EP3914812B1 - Cylinder head - Google Patents

Cylinder head Download PDF

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Publication number
EP3914812B1
EP3914812B1 EP20701133.9A EP20701133A EP3914812B1 EP 3914812 B1 EP3914812 B1 EP 3914812B1 EP 20701133 A EP20701133 A EP 20701133A EP 3914812 B1 EP3914812 B1 EP 3914812B1
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EP
European Patent Office
Prior art keywords
oil
cylinder head
internal combustion
combustion engine
fuel rail
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EP20701133.9A
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German (de)
French (fr)
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EP3914812A1 (en
Inventor
Alfred Inden
Daniel Bertram
Gerald Leyh
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Deutz AG
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Deutz AG
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Publication of EP3914812A1 publication Critical patent/EP3914812A1/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
    • F01M13/04—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
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F02F7/0002—Cylinder arrangements
    • F02F7/0004—Crankcases of one-cylinder engines
    • 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
    • F02F7/0021—Construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0461—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a labyrinth
    • 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
    • F02F1/00—Cylinders; Cylinder headsĀ 
    • F02F1/24—Cylinder heads
    • 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

Definitions

  • the invention relates to an internal combustion engine with the features of the preamble of claim 1.
  • Such an internal combustion engine is, for example, from JP 2016 056709 A known.
  • DE 10 2018 116 622 A1 describes a cylinder head cover structure for an engine with a cylinder head cover and an oil separator integrated therein for separating and removing oil mist contained in blow-by gas.
  • crankcase ventilation serves to separate oil-containing components (aerosols) from the amount of leakage gas that is unavoidable due to the system, which enters the crankcase via piston rings, ATL seals and valve stem seals and must be drained from there via appropriate oil separation devices.
  • Oil separators in internal combustion engines have the task of cleaning the oil-gas mixture in the crankcase by separating the oil droplets from this mixture and returning them to the oil sump of the oil pan, while directing gases into the intake area.
  • the oil separator is connected to the crankcase at its inlet and to the intake area at its outlet.
  • An oil separator of the type mentioned above is, for example, from DE 4239108 A1 known.
  • return lines are provided, which run below the oil level into the oil sump the oil pan.
  • the DE 4017074 A1 discloses a pressure control valve for crankcase ventilation on an internal combustion engine, this pressure control valve being arranged in combination with a filler opening for engine oil and an oil dipstick.
  • This combination is characterized by the fact that it saves space and centrally connects all components that affect the oil supply and monitoring of an internal combustion engine. This combination is further characterized by the fact that only a single connection is required on the engine block, through which the oil to be filled or the oil returning from the pressure control valve is fed to the oil pan and also accommodates the oil dipstick.
  • An oil separator arranged on a cylinder head cover which has a housing on the horizontal bottom surface of which three L-shaped angles are arranged, the back sides of the vertical L-bars being aligned with drainage openings in the bottom surface.
  • a pipe is inserted into the housing on the top of the housing, through which the gases freed from oil droplets escape via a valve.
  • the DE 2103061 shows a device for returning gases from the engine housing of an internal combustion engine into its gas introduction system.
  • DE 19914166 shows a rotary oil separator for cleaning the gas contained in the crankcase of an internal combustion engine, in particular a self-igniting internal combustion engine.
  • crankcase gas Crankcase ventilation gas or blow-by gas, hereinafter referred to as crankcase gas, is gas that passes the piston rings into the crankcase during engine operation.
  • the absorbed oil must be removed from this crankcase gas and the cleaned crankcase gas is then fed, in particular, to the combustion air.
  • Oil separation from the crankcase gases is now mainly carried out with the help of separators that consist of a knitted fabric of fibers or with the help of jet deflections on baffle plates or a combination of both processes.
  • the separation levels that can be achieved with current separators are not effective enough for future engines. Therefore, ultra-fine filters, possibly also as replaceable filter systems, will be used.
  • these have the disadvantage that, due to their principle, they work with a high differential pressure and thus lead to leakage problems on the engine.
  • the invention has the task of creating an internal combustion engine that avoids the disadvantages mentioned above.
  • An advantage according to the invention here is the compact design, the reduction of components, the combination of functions, the minimization of the number of components of the overall system, the reduction of leakage possibilities by reducing interfaces, minimization of the installation effort through assembly and the reduction of lines in the engine periphery.
  • the cylinder head closes off the top of the combustion chamber.
  • the cylinder head contains intake and exhaust valves, as well as injection nozzles or injectors through which the fuel is injected into the combustion chamber.
  • the valve train and the control of the injectors are attached to the cylinder head and housed in the valve cover via a corresponding wiring harness. It is also possible to integrate both injection lines and the fuel rail into the cylinder head-valve cover functional group. Furthermore, there are devices or geometries in the cylinder head for the preliminary or fine separation of oil aerosols from the blow-by.
  • the internal combustion engine has a cylinder head 2 and a valve cover 1.
  • Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2.
  • the space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured.
  • the installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops.
  • the installation space for mounting the rail is separated from the valve train space a by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover.
  • the gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3.
  • Fig. 2 shows a cylinder head 2 and a valve cover 1 of the internal combustion engine.
  • Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2.
  • the space provided for the fuel rail 5 is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured.
  • the installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops.
  • the installation space for mounting the rail is separated from the valve train space a by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover.
  • the gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3.
  • Fig. 3 shows a top view of the cylinder head 2 from the Fig. 1 and 2 without valve cover.
  • the cylinder head 2 contains gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the gas contained in the blow-by volume flow Oil aerosols arranged.
  • the space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured.
  • the installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops.
  • the installation space for mounting the rail is separated from the valve train chamber by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover.
  • the gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3.
  • the separated amount of oil is drained through the crankcase into the oil pan via a drainage option.
  • FIG. 4 An internal combustion engine is shown which has a cylinder head 2 and a valve cover 1. Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2.
  • the space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured.
  • the installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops.
  • the installation space for mounting the rail is separated from the valve train chamber by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover.
  • the gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary to pass through the high-pressure lines 4 of the injectors 3, which are equipped with drip edges e to optimize or reduce the oil entry into the calming chamber.
  • an additional bulkhead f projects into the calming space d, which delimits a separate pre-separation space g.

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

Description

Die Erfindung betrifft eine Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to an internal combustion engine with the features of the preamble of claim 1.

Eine solche Brennkraftmaschine ist zum Beispiel aus der JP 2016 056709 A bekannt.Such an internal combustion engine is, for example, from JP 2016 056709 A known.

DE 10 2018 116 622 A1 beschreibt eine Zylinderkopfdeckelstruktur fĆ¼r einem Motor mit einem Zylinderkopfdeckel und einem in diesem integrierten Ɩlabscheider zum Abscheiden und Entfernen von in Blow-By-Gas enthaltenem Ɩlnebel. DE 10 2018 116 622 A1 describes a cylinder head cover structure for an engine with a cylinder head cover and an oil separator integrated therein for separating and removing oil mist contained in blow-by gas.

Aktuelle Motoren zeigen eine immer grĆ¶ĆŸere Leistungsdichte bei gleichzeitig weiter steigender Anforderung an die Emissionswerte. Dies bedingt zum einen minimale MaschinenabmaƟe, zum anderen aber auch den Einsatz effizienter Technologien sowie die Integration verschiedener Funktionen in vorhandene Bauteile.Current engines show an ever-increasing power density while at the same time increasing demands on emissions values. On the one hand, this requires minimal machine dimensions, but on the other hand it also requires the use of efficient technologies and the integration of various functions into existing components.

Bei Motorenentwicklungen ist der KurbelgehƤuseentlĆ¼ftung entsprechend Raum einzurƤumen.When developing engines, appropriate space must be given to the crankcase ventilation.

Die KurbelgehƤuseentlĆ¼ftung dient der Abscheidung ƶlhaltiger Bestandteile (Aerosole) aus der systembedingt unvermeidlichen Leckagegasmenge, die Ć¼ber Kolbenringe, ATL-Abdichtung sowie Ventilschaftabdichtungen ins KurbelgehƤuse gelangen und von dort Ć¼ber entsprechende Ɩlabscheidevorrichtungen abgeleitet werden mĆ¼ssen.The crankcase ventilation serves to separate oil-containing components (aerosols) from the amount of leakage gas that is unavoidable due to the system, which enters the crankcase via piston rings, ATL seals and valve stem seals and must be drained from there via appropriate oil separation devices.

Ɩlabscheider von Brennkraftmaschinen haben die Aufgabe, das im KurbelgehƤuse befindliche Ɩl-Gas-Gemisch zu reinigen, indem sie die Ɩltrƶpfchen aus diesem Gemisch abscheiden und in den Ɩlsumpf der Ɩlwanne zurĆ¼ckfĆ¼hren, wƤhrend sie Gase in den Ansaugbereich leiten. Der Ɩlabscheider ist zu diesem Zweck an seinem Eingang mit dem KurbelgehƤuse und an seinem Ausgang mit dem Ansaugbereich verbunden. Ein Ɩlabscheider der vorstehend angesprochenen Art ist beispielsweise aus der DE 4239108 A1 bekannt. Zur RĆ¼ckfĆ¼hrung des abgeschiedenen Ɩls sind dort RĆ¼ckfĆ¼hrleitungen vorgesehen, die unterhalb des Ɩlspiegels in den Ɩlsumpf der Ɩlwanne mĆ¼nden. Die DE 4017074 A1 offenbart ein Druckregelventil fĆ¼r die KurbelgehƤuseentlĆ¼ftung an einer Brennkraftmaschine, wobei dieses Druckregelventil in Kombination mit einer EinfĆ¼llƶffnung fĆ¼r Motorƶl und einem Ɩlpeilstab angeordnet ist. Diese Kombination zeichnet sich dadurch aus, dass sie platzsparend ist und sƤmtliche Komponenten, die die Ɩlversorgung und -Ć¼berwachung einer Brennkraftmaschine betreffen, zentral verbindet. Diese Kombination zeichnet sich weiterhin dadurch aus, dass lediglich ein einziger Anschluss an dem Motorblock erforderlich ist, durch welchen das einzufĆ¼llende Ɩl bzw. das aus dem Druckregelventil zurĆ¼cklaufende Ɩl der Ɩlwanne zugefĆ¼hrt wird und auƟerdem den Ɩlpeilstab aufnimmt.Oil separators in internal combustion engines have the task of cleaning the oil-gas mixture in the crankcase by separating the oil droplets from this mixture and returning them to the oil sump of the oil pan, while directing gases into the intake area. For this purpose, the oil separator is connected to the crankcase at its inlet and to the intake area at its outlet. An oil separator of the type mentioned above is, for example, from DE 4239108 A1 known. To return the separated oil, return lines are provided, which run below the oil level into the oil sump the oil pan. The DE 4017074 A1 discloses a pressure control valve for crankcase ventilation on an internal combustion engine, this pressure control valve being arranged in combination with a filler opening for engine oil and an oil dipstick. This combination is characterized by the fact that it saves space and centrally connects all components that affect the oil supply and monitoring of an internal combustion engine. This combination is further characterized by the fact that only a single connection is required on the engine block, through which the oil to be filled or the oil returning from the pressure control valve is fed to the oil pan and also accommodates the oil dipstick.

Weiter ist aus der WO 98/49432A1 bekannt, Ɩltrƶpfchen eines Ɩltrƶpfchen-Gas-Gemisches unter der Zentrifugalwirkung eines in einem GehƤuse rotierenden Zahnrades abzuscheiden, wobei ein mit der Rotationsachse des Zahnrades fluchtendes Rohr die gereinigten Gase aus dem GehƤuse abfĆ¼hrt.Next is from the WO 98/49432A1 known to separate oil droplets of an oil droplet-gas mixture under the centrifugal action of a gear rotating in a housing, with a pipe aligned with the axis of rotation of the gear discharging the cleaned gases from the housing.

Aus der JP 2000-38915 A ist ein an einem Zylinderkopfdeckel angeordneter Ɩlabscheider bekannt, der ein GehƤuse aufweist, auf dessen waagerechter BodenflƤche drei L-fƶrmige Winkel angeordnet sind, wobei die RĆ¼ckseiten der senkrechten L-Balken mit Ablaufƶffnungen in der BodenflƤche fluchten. An der Decke des GehƤuses ist ein Rohr in das GehƤuse eingeschoben, durch das die von Ɩltrƶpfchen befreiten Gase Ć¼ber ein Ventil entweichen.From the JP 2000-38915 A An oil separator arranged on a cylinder head cover is known, which has a housing on the horizontal bottom surface of which three L-shaped angles are arranged, the back sides of the vertical L-bars being aligned with drainage openings in the bottom surface. A pipe is inserted into the housing on the top of the housing, through which the gases freed from oil droplets escape via a valve.

Die DE 2103061 zeigt eine Vorrichtung zum RĆ¼ckfĆ¼hren von Gasen aus dem MotorgehƤuse eines Brennkraftmotors in dessen GaseinfĆ¼hrsystem.The DE 2103061 shows a device for returning gases from the engine housing of an internal combustion engine into its gas introduction system.

Aus der DE 423791 ist eine Brennkraftmaschine mit einer Vorrichtung zur EntlĆ¼ftung des KurbelgehƤuses, insbesondere bei MotorrƤdern, bekannt, bei der die Beschmutzung der Maschine oder der Kleidung des Fahrers sowie Ɩlverluste ausgeschlossen werden sollen. Bei aufgeladenen Motoren, deren ƶlhaltiges Gas vor der Turbine zugefĆ¼hrt wird, besteht bei hochaufgeladenen Motoren die Gefahr, dass durch die hohen Temperaturen in der Turbine Verlackungen auftreten, die fĆ¼r den Turbolader schƤdlich sein kƶnnen. Aus diesem Grund wird bei dieser Motorenart die Mƶglichkeit genutzt, eine offene KurbelgehƤuseentlĆ¼ftung zu verwenden. Nachteilig ist hier, dass dieser AuffangbehƤlter gewartet werden muss. Hierbei werden die KurbelgehƤusegase ins Freie abgeleitet.From the DE 423791 an internal combustion engine with a device for venting the crankcase, especially on motorcycles, is known, in which contamination of the machine or the driver's clothing as well as oil losses should be excluded. In supercharged engines, whose oil-containing gas is supplied in front of the turbine, there is a problem with highly supercharged ones Engines run the risk of varnish formation due to the high temperatures in the turbine, which can be harmful to the turbocharger. For this reason, the option of using open crankcase ventilation is used in this type of engine. The disadvantage here is that this collecting container has to be maintained. The crankcase gases are discharged into the atmosphere.

Wie oben beschrieben, sind diese Gase trotz Vorabscheidung immer noch ƶlhaltig und so kann auch Ɩl ins Freie gelangen, was ebenfalls nachteilig ist.As described above, these gases still contain oil despite pre-separation and oil can therefore escape into the atmosphere, which is also disadvantageous.

DE 19914166 zeigt einen rotatorisch arbeitenden Ɩlabscheider zur Reinigung des im KurbelgehƤuse einer Brennkraftmaschine, insbesondere selbstzĆ¼ndenden Brennkraftmaschine, enthaltenen Gases. DE 19914166 shows a rotary oil separator for cleaning the gas contained in the crankcase of an internal combustion engine, in particular a self-igniting internal combustion engine.

KurbelgehƤuseentlĆ¼ftungsgas oder auch Blow-by-Gas, nachfolgend KurbelgehƤusegas genannt, ist Gas, welches im Motorbetrieb an den Kolbenringen vorbei in das KurbelgehƤuse gelangt. Aus diesem KurbelgehƤusegas muss das aufgenommene Ɩl entfernt werden und das gereinigte KurbelgehƤusegas wird dann insbesondere der Verbrennungsluft zugefĆ¼hrt. Die Ɩlabscheidung aus den KurbelgehƤusegasen erfolgt heute Ć¼berwiegend mit Hilfe von Abscheidern, die aus einem Gewirk von Fasern bestehen oder mit Hilfe von Strahlumlenkungen an Prallplatten oder einer Kombination beider Verfahren. FĆ¼r zukĆ¼nftige Motoren sind die mit den bisherigen Abscheidern erzielbaren Abscheidegrade nicht wirksam genug. Daher werden Feinstfilter, eventuell auch als Wechselfiltersysteme, zum Einsatz kommen. Diese besitzen jedoch den Nachteil, dass sie prinzipbedingt mit einem hohen Differenzdruck arbeiten und somit zu Dichtheitsproblemen am Motor fĆ¼hren.Crankcase ventilation gas or blow-by gas, hereinafter referred to as crankcase gas, is gas that passes the piston rings into the crankcase during engine operation. The absorbed oil must be removed from this crankcase gas and the cleaned crankcase gas is then fed, in particular, to the combustion air. Oil separation from the crankcase gases is now mainly carried out with the help of separators that consist of a knitted fabric of fibers or with the help of jet deflections on baffle plates or a combination of both processes. The separation levels that can be achieved with current separators are not effective enough for future engines. Therefore, ultra-fine filters, possibly also as replaceable filter systems, will be used. However, these have the disadvantage that, due to their principle, they work with a high differential pressure and thus lead to leakage problems on the engine.

Die Erfindung hat die Aufgabe, eine Brennkraftmaschine zu schaffen, die die oben genannten Nachteile vermeidet.The invention has the task of creating an internal combustion engine that avoids the disadvantages mentioned above.

Die Aufgabe der vorliegenden Erfindung wird gelƶst durch eine Brennkraftmaschine mit den Merkmalen des Anspruchs 1.The object of the present invention is achieved by an internal combustion engine with the features of claim 1.

Ein erfindungsgemƤƟer Vorteil hierbei ist die kompakte Bauart, die Reduzierung von Bauteilen, die Kombination von Funktionen, die Minimierung der Anzahl von Bauteilen des Gesamtsystems, die Reduzierung von Leckagemƶglichkeiten durch Schnittstellenreduzierung, Minimierung des Installationsaufwands durch die Montage und die Reduzierung von Leitungen in der Motorperipherie.An advantage according to the invention here is the compact design, the reduction of components, the combination of functions, the minimization of the number of components of the overall system, the reduction of leakage possibilities by reducing interfaces, minimization of the installation effort through assembly and the reduction of lines in the engine periphery.

Der Zylinderkopf schlieƟt den Brennraum nach oben ab. Im Zylinderkopf befinden sich Ein- und Auslassventile, sowie EinspritzdĆ¼sen bzw. Injektoren, Ć¼ber die der Kraftstoff in den Brennraum eingespritzt wird. Des Weiteren befinden sich, am Zylinderkopf befestigt und durch die Ventilhaube eingehaust, der Ventiltrieb und die Ansteuerung der Injektoren Ć¼ber einen entsprechenden Kabelbaum. Es besteht auch die Mƶglichkeit, sowohl Einspritzleitungen als auch das Kraftstoffrail in die Funktionsgruppe Zylinderkopf-Ventilhaube zu integrieren. Weiterhin befinden sich im Zylinderkopf Einrichtungen bzw. Geometrien zur Vor- bzw. Feinabscheidung von Ɩlaerosolen aus dem Blow-By.The cylinder head closes off the top of the combustion chamber. The cylinder head contains intake and exhaust valves, as well as injection nozzles or injectors through which the fuel is injected into the combustion chamber. Furthermore, the valve train and the control of the injectors are attached to the cylinder head and housed in the valve cover via a corresponding wiring harness. It is also possible to integrate both injection lines and the fuel rail into the cylinder head-valve cover functional group. Furthermore, there are devices or geometries in the cylinder head for the preliminary or fine separation of oil aerosols from the blow-by.

Weitere wichtige Merkmale und Vorteile ergeben sich aus den UnteransprĆ¼chen, aus den Zeichnungen und aus der nachfolgenden Beschreibung eines bevorzugten AusfĆ¼hrungsbeispiels anhand der Zeichnungen. Es zeigen:

Fig. 1
einen Querschnitt durch den Zylinderkopf der Brennkraftmaschine mit Ventilhaube,
Fig. 2
einen LƤngsschnitt durch den Zylinderkopf aus Fig. 1,
Fig. 3
Draufsicht auf den Zylinderkopf aus den Fig. 1 und 2 ohne Ventilhaube,
Fig. 4
einen alternativen Querschnitt durch den Zylinderkopf der Brennkraftmaschine.
Further important features and advantages emerge from the subclaims, from the drawings and from the following description of a preferred exemplary embodiment based on the drawings. Show it:
Fig. 1
a cross section through the cylinder head of the internal combustion engine with valve cover,
Fig. 2
a longitudinal section through the cylinder head Fig. 1 ,
Fig. 3
Top view of the cylinder head from the Fig. 1 and 2 without valve cover,
Fig. 4
an alternative cross section through the cylinder head of the internal combustion engine.

Die Brennkraftmaschine weist einen Zylinderkopf 2 und eine Ventilhaube 1 auf. Im Zylinderkopf 2 sind Gaswechselventile, Ventiltrieb, Injektoren, Injektorkabelbaum, Einspritzleitungen 4, Kraftstoffrail 5 und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ɩlaerosole angeordnet. Der fĆ¼r das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum fĆ¼r die Ɩlaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschlieƟende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Ɩltropfen. Der Bauraum zur Montage des Rails ist durch einen Steg b in der Gusskontur des Zylinderkopfs sowie eine in die Ventilhaube integrierte Prallwand c vom Ventiltriebsraum a abgetrennt. Der GasĆ¼bertritt aus dem Ventiltriebraum a in den Kraftstoffrailraum bzw. Beruhigungsraum d erfolgt Ć¼ber die zur DurchfĆ¼hrung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h.The internal combustion engine has a cylinder head 2 and a valve cover 1. Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2. The space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured. The installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops. The installation space for mounting the rail is separated from the valve train space a by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover. The gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3.

Fig. 2 zeigt einen Zylinderkopf 2 und eine Ventilhaube 1 der Brennkraftmaschine. Im Zylinderkopf 2 sind Gaswechselventile, Ventiltrieb, Injektoren, Injektorkabelbaum, Einspritzleitungen 4, Kraftstoffrail 5 und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ɩlaerosole angeordnet. Der fĆ¼r das Kraftstoffrail 5 vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum fĆ¼r die Ɩlaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschlieƟende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Ɩltropfen. Der Bauraum zur Montage des Rails ist durch einen Steg b in der Gusskontur des Zylinderkopfs sowie eine in die Ventilhaube integrierte Prallwand c vom Ventiltriebsraum a abgetrennt. Der GasĆ¼bertritt aus dem Ventiltriebraum a in den Kraftstoffrailraum bzw. Beruhigungsraum d erfolgt Ć¼ber die zur DurchfĆ¼hrung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h. Fig. 2 shows a cylinder head 2 and a valve cover 1 of the internal combustion engine. Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2. The space provided for the fuel rail 5 is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured. The installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops. The installation space for mounting the rail is separated from the valve train space a by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover. The gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3.

Fig. 3 zeigt eine Draufsicht auf den Zylinderkopf 2 aus den Fig. 1 und 2 ohne Ventilhaube. Im Zylinderkopf 2 sind Gaswechselventile, Ventiltrieb, Injektoren, Injektorkabelbaum, Einspritzleitungen 4, Kraftstoffrail 5 und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ɩlaerosole angeordnet. Der fĆ¼r das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum fĆ¼r die Ɩlaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschlieƟende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Ɩltropfen. Der Bauraum zur Montage des Rails ist durch einen Steg b in der Gusskontur des Zylinderkopfs sowie eine in die Ventilhaube integrierte Prallwand c vom Ventiltriebsraum abgetrennt. Der GasĆ¼bertritt aus dem Ventiltriebraum a in den Kraftstoffrailraum bzw. Beruhigungsraum d erfolgt Ć¼ber die zur DurchfĆ¼hrung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h. Die abgeschiedene Ɩlmenge wird durch eine Drainagemƶglichkeit i durch das KurbelgehƤuse in die Ɩlwanne abgeleitet. Fig. 3 shows a top view of the cylinder head 2 from the Fig. 1 and 2 without valve cover. The cylinder head 2 contains gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the gas contained in the blow-by volume flow Oil aerosols arranged. The space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured. The installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops. The installation space for mounting the rail is separated from the valve train chamber by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover. The gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary for the passage of the high-pressure lines 4 of the injectors 3. The separated amount of oil is drained through the crankcase into the oil pan via a drainage option.

In Fig. 4 wird eine Brennkraftmaschine gezeigt, die einen Zylinderkopf 2 und eine Ventilhaube 1 aufweist. Im Zylinderkopf 2 sind Gaswechselventile, Ventiltrieb, Injektoren, Injektorkabelbaum, Einspritzleitungen 4, Kraftstoffrail 5 und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ɩlaerosole angeordnet. Der fĆ¼r das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum fĆ¼r die Ɩlaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschlieƟende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Ɩltropfen. Der Bauraum zur Montage des Rails ist durch einen Steg b in der Gusskontur des Zylinderkopfs sowie eine in die Ventilhaube integrierte Prallwand c vom Ventiltriebsraum abgetrennt. Der GasĆ¼bertritt aus dem Ventiltriebraum a in den Kraftstoffrailraum bzw. Beruhigungsraum d erfolgt Ć¼ber die zur DurchfĆ¼hrung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h, die zur Optimierung bzw. Reduzierung des Ɩleintrags in den Beruhigungsraum mit Tropfkanten e ausgerĆ¼stet sind. Zur weiteren Optimierung der Vorabscheideleistung ragt eine zusƤtzliche Spritzwand f in den Beruhigungsraum d, die einen separaten Vorabscheideraum g abgrenzt.In Fig. 4 An internal combustion engine is shown which has a cylinder head 2 and a valve cover 1. Gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged in the cylinder head 2. The space provided for the fuel rail is also used as a pre-separation space for oil aerosol separation, as shown in Fig. 1 is pictured. The installation space d surrounding the fuel rail 5 serves as a calming space for agglomeration or coagulation of the oil drops. The installation space for mounting the rail is separated from the valve train chamber by a web b in the cast contour of the cylinder head and a baffle c integrated into the valve cover. The gas transfer from the valve train chamber a into the fuel rail chamber or calming chamber d takes place via the passages h necessary to pass through the high-pressure lines 4 of the injectors 3, which are equipped with drip edges e to optimize or reduce the oil entry into the calming chamber. To further optimize the pre-separation performance, an additional bulkhead f projects into the calming space d, which delimits a separate pre-separation space g.

BezugszeichenlisteReference symbol list

11
VentilhaubeValve cover
22
Zylinderkopf der BrennkraftmaschineCylinder head of the internal combustion engine
33
Injektorinjector
44
Hochdruck- bzw. EinspritzleitungHigh pressure or injection line
55
Kraftstoffrail
a Ventiltriebraum
b Steg
c Prallwand
d Beruhigungsraum/Bauraum fĆ¼r das Kraftstoffrail
e Tropfkante
f Spritzwand
g separater Vorabscheideraum
h Durchtritt fĆ¼r Hochdruckleitung
i DrainagedurchtrittFuel rail
a Valve train compartment
b jetty
c Baffle wall
d Calming space/installation space for the fuel rail
e drip edge
f splash wall
g separate pre-separation room
h Passage for high-pressure line
i Drainage passage

Claims (6)

  1. An internal combustion engine, comprising
    at least one cylinder crankcase, and
    at least one cylinder head (2) having at least one valve cover (1), wherein
    gas exchange valves, valve train, injectors (3), injector cable harness, injection lines (4), fuel rail (5) and a pre-separator for separating oil aerosols contained in a blow-by-volume flow are arranged in the cylinder head (2),
    characterised in that a region (a) in the cylinder head (2) in which the injectors (3) are arranged and a region (d) in which the fuel rail (5) is arranged are separated from one another by a baffle wall (c) arranged in a labyrinth and a web (b).
  2. The internal combustion engine according to claim 1,
    characterised in that the internal combustion engine conducts oil aerosols from the cylinder crankcase through the area between the cylinder head (2) and the valve cover (1).
  3. The internal combustion engine according to claim 1 or 2,
    characterised in that a region is arranged between the cylinder head (2) and the valve cover which contains the fuel rail (5) and is simultaneously provided as a pre-separator chamber for oil aerosol separation.
  4. The internal combustion engine according to claim 1 or 2,
    characterised in that a drainage passage (i) is arranged in the cylinder head (2) in such a way that the separated oil is drained off through the cylinder crankcase into the oil pan.
  5. The internal combustion engine according to one or more of the preceding claims,
    characterised in that the web (b) and/or the baffle wall (c) have drip edges (e).
  6. The internal combustion engine according to one or more of the preceding claims,
    characterised in that the region (d) in which the fuel rail (5) is arranged has an additional splashboard (f) and delimits a separate pre-separator space (g) within this region (d).
EP20701133.9A 2019-01-23 2020-01-08 Cylinder head Active EP3914812B1 (en)

Applications Claiming Priority (2)

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DE102019000498.1A DE102019000498A1 (en) 2019-01-23 2019-01-23 Cylinder head
PCT/EP2020/000004 WO2020151903A1 (en) 2019-01-23 2020-01-08 Cylinder head

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EP3914812B1 true EP3914812B1 (en) 2023-12-06

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US (1) US20220074328A1 (en)
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CN (1) CN113272531B (en)
DE (1) DE102019000498A1 (en)
WO (1) WO2020151903A1 (en)

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US20220074328A1 (en) 2022-03-10
CN113272531B (en) 2023-09-01
EP3914812A1 (en) 2021-12-01
DE102019000498A1 (en) 2020-07-23
CN113272531A (en) 2021-08-17

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