EP1464834B1 - Method for optimizing the ignition of an air-fuel mixture for direct-start of combustion engine - Google Patents
Method for optimizing the ignition of an air-fuel mixture for direct-start of combustion engine Download PDFInfo
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- EP1464834B1 EP1464834B1 EP20040100978 EP04100978A EP1464834B1 EP 1464834 B1 EP1464834 B1 EP 1464834B1 EP 20040100978 EP20040100978 EP 20040100978 EP 04100978 A EP04100978 A EP 04100978A EP 1464834 B1 EP1464834 B1 EP 1464834B1
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- Prior art keywords
- ignition
- combustion engine
- correction function
- internal combustion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N99/00—Subject matter not provided for in other groups of this subclass
- F02N99/002—Starting combustion engines by ignition means
- F02N99/004—Generation of the ignition spark
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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
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
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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
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
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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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/065—Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N99/00—Subject matter not provided for in other groups of this subclass
- F02N99/002—Starting combustion engines by ignition means
- F02N99/006—Providing a combustible mixture inside the cylinder
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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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
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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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
Definitions
- Such starting methods are known and described for example in DE 197 41 294 A1 and DE 197 43 492 A1. They are an integral part of a start-stop strategy for the internal combustion engine and are mainly used in city operations (stop and go). They serve to save fuel and avoid or reduce pollutant emissions.
- the pressure in the combustion chamber of the first cylinder put into operation is comparatively low. This compared to normal operating conditions reduced pressure in the combustion chamber leads to other combustion characteristics and / or operating conditions of the internal combustion engine. Therefore, in order to improve the combustion and ignitability of the air-fuel mixture, a larger ignition energy must normally be applied than during normal operation of the internal combustion engine.
- the correction function provided according to the invention ensures that the optimum ignition energy is provided for each direct start, which is particularly important for the first combustion in the first cylinder put into operation.
- the correction function used for this purpose consists for example of a fixed correction factor. Is z. For example, if the default load time is 3 milliseconds and the correction factor is 1.5, then the corrected load time is 4.5 milliseconds. It can be seen from the diagram of FIG. 1 that the corrected (increased) charging time leads to a corresponding increase in the energy generated in the ignition coil.
- the correction function used for the purpose according to the invention can be any desired correction function, as are widely known for the correction of other operating parameters of the internal combustion engine.
- a multiplicative correction value instead of a multiplicative correction value, it is also possible to use an additive correction value, an interpolation of two maps obtained during calibration, etc.
- a correction function which depends on specific operating parameters of the internal combustion engine, in particular pressure and temperature in the combustion chamber of the internal combustion engine during a direct start.
- 2 illustrates an exemplary embodiment in which an additive correction factor depends on the temperature and the pressure in the combustion chamber.
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- 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)
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Optimieren der Zündung eines Luft-Kraftstoff-Gemisches für Direktstarts einer fremdgezündeten Brennkraftmaschine mit Kraftstoffeinspritzung.The present invention relates to a method of optimizing the ignition of an air-fuel mixture for direct starts of a spark-ignited internal combustion engine with fuel injection.
Unter einem Direktstart, im englischen als "Instant-Start" oder "Fast-Start" bezeichnet, versteht man den Startvorgang einer Brennkraftmaschine mit Kraftstoffeinspritzung ohne Benutzung eines herkömmlichen elektrischen Anlassers. Nach dem Abstellen der Brennkraftmaschine erfolgt der Wiederstart dadurch, dass in einen Zylinder eine bestimmte Kraftstoffmenge unter Druck eingespritzt wird, der Kraftstoff mit der im Zylinder befindlichen Luft ein zündfähiges Gemisch bildet, dieses Gemisch durch einen Zündvorgang (üblicherweise den Funken einer Zündkerze) zur Explosion gebracht und die Brennkraftmaschine durch das dabei entstehende Drehmoment in Gang gesetzt wird.A direct start, referred to in English as "instant start" or "fast start", is the starting process of a fuel injection internal combustion engine without the use of a conventional electric starter. After switching off the internal combustion engine, the restart takes place in that a certain amount of fuel is injected under pressure into a cylinder, the fuel forms an ignitable mixture with the air in the cylinder, this mixture by an ignition (usually the spark of a spark plug) brought to the explosion and the internal combustion engine is set in motion by the resulting torque.
Derartige Startverfahren sind bekannt und beispielsweise in der DE 197 41 294 A1 und DE 197 43 492 A1 beschrieben. Sie sind ein wesentlicher Bestandteil einer Start-Stopp-Strategie für die Brennkraftmaschine und kommen vor allem im Stadtbetrieb zum Einsatz (Stop and Go). Sie dienen der Kraftstoffersparnis und der Vermeidung bzw. Verminderung von Schadstoffemissionen.Such starting methods are known and described for example in DE 197 41 294 A1 and DE 197 43 492 A1. They are an integral part of a start-stop strategy for the internal combustion engine and are mainly used in city operations (stop and go). They serve to save fuel and avoid or reduce pollutant emissions.
Es versteht sich, dass zum Herbeiführen eines Direktstarts ganz bestimmte Bedingungen erfüllt sein müssen. Eine dieser Bedingungen ist, für eine einwandfreie Zündung des Luft-Kraftstoff-Gemisches zu sorgen. Es ist bekannt, dass die zum Erzeugen eines zufriedenstellenden Zündfunkens erforderliche Zündenergie von dem Druck und der Turbulenz im Brennraum ab hängt. Während eines Direktstarts sind jedoch Druck und Turbulenz im Brennraum deutlich verschieden von denen während eines normalen Betriebs der Brennkraftmaschine. Die bei normalem Betrieb der Brennkraftmaschine eingesetzte Zündenergie führt daher bei einem Direktstart möglicherweise nur zu unbefriedigenden Ergebnissen.It is understood that very specific conditions have to be met in order to achieve a direct start. One of these conditions is to ensure proper ignition of the air-fuel mixture. It is known that the ignition energy required to produce a satisfactory spark depends on the pressure and turbulence in the combustion chamber hangs. During a direct start, however, pressure and turbulence in the combustion chamber are significantly different from those during normal operation of the engine. The ignition energy used during normal operation of the internal combustion engine therefore possibly leads to unsatisfactory results in a direct start.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Optimieren der Zündenergie für Direktstarts einer fremdgezündeten Brennkraftmaschine mit Kraftstoffeinspritzung anzugeben.The present invention has for its object to provide a method for optimizing the ignition energy for direct starts of a spark-ignited internal combustion engine with fuel injection.
Diese Aufgabe wird durch das in Anspruch 1 definierte Verfahren gemäß der Erfindung gelöst.This object is achieved by the method defined in claim 1 according to the invention.
Bei dem erfindungsgemäßen Verfahren wird für jeden Direktstart aus einem im Normalbetrieb verwendeten Standardwert für die Zündenergie mittels einer vorgegebenen Korrekturfunktion ein korrigierter Wert für die Zündenergie ermittelt und die Zündung des Luft-Kraftstoff-Gemisches mit einer Zündenergie entsprechend diesem korrigierten Wert durchgeführt.In the method according to the invention, a corrected value for the ignition energy is determined for each direct start from a standard value for the ignition energy used in normal operation by means of a predetermined correction function and the ignition of the air-fuel mixture is performed with an ignition energy corresponding to this corrected value.
Während Direktstarts ist der Druck im Brennraum des als ersten in Betrieb genommenen Zylinders vergleichsweise niedrig. Dieser gegenüber normalen Betriebszuständen verringerte Druck im Brennraum führt zu anderen Verbrennungseigenschaften und/oder Betriebszuständen der Brennkraftmaschine. Um die Verbrennung und Zündfähigkeit des Luft-Kraftstoff-Gemisches zu verbessern, muss daher normalerweise eine größere Zündenergie als bei normalem Betrieb der Brennkraftmaschine aufgebracht werden. Durch die erfindungsgemäß vorgesehene Korrekturfunktion wird sichergestellt, dass für jeden Direktstart die optimale Zündenergie bereitgestellt wird, was besonders wichtig ist für die erste Verbrennung im ersten in Betrieb genommenen Zylinder.During direct starts, the pressure in the combustion chamber of the first cylinder put into operation is comparatively low. This compared to normal operating conditions reduced pressure in the combustion chamber leads to other combustion characteristics and / or operating conditions of the internal combustion engine. Therefore, in order to improve the combustion and ignitability of the air-fuel mixture, a larger ignition energy must normally be applied than during normal operation of the internal combustion engine. The correction function provided according to the invention ensures that the optimum ignition energy is provided for each direct start, which is particularly important for the first combustion in the first cylinder put into operation.
Das erfindungsgemäße Verfahren ist für jede Art von Zündsystemen einschließlich Flammstrahl-, Plasma- und Laser-Zündsystemen geeignet. Vorzugsweise wird es jedoch in Verbindung mit Spulenzündsystemen mit elektrischer Zündspule und Zündkerze verwendet. Bei Spulenzündsystemen wird die von der Zündspule an die Zündkerze abzugebende Energie durch die Eigenschaften und Ladezeit der Zündspule bestimmt. Da die Spuleneigenschaften unveränderlich sind, wird daher üblicherweise die Ladezeit der Zündspule zum Ändern der Zündenergie verwendet. In weiterer Ausgestaltung der Erfindung werden daher als Standardwert und korrigierter Wert für die Zündenergie ein Standardwert und korrigierter Wert der Ladezeit der Zündspule verwendet.The method of the invention is suitable for any type of ignition system including flame jet, plasma and laser ignition systems. Preferably, however, it is used in conjunction with coil ignition systems with electrical ignition coil and spark plug. In coil ignition systems, the energy to be delivered from the ignition coil to the spark plug is determined by the characteristics and charging time of the ignition coil. Therefore, since the coil characteristics are invariable, the charging time of the ignition coil is usually used to change the ignition energy. In a further embodiment of the invention, therefore, a standard value and corrected value of the charging time of the ignition coil are used as standard value and corrected value for the ignition energy.
Die vorgegebene Korrekturfunktion kann irgendeine Korrekturfunktion sein, wie sie zum Korrigieren und Anpassen anderer Betriebsparameter von Brennkraftmaschinen grundsätzlich bekannt ist. So kann die Korrekturfunktion beispielsweise aus einem mit dem Standartwert additiv oder multiplikativ verknüpften Korrekturwert oder auch aus einer Interpolation zweier beim Kalibrieren gewonnener Kennfelder bestehen. Im einfachsten Fall wird eine von Betriebsparametern der Brennkraftmaschine unabhängige Korrekturfunktion, z. B. ein fester multiplikativer oder additiver Korrekturwert, verwendet. Zwecks Verfeinerung des erfindungsgemäßen Verfahrens wird in weiterer Ausgestaltung der Erfindung vorgesehen, dass die Korrekturfunktion von Druck und/oder Temperatur des Luft-Kraftstoff-Gemisches im Brennraum der Brennkraftmaschine abhängig ist.The predetermined correction function may be any correction function basically known for correcting and adjusting other operating parameters of internal combustion engines. For example, the correction function can consist of a correction value additively or multiplicatively linked to the standard value or also of an interpolation of two characteristic maps obtained during calibration. In the simplest case, an independent of operating parameters of the internal combustion engine correction function, for. A fixed multiplicative or additive correction value. For the purpose of refinement of the method according to the invention, it is provided in a further embodiment of the invention that the correction function of pressure and / or temperature of the air-fuel mixture in the combustion chamber of the internal combustion engine is dependent.
Durch das erfindungsgemäße Verfahren wird sichergestellt, dass bei Direktstarts jeweils die richtige Zündenergie für eine sichere Zündung des Luft-Kraftstoff-Gemisches bereitgestellt wird, um eine selbsterhaltende Verbrennung auszulösen. Dies wird im Fall eines Spulenzündsystems durch die erfindungsgemäß vorgesehene Korrektur der Ladezeit der Zündspule erreicht. Zusätzlich zu einer einwandfreien Zündung und Verbrennung des Gemisches wird durch das erfindungsgemäße Verfahren auch ein Schutz der Zündspule gegen Überhitzung erreicht. Ein weiterer Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass es in extrem einfacher Weise von dem elektronischen Betriebssteuergerät (EMS) durchgeführt werden kann. Selbst bei Anpassung der Korrekturfunktion an Druck und/oder Temperatur des Gemisches im Brennraum ist nur ein relativ geringer Rechenaufwand des elektronischen Betriebssteuergerätes erforderlich.The method according to the invention ensures that, in the case of direct starts, the correct ignition energy is provided in each case for reliable ignition of the air-fuel mixture in order to trigger self-sustaining combustion. This is achieved in the case of a Spulenzündsystems by inventively provided correction of the charging time of the ignition coil. In addition to a flawless ignition and Combustion of the mixture is achieved by the inventive method, a protection of the ignition coil against overheating. Another advantage of the method according to the invention is that it can be carried out in an extremely simple manner by the electronic operating control unit (EMS). Even if the correction function is adapted to the pressure and / or temperature of the mixture in the combustion chamber, only a relatively small amount of computation of the electronic operating control unit is required.
Anhand der Zeichnungen werden weitere Einzelheiten des erfindungsgemäßen Verfahrens erläutert. Es zeigt:
- Fig. 1
- ein Diagramm, in dem die Spannung V bzw. Energie E einer Zündspule über der Zeit t aufgetragen ist und das zur Erläuterung von mit der Ladezeit einer Zündspule zusammenhängenden Parametern dient, und
- Fig. 2
- eine schematische Darstellung eines Ausführungsbeispiels des erfindungsgemäßen Verfahrens.
- Fig. 1
- a graph in which the voltage V and energy E of an ignition coil is plotted against the time t and which serves to explain associated with the charging time of an ignition coil parameters, and
- Fig. 2
- a schematic representation of an embodiment of the method according to the invention.
In dem Diagramm der Fig. 1 stellt die Kurve a ein Spannungssignal dar, das eine bestimmte Aufladung einer Zündspule (nicht gezeigt) einer fremdgezündeten Brennkraftmaschine mit Kraftstoffeinspritzung anfordert. Die Aufladung der Zündspule beginnt somit im Zeitpunkt t1 und endet im Zeitpunkt t2. Die Kurve b gibt hierbei die in der Zündspule erzeugte Energie wieder, welche gemäß der Kurve c in einem Energiestoß an die Zündkerze (nicht gezeigt) abgegeben wird, um einen entsprechenden Zündfunken zu erzeugen.In the diagram of FIG. 1, the curve a represents a voltage signal requesting a certain charge of an ignition coil (not shown) of a spark-ignition internal combustion engine with fuel injection. The charging of the ignition coil thus begins at time t 1 and ends at time t 2 . The curve b in this case represents the energy generated in the ignition coil, which is emitted according to the curve c in a burst of energy to the spark plug (not shown) to generate a corresponding spark.
Die Zeitspanne t2 - t1 stellt somit die Ladezeit TD (dwell time) der Zündspule dar, welche die Größe der in der Zündspule gespeicherten Energie bestimmt.The time span t 2 -t 1 thus represents the charging time TD (dwell time) of the ignition coil, which determines the size of the energy stored in the ignition coil.
Es sei angenommen, dass die Zeitspanne t2 - t1 den Standardwert für die Ladezeit IP_TD im Normalbetrieb der Brennkraft maschine darstellt. Für einen Direktstart (Instant-Start) wird dieser Standardwert erfindungsgemäß korrigiert (normalerweise erhöht), um trotz des vergleichsweise niederen Drucks im Brennraum für eine einwandfreie Zündung des Luf-Kraftstoff-Gemisches zu sorgen.It is assumed that the time interval t 2 -t 1 is the default value for the charging time IP_TD during normal operation of the internal combustion engine machine represents. For a direct start (instant start) this standard value is corrected according to the invention (normally increased) in order to ensure a perfect ignition of the air-fuel mixture despite the comparatively low pressure in the combustion chamber.
Die hierzu verwendete Korrekturfunktion besteht beispielsweise aus einem festen Korrekturfaktor. Beträgt z. B. der Standardwert für die Ladezeit 3 Millisekunden und der Korrekturfaktor 1,5, so beträgt die korrigierte Ladezeit 4,5 Millisekunden. Dem Diagramm der Fig. 1 lässt sich entnehmen, dass die korrigierte (erhöhte) Ladezeit zu einer entsprechenden Erhöhung der in der Zündspule erzeugten Energie führt.The correction function used for this purpose consists for example of a fixed correction factor. Is z. For example, if the default load time is 3 milliseconds and the correction factor is 1.5, then the corrected load time is 4.5 milliseconds. It can be seen from the diagram of FIG. 1 that the corrected (increased) charging time leads to a corresponding increase in the energy generated in the ignition coil.
Wie bereits eingangs erwähnt, kann die für den erfindungsgemäßen Zweck eingesetzte Korrekturfunktion irgendeine beliebige Korrekturfunktion sein, wie sie zur Korrektur anderer Betriebsparameter der Brennkraftmaschine in großer Vielfalt bekannt sind. Insbesondere können statt eines multiplikativen Korrekturwertes auch ein additiver Korrekturwert, eine Interpolation zweier beim Kalibrieren gewonnener Kennfelder usw. verwendet werden.As already mentioned, the correction function used for the purpose according to the invention can be any desired correction function, as are widely known for the correction of other operating parameters of the internal combustion engine. In particular, instead of a multiplicative correction value, it is also possible to use an additive correction value, an interpolation of two maps obtained during calibration, etc.
Zur weiteren Verfeinerung des erfindungsgemäßen Verfahrens ist es möglich, eine Korrekturfunktion zu verwenden, die von bestimmten Betriebsparametern der Brennkraftmaschine, insbesondere von Druck und Temperatur im Brennraum der Brennkraftmaschine während eines Direktstarts, abhängt. Fig. 2 veranschaulicht hierfür ein Ausführungsbeispiel, bei dem ein additiver Korrekturfaktur von der Temperatur und dem Druck im Brennraum abhängt.For further refinement of the method according to the invention, it is possible to use a correction function which depends on specific operating parameters of the internal combustion engine, in particular pressure and temperature in the combustion chamber of the internal combustion engine during a direct start. 2 illustrates an exemplary embodiment in which an additive correction factor depends on the temperature and the pressure in the combustion chamber.
An einem Eingang 2 wird ein Standardwert IP TD der Ladezeit der Zündspule bei normalem Betrieb der Brennkraftmaschine eingegeben. Wird die Brennkraftmaschine in üblicher Weise mit Hilfe eines elektrischen Anlassers gestartet, so wird als Ladezeit TD der Zündspule der Standardwert IP_TD verwendet.At an
Bei einem Direktstart wird dagegen der Standardwert IP_TD der Ladezeit mit einem additiven Korrekturwert IP_TD_COR korrigiert. Dieser additive Korrekturwert wird einem beim Kalibrieren gewonnenen Kennfeld 5 entnommen, in dem der Korrekturwert über der Temperatur und dem Druck (Eingänge 3 und 4) aufgetragen ist. Die im Schritt 6 durch Addition gewonnene korrigierte Ladezeit TD steht dann am Ausgang 1 zwecks weiterer Verarbeitung zur Verfügung.In the case of a direct start, on the other hand, the default value IP_TD of the charging time is corrected with an additive correction value IP_TD_COR. This additive correction value is taken from a
Auf diese Weise lässt sich für jeden Direktstart die Ladezeit und damit die Zündenergie für den Zündvorgang optimieren, um für eine einwandfreie Zündung des Gemisches, insbesondere bei der ersten Verbrennung zu sorgen, ohne unnötig viel Zündenergie zu verbrauchen. Die sich hieraus ergebenden Vorteile wie einwandfreie Verbrennung, Reduzierung von Schadstoffemissionen, Schutz der Zündspule usw. wurden bereits eingangs erläutert.In this way, for each direct start, the charging time and thus the ignition energy for the ignition process can be optimized to ensure proper ignition of the mixture, especially in the first combustion, without consuming a lot of ignition energy. The resulting advantages such as perfect combustion, reduction of pollutant emissions, protection of the ignition coil, etc. have already been explained above.
Claims (6)
- Method for optimising the ignition of an air/fuel mixture for direct starts of a spark-ignited internal combustion engine with fuel injection, wherein for each direct start a predefined correction function is used to determine a corrected value from a default value for the ignition energy that is used in normal operation and the igniting of the mixture is performed by means of an ignition energy corresponding to this corrected value.
- Method according to claim 1, characterised in that the correction function is independent of operating parameters of the internal combustion engine.
- Method according to claim 1, characterised in that the correction function is dependent on the pressure and/or temperature of the air/fuel mixture in the combustion chamber of the internal combustion engine at the time of the respective direct start.
- Method according to any one of claims 1 to 3, characterised in that the predefined correction function consists of a correction value linked additively or multiplicatively to the default value.
- Method according to any one of claims 1 to 3, characterised in that the predefined correction function consists of an interpolation of two performance characteristics obtained during calibration.
- Method according to any one of the preceding claims for a coil ignition system with distributor coil and spark plug, characterised in that a default value and a corrected value for the charge time of the distributor coil are used as the default value and corrected value for the ignition energy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003115283 DE10315283B3 (en) | 2003-04-03 | 2003-04-03 | Optimization method for ignition of air-fuel mixture for instant starting of fuel injection IC engine without using electric starter motor e.g. for automobile with start-stop operating mode |
| DE10315283 | 2003-04-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1464834A1 EP1464834A1 (en) | 2004-10-06 |
| EP1464834B1 true EP1464834B1 (en) | 2006-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040100978 Expired - Fee Related EP1464834B1 (en) | 2003-04-03 | 2004-03-10 | Method for optimizing the ignition of an air-fuel mixture for direct-start of combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1464834B1 (en) |
| DE (2) | DE10315283B3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2941501B1 (en) * | 2009-01-28 | 2011-08-12 | Renault Sas | SYSTEM AND METHOD FOR CONTROLLING THE STARTING OF AN INTERNAL COMBUSTION ENGINE |
| DE102017010300A1 (en) | 2017-11-07 | 2019-05-09 | Daimler Ag | Method for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2825830C3 (en) * | 1978-06-13 | 1993-12-02 | Bosch Gmbh Robert | Ignition device for internal combustion engines |
| JPS58140475A (en) * | 1982-02-15 | 1983-08-20 | Nippon Denso Co Ltd | Ignition device for internal-combustion engine |
| NL9300554A (en) | 1993-03-29 | 1994-10-17 | Doctro A V V | Assembly of filter device and a replaceable filter; as well as filter device and filter for use therein. |
| IT1269700B (en) | 1994-01-07 | 1997-04-15 | Abbott Lab | SYSTEM AND EQUIPMENT TO CONNECT AN ANESTHETIC CONTAINER TO A VAPORIZER |
| DE19741294A1 (en) * | 1997-09-19 | 1999-03-25 | Bosch Gmbh Robert | Drive for motor vehicle with internal combustion engine |
| DE19743492B4 (en) * | 1997-10-01 | 2014-02-13 | Robert Bosch Gmbh | Method for starting an internal combustion engine, in particular of a motor vehicle |
| DE19748051A1 (en) * | 1997-10-30 | 1999-05-06 | Schubert Mario | Ignition system for IC engine |
| DE10005108A1 (en) | 2000-02-07 | 2001-08-09 | W O M Gmbh Physikalisch Medizi | Device for fitting to medical equipment has an accessory connector and accessory components with a connector element complementing an accessory connector. |
| DE20113789U1 (en) | 2001-01-10 | 2002-05-23 | Braun Melsungen Ag | Medical device |
| JP3791364B2 (en) * | 2001-08-15 | 2006-06-28 | 日産自動車株式会社 | Engine ignition timing control device |
-
2003
- 2003-04-03 DE DE2003115283 patent/DE10315283B3/en not_active Expired - Fee Related
-
2004
- 2004-03-10 DE DE200450002048 patent/DE502004002048D1/en not_active Expired - Lifetime
- 2004-03-10 EP EP20040100978 patent/EP1464834B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE10315283B3 (en) | 2004-07-08 |
| DE502004002048D1 (en) | 2007-01-04 |
| EP1464834A1 (en) | 2004-10-06 |
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