DE102011011980A1 - Device for volumetric ignition of air/fuel mixtures, has metal element designed as microwave antenna and extending into combustion chamber of internal combustion engine via electrically insulating feedthrough - Google Patents

Device for volumetric ignition of air/fuel mixtures, has metal element designed as microwave antenna and extending into combustion chamber of internal combustion engine via electrically insulating feedthrough Download PDF

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Publication number
DE102011011980A1
DE102011011980A1 DE201110011980 DE102011011980A DE102011011980A1 DE 102011011980 A1 DE102011011980 A1 DE 102011011980A1 DE 201110011980 DE201110011980 DE 201110011980 DE 102011011980 A DE102011011980 A DE 102011011980A DE 102011011980 A1 DE102011011980 A1 DE 102011011980A1
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Germany
Prior art keywords
combustion chamber
metal element
air
electrically insulating
microwave antenna
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DE201110011980
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German (de)
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Rainer Schmidt
Ilona Schmidt
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Individual
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Individual
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    • 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
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • F02P23/045—Other physical ignition means, e.g. using laser rays using electromagnetic microwaves

Abstract

The device has a cylinder (1), piston (2) and a cylinder head (3) forming a combustion chamber (6). A metal element (5) is designed as a microwave antenna, and extends into the combustion chamber of an internal combustion engine via an electrically insulating feedthrough (4). The metal element is connected with a microwave generator (7). Ionization-promoting additives are in form of graphite or metal atoms and attached to an air/fuel mixture. The piston is moved along a direction of the cylinder head in the combustion chamber, and compresses the air-fuel mixture.

Description

Bekannt und beschrieben sind Zündanlagen für Kraftstoff-Luftgemische, beispielhaft in DE 10 2006 037 412 A1 , bei denen mittels Verwendung einer Zündkerze, durch Anlegen einer Hochspannung, ein Funkenüberschlag erzeugt wird.Are known and described ignition systems for fuel-air mixtures, exemplified in DE 10 2006 037 412 A1 in which by means of use of a spark plug, by applying a high voltage, a sparkover is generated.

Nachteilig für den Zündverlauf ist bei derartigen Einrichtungen, dass eine quasi punktförmige Initialisierung des Verbrennungsvorganges ausgelöst wird und der Verlauf des Verbrennungsvorganges und die zeitliche Abfolge der Verbrennung eine stoffabhängige Zeitspanne in Anspruch nimmt, die einer möglichst optimalen Nutzung des Energiegehalts entgegen steht.A disadvantage of the ignition process is in such devices that a quasi-point initialization of the combustion process is triggered and the course of the combustion process and the chronological sequence of the combustion takes a substance-dependent period of time, which precludes optimal use of the energy content.

Weitere Zündsysteme sind beispielsweise in DE 10 2004 039 406 A1 beschrieben, bei denen mittels HF-Gasentladungen ein Plasmakanal zwischen Zündelement und dem Verbrennungsraum, unter Anwendung einer Hilfsentladung, erzeugt wird. Auch hierbei gelten ggf. in eingeschränkter Form die bereits oben angeführten Nachteile derartiger Vorrichtungen.Other ignition systems are for example in DE 10 2004 039 406 A1 described, in which by means of RF gas discharges, a plasma channel between the ignition element and the combustion chamber, using an auxiliary discharge, is generated. Here, too, the limited disadvantages of the above-mentioned disadvantages of such devices may apply.

Bekannt sind ebenfalls Vorrichtungen zur Zündung eines Kraftstoff-Luftgemisches, beispielhaft dargestellt in DE 10 2008 044 031 A1 , bei denen unter Verwendung von mindestens zwei Laserimpulsen oder zwei Laserstrahlen mindestens zwei Flammenkerne erzeugt werden, die sich räumlich überlappen und einen gemeinsamen Flammenkern bilden. Auch hierfür gelten die bereits angeführten Nachteile für derartige Vorrichtungen. Weiterhin sind hierfür bestimmte Umgebungsbedingungen bezüglich der Reinheit zu realisieren, um derartige optische Elemente zum Einsatz bringen zu können.Also known are devices for igniting a fuel-air mixture, exemplified in DE 10 2008 044 031 A1 in which at least two flame kernels are generated using at least two laser pulses or two laser beams, which spatially overlap and form a common flame kernel. Again, the already mentioned disadvantages apply to such devices. Furthermore, for this purpose, certain environmental conditions with regard to the purity are to be realized in order to be able to use such optical elements.

Aufgabe der erfindungsgemäßen Volumenzündung von Kraftstoff-Luftgemischen soll es folglich sein, die Nachteile bekannter Lösungen zu minimieren bzw. zu besetigen um die Energieeffizienz von Verbrennungskraftmaschinen wesentlich zu verbessern.The object of the volume ignition of fuel-air mixtures according to the invention should therefore be to minimize or overcome the disadvantages of known solutions in order to substantially improve the energy efficiency of internal combustion engines.

Eine Lösung für eine Volumenzündung von Kraftstoff-Luftgemischen ist in beispielhafter Ausführung in der 1 dargestellt.A solution for a volume ignition of fuel-air mixtures is exemplified in the 1 shown.

Hierbei wird mittels eines Zylinders 1, eines Kolbens 2 und eines die Steuerelemente für den Gaswechsel aufnehmenden Zylinderkopfes 3 der klassische Verbrennungsraum für einen Verbrennungsmotor geschaffen. Mittels einer elektrisch isolierenden Durchführung 4 wird ein Metallelement 5 in den Verbrennungsraum 6 geführt, wobei das Metallelement 5 mit einem Mikrowellengenerator 7 in Verbindung steht.This is done by means of a cylinder 1 , a piston 2 and a cylinder head control receiving the gas exchange controls 3 created the classic combustion chamber for an internal combustion engine. By means of an electrically insulating bushing 4 becomes a metal element 5 in the combustion chamber 6 guided, wherein the metal element 5 with a microwave generator 7 communicates.

In 2 ist zur 1 funktional der gleiche Sachverhalt dargestellt. Unterschiede bestehen hier lediglich in der Darstellung der beispielhaften Ausführung des Metallelementes 5.In 2 is to 1 functionally represented the same facts. Differences exist only in the representation of the exemplary embodiment of the metal element 5 ,

Im Falle des Arbeitstaktes bewegt sich in der dargestellten Anordnung der Kolben 2 in Richtung des Zylinderkopfes 3 und verdichtet das im Verbrennungsraum 6 befindliche Kraftstoff-Luftgemisch. Zu einem geeigneten Zeitpunkt wird der Mikrowellensender 7 aktiviert und die von ihm erzeugten elektromagnetischen Schwingungen dem als Mikrowellenantenne wirkenden Metallelement 5 zugeführt. Dieses führt die Höchstfrequenzenergie dem Verbrennungsraum 6 zu, in dem es infolge vorhandener Kohlenwasserstoffverbindungen, Rußpartikel und ggf. Spuren von Metallverbindungen, die auch als Kraftstoffbeimengungen vorliegen können, zur volumenmäßigen Funkenbildung kommt. Durch die Entzündung an sehr vielen Punkten verbrennt das vorhandene Kraftstoff-Luftgemisch ohne Verzögerung und Ausbildung einer ausgeprägten Flammenfront. Damit wird die Nutzungszeit der freigesetzten Verbrennungsenergie gegenüber bekannten Vorgängen erheblich verlängert und der Wirkungsgrad derartiger Einrichtungen gesteigert.In the case of the power stroke moves in the illustrated arrangement, the piston 2 in the direction of the cylinder head 3 and compresses that in the combustion chamber 6 located fuel-air mixture. At an appropriate time, the microwave transmitter 7 activated and the electromagnetic vibrations generated by him acting as a microwave antenna metal element 5 fed. This leads the maximum frequency energy to the combustion chamber 6 in which there is voluminous sparking due to existing hydrocarbon compounds, soot particles and possibly traces of metal compounds, which may also be present as fuel admixtures. Due to the ignition at many points, the existing fuel-air mixture burns without delay and formation of a pronounced flame front. Thus, the useful life of the released combustion energy compared to known processes is considerably extended and the efficiency of such devices increased.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zylindercylinder
22
Kolbenpiston
33
Zylinderkopfcylinder head
44
Elektrisch isolierende DurchführungElectrically insulating bushing
55
Metallelementmetal element
66
Verbrennungsraumcombustion chamber
77
Mikrowellengeneratormicrowave generator

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • DE 102006037412 A1 [0001] DE 102006037412 A1 [0001]
  • DE 102004039406 A1 [0003] DE 102004039406 A1 [0003]
  • DE 102008044031 A1 [0004] DE 102008044031 A1 [0004]

Claims (4)

Volumenzündung von Kraftstoff-Luftgemischen, bestehend aus einem Zylinder 1, einem Kolben 2 und einem Zylinderkopf 3, die einen Verbrennungsraum 6 bilden, gekennzeichnet dadurch, dass in den Verbrennungsraum 6 einer Verbrennungskraftmaschine ein als Mikrowellenantenne ausgebildetes Metallelement 5, über eine elektrisch isolierende Durchführung 4, hineinreicht.Volume ignition of fuel-air mixtures, consisting of a cylinder 1 , a piston 2 and a cylinder head 3 holding a combustion chamber 6 form, characterized in that in the combustion chamber 6 an internal combustion engine designed as a microwave antenna metal element 5 , via an electrically insulating bushing 4 , reaches into it. Anspruch gemäß dem Punkt 1., dadurch gekennzeichnet, dass das Metallelement 5 mit einem Mikrowellengenerator 7 verbunden ist.Claim according to item 1, characterized in that the metal element 5 with a microwave generator 7 connected is. Anspruch gemäß der Punkte 1. und 2., gekennzeichnet dadurch, dass die geometrischen Abmessungen des gebildeten Verbrennungsraumes 6 sowie das als Mikrowellenantenne fungierenden Metallelements 5 und die durch den Mikrowellengenerator 7 erzeugte Energie nicht zwingend frequenzmäßig aufeinander abgestimmt sein müssen.Claim according to the points 1 and 2, characterized in that the geometric dimensions of the combustion chamber formed 6 and the metal element functioning as a microwave antenna 5 and by the microwave generator 7 generated energy does not necessarily have to be matched in terms of frequency with each other. Anspruch gemäß der Punkte 1. bis 3., gekennzeichnet dadurch, dass dem Kraftstoff-Luftgemisch ionisationsfördernde Zusatzstoffe, beispielhaft in Form von Graphit oder Metallatome, beigefügt werden.Claim according to the points 1 to 3, characterized in that the fuel-air mixture ionisationsfördernde additives, for example in the form of graphite or metal atoms, are attached.
DE201110011980 2011-02-22 2011-02-22 Device for volumetric ignition of air/fuel mixtures, has metal element designed as microwave antenna and extending into combustion chamber of internal combustion engine via electrically insulating feedthrough Withdrawn DE102011011980A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201110011980 DE102011011980A1 (en) 2011-02-22 2011-02-22 Device for volumetric ignition of air/fuel mixtures, has metal element designed as microwave antenna and extending into combustion chamber of internal combustion engine via electrically insulating feedthrough

Applications Claiming Priority (1)

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DE201110011980 DE102011011980A1 (en) 2011-02-22 2011-02-22 Device for volumetric ignition of air/fuel mixtures, has metal element designed as microwave antenna and extending into combustion chamber of internal combustion engine via electrically insulating feedthrough

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039406A1 (en) 2004-08-13 2006-02-23 Siemens Ag Plasma ignition method and apparatus for igniting fuel / air mixtures in internal combustion engines
DE102006037412A1 (en) 2006-08-10 2008-02-14 Ford Global Technologies, LLC, Dearborn Ignition process for fuel-air mixture involves increasing electrode gap as engine temperature rises up to boundary temperature and decreasing it thereafter
DE102008044031A1 (en) 2008-11-24 2010-05-27 Robert Bosch Gmbh Method for igniting air-fuel mixture in combustion chamber of internal-combustion engine of vehicle or generator, involves carrying-out ignition of air-fuel mixture in combustion chamber through laser impulse train

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039406A1 (en) 2004-08-13 2006-02-23 Siemens Ag Plasma ignition method and apparatus for igniting fuel / air mixtures in internal combustion engines
DE102006037412A1 (en) 2006-08-10 2008-02-14 Ford Global Technologies, LLC, Dearborn Ignition process for fuel-air mixture involves increasing electrode gap as engine temperature rises up to boundary temperature and decreasing it thereafter
DE102008044031A1 (en) 2008-11-24 2010-05-27 Robert Bosch Gmbh Method for igniting air-fuel mixture in combustion chamber of internal-combustion engine of vehicle or generator, involves carrying-out ignition of air-fuel mixture in combustion chamber through laser impulse train

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Effective date: 20130731