DE102011080243A1 - Method for starting internal combustion engine, involves selecting fuel injection timing and ignition timing of working cylinder so that torque transmitted by ignition of fuel/air mixture from cylinder to crankshaft is maximized - Google Patents
Method for starting internal combustion engine, involves selecting fuel injection timing and ignition timing of working cylinder so that torque transmitted by ignition of fuel/air mixture from cylinder to crankshaft is maximized Download PDFInfo
- Publication number
- DE102011080243A1 DE102011080243A1 DE102011080243A DE102011080243A DE102011080243A1 DE 102011080243 A1 DE102011080243 A1 DE 102011080243A1 DE 102011080243 A DE102011080243 A DE 102011080243A DE 102011080243 A DE102011080243 A DE 102011080243A DE 102011080243 A1 DE102011080243 A1 DE 102011080243A1
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- Germany
- Prior art keywords
- ignition
- working cylinder
- crankshaft
- internal combustion
- combustion engine
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- 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
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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
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
-
- 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
- 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
-
- 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
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/005—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
- F02N2019/007—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation using inertial reverse rotation
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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)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Stand der TechnikState of the art
Aus der
Offenbarung der ErfindungDisclosure of the invention
Es ist nun möglich, dass durch Zündung eines Kraftstoff-/Luft-Gemisches in dem im Arbeitstakt befindlichen Zylinder die Vorwärtsbewegung der Brennkraftmaschine definiert eingeleitet wird.It is now possible that the forward movement of the internal combustion engine is defined defined by ignition of a fuel / air mixture in the cylinder located in the working cycle.
Hierbei können Einspritzzeitpunkt und Zündzeitpunkt so gewählt werden, dass ein thermodynamischer Wirkungsgrad bei einer folgenden Verbrennung maximiert wird. Auch können Einspritzzeitpunkt und Zündzeitpunkt so gewählt werden, dass die generierte Leistung der Brennkraftmaschine maximiert wird.In this case, injection timing and ignition timing can be chosen so that a thermodynamic efficiency is maximized in a subsequent combustion. Also, injection timing and ignition timing may be selected to maximize the generated power of the engine.
Eine Schwierigkeit bei aus dem Stand der Technik bekannten Verfahren ist es, die die Vorwärtsbewegung initiierende Verbrennung derart zu gestalten, dass der Start der Brennkraftmaschine stets erfolgreich ist. Durch Kompressionsmomente von Gasfedern in den Zylindern kann es beispielsweise vorkommen, dass ein Zylinder, der sich bei Initiierung der Vorwärtsdrehung in einem Kompressionstakt befindet und durch die Vorwärtsdrehung den oberen Totpunkt überschreiten soll, um selbst in den Arbeitstakt zu gelangen, diesen oberen Totpunkt nicht überschreitet, da die Kompressionskräfte der Gasfedern die Vorwärtsdrehung der Brennkraftmaschine vorher abbremsen. Die Brennkraftmaschine würde in einem solchen Fall beispielsweise auspendeln, und nicht starten können.One difficulty with prior art methods is that the combustion initiating forward motion is such that the engine startup is always successful. By compression moments of gas springs in the cylinders, it may happen, for example, that a cylinder which is in a compression stroke at the initiation of the forward rotation and is to exceed the top dead center by the forward rotation in order to get into the power stroke itself does not exceed this top dead center. because the compression forces of the gas springs slow down the forward rotation of the internal combustion engine. The internal combustion engine would, for example, oscillate in such a case and not be able to start.
Erfindungsgemäß wurde erkannt, dass es für ein aus dem Start der Technik bekanntes Verfahren zum Starten der Brennkraftmaschine, bei dem die Brennkraftmaschine zunächst durch eine erste Verbrennung in einem ersten Zylinder rückwärts gedreht wird und anschließen durch Zündung eines Kraftstoff-/Luft-Gemisches in einem in einem Arbeitstakt befindlichen zweiten Zylinder vorwärts gedreht wird, die Wahrscheinlichkeit eines erfolgreichen Starts deutlich erhöht wird, wenn Einspritzzeitpunkt und Zündzeitpunkt so gewählt werden, dass ein Drehmoment, das durch die Verbrennung des Kraftstoff-Luft-Gemisches im zweiten Zylinder auf die Kurbelwelle übertragen wird, maximiert wird.According to the invention it has been recognized that it is for a known from the start of the art method for starting the internal combustion engine, in which the internal combustion engine is first rotated by a first combustion in a first cylinder backwards and connect by ignition of a fuel / air mixture in an in If the injection timing and ignition timing are selected to maximize torque transmitted to the crankshaft by combustion of the fuel-air mixture in the second cylinder becomes.
Dies lässt sich beispielsweise dadurch erreichen, dass ein Verbrennungsschwerpunkt im Arbeitszylinder zu einem möglichst späten Zeitpunkt der Vorwärtsdrehbewegung, also bei einem möglichst großen Kurbelwellenwinkel, erreicht wird.This can be achieved, for example, by achieving a focal point of combustion in the working cylinder at the earliest possible point in time of the forward rotational movement, that is, at the largest possible crankshaft angle.
Vorteilhaft für die Maximierung des Drehmoments ist es, wenn der Verbrennungsschwerpunkt bei Winkel der Kurbelwelle zwischen 40° und 120° liegt, noch besser zwischen 65° und 90° liegt.It is advantageous for the maximization of the torque, if the combustion center of gravity is at an angle of the crankshaft between 40 ° and 120 °, even better between 65 ° and 90 °.
Weiterhin ist es vorteilhaft, wenn die Verbrennung möglichst langsam abläuft, was durch eine möglichst homogene Vermischung des Kraftstoff-/Luft-Gemisches erreicht werden kann. Besonders einfach ist es, wenn Einspritzzeitpunkt und Zündzeitpunkt zeitlich möglichst weit auseinander liegen.Furthermore, it is advantageous if the combustion proceeds as slowly as possible, which can be achieved by the most homogeneous possible mixing of the fuel / air mixture. It is particularly simple if the time of injection and the ignition point are as far apart as possible in terms of time.
Dies kann vorteilhafterweise dadurch erreicht werden, dass die Einspritzung in den Arbeitszylinder unmittelbar nach dem Erfassen der Startanforderung erfolgt.This can advantageously be achieved in that the injection takes place in the working cylinder immediately after the detection of the start request.
Wird der Arbeitszylinder frühzeitig identifiziert, so kann die Einspritzung in den Arbeitszylinder auch bereits vor einem vorhergehenden Stillstand der Brennkraftmaschine erfolgen, was den zeitlichen Abstand zum Zündzeitpunkt weiter erhöht.If the working cylinder is identified early, the injection into the working cylinder can also take place before a previous standstill of the internal combustion engine, which further increases the time interval from the ignition point.
Gleichzeitig ist es sowohl zum Erreichen einer langsamen Verbrennung als auch allgemein für eine späte Lage der Verbrennung sinnvoll, wenn die Zündung im Arbeitszylinder spät erfolgt, beispielsweise, nachdem der Arbeitszylinder in eine Vorwärtsbewegung übergegangen ist.At the same time it makes sense both to achieve a slow combustion and generally for a late position of the combustion when the ignition in the working cylinder takes place late, for example, after the working cylinder has moved into a forward movement.
Es ist auch möglich, dass die die Zündung in dem Arbeitszylinder an einen festvorgebbaren Winkel der Kurbelwelle, beispielsweise 30°, gekoppelt wird. In diesem Fall würde erst gezündet werden, wenn die Brennkraftmaschine in ihrer Vorwärtsbewegung diese Kurbelwellenstellung überschreitet. Dies macht das Verfahren besonders einfach. It is also possible for the ignition in the working cylinder to be coupled to a predeterminable angle of the crankshaft, for example 30 °. In this case, would be ignited only when the internal combustion engine in its forward movement exceeds this crankshaft position. This makes the process particularly easy.
Vorteilhafterweise wird das erfindungsgemäße Verfahren von einem Computerprogramm durchgeführt, welches auf einem elektrisches Speichermedium für eine Steuer- und/oder Regeleinrichtung einer Brennkraftmaschine abgespeichert ist.Advantageously, the inventive method is performed by a computer program which is stored on an electrical storage medium for a control and / or regulating device of an internal combustion engine.
Die Figuren zeigen eine besonders vorteilhafte Ausführungsform des erfindungsgemäßen Verfahrens. Es zeigen: The figures show a particularly advantageous embodiment of the method according to the invention. Show it:
Beschreibung der AusführungsbeispieleDescription of the embodiments
Über ein Ansaugrohr
Über ein Direkteinspritzventil
Ein Einlassventil
Ein Zylinder durchläuft also die vier Takte in der Reihenfolge Ansaugtakt, Verdichtungstakt, Arbeitstakt, Ausstoßtakt. Im Auslauf der Brennkraftmaschine wird in dem im Arbeitstakt befindlichen Zylinder, in dem sich eine Frischluftfüllung befindet, nicht mehr gezündet, ggf. auch nicht mehr eingespritzt. Auch beim Übergang dieses Zylinders in den Ausstoßtakt hat er daher weiterhin eine Frischluftfüllung, ggf. falls in ihn noch Kraftstoff eingespritzt wurde, auch ein zündfähiges Kraftstoff-/Luft-Gemisch. Diese Frischluftfüllung (bzw. das Kraftstoff-/Luft-Gemisch) bleibt für einige Minuten im Zylinder, bevor sie herausdiffundiert, und sich der Druck im Zylinder dem Umgebungsluftdruck anpasst.A cylinder thus passes through the four cycles in the order intake stroke, compression stroke, power stroke, exhaust stroke. In the outlet of the internal combustion engine is no longer ignited in the cylinder located in the working cycle, in which there is a fresh air filling, possibly also no longer injected. Even with the transition of this cylinder in the exhaust stroke, he therefore continues to have a fresh air filling, possibly if it still fuel was injected in it, also an ignitable fuel / air mixture. This fresh air charge (or fuel / air mixture) stays in the cylinder for a few minutes before it diffuses out, and the pressure in the cylinder adapts to the ambient air pressure.
Das erfindungsgemäße Verfahren wird beispielsweise auf dem Steuergerät
Der Betrag M des insgesamt auf die Kurbelwelle
Der zweite Verbrennungsschwerpunktwinkel
Um den zweiten Verbrennungsschwerpunktswinkel so spät wie möglich zu legen, werden erfindungsgemäß zwei Maßnahmen durchgeführt: Zum einen wird der Zündzeitpunkt auf einen möglichst späten Zeitpunkt gelegt, zum anderen wird eine langsame Verbrennung erzeugt, die sich durch einen frühen Einspritzzeitpunkt erzeugen lässt. Ein früher Einspritzzeitpunkt bewirkt, dass sich das Kraftstoff-Luft-Gemisch im Arbeitszylinder gut durchmischt, was zu einer langsamen Verbrennung führt.In order to set the second combustion center of gravity as late as possible, two measures are carried out according to the invention: On the one hand, the ignition point is set as late as possible, on the other hand, a slow combustion is generated, which can be generated by an early injection time. An early injection time causes the fuel-air mixture in the working cylinder to mix well, resulting in slow combustion.
In Schritt
In Schritt
In Schritt
Es folgt optional Schritt
In Schritt
Durch die nun ablaufende Verbrennung im ersten Zylinder wird die Brennkraftmaschine wie in
Es folgt Schritt
In Schritt
Mit der in Schritt
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 19955857 [0001] DE 19955857 [0001]
Claims (11)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011080243A DE102011080243A1 (en) | 2011-08-02 | 2011-08-02 | Method for starting internal combustion engine, involves selecting fuel injection timing and ignition timing of working cylinder so that torque transmitted by ignition of fuel/air mixture from cylinder to crankshaft is maximized |
CN201210323777.2A CN103089510B (en) | 2011-08-02 | 2012-08-01 | For the method and apparatus controlling internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011080243A DE102011080243A1 (en) | 2011-08-02 | 2011-08-02 | Method for starting internal combustion engine, involves selecting fuel injection timing and ignition timing of working cylinder so that torque transmitted by ignition of fuel/air mixture from cylinder to crankshaft is maximized |
Publications (1)
Publication Number | Publication Date |
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DE102011080243A1 true DE102011080243A1 (en) | 2013-02-07 |
Family
ID=47553890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011080243A Withdrawn DE102011080243A1 (en) | 2011-08-02 | 2011-08-02 | Method for starting internal combustion engine, involves selecting fuel injection timing and ignition timing of working cylinder so that torque transmitted by ignition of fuel/air mixture from cylinder to crankshaft is maximized |
Country Status (2)
Country | Link |
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CN (1) | CN103089510B (en) |
DE (1) | DE102011080243A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19955857A1 (en) | 1999-11-20 | 2001-06-07 | Bosch Gmbh Robert | Method for starting an internal combustion engine, in particular a motor vehicle |
DE10020325A1 (en) * | 2000-04-26 | 2001-11-08 | Bosch Gmbh Robert | Method for starting a multi-cylinder internal combustion engine |
DE10345153A1 (en) * | 2002-09-30 | 2004-05-27 | Toyota Jidosha Kabushiki Kaisha, Toyota | Start control system of an internal combustion engine and associated start control method |
DE10306457A1 (en) * | 2003-02-17 | 2004-08-26 | Robert Bosch Gmbh | Operating method for an internal combustion engine (ICE) uses a cooling substance to absorb part of energy released in the ICE's combustion chamber during combustion of a specific amount of fuel |
DE102009046531A1 (en) * | 2009-11-09 | 2011-05-12 | Robert Bosch Gmbh | Method for starting internal combustion engine with direct injection, involves supporting direct start of internal combustion engine by electrical machine which works indirectly on crankshaft of internal combustion engine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001038728A1 (en) * | 1999-11-24 | 2001-05-31 | Mitsuba Corporation | Starter, start control device, and crank angle detector of internal combustion engine |
EP1321667A4 (en) * | 2000-09-28 | 2006-12-27 | Mitsuba Corp | Engine starter |
AU2001292288A1 (en) * | 2000-09-28 | 2002-04-08 | Mitsuba Corporation | Engine starter |
KR101060532B1 (en) * | 2006-06-13 | 2011-08-30 | 도요타 지도샤(주) | Starting control device of internal combustion engine |
-
2011
- 2011-08-02 DE DE102011080243A patent/DE102011080243A1/en not_active Withdrawn
-
2012
- 2012-08-01 CN CN201210323777.2A patent/CN103089510B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19955857A1 (en) | 1999-11-20 | 2001-06-07 | Bosch Gmbh Robert | Method for starting an internal combustion engine, in particular a motor vehicle |
DE10020325A1 (en) * | 2000-04-26 | 2001-11-08 | Bosch Gmbh Robert | Method for starting a multi-cylinder internal combustion engine |
DE10345153A1 (en) * | 2002-09-30 | 2004-05-27 | Toyota Jidosha Kabushiki Kaisha, Toyota | Start control system of an internal combustion engine and associated start control method |
DE10306457A1 (en) * | 2003-02-17 | 2004-08-26 | Robert Bosch Gmbh | Operating method for an internal combustion engine (ICE) uses a cooling substance to absorb part of energy released in the ICE's combustion chamber during combustion of a specific amount of fuel |
DE102009046531A1 (en) * | 2009-11-09 | 2011-05-12 | Robert Bosch Gmbh | Method for starting internal combustion engine with direct injection, involves supporting direct start of internal combustion engine by electrical machine which works indirectly on crankshaft of internal combustion engine |
Also Published As
Publication number | Publication date |
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CN103089510A (en) | 2013-05-08 |
CN103089510B (en) | 2016-09-14 |
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