EP2715098B1 - Arrangement of a spark plug in a cylinder of an internal combustion engine of a vehicle - Google Patents
Arrangement of a spark plug in a cylinder of an internal combustion engine of a vehicle Download PDFInfo
- Publication number
- EP2715098B1 EP2715098B1 EP12727285.4A EP12727285A EP2715098B1 EP 2715098 B1 EP2715098 B1 EP 2715098B1 EP 12727285 A EP12727285 A EP 12727285A EP 2715098 B1 EP2715098 B1 EP 2715098B1
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- European Patent Office
- Prior art keywords
- spark plug
- cylinder
- inlet channels
- ground electrode
- combustion engine
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- 238000002485 combustion reaction Methods 0.000 title claims description 41
- 239000000919 ceramic Substances 0.000 claims description 15
- 239000012212 insulator Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
Images
Classifications
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/242—Arrangement of spark plugs or injectors
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- 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
- H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber
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- 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
- H01T13/16—Means for dissipating heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Die vorliegende Erfindung betrifft eine Anordnung einer Zündkerze in einem Zylinderkopf eines Zylinders eines Verbrennungsmotors eines Fahrzeuges.The present invention relates to an arrangement of a spark plug in a cylinder head of a cylinder of an internal combustion engine of a vehicle.
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Nach dem Stand der Technik ist eine Vorentflammung bekannt, bei welcher ein unkontrollierter Zündprozess der Zylinderladung mehr oder weniger deutlich vor dem geplanten Zündzeitpunkt auftritt. Durch die frühzeitige Umsetzung des Luft-Kraftstoff-Gemisches und der zusätzlichen Kompression kommt es dabei zu sehr hohen Zylinderdrücken. Durch den erhöhten thermischen Zustand nach Brennbeginn kommt es häufig zu einer Detonation mit anschließender klopfender Verbrennung. Das Zusammentreffen dieser Bedingungen kann bei einem Ottomotor zu einem Zylinderdruck von größer als 250 bar und damit zum sofortigen Ausfall des Motors führen.According to the prior art, pre-ignition is known in which an uncontrolled ignition process of the cylinder charge occurs more or less clearly before the planned ignition point. The early conversion of the air-fuel mixture and the additional compression result in very high cylinder pressures. Due to the increased thermal condition after the start of combustion, detonation with subsequent knocking combustion often occurs. The combination of these conditions can lead to a cylinder pressure of more than 250 bar in a gasoline engine and thus to the immediate failure of the engine.
Daher stellt sich die vorliegende Erfindung die Aufgabe, eine Anordnung einer Zündkerze in einem Zylinderkopf eines Zylinders einer Brennkraftmaschine bereitzustellen, bei der eine Vorentflammung seltener auftritt, als bei einem vergleichbaren Zylinderkopf eines Zylinders nach dem Stand der Technik.The object of the present invention is therefore to provide an arrangement of a spark plug in a cylinder head of a cylinder of an internal combustion engine in which pre-ignition occurs less frequently than in a comparable cylinder head of a cylinder according to the prior art.
Die erfindungsgemäße Anordnung einer Zündkerze in einem Zylinderkopf eines Zylinders eines Verbrennungsmotors ist durch die Merkmale im Anspruch 1 gekennzeichnet.The arrangement according to the invention of a spark plug in a cylinder head of a cylinder of an internal combustion engine is characterized by the features in
Die Zündkerze ist derart in dem Zylinderkopf des Zylinders befestigt, dass die Zündkerze bezüglich der beiden Einlasskanäle des Zylinders die Orientierung in dem vorgegebenen Orientierungsbereich (d. h. eine Ausrichtung des Zylinders in einem vorgegebenen Toleranzbereich (z. B. in einem Winkelbereich)) aufweist, um bei laufendem Verbrennungsmotor die Massenelektrode durch einen Luftstrom, welcher durch den oder durch die Einlasskanäle erzeugt wird, zu kühlen.The spark plug is fastened in the cylinder head of the cylinder in such a way that the spark plug is oriented in the specified orientation range (i.e. an alignment of the cylinder in a specified tolerance range (e.g. in an angular range)) with respect to the two intake ports of the cylinder in order to running internal combustion engine to cool the ground electrode by an air flow which is generated through or through the intake ports.
Das heißt, die Zündkerze wird derart in dem Zylinderkopf des Zylinders montiert oder angeordnet, dass der von den Einlasskanälen erzeugte Luftstrom die Massenelektrode unter Berücksichtigung von Toleranzen bei der Montage der Zündkerze möglichst optimal kühlt.This means that the spark plug is mounted or arranged in the cylinder head of the cylinder in such a way that the air flow generated by the intake ports cools the ground electrode as optimally as possible, taking tolerances into account when mounting the spark plug.
Mit anderen Worten, der Luftstrom, welcher von den Einlasskanälen im Betrieb des Verbrennungsmotors erzeugt wird, wird zur Kühlung der Massenelektrode der Zündkerze eingesetzt.In other words, the air flow generated by the intake ports during operation of the internal combustion engine is used to cool the ground electrode of the spark plug.
Um nun die optimale Orientierung der Zündkerze und damit der Massenelektrode zu ermitteln, in welcher die Massenelektrode von dem Luftstrom der Einlasskanäle am besten gekühlt wird, wurden zahlreiche Orientierungen dahingehend untersucht, wie heiß die Massenelektrode im Betrieb des Verbrennungsmotors jeweils wird. Zur Ermittlung der optimalen Orientierung der Zündkerze wurden Temperaturmessungen an der Zündkerze an einem optisch zugänglichen Motor durchgeführt, wobei eine spezielle Messtechnik (Infrarot-Thermometrie) eingesetzt wurde.In order to determine the optimal orientation of the spark plug and thus of the ground electrode, in which the ground electrode is best cooled by the air flow in the intake ports, numerous orientations were examined to determine how hot the ground electrode gets during operation of the internal combustion engine. To determine the optimal orientation of the spark plug, temperature measurements were carried out on the spark plug on an optically accessible engine, using a special measuring technique (infrared thermometry).
Die Erfinder haben erkannt, dass es für die Kühlung der Massenelektrode durch den Luftstrom der beiden Einlasskanäle vorteilhaft ist, die Zündkerze derart in dem Zylinderkopf des Zylinders zu befestigen oder zu montieren, dass ein offenes Ende der Massenelektrode im Wesentlichen (das heißt mit einer vorbestimmten Toleranz) in Richtung der beiden Einlasskanäle angeordnet ist.The inventors have recognized that it is advantageous for the cooling of the ground electrode by the air flow of the two intake ports to fasten or mount the spark plug in the cylinder head of the cylinder in such a way that an open end of the ground electrode is substantially (i.e. with a predetermined tolerance ) is arranged in the direction of the two intake ports.
Anders ausgedrückt wird die Zündkerze derart in dem Zylinder montiert, dass das offene Ende der Massenelektrode derart zu den beiden Einlasskanälen gerichtet ist, dass der über die beiden Einlasskanäle einströmende Luftstrom auf das offene Ende der Massenelektrode auftrifft und diese dadurch kühlt.In other words, the spark plug is mounted in the cylinder in such a way that the open end of the ground electrode faces the two intake ports in such a way that the airflow flowing in via the two intake ports impinges on the open end of the ground electrode and thereby cools it.
Die Erfinder haben zwei unterschiedliche Varianten untersucht. Bei der ersten Variante wurde das offene Ende der Massenelektrode in Richtung der Einlassventile und bei der zweiten Variante in der Richtung der Auslassventile angeordnet. Bei der anschließenden Temperaturmessung wies bei der zweiten Variante die heißeste Stelle der Massenelektrode, welche sich meist am offenen Ende der Massenelektrode befindet, eine um 40 bis 60°C höhere Temperatur auf als die Temperatur der heißesten Stelle der Massenelektrode bei der ersten Variante. Daher reduziert die gezielte Einbaulage der Zündkerze mit einer Ausrichtung der Massenelektrode in Richtung der Einlassventile (Einlasskanäle) die Temperatur an der Massenelektrode vorteilhafterweise erheblich, wodurch die maximale Temperatur der Zündkerze und dadurch die Häufigkeit von Vorentflammungen wesentlich abgesenkt werden kann.The inventors examined two different variants. In the first variant, the open end of the ground electrode was placed in the direction of the intake valves and in the second variant in the direction of the exhaust valves. In the subsequent temperature measurement, the hottest point of the ground electrode, which is usually located at the open end of the ground electrode, was 40 to 60°C higher in the second variant than the temperature of the hottest point of the ground electrode in the first variant. Therefore, the targeted installation position of the spark plug with an orientation of the ground electrode in the direction of the intake valves (intake ports) advantageously reduces the temperature at the ground electrode considerably, as a result of which the maximum temperature of the spark plug and thus the frequency of pre-ignition can be significantly reduced.
Das heißt, das offene Ende der Massenelektrode wird unter Berücksichtigung der Toleranz zwischen die beiden Einlasskanäle gerichtet. Die Toleranz beträgt vorteilhafterweise höchstens ±90°, besser ±45° und am besten ±5°. Wenn die Toleranz ±90° (±45° bzw. ±5°) beträgt, wird die Zündkerze bei der Montage derart um ihre Längsmittelachse gedreht, dass sie bezüglich der optimalen Ausrichtung, bei welcher das offene Ende der Massenelektrode zwischen die beiden Einlasskanäle gerichtet ist, maximal um 90° (45° bzw. 5°) im Uhrzeigersinn oder maximal um 90° (45° bzw. 5°) entgegen des Uhrzeigersinns verdreht ist. Mit genau zwischen den beiden Einlasskanälen ist dabei insbesondere ein Punkt gemeint, welcher sich zwischen den beiden Einlasskanälen auf einer Geraden befindet, welche die Mitte des Austritts des einen Einlasskanals in den Brennraum mit der Mitte des Austritts des anderen Einlasskanals in den Brennraum verbindet. Dabei weist dieser Punkt denselben Abstand von der Mitte des Austritts des einen Einlasskanals von der Mitte des Austritts des anderen Einlasskanals auf.That is, the open end of the ground electrode is directed between the two intake ports, considering the tolerance. The tolerance is advantageously at most ±90°, more preferably ±45° and most preferably ±5°. If the tolerance is ±90° (±45° or ±5°), the spark plug is rotated about its longitudinal central axis during assembly in such a way that it is in relation to the optimum orientation, in which the open end of the ground electrode is directed between the two intake ports , rotated a maximum of 90° (45° or 5°) clockwise or a maximum of 90° (45° or 5°) counterclockwise. Exactly between the two intake ports means in particular a point which is located between the two intake ports on a straight line which connects the center of the exit of one intake port into the combustion chamber with the center of the exit of the other intake port into the combustion chamber. In this case, this point has the same distance from the center of the outlet of one inlet channel to the center of the outlet of the other inlet channel.
Der Zylinder umfasst Mittel, um die Zündkerze in dem Zylinder anzuordnen, so dass das offene Ende der Massenelektrode unter Berücksichtigung der Toleranz in Richtung der beiden Einlasskanäle angeordnet ist.The cylinder includes means for locating the spark plug in the cylinder so that the open end of the ground electrode is located towards the two intake ports, taking into account the tolerance.
Die Mittel bestehen darin, dass der Zylinder, insbesondere der Zylinderkopf, das Montageloch mit Innengewinde umfasst, welches zur Aufnahme der Zündkerze ausgestaltet ist. Dabei umfasst die Zündkerze ein Außengewinde, welches derart an das Innengewinde angepasst ist, dass das offene Ende der Massenelektrode der Zündkerze nach der Montage, bei welcher die Zündkerze mit einem vorbestimmten Drehmoment in das Innengewinde geschraubt und mit der vorbestimmten Toleranz in die vorbestimmte Richtung zwischen den Einlasskanälen ausgerichtet wird.The means consist in the cylinder, in particular the cylinder head, comprising the internally threaded mounting hole which is designed to receive the spark plug. The spark plug includes an external thread which is adapted to the internal thread in such a way that the open end of the ground electrode of the spark plug after assembly, in which the spark plug is screwed into the internal thread with a predetermined torque and with the predetermined tolerance is aligned in the predetermined direction between the intake ports.
In vorteilhafter Weise wird dadurch bewirkt, dass die Massenelektrode der Zündkerze bei laufendem Verbrennungsmotor durch die von den beiden Einlasskanälen erzeugten Luftströme möglichst optimal gekühlt wird.This advantageously has the effect that the ground electrode of the spark plug is cooled as optimally as possible when the internal combustion engine is running by the air flows generated by the two inlet channels.
Zur Anordnung der Zündkerze ist vorgesehen, dass die Zündkerze durch eine Drehung um die Mittellängsachse (oder Längsmittelachse) der Zündkerze in dem Zylinder angebracht wird. Das heißt, die Zündkerze wird durch die Drehung um die Mittellängsachse in den Zylinder, insbesondere den Zylinderkopf geschraubt. Dabei wird die Zündkerze derart in eine Endstellung gedreht, dass das offene Ende der Massenelektrode unter Berücksichtigung der Toleranz zwischen die Einlasskanäle weist.In order to arrange the spark plug, it is provided that the spark plug is fitted in the cylinder by rotation about the central longitudinal axis (or longitudinal central axis) of the spark plug. This means that the spark plug is screwed into the cylinder, in particular the cylinder head, by rotating it about the central longitudinal axis. The spark plug is turned into an end position in such a way that the open end of the ground electrode points between the inlet channels, taking into account the tolerance.
Es wird bevorzugt eine Zündkerze bereitgestellt, bei der das Gewinde derart ausgestaltet ist, dass das Profil der Oberfläche des Gewindes gewalzt ist. Dieses Gewinde wird erzeugt, indem ein Werkstück unter enormer Krafteinwirkung zwischen zwei sich drehenden Rollwerkzeugen verformt wird. Durch das Eindringen der Rollwerkzeugprofile in die Werkstückoberfläche wird das Material in kaltem Zustand bis in den Grund der Gewinderollwerkzeuge gedrückt und so bis auf das Nennmaß aufgerollt. Nach dem Walzen wird die Lage des Gewindes geprüft. Mit dem Wissen, wie das Gewinde an der jeweiligen Zündkerze ausgeführt ist, wird danach die Massenelektrode angebracht, insbesondere geschweißt.A spark plug is preferably provided in which the thread is designed in such a way that the profile of the surface of the thread is rolled. This thread is created by deforming a workpiece between two rotating rolling tools under enormous force. When the rolling tool profiles penetrate the surface of the workpiece, the cold material is pressed down to the base of the thread rolling tools and is thus rolled up to the nominal size. After rolling, the position of the thread is checked. With the knowledge of how the thread is designed on the respective spark plug, the ground electrode is then attached, in particular welded.
Es ist erfindungsgemäß vorgesehen, dass der Bund des Zündkerzenmetallgehäuses brennraumseitig so verlängert ist, dass der Zündkerzenbund mit der Zündkerzenkeramik abschließt oder etwas über die Zündkerzenkeramik heraussteht. Somit liegt die Zündkerzenkeramik als Isolator abgeschirmt im Gehäuse. Durch diese Auslegung wird die mögliche Funkenstrecke so verändert, dass bei hoher Ladungsbewegung eine mögliche Gleitentladung nicht über die Keramik stattfindet, sondern an das Metallgehäuse ausgelenkt wird. Dadurch wird eine sichere Entflammung des Gemisches gewährleistet und die Keramik ist durch diese sichere Entflammung geschützt, da die Keramik auf gleicher Höhe oder unterhalb des Zündkerzengehäuses liegt.It is provided according to the invention that the collar of the metal spark plug housing is extended on the combustion chamber side in such a way that the spark plug collar ends with the spark plug ceramic or protrudes slightly beyond the spark plug ceramic. Thus, the spark plug ceramic is shielded as an insulator in the housing. With this design, the possible spark gap is changed in such a way that with high charge movement, a possible creeping discharge does not take place via the ceramic, but is deflected to the metal housing. This ensures safe ignition of the mixture and the ceramic is protected by this safe ignition, since the ceramic is at the same level as or below the spark plug housing.
Darüber hinaus wird im Rahmen der vorliegenden Erfindung der Verbrennungsmotor für das Fahrzeug mit der zuvor erläuterten Anordnung der Zündkerze bereitgestellt. Das Fahrzeug umfasst den zuvor genannten Verbrennungsmotor.In addition, in the present invention, the internal combustion engine for the vehicle having the arrangement of the spark plug explained above is provided. The vehicle includes the aforementioned internal combustion engine.
Im Rahmen von Untersuchungen zur Vorentflammung konnte ein klarer Trend beobachtet werden. Je kälter die Zündkerze ist, desto geringer ist die Häufigkeit, mit welcher Vorentflammungen in einem Betriebspunkt auftreten.A clear trend was observed in pre-ignition studies. The colder the spark plug, the lower the frequency with which pre-ignition occurs at an operating point.
Es wurde erkannt, dass die Zündkerze das heißeste Bauteil im Brennraum ist und somit eine Vorentflammung unterstützt. In der gesamten Ansaug- und Verdichtungsphase wird Wärme von der heißen Zündkerze auf das kältere Kraftstoff-Luft-Gemisch übertragen.It was recognized that the spark plug is the hottest component in the combustion chamber and thus supports pre-ignition. Throughout the intake and compression phase, heat is transferred from the hot spark plug to the colder fuel-air mixture.
Durch die Anordnung der Zündkerze in dem Zylinder werden die Temperaturen im gesamten Betriebskennfeld reduziert. Diese Temperaturabsenkung reduziert neben der Wahrscheinlichkeit einer Vorentflammung auch die Empfindlichkeit gegenüber Glühentzündungen, thermischer Überlastung und resultierenden Zündkerzenschäden.The arrangement of the spark plug in the cylinder reduces the temperatures in the entire operating map. In addition to reducing the likelihood of pre-ignition, this temperature reduction also reduces the sensitivity to glow ignition, thermal overload and the resulting spark plug damage.
Zusammenfassend weist die vorliegende Erfindung insbesondere den Vorteil auf, dass die Wahrscheinlichkeit des Auftretens einer Vorentflammung verringert wird. Darüber hinaus wird die thermische Belastung der Zündkerze in vorteilhafter Weise gesenkt und somit die Haltbarkeit der Zündkerze verlängert.In summary, the present invention has the particular advantage of reducing the likelihood of pre-ignition occurring. In addition, the thermal load on the spark plug is reduced in an advantageous manner and the service life of the spark plug is thus extended.
Die vorliegende Erfindung ist zum Einsatz in Verbrennungsmotoren von Kraftfahrzeugen, insbesondere Personenkraftwagen, Lastkraftwagen, Schiffen, Flugzeugen sowie gleisgebundenen Kraftfahrzeugen oder spurgeführten Kraftfahrzeugen, geeignet.The present invention is suitable for use in internal combustion engines of motor vehicles, in particular passenger cars, trucks, ships, airplanes and track-bound motor vehicles or track-guided motor vehicles.
Im Folgenden wird die vorliegende Erfindung anhand der
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Fig. 1 stellt einen Zylinderkopf aus dem Zylinderinnenraum gesehen dar. -
Fig. 2 stellt einen Schnitt durch den Zylinderkopf gemäß derSchnittlinie 6 inFig. 1 dar. -
Fig. 3 stellt eine Zündkerze dar. -
Fig. 4 stellt ein Fahrzeug mit einem erfindungsgemäßen Verbrennungsmotor dar.
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1 represents a cylinder head seen from the cylinder interior. -
2 represents a section through the cylinder head according tosection line 6 in1 represent. -
3 represents a spark plug. -
4 represents a vehicle with an internal combustion engine according to the invention.
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Es wurde erkannt, dass die Zündkerze das heißeste Bauteil im Brennraum ist und somit eine Vorentflammung unterstützt. In der gesamten Ansaug- und Verdichtungsphase wird Wärme von der heißen Zündkerze auf das kältere Kraftstoff-Luft-Gemisch übertragen.It was recognized that the spark plug is the hottest component in the combustion chamber and thus supports pre-ignition. Throughout the intake and compression phase, heat is transferred from the hot spark plug to the colder fuel-air mixture.
Durch die erfindungsgemäße Anordnung der Zündkerze in dem Zylinder werden die Temperaturen im gesamten Betriebskennfeld reduziert. Diese Temperaturabsenkung reduziert neben der Wahrscheinlichkeit einer Vorentflammung auch die Empfindlichkeit gegenüber Glühentzündungen, thermischer Überlastung und resultierenden Zündkerzenschäden.The arrangement of the spark plug in the cylinder according to the invention reduces the temperatures in the entire operating map. In addition to reducing the likelihood of pre-ignition, this temperature reduction also reduces the sensitivity to glow ignition, thermal overload and the resulting spark plug damage.
Zusammenfassend weist die vorliegende Erfindung insbesondere den Vorteil auf, dass die Wahrscheinlichkeit des Auftretens einer Vorentflammung verringert wird. Darüber hinaus wird die thermische Belastung der Zündkerze in vorteilhafter Weise gesenkt und somit die Haltbarkeit der Zündkerze verlängert.In summary, the present invention has the particular advantage of reducing the likelihood of pre-ignition occurring. In addition, the thermal load on the spark plug is reduced in an advantageous manner and the service life of the spark plug is thus extended.
Die vorliegende Erfindung ist zum Einsatz in Verbrennungsmotoren von Kraftfahrzeugen, insbesondere Personenkraftwagen, Lastkraftwagen, Schiffen, Flugzeugen sowie gleisgebundenen Kraftfahrzeugen oder spurgeführten Kraftfahrzeugen, geeignet.The present invention is suitable for use in internal combustion engines of motor vehicles, in particular passenger cars, trucks, ships, airplanes and track-bound motor vehicles or track-guided motor vehicles.
Im Folgenden wird die vorliegende Erfindung anhand der
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Claims (4)
- Arrangement of a spark plug (1) in a cylinder head of a cylinder (7) of an internal combustion engine (8) for a vehicle (10), the cylinder (7) comprising exactly two inlet channels (4) and the spark plug (1) which is arranged in the cylinder (7) and has a ground electrode (2) having an open end (3), the cylinder (7) comprising an assembly hole having an internal thread for receiving the spark plug (1) and the spark plug (1) comprising an external thread, the spark plug (1) being fastened in the cylinder head of the cylinder (7) such that the spark plug (1) has an orientation in a predetermined orientation range with respect to the exactly two inlet channels (4) in order to cool the ground electrode (2) by means of a generated air flow of at least one of the inlet channels (4) during operation of the internal combustion engine (8), the spark plug (1) being mounted in the cylinder head of the cylinder (7) such that the spark plug (1) is attached symmetrically in the center of the exactly two inlet channels (4), the open end (3) of the ground electrode (2) being aligned between the two inlet channels (4) at a point, the open end (3) of the ground electrode (2) being directed between the two inlet channels (4) with a tolerance in a range of ±90° to ±5° with respect to the optimal alignment taking into account tolerances during assembly and being twisted about the longitudinal central axis of the spark plug (1) so that the air streams flowing in via the inlet channels (4) hit the open end (3) of the ground electrode (2) and thereby cool said electrode, the point which is on a straight line between the two inlet channels (4) being defined between the two inlet channels (4), which straight line connects the center of an outlet of one inlet channel into the combustion chamber with the center of the outlet of the other inlet channel into the combustion chamber, the point having the same distance from the center of the outlet of one inlet channel as from the center of the outlet of the other inlet channel, the internal thread and the external thread of the spark plug (1) being matched to one another such that, after assembly when the spark plug (1) is screwed into the internal thread at a predetermined torque, the open end (3) of the spark plug (1) is aligned with respect to the two inlet channels (4) with the tolerance between the inlet channels (4), characterized in that a spark plug collar (12) of a spark plug metal housing is extended on the combustion chamber side such that the spark plug collar (12) terminates at least with a spark plug ceramic (14) or even projects slightly beyond the spark plug ceramic (14) so that the spark plug ceramic (14) is shielded as an insulator in the spark plug metal housing.
- Arrangement according to claim 1, characterized in that the profile of the surface of the thread (11) of the spark plug (1) is rolled.
- Internal combustion engine (8) for a vehicle (10) having an arrangement of a spark plug (1) in a cylinder head according to either claim 1 or claim 2.
- Vehicle (10) having an internal combustion engine (8) according to claim 3.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102011102620 | 2011-05-27 | ||
PCT/EP2012/002103 WO2012163479A1 (en) | 2011-05-27 | 2012-05-16 | Cylinder of an internal combustion engine for a vehicle, and corresponding production method, means for producing the cylinder, spark plug, internal combustion engine and vehicle |
Publications (2)
Publication Number | Publication Date |
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EP2715098A1 EP2715098A1 (en) | 2014-04-09 |
EP2715098B1 true EP2715098B1 (en) | 2023-07-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12727285.4A Active EP2715098B1 (en) | 2011-05-27 | 2012-05-16 | Arrangement of a spark plug in a cylinder of an internal combustion engine of a vehicle |
Country Status (6)
Country | Link |
---|---|
US (1) | US9556820B2 (en) |
EP (1) | EP2715098B1 (en) |
CN (1) | CN103562534B (en) |
DE (1) | DE102012009506A1 (en) |
RU (1) | RU2572735C2 (en) |
WO (1) | WO2012163479A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018111636A1 (en) * | 2018-05-15 | 2019-11-21 | Webasto SE | Evaporator assembly for mobile heaters |
CN109578161A (en) * | 2019-01-03 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of Ignition Natural Gas Engine spark plug mounting structure |
DE102019218408A1 (en) * | 2019-11-27 | 2021-02-25 | Mtu Friedrichshafen Gmbh | Method of operating a spark plug device and spark plug device |
Citations (1)
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DE3939322C2 (en) * | 1988-11-30 | 1994-09-15 | Fuji Heavy Ind Ltd | Spark plug arrangement in an internal combustion engine with an overhead camshaft |
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JP3763491B2 (en) * | 1996-10-08 | 2006-04-05 | 富士重工業株式会社 | Combustion chamber structure of in-cylinder injection engine |
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JP5479965B2 (en) * | 2010-03-23 | 2014-04-23 | 本田技研工業株式会社 | Spark plug cooling device for vehicle engine |
-
2012
- 2012-05-14 DE DE102012009506A patent/DE102012009506A1/en not_active Withdrawn
- 2012-05-16 EP EP12727285.4A patent/EP2715098B1/en active Active
- 2012-05-16 CN CN201280025788.0A patent/CN103562534B/en active Active
- 2012-05-16 WO PCT/EP2012/002103 patent/WO2012163479A1/en active Application Filing
- 2012-05-16 RU RU2013158348/06A patent/RU2572735C2/en active
-
2013
- 2013-11-22 US US14/088,276 patent/US9556820B2/en active Active
Patent Citations (1)
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DE3939322C2 (en) * | 1988-11-30 | 1994-09-15 | Fuji Heavy Ind Ltd | Spark plug arrangement in an internal combustion engine with an overhead camshaft |
Also Published As
Publication number | Publication date |
---|---|
RU2013158348A (en) | 2015-07-10 |
CN103562534B (en) | 2018-05-18 |
DE102012009506A1 (en) | 2012-11-29 |
US9556820B2 (en) | 2017-01-31 |
WO2012163479A1 (en) | 2012-12-06 |
CN103562534A (en) | 2014-02-05 |
EP2715098A1 (en) | 2014-04-09 |
US20140076261A1 (en) | 2014-03-20 |
RU2572735C2 (en) | 2016-01-20 |
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