EP3914812A1 - Cylinder head - Google Patents

Cylinder head

Info

Publication number
EP3914812A1
EP3914812A1 EP20701133.9A EP20701133A EP3914812A1 EP 3914812 A1 EP3914812 A1 EP 3914812A1 EP 20701133 A EP20701133 A EP 20701133A EP 3914812 A1 EP3914812 A1 EP 3914812A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
internal combustion
combustion engine
oil
fuel rail
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20701133.9A
Other languages
German (de)
French (fr)
Other versions
EP3914812B1 (en
Inventor
Alfred Inden
Daniel Bertram
Gerald Leyh
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.)
Deutz AG
Original Assignee
Deutz 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 Deutz AG filed Critical Deutz AG
Publication of EP3914812A1 publication Critical patent/EP3914812A1/en
Application granted granted Critical
Publication of EP3914812B1 publication Critical patent/EP3914812B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/04Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/04Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/0002Cylinder arrangements
    • F02F7/0004Crankcases of one-cylinder engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/0021Construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/04Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0433Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/04Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0461Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a labyrinth
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames

Definitions

  • the invention relates to an internal combustion engine with a pre-separation chamber for oil aerosol separation
  • crankcase ventilation In engine developments, the crankcase ventilation must be given adequate space.
  • crankcase ventilation system is used to separate oil-containing components (aerosols) from the leakage gas volume that is inevitable due to the system, which get into the crankcase via piston rings, ATL seals and valve stem seals, and from there must be drained off using appropriate oil separators.
  • Oil separators of internal combustion engines have the task of cleaning the oil-gas mixture located in the crankcase by separating the oil droplets from this mixture and returning them to the oil sump in the oil pan, while guiding gases into the suction area.
  • the oil separator is connected at its entrance to the crankcase and at its exit to the intake area.
  • An oil separator of the type mentioned above is known for example from DE 4239108 A1.
  • return lines are provided there, which are located below the oil level in the oil sump of the oil pan.
  • 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 to the engine block is required, through which the oil to be filled in or the oil flowing back from the pressure control valve is fed to the oil pan and also receives the oil dipstick.
  • 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 which passes through the piston rings and 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.
  • the oil separation from the crankcase gases takes place today mainly with the help of separators, which consist of a knitted fabric or with the help of jet deflections on baffle plates or a combination of both processes.
  • the separation efficiency achievable with the previous separators is not effective enough for future engines. Therefore, ultra-fine filters, possibly also as easy-change filter systems, will be used.
  • these have the disadvantage that, due to the principle, they work with a high differential pressure and thus lead to tightness problems on the engine.
  • the invention has for its object to provide an internal combustion engine which avoids the disadvantages mentioned above.
  • an internal combustion engine comprising at least one cylinder crankcase, at least one cylinder head with at least one valve cover, with gas exchange valves, valve train, injectors, injector wiring harness, and injection valve in the cylinder head. Pipes, fuel rail and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged.
  • 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 the interface, minimizing the installation effort by the assembly and the reduction of lines in the Engine periphery.
  • the cylinder head closes off the combustion chamber at the top.
  • intake and exhaust valves as well as injection nozzles or injectors, via 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 by the valve cover via a corresponding wiring harness.
  • FIG. 2 shows a longitudinal section through the cylinder head from FIG. 1,
  • FIGS. 1 and 2 without valve hood
  • Fig. 4 shows an alternative cross section through the cylinder head of the internal combustion engine.
  • 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.
  • the installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1.
  • 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 gear compartment a by a web b in the cast contour of the cylinder head and an impact wall c integrated in the valve cover.
  • the gas transfer from the valve drive chamber a into the fuel rail space or calming chamber d takes place via the passages h necessary for carrying out 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.
  • the installation space provided for the fuel rail 5 is simultaneously used as a pre-separation space for the oil sol separation, as is shown in FIG. 1.
  • the construction 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 drive compartment a by a web b in the cast contour of the cylinder head and an impact wall c integrated in the valve cover.
  • the gas transfer from the valve drive chamber a into the fuel rail space or calming chamber d takes place via the passages h necessary for carrying out the high-pressure lines 4 of the injectors 3.
  • FIG. 3 shows a top view of the cylinder head 2 from FIGS. 1 and 2 without a valve cover.
  • the cylinder head 2 there are gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the blow-by volume flow Oil aerosols arranged.
  • the installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1.
  • the construction space d enclosing 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 compartment by a web b in the cast contour of the cylinder head and an impact wall c integrated into the valve cover.
  • the gas transfer from the valve drive chamber a into the fuel rail space or calming space d takes place via the passages h necessary for carrying out the high-pressure lines 4 of the injector 3.
  • the separated amount of oil is discharged through a drainage option i through the crankcase into the oil pan.
  • FIG. 4 shows an internal combustion engine 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 installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1.
  • 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 compartment by a web b in the cast contour of the cylinder head and an impact wall c integrated into the valve cover.

Landscapes

  • 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)

Abstract

The invention relates to an internal combustion engine, comprising a cylinder crankcase, at least one cylinder head (2) having at least one valve cover (1), wherein gas exchange valves, a valve drive, injectors (3), an injector cable harness, injection lines (4), a fuel rail (5) and a pre-separator for separating the oil aerosols contained in the blow-by volume stream are arranged in the cylinder head (2).

Description

Zylinderkopf Cylinder head
B E S C H R E I B U N G DESCRIPTION
Die Erfindung betrifft eine Brennkraftmaschine mit einem Vorabscheideraum für die Ölaerosolabscheidung The invention relates to an internal combustion engine with a pre-separation chamber for oil aerosol separation
Aktuelle Motoren zeigen eine immer größere Leistungsdichte bei gleichzeitig weiter steigender Anforderung an die Emissionswerte. Dies bedingt zum einen minimale Maschinenabmaße, zum anderen aber auch den Einsatz effizienter Technologien sowie die Integration verschiedener Funktionen in vorhandene Bauteile. Current engines show an ever increasing power density with a simultaneously increasing demand on the emission values. On the one hand, this means minimal machine dimensions, but on the other hand, the use of efficient technologies and the integration of various functions in existing components.
Bei Motorenentwicklungen ist der Kurbelgehäuseentlüftung entsprechend Raum einzuräumen. In engine developments, the crankcase ventilation must be given adequate space.
Die Kurbelgehäuseentlüftung dient der Abscheidung ölhaltiger Bestandteile (Aerosole) aus der systembedingt unvermeidlichen Leckagegasmenge, die über Kolbenringe, ATL-Abdichtung sowie Ventilschaftabdichtungen ins Kur belgehäuse gelangen und von dort über entsprechende Ölabscheidevor- richtungen abgeleitet werden müssen. The crankcase ventilation system is used to separate oil-containing components (aerosols) from the leakage gas volume that is inevitable due to the system, which get into the crankcase via piston rings, ATL seals and valve stem seals, and from there must be drained off using appropriate oil separators.
Ölabscheider von Brennkraftmaschinen haben die Aufgabe, das im Kurbel gehäuse befindliche Öl-Gas-Gemisch zu reinigen, indem sie die Öltröpf chen aus diesem Gemisch abscheiden und in den Ölsumpf der Ölwanne zurückführen, während sie Gase in den Ansaugbereich leiten. Der Ölab scheider ist zu diesem Zweck an seinem Eingang mit dem Kurbelgehäuse und an seinem Ausgang mit dem Ansaugbereich verbunden. Ein Ölabscheider der vorstehend angesprochenen Art ist beispielsweise aus der DE 4239108 A1 bekannt. Zur Rückführung des abgeschiedenen Öls sind dort Rückführleitungen vorgesehen, die unterhalb des Ölspiegels in den Öl- sumpf der Ölwanne münden. Die DE 4017074 A1 offenbart ein Druckregelventil für die Kurbelgehäuseentlüftung an einer Brennkraftmaschine, wobei dieses Druckregelventil in Kombination mit einer Einfüllöffnung für Motoröl und einem Ölpeilstab angeordnet ist. Diese Kombination zeichnet sich dadurch aus, dass sie platzsparend ist und sämtliche Komponenten, die die Ölversorgung und -Überwachung einer Brennkraftmaschine betreffen, zent ral verbindet. Diese Kombination zeichnet sich weiterhin dadurch aus, dass lediglich ein einziger Anschluss an dem Motorblock erforderlich ist, durch welchen das einzufüllende Öl bzw. das aus dem Druckregelventil zurück laufende Öl der Ölwanne zugeführt wird und außerdem den Ölpeilstab auf nimmt. Oil separators of internal combustion engines have the task of cleaning the oil-gas mixture located in the crankcase by separating the oil droplets from this mixture and returning them to the oil sump in the oil pan, while guiding gases into the suction area. For this purpose, the oil separator is connected at its entrance to the crankcase and at its exit to the intake area. An oil separator of the type mentioned above is known for example from DE 4239108 A1. To return the separated oil, return lines are provided there, which are located below the oil level in the oil sump of the oil pan. 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 to the engine block is required, through which the oil to be filled in or the oil flowing back from the pressure control valve is fed to the oil pan and also receives the oil dipstick.
Weiter ist aus der WO 98/49432A1 bekannt, Öltröpfchen eines Öltröpf- chen-Gas-Gemisches unter der Zentrifugalwirkung eines in einem Gehäuse rotierenden Zahnrades abzuscheiden, wobei ein mit der Rotationsachse des Zahnrades fluchtendes Rohr die gereinigten Gase aus dem Gehäuse abführt. Furthermore, it is known from WO 98 / 49432A1 to separate oil droplets of an oil droplet-gas mixture under the centrifugal action of a gear wheel rotating in a housing, a pipe aligned with the axis of rotation of the gear wheel discharging the cleaned gases from the housing.
Aus der JP 2000-38915 A ist ein an einem Zylinderkopfdeckel angeordneter Ölabscheider bekannt, der ein Gehäuse aufweist, auf dessen waagerechter Bodenfläche drei L-förmige Winkel angeordnet sind, wobei die Rückseiten der senkrechten L-Balken mit Ablauföffnungen in der Bodenflä che fluchten. An der Decke des Gehäuses ist ein Rohr in das Gehäuse eingeschoben, durch das die von Öltröpfchen befreiten Gase über ein Ventil entweichen. From JP 2000-38915 A an arranged on a cylinder head oil separator is known which has a housing on the horizontal bottom surface of which three L-shaped angles are arranged, the rear sides of the vertical L-bars being aligned with drainage openings in the bottom surface. A tube is inserted into the housing on the ceiling through which the gases freed from oil droplets escape via a valve.
Die DE 2103061 zeigt eine Vorrichtung zum Rückführen von Gasen aus dem Motorgehäuse eines Brennkraftmotors in dessen Gaseinführsystem. 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 Entlüftung des Kurbelgehäuses, insbesondere bei Motorrädern, bekannt, bei der die Beschmutzung der Maschine oder der Kleidung des Fahrers sowie Ölverluste ausgeschlossen werden sollen. Bei aufgeladenen Motoren, deren ölhaltiges Gas vor der Turbine zugeführt wird, besteht bei hochauf- geladenen Motoren die Gefahr, dass durch die hohem Temperaturen in der Turbine Verlackungen auftreten, die für den Turbolader schädlich sein kön nen. Aus diesem Grund wird bei dieser Motorenart die Möglichkeit genutzt, eine offene Kurbelgehäuseentlüftung zu verwenden. Nachteilig ist hier, dass dieser Auffangbehälter gewartet werden muss. Hierbei werden die Kurbelgehäusegase ins Freie abgeleitet. Wie oben beschrieben, sind diese Gase trotz Vorabscheidung immer noch ölhaltig und so kann auch Öl ins Freie gelangen, was ebenfalls nachteilig ist. From DE 423791 an internal combustion engine with a device for venting the crankcase, especially in motorcycles, is known, in which the contamination of the machine or the driver's clothing as well as oil losses are to be excluded. In the case of supercharged engines, the oil-containing gas of which is fed upstream of the turbine, charged engines there is a risk that the high temperatures in the turbine will cause varnish, which can be harmful to the turbocharger. For this reason, this type of engine uses the option of using an open crankcase ventilation. The disadvantage here is that this container has to be serviced. Here, the crankcase gases are discharged outdoors. As described above, these gases are still oily despite pre-separation and so oil can also escape to the outside, which is also disadvantageous.
DE 19914166 zeigt einen rotatorisch arbeitenden Ölabscheider zur Reini gung des im Kurbelgehäuse einer Brennkraftmaschine, insbesondere selbstzündenden 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.
Kurbelgehäuseentlüftungsgas oder auch Blow-by-Gas, nachfolgend Kurbel gehäusegas genannt, ist Gas, welches im Motorbetrieb an den Kolbenrin gen vorbei in das Kurbelgehäuse gelangt. Aus diesem Kurbelgehäusegas muss das aufgenommene Öl entfernt werden und das gereinigte Kurbelgehäusegas wird dann insbesondere der Verbrennungsluft zugeführt. Die Öl abscheidung aus den Kurbelgehäusegasen erfolgt heute überwiegend mit Hilfe von Abscheidern, die aus einem Gewirk von Fasern bestehen oder mit Hilfe von Strahlumlenkungen an Prallplatten oder einer Kombination beider Verfahren. Für zukünftige Motoren sind die mit den bisherigen Abscheidern erzielbaren Abscheidegrade nicht wirksam genug. Daher werden Feinstfil- ter, 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 führen. Crankcase ventilation gas or blow-by gas, hereinafter referred to as crankcase gas, is gas which passes through the piston rings and 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. The oil separation from the crankcase gases takes place today mainly with the help of separators, which consist of a knitted fabric or with the help of jet deflections on baffle plates or a combination of both processes. The separation efficiency achievable with the previous separators is not effective enough for future engines. Therefore, ultra-fine filters, possibly also as easy-change filter systems, will be used. However, these have the disadvantage that, due to the principle, they work with a high differential pressure and thus lead to tightness problems on the engine.
Die Erfindung hat die Aufgabe, eine Brennkraftmaschine zu schaffen, die die oben genannten Nachteile vermeidet. The invention has for its object to provide an internal combustion engine which avoids the disadvantages mentioned above.
Die Aufgabe der vorliegenden Erfindung wird gelöst durch eine Brennkraft maschine, umfassend wenigstens ein Zylinderkurbelgehäuse, wenigstens einen Zylinderkopf mit wenigstens einer Ventilhaube, wobei im Zylinderkopf Gaswechselventile, Ventiltrieb, Injektoren, Injektorkabelbaum, Einspritz- leitungen, Kraftstoffrail und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ölaerosole angeordnet sind. The object of the present invention is achieved by an internal combustion engine comprising at least one cylinder crankcase, at least one cylinder head with at least one valve cover, with gas exchange valves, valve train, injectors, injector wiring harness, and injection valve in the cylinder head. Pipes, fuel rail and a pre-separator for separating the oil aerosols contained in the blow-by volume flow are arranged.
Ein erfindungsgemäßer Vorteil hierbei ist die kompakte Bauart, die Redu zierung von Bauteilen, die Kombination von Funktionen, die Minimierung der Anzahl von Bauteilen des Gesamtsystems, die Reduzierung von Leckagemöglichkeiten durch Schnittstellenreduzierung, Minimierung des Installationsaufwands durch die Montage und die Reduzierung von Leitun gen 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 the interface, minimizing the installation effort by the assembly and the reduction of lines in the Engine periphery.
Der Zylinderkopf schließt den Brennraum nach oben ab. Im Zylinderkopf befinden sich Ein- und Auslassventile, sowie Einspritzdüsen bzw. Injektoren, über die der Kraftstoff in den Brennraum eingespritzt wird. Des Weite ren befinden sich, am Zylinderkopf befestigt und durch die Ventilhaube ein gehaust, der Ventiltrieb und die Ansteuerung der Injektoren über einen ent sprechenden Kabelbaum. Es besteht auch die Möglichkeit, sowohl Ein spritzleitungen als auch das Kraftstoffrail in die Funktionsgruppe Zylinder kopf-Ventilhaube zu integrieren. Weiterhin befinden sich im Zylinderkopf Einrichtungen bzw. Geometrien zur Vor- bzw. Feinabscheidung von Ölaerosolen aus dem Blow-By. The cylinder head closes off the combustion chamber at the top. In the cylinder head there are intake and exhaust valves, as well as injection nozzles or injectors, via 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 by the valve cover via a corresponding wiring harness. There is also the option of integrating both injection lines and the fuel rail into the cylinder head valve cover function group. In addition, there are devices and geometries in the cylinder head for the preliminary and fine separation of oil aerosols from blow-by.
Weitere wichtige Merkmale und Vorteile ergeben sich aus den Unteran- sprüchen, aus den Zeichnungen und aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels anhand der Zeichnungen. Es zeigen: Further important features and advantages result from the subclaims, from the drawings and from the following description of a preferred exemplary embodiment with reference to the drawings. Show it:
Fig. 1 einen Querschnitt durch den Zylinderkopf der Brennkraftmaschine mit Ventilhaube, 1 shows a cross section through the cylinder head of the internal combustion engine with valve cover,
Fig. 2 einen Längsschnitt durch den Zylinderkopf aus Fig. 1 , 2 shows a longitudinal section through the cylinder head from FIG. 1,
Fig. 3 Draufsicht auf den Zylinderkopf aus den Fig. 1 und 2 ohne Ventil haube, 3 top view of the cylinder head from FIGS. 1 and 2 without valve hood,
Fig. 4 einen alternativen Querschnitt durch den Zylinderkopf der Brennkraftmaschine. 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 Vorabschei der zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ölaerosole angeordnet. Der für das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum für die Ölaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschließende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Öltropfen. 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 Gasübertritt aus dem Ventiltriebraum a in den Kraftstoffrail raum bzw. Beruhigungsraum d erfolgt über die zur Durchführung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h. Fig. 4 shows an alternative cross section through the cylinder head of the internal combustion engine. The internal combustion engine has a cylinder head 2 and a valve cover 1. In the cylinder head 2, 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. The installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1. 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 gear compartment a by a web b in the cast contour of the cylinder head and an impact wall c integrated in the valve cover. The gas transfer from the valve drive chamber a into the fuel rail space or calming chamber d takes place via the passages h necessary for carrying out 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 Vorabschei der zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ölaerosole angeordnet. Der für das Kraftstoffrail 5 vorgesehene Bauraum wird gleich zeitig als Vorabscheideraum für die Ölaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschließende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Öltrop fen. 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 Gasübertritt aus dem Ventiltriebraum a in den Kraftstoffrail raum bzw. Beruhigungsraum d erfolgt über die zur Durchführung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h. 2 shows a cylinder head 2 and a valve cover 1 of the internal combustion engine. In the cylinder head 2, 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. The installation space provided for the fuel rail 5 is simultaneously used as a pre-separation space for the oil sol separation, as is shown in FIG. 1. The construction 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 drive compartment a by a web b in the cast contour of the cylinder head and an impact wall c integrated in the valve cover. The gas transfer from the valve drive chamber a into the fuel rail space or calming chamber d takes place via the passages h necessary for carrying out 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 Ölaerosole angeordnet. Der für das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum für die Ölaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschlie ßende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koa gulation der Öltropfen. 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 Gasübertritt aus dem Ventiltriebraum a in den Kraftstoffrail raum bzw. Beruhigungsraum d erfolgt über die zur Durchführung der Hochdruckleitungen 4 der Injekto ren 3 notwendigen Durchtritte h. Die abgeschiedene Ölmenge wird durch eine Drainagemöglichkeit i durch das Kurbelgehäuse in die Ölwanne abge leitet. FIG. 3 shows a top view of the cylinder head 2 from FIGS. 1 and 2 without a valve cover. In the cylinder head 2 there are gas exchange valves, valve train, injectors, injector wiring harness, injection lines 4, fuel rail 5 and a pre-separator for separating the blow-by volume flow Oil aerosols arranged. The installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1. The construction space d enclosing 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 compartment by a web b in the cast contour of the cylinder head and an impact wall c integrated into the valve cover. The gas transfer from the valve drive chamber a into the fuel rail space or calming space d takes place via the passages h necessary for carrying out the high-pressure lines 4 of the injector 3. The separated amount of oil is discharged through a drainage option i through the crankcase into the oil pan.
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 Ölaerosole angeordnet. Der für das Kraftstoffrail vorgesehene Bauraum wird gleichzeitig als Vorabscheideraum für die Ölaersolabscheidung genutzt, wie dies in Fig. 1 dargestellt wird. Der das Kraftstoffrail 5 umschließende Bauraum d dient als Beruhigungsraum zur Agglomeration bzw. Koagulation der Öltropfen. 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 Gasübertritt aus dem Ventiltriebraum a in den Kraftstoffrailraum bzw. Beru higungsraum d erfolgt über die zur Durchführung der Hochdruckleitungen 4 der Injektoren 3 notwendigen Durchtritte h, die zur Optimierung bzw. Redu zierung des Öleintrags in den Beruhigungsraum mit Tropfkanten e ausgerüstet sind. Zur weiteren Optimierung der Vorabscheideleistung ragt eine zusätzliche Spritzwand f in den Beruhigungsraum d, die einen separaten Vorabscheideraum g abgrenzt. Bezugszeichenliste 4 shows an internal combustion engine 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 installation space provided for the fuel rail is simultaneously used as a pre-separator for the oil sol separation, as is shown in FIG. 1. 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 compartment by a web b in the cast contour of the cylinder head and an impact wall c integrated into the valve cover. The gas transfer from the valve drive chamber a into the fuel rail space or calming space d takes place via the passages h necessary for carrying out the high-pressure lines 4 of the injectors 3, which are equipped with drip edges e for optimizing or reducing the oil input into the calming space. 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. Reference list
1 Ventilhaube 1 valve cover
2 Zylinderkopf der Brennkraftmaschine 2 cylinder head of the internal combustion engine
3 Injektor 3 injector
4 Hochdruck- bzw. Einspritzleitung 4 high pressure or injection line
5 Kraftstoffrail 5 fuel rail
a Ventiltriebraum a Valve gear box
b Steg b bridge
c Prallwand c baffle
d Beruhigungsraum/Bauraum für das Kraftstoffrail e Tro pikante d Calming space / installation space for the fuel rail e Tro spicy
f Spritzwand f bulkhead
g separater Vorabscheideraum g separate pre-separation room
h Durchtritt für Hochdruckleitung h Passage for high pressure line
i Drainagedurchtritt i Drainage passage

Claims

Zylinderkopf A N S P R Ü C H E Cylinder head REQUESTS
1. Brennkraftmaschine, umfassend wenigstens ein Zylinderkurbelgehäuse, wenigstens einen Zylinderkopf (2) mit wenigstens einer Ventilhaube (1 ), wobei im Zylinderkopf (2) Gaswechselventile, Ventiltrieb, Injektoren (3), Injektorkabelbaum, Einspritzleitungen (4), Kraftstoffrail (5) und ein Vorabscheider zum Abscheiden der im Blow-By-Volumenstrom enthaltenen Ölaerosole angeordnet sind. 1. Internal combustion engine, comprising at least one cylinder crankcase, at least one cylinder head (2) with at least one valve cover (1), wherein in the cylinder head (2) gas exchange valves, valve train, injectors (3), 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 is arranged.
2. Brennkraftmaschine nach Anspruch 1 , 2. Internal combustion engine according to claim 1,
dadurch gekennzeichnet, dass die Brennkraftmaschine Ölaerosole vom Zy linderkurbelgehäuse durch den Bereich zwischen Zylinderkopf (2) und Ven tilhaube (1 ) leitet. characterized in that the internal combustion engine directs oil aerosols from the cylinder crankcase through the area between the cylinder head (2) and the valve cover (1).
3. Brennkraftmaschine nach Anspruch 1 oder 2, 3. Internal combustion engine according to claim 1 or 2,
dadurch gekennzeichnet, dass zwischen Zylinderkopf (2) und Ventilhaube ein Bereich angeordnet ist, der das Kraftstoffrail (5) enthält und gleichzeitig als Vorabscheideraum für die Ölaerosolabscheidung vorgesehen ist. characterized in that an area is arranged between the cylinder head (2) and the valve cover, which contains the fuel rail (5) and at the same time is provided as a pre-separating space for the oil aerosol separation.
4. Brennkraftmaschine nach Anspruch 1 oder 2, 4. Internal combustion engine according to claim 1 or 2,
dadurch gekennzeichnet, dass im Zylinderkopf (2) ein Drainagedurchtritt (i) derart angeordnet ist, dass das abgeschiedene Öl durch das Zylinderkur belgehäuse in die Ölwanne ableitet. characterized in that a drainage passage (i) is arranged in the cylinder head (2) in such a way that the separated oil discharges through the cylinder crankcase into the oil pan.
5. Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 5. Internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass der Bereich (a) im Zylinderkopf (2) in dem der Injektor (3) angeordnet ist und der Bereich (d), in dem das Kraftstoffrail (5) angeordnet ist, durch die labyrinthartig angeordnete Prallwand (c) und den Steg (b) voneinander getrennt sind. characterized in that the area (a) in the cylinder head (2) in which the injector (3) is arranged and the area (d) in which the fuel rail (5) is arranged, separated by the labyrinth-like baffle (c) and the web (b).
6. Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 6. Internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass der Steg (b) und/oder die Prallwand (c) Tropfkanten (e) aufweisen. characterized in that the web (b) and / or the baffle (c) have drip edges (e).
7. Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 7. Internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass der Bereich (d), in dem das Kraftstoffrail (5) angeordnet ist, eine zusätzliche Spritzwand (f) aufweist und innerhalb des Bereiches (d) einen separaten Vorabscheideraum (g) abgrenzt. characterized in that the area (d) in which the fuel rail (5) is arranged has an additional bulkhead (f) and delimits a separate pre-separation space (g) within the area (d).
8. Verfahren zum Betreiben einer Brennkraftmaschine, 8. Method for operating an internal combustion engine,
dadurch gekennzeichnet, dass eine Vorrichtung nach einem oder mehreren der vorgenannten Ansprüche zum Einsatz kommt. characterized in that a device according to one or more of the preceding claims is used.
EP20701133.9A 2019-01-23 2020-01-08 Cylinder head Active EP3914812B1 (en)

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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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DE102019000498A1 (en) 2020-07-23
CN113272531A (en) 2021-08-17
EP3914812B1 (en) 2023-12-06
US20220074328A1 (en) 2022-03-10
WO2020151903A1 (en) 2020-07-30

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