DE102004031806A1 - Ion current signal analyzing method for internal combustion engine, involves comparing amplitude of single cycles of ion current signals with threshold value and considering only signals whose amplitudes lie above value for further analysis - Google Patents
Ion current signal analyzing method for internal combustion engine, involves comparing amplitude of single cycles of ion current signals with threshold value and considering only signals whose amplitudes lie above value for further analysis Download PDFInfo
- Publication number
- DE102004031806A1 DE102004031806A1 DE200410031806 DE102004031806A DE102004031806A1 DE 102004031806 A1 DE102004031806 A1 DE 102004031806A1 DE 200410031806 DE200410031806 DE 200410031806 DE 102004031806 A DE102004031806 A DE 102004031806A DE 102004031806 A1 DE102004031806 A1 DE 102004031806A1
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- Germany
- Prior art keywords
- ion current
- evaluation
- current signal
- signal
- cycles
- 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.)
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Classifications
-
- 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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/021—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an ionic current sensor
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Auswertung eines Ionenstromsignals nach dem Oberbegriff des Patentanspruchs 1, zugehörige Vorrichtung und Verbrennungsregelungsverfahren für eine Brennkraftmaschine.The The invention relates to a method for evaluating an ion current signal according to the preamble of claim 1, associated apparatus and Combustion control method for an internal combustion engine.
Die Lage des Verbrennungsschwerpunktes bestimmt maßgeblich den Wirkungsgrad eine Brennkraftmaschine. Durch Hilfe der Ionenstrommessung kann der Verbrennungsschwerpunkt bestimmt und die Lage des Verbrennungsschwerpunktes und damit die Verbrennung der Brennkraftmaschine geregelt werden.The Location of the center of combustion determines significantly the efficiency of a Internal combustion engine. By means of the ion current measurement, the focus of combustion can determined and the location of the combustion center and thus the Combustion of the internal combustion engine are regulated.
Die
Offenlegungsschrift
Aufgabe der Erfindung ist es, ein Verfahren zur Auswertung eines Ionenstromsignals anzugeben, das einfach aufgebaut ist und leicht in eine Brennkraftmaschine implementiert werden kann, sowie eine zugehörige Vorrichtung zur Auswertung eines Ionenstromsignals und ein Verbrennungsregelungsverfahren für eine Brennkraftmaschine zur Verfügung zu stellen.task The invention is a method for evaluating an ion current signal specify that is simple and easy in an internal combustion engine can be implemented, and an associated device for evaluation an ion current signal and a combustion control method for an internal combustion engine available too put.
Die Erfindung löst diese Aufgabe durch Bereitstellung eines Verfahrens zur Auswertung eines Ionenstromsignals mit den Merkmalen des Patentanspruchs 1, durch eine Vorrichtung zur Auswertung eines Ionenstromsignals mit den Merkmalen des Patentanspruchs 8 und durch ein Verbrennungsregelungsverfahren für eine Brennkraftmaschine mit den Merkmalen des Patentanspruchs 7.The Invention solves this task by providing a method for evaluation an ion current signal having the features of claim 1, by a device for evaluating an ion current signal with the features of claim 8 and by a combustion control method for one Internal combustion engine having the features of patent claim 7.
Vorteilhafte Ausführungsformen und Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.advantageous embodiments and further developments of the invention are specified in the dependent claims.
Erfindungsgemäß werden beim Verfahren zur Auswertung eines Ionenstromssignals Einzelzyklen des Ionenstromsignals erfasst und bei der weiteren Auswertung werden nur Ionenstromzyklen berücksichtigt, deren Signalamplituden über einem vorgegebenen Schwellwert liegen. Dadurch ist es in vorteilhafter Weise möglich, durch einen einfachen Vergleich mit einem Schwellwert ohne eine aufwendige Plausibilitätsprüfung die Datenmenge für die weitere Auswertung zu reduzieren.According to the invention in the method for evaluating an ion current signal single cycles the ion current signal detected and in the further evaluation considers only ion current cycles, their signal amplitudes over a predetermined threshold. This makes it more advantageous Way possible, by a simple comparison with a threshold without one elaborate plausibility check the Amount of data for to reduce the further evaluation.
In Ausgestaltung des erfindungsgemäßen Auswerteverfahrens werden die erfassten Ionenstromsignale, deren Amplitude über dem vorgegebenen Schwellwert liegen einer gleitenden Mittelwertbildung unterzogen. Durch die gleitende Mittelwertbildung werden in vorteilhafter Weise Schwankungen bei der Verbrennung und des daraus resultierenden Ionenstroms berücksichtigt und ausgeglichen.In Embodiment of the evaluation method according to the invention become the detected ion current signals whose amplitude above the given threshold value are a moving averaging subjected. By the moving averaging are in an advantageous Way variations in combustion and the resulting ion current considered and balanced.
In weiterer Ausgestaltung des Auswerteverfahrens wird das gemittelte Ionenstromsignal integriert und normiert.In Another embodiment of the evaluation is the averaged Ion current signal integrated and normalized.
In weiterer Ausgestaltung wird der 50%-Umsatzpunkt berechnet.In In another embodiment, the 50% conversion point is calculated.
Der vorgegebene Schwellwert für die Signalamplitude des Ionenstromsignals beträgt beispielsweise 10μA und der gleitende Mittelwert wird vorzugsweise über zehn Zyklen gebildet.Of the predetermined threshold for the signal amplitude of the ion current signal is for example 10μA and the moving average is preferably formed over ten cycles.
Eine erfindungsgemäße Vorrichtung zur Auswertung des Ionenstromssignals in einer Brennkraftmaschine umfasst beispielsweise einen Sensor, der das Ionenstromsignal erfasst und eine Auswerte- und Steuereinheit, die den Ionenstromsensor zur Erfassung von Einzelzyklen des Ionenstromsignals ansteuert und die Signalamplituden der erfassten Einzelzyklen mit einem vorgegebenen Schwellwert vergleicht. Die Auswerte- und Steuereinheit berücksichtigt bei der weiteren Auswertung nur Ionenstromsignale, deren Amplitude über dem vorgegebenen Schwellwert liegen.A inventive device for evaluating the ion current signal in an internal combustion engine For example, it includes a sensor that detects the ion current signal and an evaluation and control unit, which the ion current sensor for Detection of individual cycles of the ion current signal drives and the Signal amplitudes of the detected individual cycles with a predetermined Threshold compares. The evaluation and control unit is taken into account in the further evaluation, only ion current signals whose amplitude is above the predetermined threshold.
In weiterer Ausgestaltung der Auswertevorrichtung führt die Auswerte- und Steuereinheit auch die gleitende Mittelwertbildung über eine vorgebbare Anzahl von Einzelzyklen durch.In Further embodiment of the evaluation leads the evaluation and control unit also the moving averaging over a predefinable number of individual cycles.
Das Verfahren zur Auswertung eines Ionenstromssignals wird vorzugsweise zur Ermittlung des Verbrennungsschwerpunktes als Teil eines Verbrennungsregelungsverfahrens für eine Brennkraftmaschine eingesetzt.The Method for evaluating an ion current signal is preferably for determining the combustion center of gravity as part of a combustion control method for one Internal combustion engine used.
Eine vorteilhafte Ausführungsform der Erfindung ist in den Zeichnungen dargestellt und wird nachfolgend beschrieben.A advantageous embodiment The invention is illustrated in the drawings and will become apparent below described.
Dabei zeigen:there demonstrate:
Wie
aus
Durch den erfindungsgemäßen einfachen Vergleich des in einem Einzelzyklus ermittelten Ionenstroms mit einem Schwellwert, kann die Datenmenge für die weitere Auswertung ohne aufwendige Plausibilitätsprüfung reduziert werden. Dadurch wird eine Vorrichtung zur Durchführung des Verfahrens zur Auswertung des Ionenstroms ermöglicht, die einfach in einer Brennkraftmaschine implementiert werden kann.By the simple comparison according to the invention of the ion current determined in a single cycle with a threshold value, can the amount of data for the further evaluation reduced without elaborate plausibility check become. As a result, a device for carrying out the method for evaluation of the ion current allows which can be easily implemented in an internal combustion engine.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410031806 DE102004031806A1 (en) | 2004-07-01 | 2004-07-01 | Ion current signal analyzing method for internal combustion engine, involves comparing amplitude of single cycles of ion current signals with threshold value and considering only signals whose amplitudes lie above value for further analysis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE200410031806 DE102004031806A1 (en) | 2004-07-01 | 2004-07-01 | Ion current signal analyzing method for internal combustion engine, involves comparing amplitude of single cycles of ion current signals with threshold value and considering only signals whose amplitudes lie above value for further analysis |
Publications (1)
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DE102004031806A1 true DE102004031806A1 (en) | 2006-01-26 |
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DE200410031806 Withdrawn DE102004031806A1 (en) | 2004-07-01 | 2004-07-01 | Ion current signal analyzing method for internal combustion engine, involves comparing amplitude of single cycles of ion current signals with threshold value and considering only signals whose amplitudes lie above value for further analysis |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19924500C1 (en) * | 1999-05-28 | 2000-08-24 | Daimler Chrysler Ag | Operating method for gas-fuelled combustion engine, controlling combustion processes in dependence on gas quality of conveyed fuel gas |
DE19915088A1 (en) * | 1999-04-01 | 2000-10-05 | Bosch Gmbh Robert | Evaluation of ion current signals for assessing combustion processes involves subjecting measured ion current to smoothing short-duration integration, forming integrator maximum value |
DE19916204C1 (en) * | 1999-04-10 | 2000-11-16 | Daimler Chrysler Ag | Method for determining combustion parameters of an internal combustion engine |
DE19917708C1 (en) * | 1999-04-20 | 2001-01-11 | Daimler Chrysler Ag | IC engine fuel mixture evaluation method uses ion probe for providing ion current characteristic with comparison of amplitude maxima for determining fuel mixture residual gas component |
DE10236979C1 (en) * | 2002-08-13 | 2003-08-14 | Stiebel Eltron Gmbh & Co Kg | Combustion regulation method for IC engine employs switching function for providing calibration phase, regulation phase and engine cold-starting phase |
-
2004
- 2004-07-01 DE DE200410031806 patent/DE102004031806A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19915088A1 (en) * | 1999-04-01 | 2000-10-05 | Bosch Gmbh Robert | Evaluation of ion current signals for assessing combustion processes involves subjecting measured ion current to smoothing short-duration integration, forming integrator maximum value |
DE19916204C1 (en) * | 1999-04-10 | 2000-11-16 | Daimler Chrysler Ag | Method for determining combustion parameters of an internal combustion engine |
DE19917708C1 (en) * | 1999-04-20 | 2001-01-11 | Daimler Chrysler Ag | IC engine fuel mixture evaluation method uses ion probe for providing ion current characteristic with comparison of amplitude maxima for determining fuel mixture residual gas component |
DE19924500C1 (en) * | 1999-05-28 | 2000-08-24 | Daimler Chrysler Ag | Operating method for gas-fuelled combustion engine, controlling combustion processes in dependence on gas quality of conveyed fuel gas |
DE10236979C1 (en) * | 2002-08-13 | 2003-08-14 | Stiebel Eltron Gmbh & Co Kg | Combustion regulation method for IC engine employs switching function for providing calibration phase, regulation phase and engine cold-starting phase |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
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8127 | New person/name/address of the applicant |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
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8120 | Willingness to grant licenses paragraph 23 | ||
8139 | Disposal/non-payment of the annual fee |