DE10309554A1 - Combustion evaluation method for IC engine using analysis of electrical ionization signals for several combustion cycles - Google Patents
Combustion evaluation method for IC engine using analysis of electrical ionization signals for several combustion cycles Download PDFInfo
- Publication number
- DE10309554A1 DE10309554A1 DE2003109554 DE10309554A DE10309554A1 DE 10309554 A1 DE10309554 A1 DE 10309554A1 DE 2003109554 DE2003109554 DE 2003109554 DE 10309554 A DE10309554 A DE 10309554A DE 10309554 A1 DE10309554 A1 DE 10309554A1
- Authority
- DE
- Germany
- Prior art keywords
- ionization
- determining
- engine
- air ratio
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
- F02P5/14—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on specific conditions other than engine speed or engine fluid pressure, e.g. temperature
- F02P5/142—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on specific conditions other than engine speed or engine fluid pressure, e.g. temperature dependent on a combination of several specific conditions
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
-
- 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
- F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Bestimmung der Luftzahl eines Verbrennungsvorgangs bei einem Verbrennungsmotor mit verstellbarer Drehzahl und/oder verstellbarem Zündwinkel durch Auswertung eines elektrischen Ionisationssignals.The invention relates to a Method for determining the air ratio of a combustion process in an internal combustion engine with adjustable speed and / or adjustable ignition angle through Evaluation of an electrical ionization signal.
Aus der nicht vorveröffentlichten
Aus der
Diese bekannten Verfahren haben den Nachteil, dass mit zunehmender Dynamik im Motorbetrieb systembedingte Signaländerungen unterschiedlicher Höhe auftreten können, die eine eindeutige Zuordnung der Ionisationssignale zur Luftzahl der Verbrennung erschweren. Neben der Luftzahldetektion sind weitere relevante Verbrennungsanalysen, wie Klopfen und verschleppte Zündungen bei zunehmender Dynamik des Motorbetriebs mit Ionisationssignal zunehmend ungenau.These known methods have the disadvantage that with increasing dynamics in engine operation, system-related signal changes of different heights may occur, which clearly assign the ionization signals to the air ratio of the Make combustion difficult. In addition to the air ratio detection, there are others relevant combustion analyzes, such as knocking and delayed ignition with increasing dynamics of engine operation with ionization signal increasingly inaccurate.
Aufgabe der Erfindung ist es, ein Verfahren vorzuschlagen, mit dem bei unterschiedlich dynamischem Motorbetrieb die Auswertung der Ionisationssignale mit geforderter höchstmöglicher Genauigkeit erfolgt.The object of the invention is a To propose a method with different dynamic Motor operation the evaluation of the ionization signals with the required highest possible Accuracy.
Gelöst ist die Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1. Dazu ist es sinnvoll, Ionisationsverläufe einer bestimmten Anzahl von Verbrennungszyklen zu messen, aus den einzelnen Messungen einen Mittelwert zu bilden und damit die Eindeutigkeit der Ionisationssignale zu den Motorparametern in ausreichender Genauigkeit herzustellen.The task is solved by the Characteristic features of claim 1. To this end, it makes sense Ionisationsverläufe measure a certain number of combustion cycles from which individual measurements to form an average and thus the uniqueness the ionization signals to the motor parameters with sufficient accuracy manufacture.
Um auch im dynamischen oder hochdynamischen Motorbetrieb zuverlässige Ionisationssignale zur Gemischbildung bereitzustellen, wird die Anzahl n der Ionisationsverläufe, die zur Mittelwertbildung herangezogen werden, in einer vorteilhaften Ausgestaltung der Erfindung in Abhängigkeit von mindestens einem Motorparameter, und somit der Motordynamik ermittelt.In order also in dynamic or highly dynamic Engine operation reliable Providing ionization signals for mixture formation, the Number n of ionization processes, which are used for averaging, in an advantageous Embodiment of the invention depending on at least one Engine parameters, and thus the engine dynamics determined.
Im Motorsteuergerät ist ein Funktionsblock vorgesehen, der in Abhängigkeit der momentan geforderten dynamischen Motorbetriebsweise eine vom Grad dieser Dynamik abhängige Mittelwertbildung vornimmt.A function block is provided in the engine control unit, the dependent the currently required dynamic engine operating mode is one of degree dependent on this dynamic Averages.
In der Zeichnung zeigenShow in the drawing
Die Funktionsweise sei anhand der
- – Änderungsgeschwindigkeit der ausgewerteten Ionisationssignale dIO/dt,
- – Änderungsgeschwindigkeit der Motordrehzahl ddrz/dt,
- – Motorbeschleunigung ddrossel/dt.....
- - rate of change of the evaluated ionization signals d IO / dt,
- - speed of change of engine speed d drz / dt,
- - Motor acceleration d throttle / dt .....
Aus den die Motordynamik beschreibenden Größen berechnet Block V die Anzahl der benötigten Mittelungen n und führt diese Größe n der Speicherstufe VI zu. Die ausgewerteten Signale der Stufe IV werden im Block VI gespeichert. Der Speicher der Stufe VI ist als Fließspeicher ausgeführt. Das bedeutet, dass eine bestimmte Menge Ionisationszyklen abgespeichert werden, wobei bei jedem aktuell abgespeicherten Ionisationswert IOneu ein in der Vergangenheit gespeicherter Wert IOalt gelöscht wird. Die am Eingang von Stufe VI anstehende Größe n wird in Stufe VI benutzt, um die Anzahl der Mittelungen nach festgelegten Mittelungsverfahren, wie beispielsweise arithmetische Mittelwertbildung oder eine andere Art der Mittelwertbildung durchzuführen. Als Ergebnis steht das Signal des gemittelten Ionisationssignals IOmittel am Eingang der Stufe VII an, um als Ionisationsistwert für die Gemischaufbereitung verarbeitet zu werden.From the variables describing the engine dynamics, block V calculates the number of averages n required and supplies this variable n to storage stage VI. The evaluated signals of stage IV are stored in block VI. The stage VI storage is designed as a flow storage. This means that a certain number of ionization cycles are saved, with a value IO old saved in the past being deleted for each currently saved ionization value IO new . The variable n at the input of stage VI is used in stage VI to carry out the number of averages according to defined averaging methods, such as arithmetic averaging or another type of averaging. As a result, the signal of the average ionization signal IO medium is present at the input of stage VII in order to be processed as the actual ionization value for the mixture preparation.
Bei hochdynamischen Vorgängen im
Fahrbetrieb eines Ottomotors muß die
Gemischregelung hierbei insbesondere die Sensorik auf diese Vorgänge dynamisch
reagieren. Schnelle Vorgänge,
beispielsweise plötzliche
Beschleunigungen, werden mit einer reduzierten Anzahl von gemittelten
Ionisationszyklen regeltechnisch verarbeitet. Bei langsamen Vorgängen, wie
sie beispielsweise bei einer Autobahnfahrt mit konstanter Geschwindigkeit
auftreten, kann die Anzahl n der Mittelungen vergrößert werden,
um die Genauigkeit der Gemischregelung zu erhöhen (siehe
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003109554 DE10309554B4 (en) | 2003-03-04 | 2003-03-04 | Method for evaluating ionization signals during dynamic engine operation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003109554 DE10309554B4 (en) | 2003-03-04 | 2003-03-04 | Method for evaluating ionization signals during dynamic engine operation |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10309554A1 true DE10309554A1 (en) | 2004-09-23 |
DE10309554B4 DE10309554B4 (en) | 2013-02-21 |
Family
ID=32891872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003109554 Expired - Fee Related DE10309554B4 (en) | 2003-03-04 | 2003-03-04 | Method for evaluating ionization signals during dynamic engine operation |
Country Status (1)
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DE (1) | DE10309554B4 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000061932A1 (en) * | 1999-04-10 | 2000-10-19 | Daimlerchrysler Ag | Method for determining the combustion characteristics 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 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19614388C1 (en) * | 1996-04-12 | 1997-07-03 | Stiebel Eltron Gmbh & Co Kg | Evaluation of quality of mixture of fuel and air in combustion engine |
DE10236977B4 (en) * | 2002-08-13 | 2004-07-29 | Stiebel Eltron Gmbh & Co. Kg | Method for determining the air ratio of a combustion process in an internal combustion engine |
-
2003
- 2003-03-04 DE DE2003109554 patent/DE10309554B4/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000061932A1 (en) * | 1999-04-10 | 2000-10-19 | Daimlerchrysler Ag | Method for determining the combustion characteristics 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 |
Also Published As
Publication number | Publication date |
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DE10309554B4 (en) | 2013-02-21 |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
R009 | Remittal by federal patent court to dpma for new decision or registration | ||
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20130522 |
|
R081 | Change of applicant/patentee |
Owner name: VOLKSWAGEN AG, DE Free format text: FORMER OWNER: STIEBEL ELTRON GMBH & CO. KG, 37603 HOLZMINDEN, DE Effective date: 20141015 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |