horizontal direction (cf., orientation of the openings 31 in the housing 18).
  • a bending element 28 in the form of a bending beam with a round cross section can be easily clipped. This allows both a simple installation as well as a simple disassembly.
  • the bending element can also be formed in another cross section, for example oval or semicircular.
  • FIG. 4.1 shows the plan view of a membrane 24 made of thermoplastic material with a wave-shaped deformation region 38.
  • the membrane surface 34 of the membrane 24 with a corrugated trained deformation range extending from the center formed by the pin 32 to the peripheral surface 35 waves, the valleys and elevations.
  • a deformation area formed in the membrane surface 34 By means of such a deformation area formed in the membrane surface 34, bending stresses which load the membrane surface 34 of the membrane 24 can be absorbed without damaging the membrane 24 of thermoplastic material formed in a wall thickness 43 between 0.3 and 0.6 mm.
  • the bending beam 28 extends over the free surface of the membrane surface 34 within the housing 18.
  • the membrane surface 34 of the membrane 24 made of thermoplastic material at attachment points 25 to the housing permanently connected.
  • the length with which the bending element 28 embodied as a bending beam, for example, spans the membrane surface 34 of the membrane 24 is designated by reference numeral 40.
  • the bending element 28 which is designed, for example, as a bending beam, can abut against a contact surface 33 of the pin 32 molded onto the diaphragm surface 34 in the center, so that a deflection and thus a loss of prestressing when the membrane surface 34 of the diaphragm 24 is pressurized are omitted.
  • FIGS. 5 and 5.1 show a further embodiment variant of a thin-walled membrane made of a thermoplastic material.
  • the membrane can also be configured in stepped form as a stepped membrane 27.
  • the stepped diaphragm 27 may be made of thermoplastic material, be connected to clamping points 25 with the inside of the housing 18 of the pressure control / housing ventilation valve.
  • This embodiment variant of the membrane 27 made of thermoplastic material ensures that tensile stresses are avoided in the membrane 27 when pressure is applied by the inflowing gas 21 (see illustration according to FIG. 3) and that only bending stresses occur.
  • formed in step shape membrane 27 is formed in a wall thickness 43 (s) in the range between 0.3 and 0.6 mm.
  • a bending element 28 clipped into the housing 18 of the pressure regulating / housing ventilation valve, for example.
  • the bending element 28 is clipped into its openings 41 and 42 in openings 30 and 31 (see illustration according to detail X) of the housing 18. As already described above, these openings can be oriented either in the vertical direction or in the horizontal direction.
  • the bending element 28, which is received by the openings 30 and 31, may be formed both in a circular, as well as in an oval cross-section, so that it can be easy to assemble and disassemble without the use of additional tools.
  • FIG. 5 The illustration of the further embodiment variant of a membrane element 27 made of thermoplastic material according to FIG. 5 also shows that a membrane bottom 37 extends annularly and delimits a control gap 19 (see illustration according to FIG.
  • a plateau 39 is delimited on the membrane 27 made of thermoplastic material according to the embodiment in FIG.
  • the injection-molded, step-shaped membrane element 27 comprises a pin 32 injection-molded on the membrane plateau 39, which constitutes a contact surface 33 for the bending element 28 spanning the membrane 27 of thermoplastic material (see illustration according to FIG.
  • the embodiment of the membrane 27 in a stepped shape advantageously allows the pin 32, which is substantially in the center of the membrane surface 34 of the membrane 27 in stepped form, to be directly injected onto the membrane plateau 39.
  • the thin wall thickness 43 in the range between 0.3 and 0.6 mm can be generated easily with the injection molding process;
  • the Spritzg woolher einsclar of the membranes of thermoplastic material be it in corrugated form of Figure 4, or in a stepped form according to Figure 5 has the advantage that the control gap 19 delimiting end face on the foot 26 and the diaphragm bottom 37 directly in the production of To produce component without post-processing is required.
  • the top view of the membrane 27 of thermoplastic material in step shape according to Figure 5.1 it can be seen that extends from the center formed by the pin 32 of the membrane surface 34, the step formation in decreasing step depth from the center 32 in the direction of the peripheral surface 35 in the radial direction.
  • the membrane surface 34 of the step-shaped membrane 27 made of thermoplastic material is spanned by the bending element 28, which is formed in a longitudinal extension 40.
  • the bending element is clipped to the mounting points 41 and 42 shown in Figure 5, for example, in the housing 18 of the pressure control / housing ventilation valve and is supported only on the contact surface 33 of the provided in the center of the diaphragm surface 34 pin 32.
  • the bending element 28 shown here in FIGS. 4, 4.1, 5 and 5.1 is clipped into the housing 18 of the pressure regulating / housing ventilation valve 15 after the membrane 24 made of thermoplastic material with a wave-shaped deformation area or with a stepped deformation area or 27 has been welded or glued at their connection points 25 with the inside of the housing 18.
  • the pressure regulating / housing ventilation valve 15 according to the embodiment variants according to FIGS. 4 and 4.1 or 5 and 5.1 is seated at an exposed point at the highest point of the cylinder head cover on the internal combustion engine, since at this point Position the best possible removal of the crankcase gases of an internal combustion engine, be it a self-igniting or a spark-ignited internal combustion engine, can be performed.
  • the proposed pressure control / housing ventilation valve can also be used on other units, for example, cultivation units for oil separation.

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

Description

Technisches GebietTechnical area

Verbrennungskraftmaschinen umfassen in der Regel eine Kurbelgehäusentlüftung, die mit einem Druckregelventil ausgestattet ist. Das Druckregelventil umfaßt eine verformbare Membran aus einem Elastomermaterial. Das Druckregelventil dient als Entlüftungsventil und hat die Aufgabe, den Innendruck im Kurbelgehäuse auf einem voreinstellbaren Niveau möglichst konstant zu halten. Dies ist erforderlich, um die Dichtheit der Verbrennungskraftmaschine gegen Austritt von Motoröl nach außen hin zu gewährleisten.Internal combustion engines typically include a crankcase breather equipped with a pressure control valve. The pressure regulating valve comprises a deformable membrane of an elastomeric material. The pressure control valve serves as a vent valve and has the task of keeping the internal pressure in the crankcase as constant as possible at a presettable level. This is necessary to ensure the tightness of the internal combustion engine against leakage of engine oil to the outside.

Stand der TechnikState of the art

DE 196 42 219 A1 hat eine Ölabscheidevorrichtung in Kompaktbauweise zum Gegenstand. Diese wird insbesondere an Verbrennungskraftmaschinen von Kraftfahrzeugen eingesetzt und dient der Abscheidung von Öl aus einem Öl-Gas-Gemisch. In einem Gehäuse ist ein Ölabscheideelement angeordnet, welches als eine mindestens eine, vorzugsweise mehrere Umgänge aufweisende Wendel ausgebildet ist. Die die Umgänge aufweisende Wendel umfaßt zusätzliche Strukturen zur Ölabscheidung, wobei die Wendel einen Zentralraum umschließt. Die zusätzlichen Strukturen sind als Strömungsrippen ausgebildet.DE 196 42 219 A1 has a Ölabscheidevorrichtung in compact design for the subject. This is used in particular in internal combustion engines of motor vehicles and serves for the separation of oil from an oil-gas mixture. In a housing, a Ölabscheideelement is arranged, which is designed as a at least one, preferably a plurality of passages having helix. The helix having the passages comprises additional structures for oil separation, the helix enclosing a central space. The additional structures are designed as flow ribs.

DE 100 08 227 A1 hat eine Vorrichtung mit einer Membrananordnung zum Gegenstand. Es sind ein erstes Halteelement und ein zweites Halteelement vorgesehen, die über eine Bördelverbindung miteinander verbunden sind. Die Membrananordnung ist im Bereich der Bördelverbindung in ihrem Umfangsbereich zwischen dem ersten Halteelement und dem zweiten Halteelement eingespannt, wobei das erste Halteelement einen im wesentlichen parallel zur Membrananordnung verlaufenden Flansch aufweist, der mit einer umlaufenden Endfläche endet. Das zweite Halteelement hat einen im wesentlichen parallel zur Membrananordnung verlaufenden Gegenflansch und einen Bördelüberschlag. Die Bördelverbindung wird dadurch gebildet, daß der Bördelüberschlag über den Umfangsbereich der Membrananordnung und über die umlaufende Endfläche des ersten Halteelementes gebogen ist. Der Umfangsbereich der Membrananordnung überragt die Endfläche des ersten Halteelementes in radialer Richtung mit einem überstehenden Bereich. In einem an die Endfläche des ersten Halteelementes sowie an den überstehenden Bereich der Membrananordnung und an den Bördelüberschlag des zweiten Halteelementes angrenzenden Pressraum ist die Membran aus Elastomerwerkstoff eingespannt.DE 100 08 227 A1 has a device with a membrane arrangement for the subject. There are provided a first holding element and a second holding element, which are connected to one another via a flared connection. The membrane assembly is clamped in the region of the flare connection in its peripheral region between the first holding element and the second holding element, wherein the first holding element has a flange extending substantially parallel to the membrane arrangement, which ends with a circumferential end face. The second retaining element has a substantially parallel to the membrane assembly extending flange and a crimp ring. The crimp connection is formed by the crimping over the peripheral portion of the membrane assembly and is bent over the circumferential end surface of the first holding element. The peripheral region of the membrane arrangement projects beyond the end face of the first retaining element in the radial direction with a projecting region. In an adjacent to the end surface of the first holding element and to the projecting portion of the membrane assembly and the crimping of the second holding element pressing space, the membrane is clamped elastomeric material.

DE 197 00 733 A1 bezieht sich auf eine Kurbelgehäuse-Entlüftung mit integrierten Zusatzfunktionen. In der Zylinderkopfhaube für eine ein Kurbelgehäuse und einen Zylinderkopf aufweisende Verbrennungskraftmaschine, insbesondere für Kraftfahrzeuge, sind Vorrichtungen zum Abscheiden von Öl integriert. Zusätzlich ist in die Zylinderkopfhaube eine Vorrichtung zum Regulieren des im Kurbelgehäuse herrschenden Druckes eingelassen. Es sind ein Wendeleinsatz zum Abscheiden von Öl sowie ein Feinabscheider, der Vliese, Drahtgestricke, Drahtwolle, Garn oder Granulate enthält, vorgesehen. Die Zylinderkopfhaube umfaßt weiterhin eine Vorrichtung zur Regulierung des Druckes innerhalb des Kurbelgehäuses, die einen Membranträger, eine elastische Membran, eine Membrandichtung und eine Dichtstruktur aufweist.DE 197 00 733 A1 relates to a crankcase ventilation with integrated additional functions. In the cylinder head cover for a crankcase and a cylinder head having internal combustion engine, especially for motor vehicles, devices for separating oil are integrated. In addition, a device for regulating the pressure prevailing in the crankcase is embedded in the cylinder head cover. There are provided a coil insert for separating oil and a fine separator containing nonwovens, wire mesh, wire wool, yarn or granules. The cylinder head cover further comprises a device for regulating the pressure inside the crankcase, which has a membrane carrier, an elastic membrane, a membrane seal and a sealing structure.

Gemäß den skizzierten Lösungen des Standes der Technik werden Membrane an den Druckregel-/Gehäuseentlüftungsventilen eingesetzt, die als Elastomermembrane ausgebildet sind. Der Nachteil dieses Werkstoffes ist die starke Abhängigkeit seiner Verformbarkeit von der Temperatur. Bei unter den Gefrierpunkt fallenden Temperaturen verhärtet das Elastomer der Membran. Dies beeinträchtigt die Funktion des Druckregel-/Gehäuseentlüftungsventils erheblich. Ein weiterer Nachteil bei Elastomermembranen ist darin zu erblicken, daß die Motorenöl- und Kraftstoffhersteller häufig die Additivpakete von Motoröl und Kraftstoff ändern, so daß die chemischen Eigenschaften der jeweils zugesetzten Additivpakete auf den Elastomerwerkstoff nicht mehr mit Sicherheit vorherzusagen und abzuschätzen sind.According to the outlined prior art solutions, diaphragms are used on the pressure regulator / housing bleed valves which are formed as elastomeric membranes. The disadvantage of this material is the strong dependence of its deformability on the temperature. At temperatures below freezing, the elastomer hardens the membrane. This significantly affects the function of the pressure regulator / housing bleed valve. Another disadvantage of elastomeric membranes is the fact that the motor oil and fuel manufacturers often change the additive packages of engine oil and fuel, so that the chemical properties of each additive packages added to the elastomeric material can no longer be reliably predicted and estimated.

DE 197 46 763 A1 bezieht sich auf ein membrangesteuertes Druckventil, insbesondere zur Kraftstoffdruckregelung für Verbrennungskraftmaschinen mit Kraftstoffeinspritzung. Das Druckregelventil weist ein aus einem Oberteil und einem Unterteil bestehendes Gehäuse mit einem eine Bohrung umfassenden Ventilsitz, einen darin anlegbaren Ventilverschluss, eine im Gehäuse angeordnete, einen Druckraum und einen Minderdruckraum begrenzende elastische Regelmembran, die zwischen einem minderdruckseitigen Membranteller und einem druckseitigen Membranteller angeordnet ist, eine sich am Membranteller und im inneren des Gehäuseoberteils abstützende Regeldruckfeder und einen am Gehäuseoberteil angeordneten Rohrstutzen auf. Die elastische Regelmembran ist als mittenlochlose thermoplastische Membran ausgebildet und ohne Durchgangsverbindung mit dem druckseitigen Membranteller und dem minderdruckseitigen Membranteller anliegend verbunden.DE 197 46 763 A1 relates to a diaphragm-controlled pressure valve, in particular for fuel pressure control for internal combustion engines with fuel injection. The pressure regulating valve has an upper part and a lower housing existing housing with a bore valve seat, an insertable therein valve closure, arranged in the housing, a pressure chamber and a reduced pressure space limiting elastic control diaphragm which is disposed between a lower-pressure side diaphragm plate and a pressure-side diaphragm plate, a control pressure spring resting on the diaphragm plate and inside the housing upper part and one on the upper part of the housing arranged pipe socket. The elastic control membrane is designed as a hole punchless thermoplastic membrane and connected without passage connection with the pressure-side diaphragm plate and the low-pressure side diaphragm plate.

Darstellung der ErfindungPresentation of the invention

Der erfindungsgemäßen Lösung folgend wird als Membrane des Druckregel-/Gehäuseentlüftungsventils eine Membrane aus möglichst dünnwandigem gespritzten thermoplastischen Material eingesetzt. Die Wandstärke dieses thermoplastischen Membranelements liegt zwischen 0,3 bis 0,6 mm. Damit kann der Einsatz einer Elastomermembran umgangen werden, wodurch die Abhängigkeit der Verformbarkeit der Membrane von der Temperatur entfällt. Das thermoplastische Material weist ferner eine wesentlich höhere chemische Beständigkeit gegenüber den dem Motorenöl oder den dem Kraftstoff zugesetzten Additivgruppen auf. Der Einsatz einer Thermoplast-Membran gestattet ferner den Verzicht auf eine Vorspannfeder sowie ein Ventildeckelgehäuse, an dem sich die Vorspannfeder abstützt. Diese werden bei den bisherigen Ausführungen von Druckregel-/Gehäuseentlüftungsventilen eingesetzt, um die Verformbarkeit bzw. Vorspannung der Membrane aus Elastomerwerkstoff zu gewährleisten und können bei der erfindungsgemäßen Ausführung des Druckregel-/Gehäuseentlüftungsventils mit einer Membran aus thermoplastischem Material dünner Wandstärke zukünftig entfallen. Dies bedeutet eine kostengünstigere Herstellbarkeit des Druckregel-/Gehäuseentlüftungsventils und einen einfacheren Aufbau dieser Baukomponente.Following the solution according to the invention is used as a diaphragm of the pressure regulating / housing ventilation valve, a membrane of thin-walled as possible sprayed thermoplastic material. The wall thickness of this thermoplastic membrane element is between 0.3 to 0.6 mm. Thus, the use of an elastomeric membrane can be circumvented, whereby the dependence of the deformability of the membrane of the temperature is eliminated. The thermoplastic material also has a substantially higher chemical resistance to the engine oil or additive groups added to the fuel. The use of a thermoplastic membrane also allows the waiver of a biasing spring and a valve cover housing, on which the biasing spring is supported. These are used in the previous versions of pressure control / housing ventilation valves to ensure the deformability or bias of the diaphragm made of elastomeric material and can be omitted in the inventive design of the pressure control / housing ventilation valve with a membrane of thermoplastic material thin wall thickness future. This means a more cost-effective manufacturability of the pressure control / housing ventilation valve and a simpler structure of this component.

Zur Vorspannung der Membran dient bei der vorliegenden Erfindung ein Biegeelement.For biasing the membrane is used in the present invention, a bending element.

Die Membran aus thermoplastischem Material kann in wellenförmiger Struktur ausgebildet sein, was den Vorteil hat, dass keine Zugspannungen an der Einspannstelle der dünnwandigen Membran entstehen und nur Biegespannungen auftreten, die durch das Membranmaterial selbst aufgenommen werden. Ferner kann die Membran in gestufter Form ausgebildet werden. Die Membrane aus thermoplastischem Material kann durch Fügeverfahren, wie zum Beispiel Ultraschallschweißen oder Reibschweißen oder auch durch Verklebung am Gehäuse des Druckregel-/Gehäuseentlüftungsventils befestigt werden. Dies erlaubt es, die thermoplastische Membran ohne zusätzlichen Aufwand und Teilebereitstellung zur endfunktionierenden Einheit am Gehäuse zu komplettieren.The membrane of thermoplastic material may be formed in a wavy structure, which has the advantage that no tensile stresses at the clamping point of the thin-walled membrane arise and only bending stresses occur, which are absorbed by the membrane material itself. Furthermore, the membrane can be formed in a stepped form. The membrane made of thermoplastic material can be attached by joining methods, such as ultrasonic welding or friction welding or by gluing to the housing of the pressure regulating / housing ventilation valve. This makes it possible to complete the thermoplastic membrane without additional effort and parts supply to the end-functional unit on the housing.

Anstelle einer Vorspannfeder kann nunmehr ein einfach zu montierender Biegebalken, der die dünnwandige Membran aus thermoplastischem Material beaufschlagt, eingesetzt werden, der auf einfache Weise in das Gehäuse des Druckregel-/Gehäuseentlüftungsventils eingesetzt werden kann.Instead of a biasing spring can now be an easy-to-install bending beam, which acts on the thin-walled membrane made of thermoplastic material, can be used, which can be easily inserted into the housing of the pressure control / housing ventilation valve.

Zeichnungdrawing

Anhand der Zeichnung wird die Erfindung nachstehend eingehender beschrieben.With reference to the drawing, the invention will be described below in more detail.

Es zeigt:

Figur 1
die perspektivische Ansicht einer in die Zylinderkopfhaube integrierten Kurbelbehäuseentlüftungen mit Abscheidekomponenten,
Figur 2
die Hintereinanderschaltung der Funktionsgruppen Labyrinth, Zyklon, Feinabscheider und Druckregel-/Gehäuseentlüftungsventil,
Figur 3
die schematische Wiedergabe eines Druckregel-/Gehäuseentlüftungsventils mit Elastomermembran gemäß des Standes der Technik,
Figur 4, 4.1
eine Ausführungsvariante einer dünnwandigen Thermoplastmembran in gewellter Form,
Figur 5, 5.1
eine weitere Ausführungsvanante einer dünnwandigen Membran aus thermoplastischem Material in gestufter Ausführung und
Detail X
Montagevarianten eines in das Gehäuse des Druckregel-/Gehäuseentlüftungsventils eingeklipsten Biegebalkens.
It shows:
FIG. 1
the perspective view of integrated in the cylinder head cover crankcase vents with Abscheidekomponenten,
FIG. 2
the series connection of the functional groups labyrinth, cyclone, fine separator and pressure regulator / housing ventilation valve,
FIG. 3
the schematic representation of a pressure control / housing venting valve with elastomeric membrane according to the prior art,
FIG. 4, 4.1
a variant of a thin-walled thermoplastic membrane in corrugated form,
FIG. 5, 5.1
Another Ausführungsvanante a thin-walled membrane of thermoplastic material in a stepped design and
Detail X
Mounting variants of a bending beam clipped into the housing of the pressure control / housing ventilation valve.

Ausführungsvariantenvariants

Figur 1 gibt die perspektivische Ansicht einer in die Zylinderkopfhaube integrierten Kurbelgehäuseentlüftung mit hintereinander geschalteten Abscheidekomponenten wieder.FIG. 1 shows the perspective view of a crankcase breather integrated in the cylinder head cover with separator components connected in series.

In eine Zylinderkopfhaube 1 an einer Verbrennungskraftmaschine sind hintereinander geschaltete Komponenten zur Kurbelgehäuseentlüftung integriert. Die Zylinderkopfhaube 1 wird mittels Befestigungsdurchbrüchen 2, die von Schrauben durchsetzt werden, lösbar im Zylinderkopfbereich einer Verbrennungskraftmaschine angebracht und kann von diesem leicht demontiert werden. Im Hohlraum 4 der Zylinderkopfhaube 1 sind Abscheidekomponenten zur Abscheidung von Tröpfchen bzw. Aerosolen aus einem Öl/Gasgemisch enthalten. Es ist ein Vorabscheider 5, der ein Labyrinth 6 aufweist, vorgesehen, in welchen die eintretende Öl/Gas-Strömung einströmt und in dem durch einzelne Rippen 7 gebildeten Labyrinth 6 mehrfach umgelenkt wird. An den Vorabscheider 5 der Abscheidekomponenten schließt sich ein Zyklon 8 an, der eine in der Darstellung gemäß Figur 1 in vertikaler Erstreckung eingebaute Wendel 9 enthält. Die Wendel 9 umfaßt einen oder bevorzugt mehrere Umgänge 10, die von der den Vorabscheider 5 verlassenden Öl/Gasströmung in vertikaler Richtung von oben nach unten durchströmt werden. Beim Durchströmen der Zyklone 8 setzen sich an den Umgängen bzw. an den die Wendel 9 umgebenden Gehäuseinnenseiten der Zyklone 8 einzelne Tröpfchen ab, die dem in eine Überströmöffnung 11 zu einem Feinabscheider 12 überströmenden Öl/Gasgemisch entzogen sind. Im Feinabscheider 12 kann ein ringförmig konfigurierter Garnwickel, ein Vlies, ein Gestrick, ein Drahtgewirr oder ein textiler Überzug vorgesehen sein, mit dem Aerosole aus dem die Zyklone 8 verlassenden und über die Überströmung 11 in den Feinabscheider 12 einströmende Öl/Gasgemische entzogen werden. Im Feinabscheider gereinigt strömt das Öl/Gasgemisch über einen Kanal 14 in ein Druckregel-/Gehäuseentlüftungsventil 15 ein. Dieses umfaßt ein Deckelelement 16, welches eine in ein Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventils 15 eingelassene verformbare Membran 17 abdeckt.In a cylinder head cover 1 on an internal combustion engine connected in series components for crankcase ventilation are integrated. The cylinder head cover 1 is detachably mounted in the cylinder head region of an internal combustion engine by means of fastening apertures 2, which are penetrated by screws, and can be easily disassembled therefrom. In the cavity 4 of the cylinder head cover 1 separation components for the separation of droplets or aerosols from an oil / gas mixture are included. It is a pre-separator 5, which has a labyrinth 6, provided, in which the incoming oil / gas flow flows in and is deflected several times in the labyrinth 6 formed by individual ribs. A cyclone 8, which contains a helix 9 built into the vertical extent in the illustration according to FIG. 1, adjoins the preseparator 5 of the separation components. The coil 9 comprises one or preferably a plurality of passages 10, which are flowed through from the top of the pre-separator 5 oil / gas flow in the vertical direction from top to bottom. When flowing through the cyclones 8 settle at the passages or at the surrounding the helix 9 inside the housing of the cyclones 8 individual droplets, which in an overflow opening 11 to a Fine separator 12 overflowing oil / gas mixture are withdrawn. In fine separator 12 may be provided a ring-shaped yarn package, a nonwoven fabric, a knit, a wire tangle or a textile coating are withdrawn with the aerosols from the cyclone 8 leaving and flowing over the overflow 11 in the fine separator 12 oil / gas mixtures. Purified in the fine separator, the oil / gas mixture flows via a channel 14 into a pressure regulating / housing ventilation valve 15. This comprises a cover element 16 which covers a deformable membrane 17 embedded in a housing 18 of the pressure regulating / housing ventilation valve 15.

Figur 2 zeigt die Strömung des Öl/Gasgemisches durch die zur Ölabscheidung hintereinander geschalteten Komponenten im Hohlraum einer Zylinderkopfhaube.FIG. 2 shows the flow of the oil / gas mixture through the components connected one behind the other in the cavity of a cylinder head cover for oil separation.

Die dickeren Pfeile deuten die die Abscheidekomponenten 5, 8, 12 bzw. 15 durchströmende Öl/Gasgemischströmung an, welche die hintereinander geschalteten Komponenten zur Ölabscheidung 5, 8, 12 und 15 kontinuierlich durchströmt und bei der Passage der hintereinander geschalteten Abscheidekomponenten 5, 8, 12 bzw. 15 eine Reinigung bzw. Entfernung von Öltröpfchen bzw. feingelösten Aerosolen erfährt.The thicker arrows indicate the oil / gas mixture flow flowing through the separation components 5, 8, 12 and 15, respectively, which continuously flows through the components for oil separation 5, 8, 12 and 15 which are connected one behind the other and during the passage of the separation components 5, 8, 12 connected in series or 15 a cleaning or removal of oil droplets or finely dissolved aerosols experiences.

Innerhalb des Vorabscheiders 5 wird die eintretende Öl-/Gasgemischströmung über ein Labyrinth 6 bildende Rippen 7 mehrfach umgelenkt, bevor die aus dem Vorabscheider 5 austretende Öl-/Gasgemischströmung in die Wendel 9 einer Zyklone 8 eintritt, wobei die Wendel 9 vorzugsweise mit mehreren Umgängen 10 ausgestattet ist. Am unteren Ende der Zyklone 8 verläßt die Öl-/Gasgemischströmung die Zyklone und tritt in einen Vorabscheider 12 ein, an dessen unteren Ende ein Auslaß in ein Schmiermittelreservoir oder die Kurbelwanne einer Verbrennungskraftmaschine angedeutet ist. Am oberen Ende des Feinabscheider 12 strömt das Öl-/Gasgemisch in eine Kanal 14 ein, der in ein Druckregelventil 15 mündet, welches gemäß den bekannten Ausbildungen aus dem Stand der Technik mit einem Deckelelement 16 versehen ist, in welchem ein Membranelement 17, in der Regel aus einem Elastomermaterial gefertigt, eingespannt ist. Das Membranelement 17 aus Elastomermaterial kann im Gehäuse 18 auch unmittelbar eingespannt sein.Within the pre-separator 5, the incoming oil / gas mixture flow over a labyrinth 6 forming ribs 7 is deflected several times before the emerging from the pre-separator 5 oil / gas mixture flow enters the coil 9 of a cyclone 8, wherein the coil 9 preferably with multiple passages 10th Is provided. At the lower end of the cyclone 8, the oil / gas mixture flow leaves the cyclones and enters a pre-separator 12, at the lower end of an outlet in a lubricant reservoir or the crankcase of an internal combustion engine is indicated. At the upper end of the fine separator 12, the oil / gas mixture flows into a channel 14, which opens into a pressure control valve 15, which is provided according to the known embodiments of the prior art with a cover member 16 in which a membrane element 17, in the Usually made of an elastomeric material, is clamped. The membrane element 17 made of elastomeric material can also be clamped directly in the housing 18.

Figur 3 zeigt die schematische Wiedergabe eines Druckregel-/Gehäuseentlüftungsventils mit Elastomermembran gemäß des Standes der Technik.Figure 3 shows the schematic representation of a pressure control / housing venting valve with elastomeric membrane according to the prior art.

Das Membranelement 17 gemäß der Darstellung in Figur 3 besteht aus einem Elastomermaterial, welches über den in Figur 1 mit Position 16 bezeichneten Deckel am Gehäuse 18 eingespannt wird. An ihrem unteren Ende ist zwischen einer Planfläche des Gehäuses 18 und einer Vertiefung im Membranelement 17 ein Regelspalt 19 von etwa 1 mm angedeutet.The membrane element 17 according to the illustration in FIG. 3 consists of an elastomeric material which is clamped to the housing 18 via the cover designated by position 16 in FIG. At its lower end, a control gap 19 of approximately 1 mm is indicated between a plane surface of the housing 18 and a depression in the membrane element 17.

Das Membranelement 17 wird durch eine teuer und aufwendig herzustellende Druckfeder 20 beaufschlagt und ist in Richtung des mit Bezugszeichen 23 bezeichneten Doppelpfeiles in vertikale Richtung bewegbar. Die das Membranelement 17 beaufschlagende eintretende Gasströmung ist durch Bezugszeichen 21 markiert und passiert eine in der Planfläche des Gehäuses 18 ausgebildete Eintrittsöffnung 22. Das in Figur 3 dargestellte Membranelement 17, welches aus einem Elastomermaterial gefertigt ist, oszilliert in einem Bereich zwischen 0 und 1 mm je nach Größe des Regelspaltes 19. Bei tiefen Außentemperaturen, wie sie sich beispielsweise in kalten Winternächten einstellen, ist die Oszillation des den Regelspalt 19 begrenzenden Bereiches der Membran 17 aus Elastomermaterial nicht in ausreichendem Maße gewährleistet.The membrane element 17 is acted upon by a costly and expensive to manufacture compression spring 20 and is movable in the direction of the designated by reference numeral 23 double arrow in the vertical direction. The incoming gas flow acting on the membrane element 17 is marked by reference numeral 21 and passes through an entry opening 22 formed in the plane surface of the housing 18. The membrane element 17 shown in FIG. 3, which is made of an elastomeric material, oscillates in a range between 0 and 1 mm each according to the size of the control gap 19. At low outside temperatures, as set, for example, in cold winter nights, the oscillation of the control gap 19 limiting range of the membrane 17 is made of elastomeric material is not sufficiently guaranteed.

Die Figuren 4 und 4.1 zeigen eine erste Ausführungsvariante einer Membran für ein Druckregel-/Gehäuseentlüftungsventil aus einem thermoplastischen Material mit einem gewellt ausgebildeten Deformationsbereich.Figures 4 and 4.1 show a first embodiment of a membrane for a pressure control / housing ventilation valve made of a thermoplastic material having a wavy formed deformation region.

Die in Figur 4 im Querschnitt dargestellte Befestigungsstelle 25, mit dem Gehäuse 18 verbundene Membran 24 ist gewellt ausgebildet. Die Wellenform ist mit Bezugszeichen 38 bezeichnet und erstreckt sich vom Zentrum der Membran 24, welches durch einen angespritzten Stift 32 sowie einen in dieser Ausführungsvariante angespritzten Fuß 26 gebildet ist, in radialer Richtung zum Umfang 35 der Membran 24 aus thermoplastischem Material. In der ersten Ausführungsvariante der Membran 24 aus thermoplastischem Material kann durch die Wellenform der Membran 24 das Auftreten von unzulässig hohen Zugspannungen vermieden werden, es treten vielmehr nur Biegespannungen auf. Durch ein oberhalb der Membran 24 aus thermoplastischem Material in Wellenform angeordnetes Biegeelement 28, zum Beispiel ausgebildet in Gestalt eines Biegebalkens, wird die Membran 24 aus thermoplastischem Material vorgespannt. Die Stirnseite des an die Membran 24 aus thermoplastischem Material angespritzten Fußes 26 fungiert als Begrenzungsfläche eines Regelspaltes oberhalb der in Figur 3 dargestellten Öffnung 22 in der Planfläche des Gehäuses 18 des Druckregel-/Gehäuseentlüftungsventils.The fastening point 25 shown in cross-section in FIG. 4, membrane 24 connected to the housing 18 is of a corrugated design. The waveform is designated by reference numeral 38 and extends from the center of the membrane 24, which is formed by a molded-on pin 32 and a molded foot 26 in this embodiment, in the radial direction to the periphery 35 of the membrane 24 of thermoplastic material. In the first embodiment of the membrane 24 made of thermoplastic material can be avoided by the waveform of the membrane 24, the occurrence of impermissibly high tensile stresses, but only bending stresses occur. By means of a bending element 28, which is arranged above the membrane 24 of thermoplastic material in the form of a wave, for example formed in the form of a bending beam, the membrane 24 is prestressed from thermoplastic material. The end face of the molded onto the membrane 24 of thermoplastic material foot 26 acts as a boundary surface of a control gap above the opening 22 shown in Figure 3 in the flat surface of the housing 18 of the pressure control / housing ventilation valve.

Die Membran 24 aus thermoplastischem Material kann an ihren Verbindungsstellen 25 mit der Innenseite des Gehäuses 18 des Druckregel-/Gehäuseentlüftungsventils durch Ultraschallweißen oder unter Einsatz eines Reibschweißverfahrens befestigt werden. Ferner läßt sich die Umfangsfläche 35 der Membran 24 aus thermoplastischem Material in Wellenform mit dem Gehäuse 18 verkleben. Der in Figur 1 dargestellte Deckel 16, mit dem das Membranelement 17 gemäß der Ausführungsvariante des Druckregel-/Gehäuseentlüftungsventils nach dem Stand der Technik (vgl. Figur 3) bisher am Gehäuse 18 eingespannt war, kann nunmehr entfallen. Die aus thermoplastischem Material gefertigte Membran 24 kann damit ohne zusätzlichen Aufwand und Teilebereitstellung zu einer endfunktionierenden Einheit am Gehäuse 18 komplettiert werden. Mit Bezugszeichen 43 ist die Dicke des thermoplastischen Werkstoffes der Membran 24 mit gewellt ausgeführtem Deformationsbereich markiert, wobei die Wandstärke 43 (s) im Bereich zwischen 0,3 und 0,6 mm liegt.The membrane 24 of thermoplastic material may be secured at its junctions 25 to the inside of the housing 18 of the pressure regulating / housing venting valve by ultrasonic whitening or by use of a friction welding process. Further, the peripheral surface 35 of the membrane 24 of thermoplastic material can be bonded in waveform to the housing 18. The cover 16 shown in FIG. 1, with which the membrane element 17 according to the embodiment variant of the prior art pressure regulating / housing ventilation valve (see FIG. 3) has hitherto been clamped on the housing 18, can now be dispensed with. The membrane made of thermoplastic material 24 can thus be completed without additional effort and parts supply to a final functional unit on the housing 18. Reference numeral 43 denotes the thickness of the thermoplastic material of the membrane 24 with a wavy deformation area, the wall thickness 43 (s) being in the range between 0.3 and 0.6 mm.

Das in der Darstellung gemäß Figur 4 mit Bezugszeichen 28 bezeichnete Biegeelement kann an seinen Einspannstellen 29 am Gehäuse 18 einfach eingeklipst werden. Dazu können am Gehäuse 18 gemäß der Darstellung im Detail X Öffnungen 30 bzw. 31 ausgeführt sein. Die Öffnungen 30 bzw. 31 können sich sowohl in vertikale Richtung (vgl. Orientierung der Öffnung 30) als auch in horizontale Richtung (vgl. Orientierung der Öffnungen 31 im Gehäuse 18) erstrecken. In diese im Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventil eingebrachten Öffnungen läßt sich ein Biegeelement 28 in Form eines Biegebalkens mit rundem Querschnitt einfach einklipsen. Dies gestattet sowohl eine einfache Montage wie auch eine einfache Demontage. Anstelle eines kreisförmigen Querschnittes kann das Biegeelement auch in einem anderen Querschnitt, beispielsweise oval oder halbrund ausgebildet werden.The bending element designated by reference numeral 28 in the illustration according to FIG. 4 can simply be clipped into place at its clamping points 29 on the housing 18. For this purpose, openings 30 and 31 can be made on the housing 18 as shown in detail in FIG. The openings 30 and 31 can extend both in the vertical direction (cf., orientation of the opening 30) and in the horizontal direction (cf., orientation of the openings 31 in the housing 18). In this introduced in the housing 18 of the pressure control / housing ventilation valve openings, a bending element 28 in the form of a bending beam with a round cross section can be easily clipped. This allows both a simple installation as well as a simple disassembly. Instead of a circular cross section, the bending element can also be formed in another cross section, for example oval or semicircular.

Der Darstellung gemäß Figur 4.1 ist die Draufsicht auf eine Membran 24 aus thermoplastischem Material mit wellenförmig konfiguriertem Deformationsbereich 38 zu entnehmen.The illustration according to FIG. 4.1 shows the plan view of a membrane 24 made of thermoplastic material with a wave-shaped deformation region 38.

In der Membranfläche 34 der Membran 24 mit gewellt ausgebildetem Deformationsbereich erstrecken sich vom durch den Stift 32 gebildeten Zentrum zur Umfangsfläche 35 Wellen, die Täler sowie Erhebungen aufweisen. Durch einen solcherart in der Membranfläche 34 ausgebildeten Deformationsbereich lassen sich Biegespannungen, die die Membranfläche 34 der Membran 24 belasten, aufnehmen, ohne daß die in einer Wandstärke 43 zwischen 0,3 bis 0,6 mm ausgebildete Membran 24 aus thermoplastischem Material Schaden nimmt. Der Biegebalken 28 erstreckt sich über die freie Fläche der Membranfläche 34 innerhalb des Gehäuses 18. Entlang der Umfangsfläche 35 ist die Membranfläche 34 der Membran 24 aus thermoplastischem Material an Befestigungsstellen 25 mit dem Gehäuse dauerhaft verbunden. Die Länge, mit der das beispielsweise als Biegebalken ausgeführte Biegeelement 28 die Membranfläche 34 der Membran 24 überspannt, ist mit Bezugszeichen 40 gekennzeichnet. Das beispielsweise als Biegebalken ausgeführte Biegeelement 28 kann an einer Anlagefläche 33 des an der Membranfläche 34 im Zentrum angespritzten Stiftes 32 anliegen, so daß eine Auslenkung und damit ein Verlust von Vorspannung bei Druckbeaufschlagung der Membranfläche 34 der Membran 24 unterbleibt.In the membrane surface 34 of the membrane 24 with a corrugated trained deformation range extending from the center formed by the pin 32 to the peripheral surface 35 waves, the valleys and elevations. By means of such a deformation area formed in the membrane surface 34, bending stresses which load the membrane surface 34 of the membrane 24 can be absorbed without damaging the membrane 24 of thermoplastic material formed in a wall thickness 43 between 0.3 and 0.6 mm. The bending beam 28 extends over the free surface of the membrane surface 34 within the housing 18. Along the peripheral surface 35, the membrane surface 34 of the membrane 24 made of thermoplastic material at attachment points 25 to the housing permanently connected. The length with which the bending element 28 embodied as a bending beam, for example, spans the membrane surface 34 of the membrane 24 is designated by reference numeral 40. The bending element 28, which is designed, for example, as a bending beam, can abut against a contact surface 33 of the pin 32 molded onto the diaphragm surface 34 in the center, so that a deflection and thus a loss of prestressing when the membrane surface 34 of the diaphragm 24 is pressurized are omitted.

Den Darstellungen gemäß der Figuren 5 und 5.1 ist eine weitere Ausführungsvariante einer dünnwandigen, aus einem thermoplastischem Material gefertigten Membran zu entnehmen.The illustrations according to FIGS. 5 and 5.1 show a further embodiment variant of a thin-walled membrane made of a thermoplastic material.

Im Unterschied zur in Figur 4 dargestellten ersten Ausführungsvariante einer Membran 24 aus thermoplastischem Material kann gemäß einer zweiten Ausführungsvariante die Membran auch in Stufenform als gestufte Membram 27 ausgebildet sein. Analog zur mit wellenförmigem Deformationsbereich 38 versehen Membran 24 aus thermoplastischem Material gemäß der Darstellung in Figur 4, kann die gestuft ausgebildete Membran 27 aus thermoplastischem Material gefertigt, an Einspannstellen 25 mit der Innenseite des Gehäuses 18 des Druckregel-/Gehäuseentlüftungsventils verbunden sein. Auch diese Befestigungsstellen 25 zwischen einer in Stufenform ausgebildeten Membran 27 aus thermoplastischem Material mit dem Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventils können auf dem Wege der Verklebung, des Ultraschallschweißens oder durch Einsatz des Reibschweißverfahrens erzeugt werden. Im Unterschied zur Ausbildung des Deformationsbereiches 38 der Membran 24 aus thermoplastischem Material in Wellenform enthält die Ausführungsvariante der Membran 27 in Stufenform eine Abfolge ringförmig verlaufender, unterschiedlich tiefer Stufen. Diese Ausführungsvariante der Membran 27 aus thermoplastischem Material stellt sicher, daß in der Membran 27 bei Druckbeaufschlagung durch das einströmende Gas 21 (vgl. Darstellung gemäß Figur 3) Zugspannungen vermieden werden und lediglich Biegespannungen auftreten. Auch die in Figur 5 im Querschnitt dargestellte, in Stufenform ausgebildete Membran 27 ist in einer Wandstärke 43 (s) im Bereich zwischen 0,3 und 0,6 mm ausgebildet. Analog zur ersten Ausführungsvariante gemäß Figur 4 ist auch die in Figur 5 im Querschnitt dargestellte Membran 27 in Stufenform durch ein in das Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventils beispielsweise eingeklipstes Biegeelement 28 beaufschlagt. Das Biegeelement 28 ist an seinen Montagestellen 41 bzw. 42 in Öffnungen 30 bzw. 31 (vgl. Darstellung gemäß Detail X) des Gehäuses 18 eingeklipst. Diese Öffnungen können, wie vorstehend bereits beschrieben, entweder in vertikale Richtung oder auch in horizontale Richtung orientiert sein. Das Biegeelement 28, welches von den Öffnungen 30 bzw. 31 aufgenommen ist, kann sowohl in kreisförmigem, als auch in ovalem Querschnitt ausgebildet sein, so daß sich dessen leichte Montage bzw. Demontage ohne Einsatz zusätzlicher Werkzeuge vornehmen läßt.In contrast to the first variant of a membrane 24 made of thermoplastic material shown in FIG. 4, according to a second embodiment variant, the membrane can also be configured in stepped form as a stepped membrane 27. Analogous to the membrane 24 provided with wavy deformation region 38 of thermoplastic material as shown in Figure 4, the stepped diaphragm 27 may be made of thermoplastic material, be connected to clamping points 25 with the inside of the housing 18 of the pressure control / housing ventilation valve. These fastening points 25 between a formed in stepped form diaphragm 27 made of thermoplastic material with the housing 18 of the pressure control / housing ventilation valve can be generated by way of bonding, ultrasonic welding or by using the friction welding process. In contrast to the formation of the deformation region 38 of the membrane 24 made of thermoplastic material in waveform contains the embodiment of the membrane 27 in a stepped form a sequence of annularly extending, different levels deeper. This embodiment variant of the membrane 27 made of thermoplastic material ensures that tensile stresses are avoided in the membrane 27 when pressure is applied by the inflowing gas 21 (see illustration according to FIG. 3) and that only bending stresses occur. Also shown in Figure 5 in cross-section, formed in step shape membrane 27 is formed in a wall thickness 43 (s) in the range between 0.3 and 0.6 mm. Analogously to the first embodiment variant according to FIG. 4, the membrane 27 shown in cross-section in FIG. 5 is also acted upon in stepped fashion by a bending element 28 clipped into the housing 18 of the pressure regulating / housing ventilation valve, for example. The bending element 28 is clipped into its openings 41 and 42 in openings 30 and 31 (see illustration according to detail X) of the housing 18. As already described above, these openings can be oriented either in the vertical direction or in the horizontal direction. The bending element 28, which is received by the openings 30 and 31, may be formed both in a circular, as well as in an oval cross-section, so that it can be easy to assemble and disassemble without the use of additional tools.

Der Darstellung der weiteren Ausführungsvariante eines Membranelementes 27 aus thermoplastischem Material gemäß Figur 5 ist darüber hinaus zu entnehmen, daß ein Membranboden 37 sich ringförmig erstreckt und einen Regelspalt 19 (vgl. Darstellung gemäß Figur 3) begrenzt.The illustration of the further embodiment variant of a membrane element 27 made of thermoplastic material according to FIG. 5 also shows that a membrane bottom 37 extends annularly and delimits a control gap 19 (see illustration according to FIG.

Vom Membranboden 37 ringförmig umgeben ist an der Membran 27 aus thermoplastischem Material gemäß der Ausführungsvariante in Figur 5 ein Plateau 39 begrenzt. Das in Spritzgußtechnik gefertigte, in Stufenform ausgebildete Membranelement 27 umfaßt einen am Membranplateau 39 angespritzten Stift 32, der eine Anlagefläche 33 für das die Membran 27 aus thermoplastischem Material überspannende Biegeelement 28 (vgl. Darstellung gemäß Figur 5.1) darstellt.Surrounded annularly by the membrane bottom 37, a plateau 39 is delimited on the membrane 27 made of thermoplastic material according to the embodiment in FIG. The injection-molded, step-shaped membrane element 27 comprises a pin 32 injection-molded on the membrane plateau 39, which constitutes a contact surface 33 for the bending element 28 spanning the membrane 27 of thermoplastic material (see illustration according to FIG.

Die Ausführung der Membran 27 in Stufenform gestattet es in vorteilhafter Weise, den Stift 32, der sich im wesentlichem im Zentrum der Membranfläche 34 der Membran 27 in Stufenform befindet, direkt an das Membranplateau 39 anzuspritzen. Ferner ist mit dem Spritzgießverfahren die dünne Wandstärke 43 im Bereich zwischen 0,3 und 0,6 mm problemlos erzeugbar; darüber hinaus bietet das Spritzgießherstellungsverfahren der Membranen aus thermoplastischem Material, sei es in gewellter Form gemäß Figur 4, sei es in gestufter Form gemäß Figur 5 den Vorteil, die den Regelspalt 19 begrenzende Stirnfläche am Fuß 26 bzw. dem Membranboden 37 unmittelbar bei der Herstellung des Bauteils zu erzeugen, ohne daß eine Nachbearbeitung erforderlich ist.The embodiment of the membrane 27 in a stepped shape advantageously allows the pin 32, which is substantially in the center of the membrane surface 34 of the membrane 27 in stepped form, to be directly injected onto the membrane plateau 39. Furthermore, the thin wall thickness 43 in the range between 0.3 and 0.6 mm can be generated easily with the injection molding process; Moreover, the Spritzgießherstellungsverfahren of the membranes of thermoplastic material, be it in corrugated form of Figure 4, or in a stepped form according to Figure 5 has the advantage that the control gap 19 delimiting end face on the foot 26 and the diaphragm bottom 37 directly in the production of To produce component without post-processing is required.

Der Draufsicht auf die Membran 27 aus thermoplastischem Material in Stufenform gemäß Figur 5.1 ist zu entnehmen, daß sich vom durch den Stift 32 gebildeten Zentrum der Membranfläche 34 die Stufenformation in abnehmender Stufentiefe vom Zentrum 32 in Richtung auf die Umfangsfläche 35 in radiale Richtung erstreckt. Die Membranfläche 34 der in Stufenform ausgebildeten Membran 27 aus thermoplastischem Material wird vom Biegeelement 28, welches in einer Längenerstreckung 40 ausgebildet ist, überspannt. Das Biegeelement ist an den in Figur 5 dargestellten Montagestellen 41 bzw. 42, beispielsweise in das Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventils eingeklipst und stützt sich lediglich an der Anlagefläche 33 des im Zentrum der Membranfläche 34 vorgesehenen Stiftes 32 ab. Dadurch wird eine Auslenkung des balkenförmig konfigurierten Biegeelementes 28 in horizontale Richtung vermieden, so daß die durch das Biegeelement 28 aufgebrachte Vorspannung konstant gehalten werden kann.The top view of the membrane 27 of thermoplastic material in step shape according to Figure 5.1 it can be seen that extends from the center formed by the pin 32 of the membrane surface 34, the step formation in decreasing step depth from the center 32 in the direction of the peripheral surface 35 in the radial direction. The membrane surface 34 of the step-shaped membrane 27 made of thermoplastic material is spanned by the bending element 28, which is formed in a longitudinal extension 40. The bending element is clipped to the mounting points 41 and 42 shown in Figure 5, for example, in the housing 18 of the pressure control / housing ventilation valve and is supported only on the contact surface 33 of the provided in the center of the diaphragm surface 34 pin 32. As a result, a deflection of the bar-shaped configured bending element 28 in the horizontal direction is avoided, so that the applied by the bending element 28 bias can be kept constant.

Das in den Figuren 4, 4.1, 5 und 5.1 dargestellte, hier als Biegebalken ausgeführte Biegeelement 28 wird in das Gehäuse 18 des Druckregel-/Gehäuseentlüftungsventils 15 eingeklipst, nachdem die mit einem wellenförmigen Deformationsbereich oder mit einem gestuft ausgebildeten Deformationsbereich aus thermoplastischem Material gefertigte Membran 24 bzw. 27 an ihren Verbindungsstellen 25 mit der Innenseite des Gehäuses 18 verschweißt oder verklebt worden ist. Das Druckregel-/Gehäuseentlüftungsventil 15 gemäß den Ausführungsvarianten nach den Figuren 4 und 4.1 bzw. 5 und 5.1 sitzt an exponierter Stelle am höchsten Punkt der Zylinderkopfhaube an der Verbrennungskraftmaschine, da an dieser Position eine bestmögliche Entnahme der Kurbelgehäusegase einer Verbrennungskraftmaschine, sei es eine selbstzündende oder eine fremdgezündete Verbrennungskraftmaschine, durchgeführt werden kann. Neben dem Einsatz des erfindungsgemäß ausgestalteten Druckregel-/Gehäuseentlüftungsventils 15 an Zylinderkopfhauben 1 von Verbrennungskraftmaschinen mit Kurbelgehäuseentlüftung kann das vorgeschlagene Druckregel-/Gehäuseentlüftungsventil auch an anderen Aggregaten, zum Beispiel Anbauaggregaten zur Ölabscheidung, eingesetzt werden.The bending element 28 shown here in FIGS. 4, 4.1, 5 and 5.1 is clipped into the housing 18 of the pressure regulating / housing ventilation valve 15 after the membrane 24 made of thermoplastic material with a wave-shaped deformation area or with a stepped deformation area or 27 has been welded or glued at their connection points 25 with the inside of the housing 18. The pressure regulating / housing ventilation valve 15 according to the embodiment variants according to FIGS. 4 and 4.1 or 5 and 5.1 is seated at an exposed point at the highest point of the cylinder head cover on the internal combustion engine, since at this point Position the best possible removal of the crankcase gases of an internal combustion engine, be it a self-igniting or a spark-ignited internal combustion engine, can be performed. In addition to the use of inventively designed pressure control / housing ventilation valve 15 on cylinder head covers 1 of internal combustion engines with crankcase ventilation, the proposed pressure control / housing ventilation valve can also be used on other units, for example, cultivation units for oil separation.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
ZylinderkopfhaubeCylinder head cover
22
BefestigungsdurchbruchFixing breakthrough
33
Schraubverbindungscrew
44
Hohlraumcavity
55
Vorabscheiderpre-separator
66
Labyrinthlabyrinth
77
Rippenribs
88th
Zykloncyclone
99
Wendelspiral
1010
Umganghandling
1111
Überströmöffnungoverflow
1212
Feinabscheider (Aerosol-Abscheidung)Fine separator (aerosol deposition)
1313
Garnwickel, Vlies, Gestrick, TextilYarn wrap, fleece, knitted fabric, textile
1414
Kanalchannel
1515
Druckregel-/GehäuseentlüftungsventilPressure control / housing venting valve
1616
Deckelcover
1717
Membranelementmembrane element
1818
Gehäusecasing
1919
Regelspaltcontrol gap
2020
Druckfedercompression spring
2121
GaseintrittsströmungGas inlet flow
2222
Gehäuseöffnunghousing opening
2323
Vertikalbewegung MembranVertical movement membrane
2424
Thermoplastmembran (gewellte Ausführung)Thermoplastic membrane (corrugated version)
2525
Befestigungsstelle Membran/GehäuseAttachment point membrane / housing
2626
angespritzter Fußmolded foot
2727
Thermoplastmembran (gestufte Ausführung)Thermoplastic membrane (stepped version)
2828
Biegeelementflexure
2929
Einspannstelle BiegeelementClamp bending element
3030
vertikale Gehäuseöffnungvertical housing opening
3131
horizontale Gehäuseöffnunghorizontal housing opening
3232
angespritzter Stiftmolded pin
3333
Anlageflächecontact surface
3434
Membranflächemembrane area
3535
Umfangscope
3636
Vertiefungdeepening
3737
Membranbodendiaphragm base
3838
radiales Wellenprofilradial wave profile
3939
Membranplateaumembrane plateau
4040
Längserstreckung BiegeelementLongitudinal stretch bending element
4141
erste Montagestellefirst assembly point
4242
zweite Montagestellesecond mounting point
4343
Wandstärke (s)Wall thickness (s)

Claims (16)

  1. Pressure regulating valve/housing venting valve for internal combustion engines or add-on assemblies for depositing lubricants and/or aerosols having depositing devices (5, 8, 12) which are connected upstream of said valve, having a housing (18) into which a diaphragm (17, 24, 27) which can move in the vertical direction (23) is countersunk, said diaphragm (17, 24, 27) being held at attachment points (25) on the housing (18), characterized by a bending element (28) which engages over a diaphragm surface (34) with a pin (32) which is integrally injection-moulded on, which bending element (28) acts on the diaphragm (24, 27) by means of the pin (32).
  2. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the wall thickness (43) of the diaphragm (24, 27) is in the range between 0.3 and 0.6 mm.
  3. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the diaphragm (24) is formed from thermoplastic material in the radial direction from the centre (32) to the circumference (35) in a corrugated shape (38).
  4. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the diaphragm (27) which is made of thermoplastic material is provided with step-shaped depressions and elevations (36, 39) viewed in the radial direction.
  5. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the diaphragm (24, 27) is fabricated with a deformation region (38; 36, 39) as an injection-moulded component.
  6. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that attachment points (25) for the diaphragm (24, 27) which is made of thermoplastic material are embodied on the housing (18) as ultrasonic weld points.
  7. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that attachment points (25) of the diaphragm (24, 27) which is made of thermoplastic material are embodied on the housing (18) as friction welding points.
  8. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that attachment points (25) for the diaphragm (24, 27) which is made of thermoplastic material are formed on the housing (18) as adhesive points.
  9. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the size of a standard gap (19) can be influenced with the bending element (28).
  10. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the bending element (28) is embodied as a bending bar which can be clipped into openings (30, 31) in the housing (18).
  11. Pressure regulating valve/housing venting valve according to Claim 10, characterized in that the openings (30) in the housing (18) are embodied such that they extend in the vertical direction.
  12. Pressure regulating valve/housing venting valve according to Claim 10, characterized in that the openings (30) in the housing (18) are embodied such that they extend in the horizontal direction.
  13. Pressure regulating valve/housing venting valve according to Claim 5, characterized in that the pin (32) which is integrally injection-moulded onto the diaphragm (24, 27) comprises a bearing face (33) for a bending element (28).
  14. Pressure regulating valve/housing venting valve according to Claim 5, characterized in that the pin (32) which is integrally injection-moulded onto the diaphragm (24, 27) which is made of thermoplastic material is arranged on a diaphragm plateau (39).
  15. Pressure regulating valve/housing venting valve according to Claim 10, characterized in that the bending element (28) has a circular or oval cross-sectional face.
  16. Pressure regulating valve/housing venting valve according to Claim 1, characterized in that the diaphragm (24, 27) is propagated from a thermoplastic material with a small wall thickness (43) and a deformation area (38, 36, 39) which extends in the radial direction.
EP20020026221 2002-01-18 2002-11-26 Pressure regulating valve for a crankcase ventilating system Expired - Lifetime EP1329598B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10201823 2002-01-18
DE2002101823 DE10201823A1 (en) 2002-01-18 2002-01-18 Pressure control valve for crankcase ventilation of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1329598A1 EP1329598A1 (en) 2003-07-23
EP1329598B1 true EP1329598B1 (en) 2006-12-27

Family

ID=7712493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020026221 Expired - Lifetime EP1329598B1 (en) 2002-01-18 2002-11-26 Pressure regulating valve for a crankcase ventilating system

Country Status (2)

Country Link
EP (1) EP1329598B1 (en)
DE (2) DE10201823A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101335763B1 (en) 2011-11-16 2013-12-02 인지컨트롤스 주식회사 Separator for internal-combustion engine
DE102020110775A1 (en) 2020-04-21 2021-10-21 Bayerische Motoren Werke Aktiengesellschaft Ventilation device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019880A1 (en) * 2006-04-28 2007-10-31 Audi Ag Motor housing cover for internal combustion engine, has inlet opening for exhaust medium that is conducted by exhaust system, and part of oil separator housing formed integrally with cover
EP3100780B1 (en) 2015-06-01 2021-02-24 Mann + Hummel Gmbh Oil separator and method for regulating the pressure in a crank case ventilation system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022129A1 (en) * 1990-07-11 1992-01-16 Mann & Hummel Filter PRESSURE CONTROL VALVE FOR INSTALLATION IN A BLEEDING LINE ON AN INTERNAL COMBUSTION ENGINE
DE29617263U1 (en) * 1996-10-04 1996-11-21 Mann & Hummel Filter Crankcase ventilation valve
DE19700733C2 (en) * 1997-01-11 2001-11-22 Bayerische Motoren Werke Ag Crankcase ventilation through the cylinder head cover with integrated additional functions
DE19746763C2 (en) * 1997-10-23 2002-06-13 Walter Schiffer Diaphragm controlled pressure control valve
FR2826691B1 (en) * 2001-07-02 2003-09-26 Solvay CIRCUIT FOR RESPIRATING THE CRANKCASE GASES OF AN INTERNAL COMBUSTION ENGINE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101335763B1 (en) 2011-11-16 2013-12-02 인지컨트롤스 주식회사 Separator for internal-combustion engine
DE102020110775A1 (en) 2020-04-21 2021-10-21 Bayerische Motoren Werke Aktiengesellschaft Ventilation device
WO2021213778A1 (en) 2020-04-21 2021-10-28 Bayerische Motoren Werke Aktiengesellschaft Deaerating device

Also Published As

Publication number Publication date
EP1329598A1 (en) 2003-07-23
DE10201823A1 (en) 2003-07-31
DE50209072D1 (en) 2007-02-08

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