DE3326881A1 - Crankcase ventilation system for an internal combustion engine - Google Patents

Crankcase ventilation system for an internal combustion engine

Info

Publication number
DE3326881A1
DE3326881A1 DE19833326881 DE3326881A DE3326881A1 DE 3326881 A1 DE3326881 A1 DE 3326881A1 DE 19833326881 DE19833326881 DE 19833326881 DE 3326881 A DE3326881 A DE 3326881A DE 3326881 A1 DE3326881 A1 DE 3326881A1
Authority
DE
Germany
Prior art keywords
valve
cylinder head
head cover
crankcase
crankcase ventilation
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.)
Withdrawn
Application number
DE19833326881
Other languages
German (de)
Inventor
Rolf 730 Mettingen Nägele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19833326881 priority Critical patent/DE3326881A1/en
Publication of DE3326881A1 publication Critical patent/DE3326881A1/en
Withdrawn legal-status Critical Current

Links

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
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Landscapes

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

Abstract

The invention describes a crankcase ventilation system for an internal combustion engine with an open connection between the crankcase and the valve space covered by a cylinder head cover. To control the crankcase pressure, a relief valve is provided which forms a constructional unit with an oil separator and the cylinder head cover.

Description

"Kurbelgehäuseentlüftung für eine Brennkraftmaschine""Crankcase ventilation for an internal combustion engine"

Die Erfindung bezieht sich auf eine Kurbelgehäuseentlüftung für eine Brennkraftmaschine gemäß Oberbegriff des Patentanspruches 1.The invention relates to a crankcase ventilation for a Internal combustion engine according to the preamble of claim 1.

Bei einer bekannnten Kurbelgehäuseentlüftung der vorstehend genannten Art (GB-PS 2.198.790) ist das Entlüftungsventil außen auf der Zylinderkopfhaube befestigt.In a known crankcase ventilation of the aforementioned Art (GB-PS 2.198.790) is the vent valve on the outside of the cylinder head cover attached.

Bei dieser Anordnung ergibt sich eine vergrößerte Bauhöhe des Motors und es besteht außerdem die Gefahr, daß bei niedrigen Außentemperaturen das Ventil einfriept. Da das Ventil ein vollständig gesondertes Gehäuse erfordert ist dessen Herstellung aufwendig. Schließlich beeinträchtigt die vorstehende Bauweise den ästhetischen Gesamteindruck des Motors.This arrangement results in an increased overall height of the motor and there is also the risk that the valve at low outside temperatures freezes. Since the valve requires a completely separate housing, that is Elaborate production. Finally, the above construction affects the aesthetic Overall impression of the engine.

Der Erfindung liegt die Aufgabe zugrunde die bekannte Kurbelgehäuseentlüftung so zu verbessern, daß deren Nachteile vermieden werden.The invention is based on the known crankcase ventilation to improve so that their disadvantages are avoided.

Die Aufgabe ist erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmale gelöst.The object is according to the invention by the in the characterizing part of claim 1 specified features solved.

Durch die Erfindung wird erreicht, daß die wesentlichen Teile der Kurbelgehäuseentlüftung innerhalb des Motorgehäuses nach außen verdeckt angeordnet sind, so daß der Motor einen geringeren Raumbedarf beansprucht und außerdem der ästhetische Gesamteindruck verbessert wird. Weiterhin ist es vorteilhaft, daß durch die Einbeziehung von Teilen des Ventilgehäuses in die Zylinderkopfhaube Material eingespart wird, wodurch insgesamt die Herstellung des Ventiles einfacher und kostengünstiger erfolgen kann.The invention ensures that the essential parts of the Crankcase ventilation arranged hidden to the outside within the engine housing are, so that the engine takes up less space and also the overall aesthetic impression is improved. Furthermore, it is advantageous that by the inclusion of parts of the valve housing in the cylinder head cover material is saved, making the production of the valve simpler and cheaper overall can be done.

Weiterhin vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further advantageous refinements of the invention are the subject matter of the subclaims.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.

Es zeigen: Fig. 1 die Zylinderkopfhaube mit eingebautem Entlüftungsventil und Ölabscheider im Längsschnitt und Fig. 2 die Zylinderkopfhaube aus Fig. 1 im Querschnitt.They show: FIG. 1 the cylinder head cover with a built-in vent valve and oil separator in longitudinal section and FIG. 2 shows the cylinder head cover from FIG. 1 in Cross-section.

Die in Fig. 1 dargestellte Zylinderkopfhaube 1 ist Bestandteil einer nicht gezeigten Brennkraftmaschine bei der das Kurbelgehäuse und der von der Zylinderkopfhaube 1 nach außen abgedeckte Ventilraum 2 in offener Verbindung stehen. Die im Kurbelgehäuse anfallenden Abgase gelangen über die offene Verbindung in den Ventilraum 2 und werden von dort über ein den Gasdruck steuerndes Entlüftungsventil 3 in das Ansaugsystem abgeleitet.The cylinder head cover 1 shown in Fig. 1 is part of a Internal combustion engine, not shown, in which the crankcase and that of the cylinder head cover 1 to the outside covered valve chamber 2 are in open communication. The exhaust gases generated in the crankcase reach the via the open connection Valve chamber 2 and from there via a vent valve that controls the gas pressure 3 diverted into the intake system.

Erfindungsgemäß ist das Entlüftungsventil 3 innerhalb der Zylinderkopfhaube 1 so integriert angeordnet, daß es bei geringst möglichen Platzbedarf nicht aus dem Motorgehäuse vorsteht. Das im Bereich der Haubenoberseite 19 angeordnete Entlüftungsventil 3 besitzt ein Ventilgehäuse 4 das aus einem an der Zylinderkopfhaube 1 zum Ventilraum 2 hin durch Anformen oder Angießen gebildeten Gehäuseteil 5 und einem gesonderten Gehäuseteil 6 besteht, die beide miteinander verschraubt sind.According to the invention, the vent valve 3 is inside the cylinder head cover 1 arranged so integrated that it does not take up the smallest possible space protrudes from the motor housing. The vent valve arranged in the area of the top 19 of the hood 3 has a valve housing 4 that extends from a cylinder head cover 1 to the valve chamber 2 formed by molding or casting on housing part 5 and a separate one Housing part 6 consists, both of which are screwed together.

Zur Steuerung des Gasdruckes befindet sich im Ventilgehäuse als Steuerglied eine Membran 7. Durch die Membran 7 wird das Ventilgehäuse 4 in einen oberen Membranraum 8 der über eine Bohrung 9 vom Atmosphärendruck und einen unteren Membranraum 10, der über Öffnungen 11 vom Gasdruck beaufschlagt ist, unterteilt.To control the gas pressure, there is a control element in the valve housing a membrane 7. Through the membrane 7, the valve housing 4 is in an upper membrane space 8 of the atmospheric pressure via a bore 9 and a lower membrane space 10, which is acted upon by the gas pressure via openings 11, divided.

Im unteren Membranraum 10 befindet sich ein zentralgelegenes und von der Membran 7 beherrschtes Ventil 12 über das je nach den gegebenen Druckverhältnissen die Abgase in einen in Haubenlängsrichtung verlaufenden Kanal 13 und über eine weitere Öffnung 14 in die Entlüftungsleitung abgeleitet werden.In the lower membrane space 10 there is a centrally located and from the membrane 7 dominated valve 12 via the depending on the given pressure conditions the exhaust gases into a duct 13 running in the longitudinal direction of the hood and via another Opening 14 can be derived into the vent line.

Das Entlüftungsventil 3 befindet sich in einem Entlüftungsschacht 15, der ebenfalls zusammen mit der Zylinderkopfhaube 1 aus einem Teil gefertigt sein kann. Der Entlüftungs- schacht 15 dient als Ölabscheider in dem die Ölbestandteile von den Abgasen getrennt und wieder in das Kurbelgehäuse zurückgeführt werden.The vent valve 3 is located in a vent shaft 15, which is also made from one part together with the cylinder head cover 1 can be. The vent shaft 15 serves as an oil separator in which separates the oil components from the exhaust gases and returns them to the crankcase to be led back.

Gemäß dem Ausführungsbeispiel der Fig. 1 erstreckt sich der Entlüftungsschacht im wesentlichen über die Länge und Breite der Zylinderkopfhaube 1 und wird durch Teile der Haubenwände und einer etwa in halber Höhe an diesen befestigten Abdeckplatte 16 gebildet und ist gegenüber dem verbleibenden Ventilraum 2 bis auf eine Eintrittsöffnung 17 dicht abgeschlossen. Über die Eintrittsöffnung gelangen die Abgase in den Entlüftungsschacht 15 und von dort zu dem am anderen Schachtende liegenden Entlüftungsventil 3.According to the embodiment of FIG. 1, the ventilation shaft extends essentially over the length and width of the cylinder head cover 1 and is through Parts of the hood walls and a cover plate attached to them at about half the height 16 and is opposite the remaining valve chamber 2 except for an inlet opening 17 tightly closed. The exhaust gases enter the ventilation duct via the inlet opening 15 and from there to the vent valve 3 located at the other end of the shaft.

Claims (5)

Patentansprüche rl Kurbelgehäuseentlüftung für eine Brennkraftmaschine mit einer offenen Verbindung zwischen Kurbelgehäuse und dem durch eine Zylinderkopfhaube abgedeckten Ventilraum, der über ein an der Zylinderkopfhaube angeordnetes Entlüftungsventil und eine Entlüftungsleitung mit der Ansaugleitung verbunden ist, dadurch gekennzeichnet, daß das Entlüftungsventil (3) und die Zylinderkopfhaube (1) ganz oder im wesentlichen eine Baueinheit bilden. Claims rl crankcase ventilation for an internal combustion engine with an open connection between the crankcase and the cylinder head cover covered valve chamber, which is via a vent valve arranged on the cylinder head cover and a vent line is connected to the suction line, characterized in that that the vent valve (3) and the cylinder head cover (1) wholly or substantially form a unit. 2. Kurbelgehäuseentlüftung nach Anspruch 1, dadurch gekennzeichnet, daß das Ventilgehäuse (4) des Entlüftungsventils (3) aus einem von der Zylinderkopfhaube (1) gebildeten Gehäuseteil (5) und einem gesonderten Gehäuseteil (6) besteht, die miteinander verschraubt sind. 2. Crankcase ventilation according to claim 1, characterized in that that the valve housing (4) of the vent valve (3) from one of the cylinder head cover (1) formed housing part (5) and a separate housing part (6), which are screwed together. 3. Kurbelgehäuseentlüftung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die im Ventilgehäuse (4) als Steuerglied angeordnete Membran (7) einen oberen im haubenseitigen Gehäuseteil (5) liegenden, vom Atmosphärendruck beaufschlagten Membranraum (8) und zum Ventilraum hin einen unteren vom Kurbelgehäusedruck beaufschlagten Membranraum (10) hat.3. crankcase ventilation according to claim 1 and 2, characterized in that that the in the valve housing (4) arranged as a control member membrane (7) an upper in the hood-side housing part (5), acted upon by atmospheric pressure The diaphragm chamber (8) and, towards the valve chamber, a lower one acted upon by the crankcase pressure Has membrane space (10). 4. Kurbelgehäuseentlüftung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß im gesonderten Gehäuseteil (6) Öffnungen (11) zum Einströmen der Abgase aus dem Kurbelgehäuse in den unteren Membranraum (10) und ein von der Membran beherrschtes Ventil (12) vorgesehen ist, das mit einem sich in Längsrichtung der Zylinderkopfhaube (1) erstreckenden Kanal (13) verbunden ist, über den die Abgase in die Entlüftungsleitung abführbar sind.4. Crankcase ventilation according to one of claims 1 to 3, characterized characterized in that in the separate housing part (6) openings (11) for inflow the exhaust gases from the crankcase into the lower membrane space (10) and one of the Membrane-dominated valve (12) is provided, which extends in the longitudinal direction the cylinder head cover (1) extending channel (13) is connected through which the exhaust gases can be discharged into the vent line. 5. Kurbelgehäuseentlüftung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß dem Entlüftungsventil (3) ein Olabscheider vorgelagert ist, der aus einem sich im wesentlichen über die Länge der Zylinderkopfhaube (1) erstreckenden Luftschacht (15) besteht, der zum Ventilraum (2) hin etwa in halber Haubenhöhe durch eine Abdeckplatte (16) dicht verschlossen ist, wobei die Eintrittsöf£nung (17) der Abgase vom Entlüftungsventil (3) entfernt angeordnet ist.5. Crankcase ventilation according to one of claims 1 to 4, characterized characterized in that an oil separator is upstream of the vent valve (3), the one extending essentially over the length of the cylinder head cover (1) There is an air shaft (15) leading to the valve chamber (2) at about half the height of the hood a cover plate (16) is tightly closed, the inlet opening (17) of the Exhaust gases from the vent valve (3) is arranged away.
DE19833326881 1983-07-26 1983-07-26 Crankcase ventilation system for an internal combustion engine Withdrawn DE3326881A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833326881 DE3326881A1 (en) 1983-07-26 1983-07-26 Crankcase ventilation system for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833326881 DE3326881A1 (en) 1983-07-26 1983-07-26 Crankcase ventilation system for an internal combustion engine

Publications (1)

Publication Number Publication Date
DE3326881A1 true DE3326881A1 (en) 1984-05-24

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0448431A1 (en) * 1990-03-22 1991-09-25 Automobiles Peugeot Intake device and oil separator for an internal combustion engine and engine provided with this device
US5129371A (en) * 1991-09-03 1992-07-14 Saturn Corporation Cam cover oil separator for crankcase ventilation
DE4136894C1 (en) * 1991-11-09 1992-11-26 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Crankcase gas extractor for vehicle IC-engine - has two working volumes separated by domed membrane with stiffened base
EP0516879A1 (en) * 1991-06-06 1992-12-09 Mercedes-Benz Ag Internal combustion engine with an intake manifold for fresh air intake
DE4416119A1 (en) * 1994-05-06 1995-11-09 Knecht Filterwerke Gmbh Crankcase ventilation valve for IC engine
EP0730086A1 (en) * 1995-03-01 1996-09-04 Knecht Filterwerke Gmbh Cyclone separator for the crankcase ventilation of an internal combustion engine with a ventilation valve
DE19602194A1 (en) * 1996-01-23 1997-07-24 Deutz Ag Piston IC-engine crankcase breather
DE19701977A1 (en) * 1997-01-22 1998-07-23 Mann & Hummel Filter Internal combustion engine with a valve chamber cover
WO1999061761A1 (en) * 1998-05-13 1999-12-02 Scania Cv Aktiebolag (Publ) Arrangement for a supercharged combustion engine with crankcase ventilation
WO2002099257A1 (en) * 2001-06-07 2002-12-12 Robert Bosch Gmbh Oil separating device for crankshaft gases of an internal combustion engine
EP0978639B1 (en) * 1998-08-06 2004-10-13 Volkswagen Aktiengesellschaft Cylinder head cover
DE4406986B4 (en) * 1994-03-03 2005-05-12 Deutz Ag Reciprocating internal combustion engine
DE102004012160A1 (en) * 2004-03-12 2005-09-29 Adam Opel Ag Crankcase ventilation arrangement involves crankcase, cylinder head, cylinder head cover, all for an automotive vehicle, with cylinder head cover housing with at least one inner space
FR2868122A1 (en) * 2004-03-25 2005-09-30 Volkswagen Ag Pressure control valve for internal combustion engine, has recess, with trough shaped section, receiving oil particles through oil return duct to oil pan placed under crankshaft zone
FR2891588A1 (en) * 2005-09-30 2007-04-06 Mecaplast Sa Cylinder head cover for internal combustion engine, has heating unit that electrically heats crankcase emissions circulating in circulation duct and with temperature regulator connected to thermistor having positive temperature coefficient
DE102008030134A1 (en) 2007-08-07 2009-02-19 Dichtungstechnik G. Bruss Gmbh & Co. Kg Pressure regulating valve for use in cylinder head cover of internal combustion engine of motor vehicle, has valve element arranged in compensation chamber such that element is pressure compensated with respect to pressure in flow chamber
WO2015197548A1 (en) * 2014-06-27 2015-12-30 Elringklinger Ag Cylinder head cover and method for producing a cylinder head cover
US10787942B2 (en) 2017-10-20 2020-09-29 Mann+Hummel Gmbh Valve component for regulating or controlling a fluid pressure

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0448431A1 (en) * 1990-03-22 1991-09-25 Automobiles Peugeot Intake device and oil separator for an internal combustion engine and engine provided with this device
FR2660017A1 (en) * 1990-03-22 1991-09-27 Peugeot DEVICE FOR ADMITTING AND DISCHARGING GASES IN AN INTERNAL COMBUSTION ENGINE AND MOTOR EQUIPPED WITH SAID DEVICE.
EP0516879A1 (en) * 1991-06-06 1992-12-09 Mercedes-Benz Ag Internal combustion engine with an intake manifold for fresh air intake
US5235938A (en) * 1991-06-06 1993-08-17 Mercedes-Benz Ag Internal combustion engine having an induction conduit for the induction of fresh air
US5129371A (en) * 1991-09-03 1992-07-14 Saturn Corporation Cam cover oil separator for crankcase ventilation
DE4136894C1 (en) * 1991-11-09 1992-11-26 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Crankcase gas extractor for vehicle IC-engine - has two working volumes separated by domed membrane with stiffened base
DE4406986B4 (en) * 1994-03-03 2005-05-12 Deutz Ag Reciprocating internal combustion engine
DE4416119A1 (en) * 1994-05-06 1995-11-09 Knecht Filterwerke Gmbh Crankcase ventilation valve for IC engine
DE4416119B4 (en) * 1994-05-06 2006-02-09 Mahle Filtersysteme Gmbh Crankcase ventilation valve
EP0730086A1 (en) * 1995-03-01 1996-09-04 Knecht Filterwerke Gmbh Cyclone separator for the crankcase ventilation of an internal combustion engine with a ventilation valve
DE19602194A1 (en) * 1996-01-23 1997-07-24 Deutz Ag Piston IC-engine crankcase breather
DE19602194B4 (en) * 1996-01-23 2005-07-28 Deutz Ag crankcase ventilation
DE19701977A1 (en) * 1997-01-22 1998-07-23 Mann & Hummel Filter Internal combustion engine with a valve chamber cover
WO1998032955A1 (en) * 1997-01-22 1998-07-30 Filterwerk Mann+Hummel Gmbh Internal combustion engine with a valve chamber cap
DE19701977B4 (en) * 1997-01-22 2006-11-23 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Internal combustion engine with a valve chamber cover
WO1999061761A1 (en) * 1998-05-13 1999-12-02 Scania Cv Aktiebolag (Publ) Arrangement for a supercharged combustion engine with crankcase ventilation
EP0978639B1 (en) * 1998-08-06 2004-10-13 Volkswagen Aktiengesellschaft Cylinder head cover
WO2002099257A1 (en) * 2001-06-07 2002-12-12 Robert Bosch Gmbh Oil separating device for crankshaft gases of an internal combustion engine
US6811586B2 (en) 2001-06-07 2004-11-02 Robert Bosch Gmbh Oil separating device for crankshaft gases of an internal combustion engine
DE102004012160A1 (en) * 2004-03-12 2005-09-29 Adam Opel Ag Crankcase ventilation arrangement involves crankcase, cylinder head, cylinder head cover, all for an automotive vehicle, with cylinder head cover housing with at least one inner space
FR2868122A1 (en) * 2004-03-25 2005-09-30 Volkswagen Ag Pressure control valve for internal combustion engine, has recess, with trough shaped section, receiving oil particles through oil return duct to oil pan placed under crankshaft zone
DE102004014693A1 (en) * 2004-03-25 2005-10-13 Volkswagen Ag Pressure control valve for an internal combustion engine
FR2891588A1 (en) * 2005-09-30 2007-04-06 Mecaplast Sa Cylinder head cover for internal combustion engine, has heating unit that electrically heats crankcase emissions circulating in circulation duct and with temperature regulator connected to thermistor having positive temperature coefficient
DE102008030134A1 (en) 2007-08-07 2009-02-19 Dichtungstechnik G. Bruss Gmbh & Co. Kg Pressure regulating valve for use in cylinder head cover of internal combustion engine of motor vehicle, has valve element arranged in compensation chamber such that element is pressure compensated with respect to pressure in flow chamber
WO2015197548A1 (en) * 2014-06-27 2015-12-30 Elringklinger Ag Cylinder head cover and method for producing a cylinder head cover
US10533517B2 (en) 2014-06-27 2020-01-14 Elringklinger Ag Cylinder head cover and method for producing a cylinder head cover
US10787942B2 (en) 2017-10-20 2020-09-29 Mann+Hummel Gmbh Valve component for regulating or controlling a fluid pressure

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