EP0898065A2 - Verfahren zur Bestimmung einer Betriebsgrösse eines Verbrennungsmotors - Google Patents
Verfahren zur Bestimmung einer Betriebsgrösse eines Verbrennungsmotors Download PDFInfo
- Publication number
- EP0898065A2 EP0898065A2 EP98114352A EP98114352A EP0898065A2 EP 0898065 A2 EP0898065 A2 EP 0898065A2 EP 98114352 A EP98114352 A EP 98114352A EP 98114352 A EP98114352 A EP 98114352A EP 0898065 A2 EP0898065 A2 EP 0898065A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- maximum
- internal combustion
- combustion engine
- ion current
- fuel
- 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
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Classifications
-
- 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
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1458—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with determination means using an estimation
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
Definitions
- the present invention relates to methods for determining a Operating size of an internal combustion engine.
- the Fuel-air ratio in exhaust gas measured using lambda probes.
- Ion current measurements on spark plugs of an internal combustion engine are known. Such measurements are conventionally used for detection misfires and knocking engine operation.
- DE 35 06 114 A1 describes a method for controlling a Internal combustion engine with detection of ion currents known.
- ion current determined Measuring spectrum calculated and with a reference spectrum on a Computing unit compared, depending on the determined Deviation controlled a manipulated variable of the internal combustion engine becomes.
- a knock detector for a Internal combustion engine which the ion current over a Ignition coil detected at the time of combustion, and judged whether or whether the ion current is not above a predetermined level after a predetermined time or a crank angle the ignition is on.
- This device is used exclusively for Detection of knocking used.
- the amplitude of the ion current signal determines a fuel-air ratio of an internal combustion engine.
- the ion current signal is subject to strong cyclical fluctuations, so that a Averaging the ion current maxima over a large number of Cycles must be performed to the required accuracy to achieve the lambda measurement. Because of this Errors that arise in transient operation are procedures this type is not suitable for series production.
- the ion current amplitude depending on the type of fuel used, so that a detection to determine the actual lambda value the type of fuel is necessary.
- the object of the invention is therefore to create a method for determining an operating variable of an internal combustion engine, with which these can be reliably determined in a simple manner can.
- the method according to the invention it is possible to set the Operating variables of an internal combustion engine over relative to determine short cycles with sufficient accuracy.
- According to the invention becomes a measurement of a number of cycles of the ion current signal depending on the time performed. By Averaging these measurements can interfere, in particular Secondary maxima in the ion current signal, eliminated and the actual Main maximum and / or the time at which the main maximum occurs be determined.
- the respective company sizes can be determined in a simple manner. It is in particular a lambda detection during a Cold starts possible. Wear or aging of the sensor, as they can occur with conventional lambda probes be excluded now.
- With the method according to the invention is a cycle-resolved determination of the named company size possible. Furthermore, a determination of the above-mentioned operating parameters also possible when the engine is lean.
- the size of the company to be determined is expediently around the air-fuel ratio ⁇ (lambda ratio) of the internal combustion engine. It was found that the Time until the first maximum I1max of the ion current is reached not on the ionizability of the fuel, i.e. of the Type of fuel, but only by the turbulent burning speed depends. The turbulent burning speed is in turn depending on the laminar burning speed and the turbulence intensity. The laminar burning speed will determined by the fuel-air ratio ⁇ , the residual gas fraction, as well as the temperature and pressure of the mixture in the cylinder. There the temperature and pressure from the intake pressure and ignition timing are known, therefore, with a known exhaust gas recirculation rate Fuel-air ratio ⁇ can be determined.
- the first maximum I1max arises in the Flame core formation phase, in which the flame is still in the area of the Is spark plug. Ideally, the flame spreads spherically in the combustion chamber. Currents at the spark plug and above all Turbulence influences on the flame core lead to one Fissure of the flame.
- the first maximum I1max of the ion current signal is therefore not smooth, but has several secondary maxima. For an evaluation of the first maximum in the ion current signal it is therefore necessary to average over several cycles or to perform over a number of ignitions. Traditionally this was done for each ion current signal, i.e. with each ignition, the absolute maximum is determined. Of that determined values, the mean was formed. Because of the large fluctuations of the absolute maxima must Averaging the ion current maxima over a very large number of Cycles are performed to the required accuracy of the To achieve lambda measurement.
- the course of the ion current signal is now shown in Depends on the time over the entire area of the first Maximum determined. Those determined for several ignitions Waveforms are then averaged, resulting in a smoothed signal curve that eliminates the secondary maxima results from which an averaged maximum amplitude or Time of the averaged maximum amplitude in a simple manner is readable.
- This procedure can be used for adequate Accuracy required number of cycles compared to the conventional Procedures are greatly reduced. It is assumed, that there is sufficient accuracy of the lambda detection can be achieved with an averaging over 5 to 20 cycles.
- the speed of propagation depends the flame, and thus the time between ignition and reaching of the first maximum t1max from the turbulent burning speed from. As explained, it is from t1max with a known exhaust gas recirculation rate a determination of the air-fuel ratio, or a determination if the fuel-air ratio is known the exhaust gas recirculation rate possible.
- the time t1max until the first maximum in the ion current is reached is on the other hand of the ionizability of the fuel, which is influenced by the fuel quality or fuel additives becomes independent.
- the amplitude of the first maximum I1max of the ion current not only depends on the fuel-air ratio, but because of different ionizabilities different fuels also from the fuel quality and fuel additives.
- a Number of firings each time the maximum value of the Ion current signal determined.
- An averaging is then carried out the times of receipt determined for the respective maxima an averaged time. Based on this averaged At the point in time, as already explained above, it is possible the farm sizes in question with sufficient accuracy determine. This procedure can also be sufficient Achieve company size accuracies.
- the ion current signal is over an analog-digital converter AD line by line into a buffer Z loaded.
- the cache is preferably a dynamic buffer with shift register function for the respective ion current signals In-In-k.
- the buffer consists of a total of k lines with a first-in-first-out function (FIFO), in which ion current signals are stored are.
- FIFO first-in-first-out function
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims (4)
- Verfahren zur Bestimmung einer Betriebsgröße eines Verbrennungsmotors mit folgenden Schritten:Messung eines Ionenstromsignalverlaufs an einer Zündkerze des Verbrennungsmotors für eine Anzahl von Zündungen jeweils in Abhängigkeit von der Zeit,Mittelung der jeweils gemessenen Signalverläufe zum Erhalt eines gemittelten Signalverlaufs,Ermittlung des Maximums und/oder des Zeitpunkts des Maximums des gemittelten Signalverlaufs,Berechnung dar Betriebsgröße auf der Grundlage des Maximums und/oder des Zeitpunkts des Maximums des gemittelten Signalverlaufs.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die zu bestimmende Betriebsgröße das Kraftstoff-Luft-Verhältnis λ des Verbrennungsmotors ist.
- Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die zu bestimmende Betriebsgröße die Abgasrückführrate des Verbrennungsmotors ist.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Messungen an verschiedenen Zündkerzen bzw. Zylindern durchgeführt werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19735454 | 1997-08-16 | ||
| DE19735454A DE19735454A1 (de) | 1997-08-16 | 1997-08-16 | Verfahren zur Bestimmung einer Betriebsgröße eines Verbrennungsmotors |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0898065A2 true EP0898065A2 (de) | 1999-02-24 |
| EP0898065A3 EP0898065A3 (de) | 2000-11-22 |
| EP0898065B1 EP0898065B1 (de) | 2003-09-03 |
Family
ID=7839102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98114352A Expired - Lifetime EP0898065B1 (de) | 1997-08-16 | 1998-07-30 | Verfahren zur Bestimmung einer Betriebsgrösse eines Verbrennungsmotors |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6125691A (de) |
| EP (1) | EP0898065B1 (de) |
| DE (2) | DE19735454A1 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19849115C2 (de) * | 1998-10-24 | 2000-10-12 | Daimler Chrysler Ag | Verfahren zur Erkennung der Qualität von Kraftstoff für Brennkraftmaschinen |
| DE19911019C2 (de) | 1999-03-12 | 2001-02-08 | Daimler Chrysler Ag | Verfahren zur Bestimmung des Luft/Kraftstoff-Verhältnisses in einem Brennraum einer Brennkraftmaschine |
| DE19924500C1 (de) * | 1999-05-28 | 2000-08-24 | Daimler Chrysler Ag | Verfahren zum Betrieb einer gasgespeisten Brennkraftmaschine |
| DE10011614A1 (de) * | 2000-03-10 | 2001-09-13 | Delphi Tech Inc | Verfahren zum Bestimmen des Beginns einer Verbrennung im Zylinder eines Verbrennungsmotors |
| JP3579404B2 (ja) * | 2002-05-27 | 2004-10-20 | 三菱電機株式会社 | 内燃機関の失火検出装置 |
| US6840237B2 (en) * | 2002-12-30 | 2005-01-11 | Ford Global Technologies, Llc | Method for auto-ignition operation and computer readable storage device |
| EP1435445A1 (de) * | 2002-12-30 | 2004-07-07 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Brennkraftmaschine, Verfahren für selbstgezündeten Betrieb und computerlesbares Speichermedium |
| DE102004041230A1 (de) * | 2004-08-26 | 2006-03-02 | Volkswagen Ag | Zylindergleichstellung mittels Ionenstrommessung |
| DE102007021283A1 (de) * | 2007-05-07 | 2008-11-13 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Ermittlung des Verbrennungs-Lambdawerts einer Brennkraftmaschine |
| JP4462315B2 (ja) * | 2007-09-24 | 2010-05-12 | 株式会社デンソー | 内燃機関制御装置 |
| US10774773B2 (en) * | 2011-01-28 | 2020-09-15 | Wayne State University | Autonomous operation of electronically controlled internal combustion engines on a variety of fuels and/or other variabilities using ion current and/or other combustion sensors |
| RU2015103802A (ru) * | 2011-07-20 | 2016-09-10 | СиЭмТиИ ДЕВЕЛОПМЕНТ ЛИМИТЕД | Искровое контрольное устройство |
| ITRE20110060A1 (it) * | 2011-08-02 | 2013-02-03 | Emak Spa | "sistema di controllo della carburazione" |
| JP5753142B2 (ja) | 2012-09-19 | 2015-07-22 | 本田技研工業株式会社 | 内燃機関の燃焼制御装置及び均質希薄混合気の燃焼方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3506114A1 (de) | 1985-02-22 | 1986-09-04 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur steuerung oder regelung einer brennkraftmaschine |
| DE4037943A1 (de) | 1990-11-29 | 1992-06-04 | Bayerische Motoren Werke Ag | Betriebsverfahren fuer eine fremdgezuendete mehrzylindrige brennkraftmaschine mit zylinderindividueller kraftstoffzufuhr |
| DE4239592A1 (de) | 1991-11-26 | 1993-05-27 | Mitsubishi Electric Corp |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT386256B (de) * | 1984-07-02 | 1988-07-25 | Atlas Fahrzeugtechnik Gmbh | Anordnung zur erzeugung eines ausloeseimpulses fuer die zuendung einer brennkraftmaschine |
| JP2909345B2 (ja) * | 1993-03-23 | 1999-06-23 | 三菱電機株式会社 | 内燃機関制御装置 |
| JPH07293315A (ja) * | 1994-04-27 | 1995-11-07 | Daihatsu Motor Co Ltd | 空燃比検出方法 |
| SE503900C2 (sv) * | 1995-01-18 | 1996-09-30 | Mecel Ab | Metod och system för övervakning av förbränningsmotorer genom detektering av aktuellt blandningsförhållande luft-bränsle |
| US5803047A (en) * | 1995-10-19 | 1998-09-08 | Mecel Ab | Method of control system for controlling combustion engines |
| JPH09324690A (ja) * | 1996-06-03 | 1997-12-16 | Mitsubishi Electric Corp | 内燃機関制御装置 |
| JP3205512B2 (ja) * | 1996-09-05 | 2001-09-04 | トヨタ自動車株式会社 | 内燃機関の燃焼状態検出装置 |
| JP3662364B2 (ja) * | 1996-09-27 | 2005-06-22 | トヨタ自動車株式会社 | 内燃機関のノッキング検出装置 |
| US6029627A (en) * | 1997-02-20 | 2000-02-29 | Adrenaline Research, Inc. | Apparatus and method for controlling air/fuel ratio using ionization measurements |
-
1997
- 1997-08-16 DE DE19735454A patent/DE19735454A1/de not_active Withdrawn
-
1998
- 1998-07-30 DE DE59809469T patent/DE59809469D1/de not_active Expired - Fee Related
- 1998-07-30 EP EP98114352A patent/EP0898065B1/de not_active Expired - Lifetime
- 1998-08-14 US US09/134,485 patent/US6125691A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3506114A1 (de) | 1985-02-22 | 1986-09-04 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren zur steuerung oder regelung einer brennkraftmaschine |
| DE4037943A1 (de) | 1990-11-29 | 1992-06-04 | Bayerische Motoren Werke Ag | Betriebsverfahren fuer eine fremdgezuendete mehrzylindrige brennkraftmaschine mit zylinderindividueller kraftstoffzufuhr |
| DE4239592A1 (de) | 1991-11-26 | 1993-05-27 | Mitsubishi Electric Corp |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0898065B1 (de) | 2003-09-03 |
| DE19735454A1 (de) | 1999-02-18 |
| EP0898065A3 (de) | 2000-11-22 |
| US6125691A (en) | 2000-10-03 |
| DE59809469D1 (de) | 2003-10-09 |
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