EP3789608B1 - Combustion engine - Google Patents

Combustion engine Download PDF

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Publication number
EP3789608B1
EP3789608B1 EP20178659.7A EP20178659A EP3789608B1 EP 3789608 B1 EP3789608 B1 EP 3789608B1 EP 20178659 A EP20178659 A EP 20178659A EP 3789608 B1 EP3789608 B1 EP 3789608B1
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EP
European Patent Office
Prior art keywords
rocker arm
spark plug
cylinder
internal combustion
combustion engine
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Application number
EP20178659.7A
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German (de)
French (fr)
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EP3789608A1 (en
Inventor
Björn Dirumdam
Johannes Ruschkowski
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MAN Energy Solutions SE
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MAN Energy Solutions SE
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    • 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
    • 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
    • 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
    • F02F7/0024—Casings for larger engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/001—Ignition installations adapted to specific engine types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • 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 heads 
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/006—Ignition installations combined with other systems, e.g. fuel injection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices

Definitions

  • the invention relates to an internal combustion engine.
  • the present invention relates in particular to the area of so-called large engines or large internal combustion engines, the cylinders of which have piston diameters of more than 140 mm, in particular more than 175 mm.
  • large internal combustion engines are, for example, ship or stationary engines.
  • the internal combustion engine has a cylinder crankcase in which a crankshaft is mounted.
  • the cylinders form at least one cylinder bank.
  • Each cylinder has a cylinder head and a rocker arm box positioned above the cylinder head, the rocker arm box serving to accommodate rocker arms of a valve train.
  • US 4,706,639 A describes another internal combustion engine with a rocker arm box and a rocker arm cover.
  • DE 29 910 306 U1 , DE 4 305 684 A1 and DE 10 043 804 A1 describe further installations of ignition coils or cylinder head covers on internal combustion engines.
  • Each cylinder of the internal combustion engine includes a rocker arm box for receiving rocker arms of a valve train for the gas exchange valves and a rocker arm cover which can be pivoted relative to the respective rocker arm box.
  • the respective rocker arm cover of the internal combustion engine carries an ignition coil for the spark plug of the respective cylinder, which can be contacted with the spark plug via a spark plug extension extending through a protective tube between the cylinder head and the rocker arm box or the rocker arm cover of the respective cylinder.
  • the rocker arm cover comprises a first section with a first insertion aid, into which the protective tube threads when the rocker arm cover is pivotingly closed. Furthermore, the rocker arm cover comprises a second section with a second insertion aid, into which an end of the spark plug extension protruding from the protective tube is threaded when the rocker arm cover is pivotingly closed, in order to automatically and to form a self-centering electrical contact between the spark plug extension and the ignition coil of the respective cylinder.
  • the design of the internal combustion engine according to the invention enables easier access to the rocker arm box and to assemblies positioned in the rocker arm box. All you have to do is pivot the rocker arm cover relative to the rocker arm box. Automatic and self-centering contact between the spark plug extension and the ignition coil and thus between the spark plug and the ignition coil is possible via the insertion aids of the rocker arm cover for the protective tube and the end of the spark plug extension protruding from the protective tube.
  • the end of the spark plug extension protruding from the protective tube is guided in a plug which threads into the first insertion aid when the rocker arm cover is closed.
  • the end of the spark plug extension protruding from the plug threads into the second insertion aid when the rocker arm cover is closed.
  • the second section with the second insertion aid is arranged within an area delimited by the first section with the first insertion aid. This provides particularly advantageous automatic, self-centering contact between the spark plug extension and the ignition coil of the respective cylinder.
  • the second section forms an electrical plug contact for the end of the spark plug extension protruding from the protective tube.
  • the invention relates to an internal combustion engine.
  • the internal combustion engine is a so-called large engine or a large internal combustion engine with a piston diameter of more than 140 mm, in particular more than 175 mm.
  • Such large engines are used as drive units on ships or in power plants to generate electricity.
  • An internal combustion engine has a cylinder crankcase in which a crankshaft is mounted.
  • an internal combustion engine has several cylinders that form at least one cylinder bank. Then, when all cylinders are positioned in series, they form a cylinder bank. Then, when the cylinders are grouped in a V-shape, the cylinders form two banks of cylinders.
  • Each cylinder has gas exchange valves on the intake side and gas exchange valves on the exhaust side, which are accommodated in a cylinder head of the respective cylinder.
  • a spark plug is accommodated in the respective cylinder head, which serves to ignite a fuel to be burned in the respective cylinder of the internal combustion engine.
  • the internal combustion engine has a valve train, the valve train for the gas exchange valves of each cylinder comprising rocker arms which are accommodated in a rocker arm box of the respective cylinder.
  • Fig. 1 to 3 show a section of an internal combustion engine in the area of a cylinder, namely in the area of a rocker arm box 10 of the respective cylinder, an upper section of the rocker arm box 10 being shown.
  • a rocker arm cover 11 interacts with the respective rocker arm box 10 and is pivotally mounted on the rocker arm box 10 about an axis of rotation 12. By pivoting the rocker arm cover 11 to the rocker arm box 10, access to the rocker arm box 10 as well as to assemblies positioned in the rocker arm box 10, such as the rocker arms, can be released in order, for example, to set a valve clearance on the gas exchange valves of the respective cylinder.
  • the rocker arm cover 11 of the respective cylinder carries an ignition coil 13.
  • the spark plug of the respective cylinder can be supplied with electrical energy via the ignition coil 13 of the respective cylinder in order to ignite the respective fuel.
  • a spark plug extension 14 is shown, which extends from the respective spark plug in the direction of the ignition coil 13, namely through a protective tube 15, which runs between the cylinder head of the cylinder and the rocker arm cover 11 and therefore extends through the rocker arm box 10.
  • the spark plug extension 14 protrudes with one end 14a, with the spark plug being electrically contacted with the ignition coil 13 via this end 14a of the spark plug extension 14 protruding from the protective tube 15.
  • Fig. 1 to 3 It can be seen that the upper end 14a of the spark plug extension 14 is guided in a plug 16, which serves to secure the position of the spark plug extension 14 in the protective tube 15. The end 14a of the spark plug extension 14 protrudes from the plug 16.
  • the rocker arm cover 11 has an insertion aid 17 on a first section 11a, into which the protective tube 15 or the plug 16 is threaded when the rocker arm cover 11 is pivotingly closed.
  • the rocker arm cover 11 comprises a further insertion aid 18 on a second section 11b, into which the end 14a of the spark plug extension 14 protruding from the protective tube 15 or from the plug 16 is threaded when the rocker arm cover 11 is pivotingly closed.
  • the second section 11b with the second insertion aid 18 is arranged within an area delimited by the first section 11a with the first insertion aid 17. This is particularly preferred in order to provide the self-centering contact in the high-voltage path between the spark plug and the ignition coil 13.
  • a cable 20 extends between the plug contact for the end 14a of the spark plug extension 14 and the ignition coil 13. In contrast to this, it is possible to position the spark plug 13 directly on the second section 11b or the plug contact, in which case this is the case Cable 20 can be dispensed with.
  • the invention allows particularly easy access to assemblies accommodated in the rocker arm box 10 in internal combustion engines with spark plugs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Die Erfindung betrifft eine Brennkraftmaschine.The invention relates to an internal combustion engine.

Die hier vorliegende Erfindung betrifft insbesondere den Bereich sogenannter Großmotoren bzw. Großbrennkraftmaschinen, deren Zylinder Kolbendurchmesser von mehr als 140 mm, insbesondere von mehr als 175 mm, aufweisen. Bei solchen Großbrennkraftmaschinen handelt es sich zum Beispiel um Schiffs- oder Stationärmotoren.The present invention relates in particular to the area of so-called large engines or large internal combustion engines, the cylinders of which have piston diameters of more than 140 mm, in particular more than 175 mm. Such large internal combustion engines are, for example, ship or stationary engines.

Aus der DE 10 2012 023 836 A1 ist eine Brennkraftmaschine mit mehreren Zylindern bekannt. Die Brennkraftmaschine verfügt über ein Zylinderkurbelgehäuse, in dem eine Kurbelwelle gelagert ist. Die Zylinder bilden mindestens eine Zylinderbank aus. Jeder Zylinder verfügt über einen Zylinderkopf sowie über einen oberhalb des Zylinderkopfs positionierten Kipphebelkasten, wobei der Kipphebelkasten der Aufnahme von Kipphebeln eines Ventiltriebs dient.From the DE 10 2012 023 836 A1 an internal combustion engine with several cylinders is known. The internal combustion engine has a cylinder crankcase in which a crankshaft is mounted. The cylinders form at least one cylinder bank. Each cylinder has a cylinder head and a rocker arm box positioned above the cylinder head, the rocker arm box serving to accommodate rocker arms of a valve train.

Aus der DE 10 2012 208 076 A1 ist eine weitere Brennkraftmaschine bekannt. Hieraus ist es bekannt, dass oberhalb des oberhalb des Zylinderkopfs positionierten Kipphebelkastens eine Haube positioniert ist, die den Kipphebelkasten oben abschließt. Diese Haube ist demontierbar, um den Zugriff auf einen Innenraum des Kipphebelkastens freizugeben.From the DE 10 2012 208 076 A1 Another internal combustion engine is known. From this it is known that a hood is positioned above the rocker arm box positioned above the cylinder head, which closes the rocker arm box at the top. This hood can be removed to provide access to an interior of the rocker arm box.

US 4 706 639 A beschreibt eine weitere Brennkraftmaschine mit einem Kipphebelkasten und einem Kipphebeldeckel. DE 29 910 306 U1 , DE 4 305 684 A1 und DE 10 043 804 A1 beschreiben weitere Montagen von Zündspulen oder einer Zylinderkopfabdeckungen an Brennkraftmaschinen. US 4,706,639 A describes another internal combustion engine with a rocker arm box and a rocker arm cover. DE 29 910 306 U1 , DE 4 305 684 A1 and DE 10 043 804 A1 describe further installations of ignition coils or cylinder head covers on internal combustion engines.

Bei Brennkraftmaschinen mit Zündkerzen, bei welchen also ein zu verbrennender Kraftstoff über eine Zündkerze gezündet wird, erfordert der Zugriff auf den Kipphebelkasten durch Entfernen einer Haube bzw. eines Kipphebeldeckels großen Aufwand.In internal combustion engines with spark plugs, in which fuel to be burned is ignited via a spark plug, access to the rocker arm box by removing a hood or a rocker arm cover requires great effort.

So müssen hierzu zum Beispiel elektrische Kontaktierungen einer Zündspule, die mit der Zündkerze des jeweiligen Zylinders elektrisch leitend kontaktiert ist, aufwendig gelöst werden. Anschließend müssen diese elektrischen Kontaktierungen wieder aufwendig gesteckt werden. Dies ist von Nachteil.For example, electrical contacts of an ignition coil, which is in electrically conductive contact with the spark plug of the respective cylinder, have to be solved in a complex manner. These electrical contacts then have to be plugged in again, which is a complicated process. This is a disadvantage.

Es besteht daher Bedarf an einer Brennkraftmaschine, bei welchem der Zugriff auf den Kipphebelkasten bzw. auf im Kipphebelkasten positionierte Baugruppen, insbesondere zur Ausführung von Wartungsarbeiten, vereinfacht ist. Hiervon ausgehend liegt der Erfindung die Aufgabe zu Grunde, eine neuartige Brennkraftmaschine zu schaffen. Diese Aufgabe wird durch eine Brennkraftmaschine gemäß Anspruch 1 gelöst.There is therefore a need for an internal combustion engine in which access to the rocker arm box or to assemblies positioned in the rocker arm box is simplified, in particular for carrying out maintenance work. Based on this, the invention is based on the task of creating a new type of internal combustion engine. This object is achieved by an internal combustion engine according to claim 1.

Jeder Zylinder der Brennkraftmaschine umfasst einen Kipphebelkasten zur Aufnahme von Kipphebeln eines Ventiltriebs für die Gaswechselventile und einen Kipphebeldeckel, der relativ zum jeweiligen Kipphebelkasten schwenkbar.Each cylinder of the internal combustion engine includes a rocker arm box for receiving rocker arms of a valve train for the gas exchange valves and a rocker arm cover which can be pivoted relative to the respective rocker arm box.

Der jeweilige Kipphebeldeckel der Brennkraftmaschine trägt eine Zündspule für die Zündkerze des jeweiligen Zylinders, die mit der Zündkerze über eine sich durch ein Schutzrohr zwischen dem Zylinderkopf und dem Kipphebelkasten oder dem Kipphebeldeckel des jeweiligen Zylinders erstreckende Zündkerzenverlängerung kontaktierbar ist.The respective rocker arm cover of the internal combustion engine carries an ignition coil for the spark plug of the respective cylinder, which can be contacted with the spark plug via a spark plug extension extending through a protective tube between the cylinder head and the rocker arm box or the rocker arm cover of the respective cylinder.

Bei der erfindungsgemäßen Brennkraftmaschine umfasst der Kipphebeldeckel einen ersten Abschnitt mit einer ersten Einführhilfe, in die beim schwenkenden Schließen des Kipphebeldeckels das Schutzrohr einfädelt. Ferner umfasst der Kipphebeldeckel einen zweiten Abschnitt mit einer zweiten Einführhilfe, in die beim schwenkenden Schließen des Kipphebeldeckels ein aus dem Schutzrohr herausragendes Ende der Zündkerzenverlängerung einfädelt, um automatisch und selbstzentrierend einen elektrischen Kontakt zwischen der Zündkerzenverlängerung und der Zündspule des jeweiligen Zylinders auszubilden.In the internal combustion engine according to the invention, the rocker arm cover comprises a first section with a first insertion aid, into which the protective tube threads when the rocker arm cover is pivotingly closed. Furthermore, the rocker arm cover comprises a second section with a second insertion aid, into which an end of the spark plug extension protruding from the protective tube is threaded when the rocker arm cover is pivotingly closed, in order to automatically and to form a self-centering electrical contact between the spark plug extension and the ignition coil of the respective cylinder.

Durch die erfindungsgemäße Ausgestaltung der Brennkraftmaschine ist ein vereinfachter Zugriff auf den Kipphebelkasten sowie auf im Kipphebelkasten positionierte Baugruppen möglich. Es muss lediglich der Kipphebeldeckel relativ zum Kipphebelkasten verschwenkt werden. Über die Einführhilfen des Kipphebeldeckels für das Schutzrohr und das aus dem Schutzrohr herausragende Ende der Zündkerzenverlängerung ist eine automatische und selbstzentrierende Kontaktierung zwischen der Zündkerzenverlängerung und der Zündspule und damit zwischen die Zündkerze und der Zündspule möglich.The design of the internal combustion engine according to the invention enables easier access to the rocker arm box and to assemblies positioned in the rocker arm box. All you have to do is pivot the rocker arm cover relative to the rocker arm box. Automatic and self-centering contact between the spark plug extension and the ignition coil and thus between the spark plug and the ignition coil is possible via the insertion aids of the rocker arm cover for the protective tube and the end of the spark plug extension protruding from the protective tube.

Ein aufwendiges Lösen und Stecken von elektrischen Kontaktierungen im Hochspannungspfad zwischen der Zündkerze und der Zündspule, wie dies bei aus der Praxis bekannten Brennkraftmaschinen erforderlich ist, kann so entfallen.This eliminates the need for complicated loosening and plugging of electrical contacts in the high-voltage path between the spark plug and the ignition coil, as is required in internal combustion engines known from practice.

Nach einer vorteilhaften Weiterbildung ist das aus dem Schutzrohr herausragende Ende der Zündkerzenverlängerung in einem Stopfen geführt, der beim Schließen des Kipphebeldeckels in die erste Einführhilfe einfädelt. Das aus dem Stopfen herausragende Ende der Zündkerzenverlängerung fädelt beim Schließen des Kipphebeldeckels in die zweite Einführhilfe ein. Hiermit kann die automatische, selbstzentrierende Kontaktierung zwischen der Zündkerzenverlängerung und der Zündspule besonders vorteilhaft bereitgestellt werden.According to an advantageous development, the end of the spark plug extension protruding from the protective tube is guided in a plug which threads into the first insertion aid when the rocker arm cover is closed. The end of the spark plug extension protruding from the plug threads into the second insertion aid when the rocker arm cover is closed. This allows the automatic, self-centering contact between the spark plug extension and the ignition coil to be provided particularly advantageously.

Bei der erfindungsgemäßen Brennkraftmaschine ist der zweite Abschnitt mit der zweiten Einführhilfe innerhalb eines von dem ersten Abschnitt mit der ersten Einführhilfe begrenzten Bereichs angeordnet. Damit ist eine automatische, selbstzentrierende Kontaktierung zwischen der Zündkerzenverlängerung und der Zündspule des jeweiligen Zylinders besonders vorteilhaft bereitgestellt.In the internal combustion engine according to the invention, the second section with the second insertion aid is arranged within an area delimited by the first section with the first insertion aid. This provides particularly advantageous automatic, self-centering contact between the spark plug extension and the ignition coil of the respective cylinder.

Nach einer vorteilhaften Weiterbildung bildet der zweite Abschnitt einen elektrischen Steckkontakt für das aus dem Schutzrohr herausragende Ende der Zündkerzenverlängerung aus. Auch diese Weiterbildung erlaubt es, die automatische, selbstzentrierende Kontaktierung zwischen der Zündkerzenverlängerung und der Zündspule auf besonders vorteilhafte Weise bereitzustellen.According to an advantageous development, the second section forms an electrical plug contact for the end of the spark plug extension protruding from the protective tube. This development also makes it possible to provide the automatic, self-centering contact between the spark plug extension and the ignition coil in a particularly advantageous manner.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1
eine Ausschnitt aus einer erfindungsgemäßen Brennkraftmaschine im Bereich eines Kipphebelkastens und eines Kipphebeldeckels bei geschlossenem Kipphebeldeckel;
Fig. 2
den Ausschnitt der Fig. 1 bei teilweise geöffnetem Kipphebeldeckel;
Fig. 3
den Ausschnitt der Fig. 1, 2 bei gegenüber Fig. 2 weiter geöffnetem Kipphebeldeckel.
Preferred developments of the invention result from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail using the drawing, without being limited to this. This shows:
Fig. 1
a section of an internal combustion engine according to the invention in the area of a rocker arm box and a rocker arm cover with the rocker arm cover closed;
Fig. 2
the section of the Fig. 1 with the rocker cover partially open;
Fig. 3
the section of the Fig. 1, 2 at opposite Fig. 2 rocker cover still open.

Die Erfindung betrifft eine Brennkraftmaschine.The invention relates to an internal combustion engine.

Insbesondere handelt es sich bei der Brennkraftmaschine um einen sogenannten Großmotor bzw. eine Großbrennkraftmaschine mit einem Kolbendurchmesser von mehr als 140 mm, insbesondere von mehr als 175 mm. Derartige Großmotoren kommen als Antriebsaggregate auf Schiffen oder in Kraftwerken zur Stromerzeugung zum Einsatz.In particular, the internal combustion engine is a so-called large engine or a large internal combustion engine with a piston diameter of more than 140 mm, in particular more than 175 mm. Such large engines are used as drive units on ships or in power plants to generate electricity.

Eine Brennkraftmaschine verfügt über ein Zylinderkurbelgehäuse, in dem eine Kurbelwelle gelagert ist.An internal combustion engine has a cylinder crankcase in which a crankshaft is mounted.

Ferner verfügt eine Brennkraftmaschine über mehrere Zylinder, die mindestens eine Zylinderbank ausbilden. Dann, wenn sämtliche Zylinder in Reihe positioniert sind, bilden dieselben eine Zylinderbank aus. Dann, wenn die Zylinder in V-Bauweise gruppiert sind, bilden die Zylinder zwei Zylinderbänke aus.Furthermore, an internal combustion engine has several cylinders that form at least one cylinder bank. Then, when all cylinders are positioned in series, they form a cylinder bank. Then, when the cylinders are grouped in a V-shape, the cylinders form two banks of cylinders.

Jeder Zylinder verfügt über einlassseitige Gaswechselventile und auslassseitige Gaswechselventile, die in einem Zylinderkopf des jeweiligen Zylinders aufgenommen sind.Each cylinder has gas exchange valves on the intake side and gas exchange valves on the exhaust side, which are accommodated in a cylinder head of the respective cylinder.

Ferner ist im jeweiligen Zylinderkopf eine Zündkerze aufgenommen, die dem Zünden eines im jeweiligen Zylinder der Brennkraftmaschine zu verbrennenden Kraftstoffs dient.Furthermore, a spark plug is accommodated in the respective cylinder head, which serves to ignite a fuel to be burned in the respective cylinder of the internal combustion engine.

Zur Betätigung der Gaswechselventile der Zylinder einer Brennkraftmaschine verfügt die Brennkraftmaschine über einen Ventiltrieb, wobei der Ventiltrieb für die Gaswechselventile eines jeden Zylinders Kipphebel umfasst, die in einem Kipphebelkasten des jeweiligen Zylinders aufgenommen sind.To operate the gas exchange valves of the cylinders of an internal combustion engine, the internal combustion engine has a valve train, the valve train for the gas exchange valves of each cylinder comprising rocker arms which are accommodated in a rocker arm box of the respective cylinder.

Fig. 1 bis 3 zeigen einen Ausschnitt aus einer Brennkraftmaschine im Bereich eines Zylinders, nämlich im Bereich eines Kipphebelkastens 10 des jeweiligen Zylinders, wobei vom Kipphebelkasten 10 ein oberer Abschnitt desselben gezeigt ist. Fig. 1 to 3 show a section of an internal combustion engine in the area of a cylinder, namely in the area of a rocker arm box 10 of the respective cylinder, an upper section of the rocker arm box 10 being shown.

Mit dem jeweiligen Kipphebelkasten 10 wirkt ein Kipphebeldeckel 11 zusammen, der am Kipphebelkasten 10 um eine Drehachse 12 schwenkbar gelagert ist. Durch Verschwenken des Kipphebeldeckels 11 zum Kipphebelkasten 10 kann der Zugriff auf den Kipphebelkasten 10 sowie auf im Kipphebelkasten 10 positionierte Baugruppen, wie zum Beispiel die Kipphebel, freigegeben werden, um zum Beispiel ein Ventilspiel an den Gaswechselventilen des jeweiligen Zylinders einzustellen.A rocker arm cover 11 interacts with the respective rocker arm box 10 and is pivotally mounted on the rocker arm box 10 about an axis of rotation 12. By pivoting the rocker arm cover 11 to the rocker arm box 10, access to the rocker arm box 10 as well as to assemblies positioned in the rocker arm box 10, such as the rocker arms, can be released in order, for example, to set a valve clearance on the gas exchange valves of the respective cylinder.

Der Kipphebeldeckel 11 des jeweiligen Zylinders trägt eine Zündspule 13. Über die Zündspule 13 des jeweiligen Zylinders kann die Zündkerze des jeweiligen Zylinders mit elektrischer Energie versorgt werden, um den jeweiligen Kraftstoff zu zünden. In Fig. 1 und 2 ist eine Zündkerzenverlängerung 14 gezeigt, die sich ausgehend von der jeweiligen Zündkerze in Richtung auf die Zündspule 13 erstreckt, und zwar durch ein Schutzrohr 15, welches zwischen dem Zylinderkopf des Zylinders und dem Kipphebeldeckel 11 verläuft und sich demnach durch den Kipphebelkasten 10 erstreckt.The rocker arm cover 11 of the respective cylinder carries an ignition coil 13. The spark plug of the respective cylinder can be supplied with electrical energy via the ignition coil 13 of the respective cylinder in order to ignite the respective fuel. In Fig. 1 and 2 a spark plug extension 14 is shown, which extends from the respective spark plug in the direction of the ignition coil 13, namely through a protective tube 15, which runs between the cylinder head of the cylinder and the rocker arm cover 11 and therefore extends through the rocker arm box 10.

An einem oberen Ende dieses Schutzrohrs 15 ragt die Zündkerzenverlängerung 14 mit einem Ende 14a heraus, wobei über dieses aus dem Schutzrohr 15 herausragende Ende 14a der Zündkerzenverlängerung 14 die elektrische Kontaktierung der Zündkerze mit der Zündspule 13 erfolgt.At an upper end of this protective tube 15, the spark plug extension 14 protrudes with one end 14a, with the spark plug being electrically contacted with the ignition coil 13 via this end 14a of the spark plug extension 14 protruding from the protective tube 15.

Fig. 1 bis 3 kann entnommen werden, dass das obere Ende 14a der Zündkerzenverlängerung 14 in einem Stopfen 16 geführt ist, welcher der Positionssicherung der Zündkerzenverlängerung 14 im Schutzrohr 15 dient. Das Ende 14a der Zündkerzenverlängerung 14 steht gegenüber dem Stopfen 16 vor. Fig. 1 to 3 It can be seen that the upper end 14a of the spark plug extension 14 is guided in a plug 16, which serves to secure the position of the spark plug extension 14 in the protective tube 15. The end 14a of the spark plug extension 14 protrudes from the plug 16.

Der Kipphebeldeckel 11 weist an einem ersten Abschnitt 11a eine Einführhilfe 17 auf, in die beim schwenkenden Schließen des Kipphebeldeckels 11 das Schutzrohr 15 bzw. der Stopfen 16 einfädelt.The rocker arm cover 11 has an insertion aid 17 on a first section 11a, into which the protective tube 15 or the plug 16 is threaded when the rocker arm cover 11 is pivotingly closed.

Ferner umfasst der Kipphebeldeckel 11 an einem zweiten Abschnitt 11b eine weitere Einführhilfe 18, in die beim schwenkenden Schließen des Kipphebeldeckels 11 das aus dem Schutzrohr 15 bzw. aus dem Stopfen 16 herausragende Ende 14a der Zündkerzenverlängerung 14 einfädelt. Hierdurch kann dann automatisch und selbstzentrierend ein elektrischer Kontakt zwischen der Zündkerzenverlängerung 14 und der Zündspule 13 des jeweiligen Zylinders ausgebildet werden.Furthermore, the rocker arm cover 11 comprises a further insertion aid 18 on a second section 11b, into which the end 14a of the spark plug extension 14 protruding from the protective tube 15 or from the plug 16 is threaded when the rocker arm cover 11 is pivotingly closed. As a result, an electrical contact can then be formed automatically and self-centering between the spark plug extension 14 and the ignition coil 13 of the respective cylinder.

Gemäß Fig. 1 bis 3 ist der zweite Abschnitt 11b mit der zweiten Einführhilfe 18 innerhalb eines vom ersten Abschnitt 11a mit der ersten Einführhilfe 17 begrenzten Bereichs angeordnet. Dies ist besonders bevorzugt, um die selbstzentrierende Kontaktierung im Hochspannungspfad zwischen Zündkerze und Zündspule 13 bereitzustellen.According to Fig. 1 to 3 the second section 11b with the second insertion aid 18 is arranged within an area delimited by the first section 11a with the first insertion aid 17. This is particularly preferred in order to provide the self-centering contact in the high-voltage path between the spark plug and the ignition coil 13.

Der zweite Abschnitt 11b des Kipphebeldeckels 11, mit welchem das Ende 14a der Zündkerzenverlängerung 14 kontaktierbar ist, bildet einen Steckkontakt für das aus dem Schutzrohr 15 bzw. dem Stopfen 16 herausragende Ende 14a der Zündkerzenverlängerung 14 aus, wobei in diesem Steckkontakt eine elektrisch leitende Feder 19 positioniert ist, die auch im Hochspannungspfad angeordnet ist und demnach elektrischen Strom bzw. elektrische Spannung ausgehend von der Zündspule 13 in Richtung auf die Zündkerze überträgt.The second section 11b of the rocker arm cover 11, with which the end 14a of the spark plug extension 14 can be contacted, forms a plug contact for the end 14a of the spark plug extension 14 protruding from the protective tube 15 or the plug 16, with an electrically conductive spring 19 in this plug contact is positioned, which is also arranged in the high-voltage path and therefore transmits electrical current or electrical voltage starting from the ignition coil 13 in the direction of the spark plug.

Im in Fig. 1 und 2 gezeigten Ausführungsbeispiel erstreckt sich zwischen dem Steckkontakt für das Ende 14a der Zündkerzenverlängerung 14 und der Zündspule 13 ein Kabel 20. Im Unterschied hierzu ist es möglich, die Zündkerze 13 unmittelbar auf dem zweiten Abschnitt 11b bzw. dem Steckkontakt zu positionieren, wobei dann auf ein derartiges Kabel 20 verzichtet werden kann.Im in Fig. 1 and 2 In the exemplary embodiment shown, a cable 20 extends between the plug contact for the end 14a of the spark plug extension 14 and the ignition coil 13. In contrast to this, it is possible to position the spark plug 13 directly on the second section 11b or the plug contact, in which case this is the case Cable 20 can be dispensed with.

Die Erfindung erlaubt bei Brennkraftmaschinen mit Zündkerzen einen besonders einfachen Zugriff auf im Kipphebelkasten 10 aufgenommene Baugruppen.The invention allows particularly easy access to assemblies accommodated in the rocker arm box 10 in internal combustion engines with spark plugs.

BezugszeichenlisteReference symbol list

1010
KipphebelkastenRocker arm box
1111
KipphebeldeckelRocker cover
11a11a
AbschnittSection
11b11b
AbschnittSection
1212
DrehachseAxis of rotation
1313
Zündspuleignition coil
1414
ZündkerzenverlängerungSpark plug extension
14a14a
EndeEnd
1515
Schutzrohrprotective tube
1616
StopfenPlug
1717
EinführhilfeInsertion aid
1818
EinführhilfeInsertion aid
1919
FederFeather
2020
KabelCable

Claims (5)

  1. An internal combustion engine,
    having a cylinder crankcase in which a crankshaft is mounted,
    having at least one cylinder bank comprising multiple cylinders,
    wherein each cylinder comprises a spark plug for igniting a fuel to be combusted in the respective cylinder,
    wherein each cylinder comprises a cylinder head with at least one gas exchange valve on the inlet side and with at least one gas exchange valve on the exhaust side,
    wherein each cylinder comprises a rocker arm box (10) for receiving rocker arms of a valve drive for the gas exchange valves,
    wherein each cylinder comprises a rocker arm cover (11) which is pivotable relative to the respective rocker arm box (10),
    wherein the rocker arm cover (11) includes a first portion (11a) with a first introduction aid (17) and a second portion (11b) with a second introduction aid (18), and
    wherein the respective rocker arm cover (11) carries an ignition coil (13) for the spark plug of the respective cylinder, which is contactable with the spark plug via a spark plug extension (14) extending through a conduit (15) between the cylinder head and the rocker arm box (10) or the rocker arm cover (11) of the respective cylinder,
    characterised in that
    the conduit (15) threads into the first introduction aid (17) during the pivoting closing of the rocker arm cover (11), in that an end (14a) of the spark plug extension (14) protruding from the conduit (15) threads into the second introduction aid (18) during the pivoting closing of the rocker arm cover (11), in order to form in an automatic and self-centring manner an electrical contact between the spark plug extension (14) und the ignition coil (13) of the respective cylinder, and
    in that the second portion (11b) with the second introduction aid (18) is arranged within a region delimited from the first portion (11a) with the first introduction aid (17).
  2. The internal combustion engine according to Claim 1, characterised in that the end (14a) of the spark plug extension (14) protruding from the conduit (15) is guided in a plug (16), which upon the closing of the rocker arm cover (11) threads into the first introduction aid (17).
  3. The internal combustion engine according to Claim 2, characterised in that an end (14a) of the spark plug extension (14) protruding from the plug (16) threads into the second introduction aid (18) during the closing of the rocker arm cover (11).
  4. The internal combustion engine according to anyone of the Claims 1 to 3 characterised in that the second portion (11b) forms an electrical plug contact for the end (14a) of the spark plug extension (14) protruding from the conduit (15).
  5. The internal combustion engine according to Claim 4, characterised in that the electrical plug contact includes an electrically conductive spring (19) .
EP20178659.7A 2019-09-04 2020-06-08 Combustion engine Active EP3789608B1 (en)

Applications Claiming Priority (1)

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DE102019123721.1A DE102019123721B4 (en) 2019-09-04 2019-09-04 Rocker arm cover with spark plug contacts for an internal combustion engine

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JP (1) JP7479986B2 (en)
KR (1) KR102657292B1 (en)
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AT523774A2 (en) * 2020-05-07 2021-11-15 Man Energy Solutions Se Contacting device of a voltage transmission device of an ignition device of a large engine, spark plug, ignition device and large engine

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KR20210028568A (en) 2021-03-12
US20210087998A1 (en) 2021-03-25
JP7479986B2 (en) 2024-05-09
EP3789608A1 (en) 2021-03-10
CN112443420B (en) 2024-04-26
KR102657292B1 (en) 2024-04-12
CN112443420A (en) 2021-03-05
DE102019123721A1 (en) 2021-03-04
US11181071B2 (en) 2021-11-23
JP2021038747A (en) 2021-03-11
DE102019123721B4 (en) 2021-09-30

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