EP0643210A1 - Method for subsequently varying an idling speed - Google Patents
Method for subsequently varying an idling speed Download PDFInfo
- Publication number
- EP0643210A1 EP0643210A1 EP93114740A EP93114740A EP0643210A1 EP 0643210 A1 EP0643210 A1 EP 0643210A1 EP 93114740 A EP93114740 A EP 93114740A EP 93114740 A EP93114740 A EP 93114740A EP 0643210 A1 EP0643210 A1 EP 0643210A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- air
- nmin
- idle
- minimum
- 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
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 16
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 238000004378 air conditioning Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- 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
- F02D41/08—Introducing corrections for particular operating conditions for idling
- F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/002—Electric control of rotation speed controlling air supply
- F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/002—Electric control of rotation speed controlling air supply
- F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
- F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass
Definitions
- the invention relates to a method for subsequently changing the idle speed in engine control systems which have an idle speed control.
- the idle speed is checked at idle. This is usually done via a continuous actuator that adjusts the amount of combustion air supplied to the engine in idle and in the area close to idle (idle air actuator).
- the intake air throughput is controlled, as described, for example, in DE 30 19 608, depending on the engine operating conditions, either in feedback or with an open control loop.
- the intake air quantity required depending on the engine operating conditions is also adjusted to the air value by means of a pilot control in the area of the idle control, which roughly corresponds to the value actually required.
- the fine adjustment is then carried out by means of a speed control, which controls the idle air actuator as a function of the difference between the actual and target speed.
- the air pilot value for the idle air volume must also be adjusted for each new speed to be set.
- the object of the present invention is therefore to provide a simple and space-saving method which makes it possible to subsequently increase the originally specified idling speed.
- This task is solved by specifying a minimum idling speed, which is valid for all engine operating parameters, a so-called “minimum speed”.
- This minimum speed is stored in a non-volatile memory that can be changed from outside (for example, a so-called EEPROM). If the engine operating parameters are such that the target speed is higher than this minimum speed, the idling speed is set to this higher value. Otherwise, the idle speed is set to this minimum speed value.
- An additional air pre-control based on an impressed minimum speed must not have the same effect in all speed ranges. For example, in the middle and upper speed range, it would unfavorably delay the speed curves when shifting.
- the air pre-control values can only be increased by specifying a minimum speed in the speed range close to the minimum speed.
- the additive air value is calculated depending on the difference between the minimum speed and the idle speed setpoint stored in the memory.
- the additive air value at higher speed is reduced via parameter B.
- Both parameters are linked in a two-dimensional map.
- FIG. 3 shows an example of the course of the additive air values ALW as a function of the engine speed N and Difference between the minimum speed NMIN and the target speed NSOLL.
- the target speed NSOLL is to be understood here to mean the speed that results when the idle air actuator is controlled with the amount of air that has been determined from characteristic diagrams as a function of the coolant temperature and any additional engine loads.
- the amount of additive air ALW increases with increasing difference NDIFF between minimum speed NMIN and target speed NSOLL, in order to be able to maintain the minimum speed when these speeds differ from one another.
- the amount of additive air ALW falls with increasing engine speed N, since an increase in the amount of air is desired only in the area near idling.
- FIG. 4 finally shows schematically the sequence of the method according to the invention.
- a basic air value BLW is read out from a map in method step S1 as a function of the current speed N of the internal combustion engine and the current throttle valve angle ⁇ .
- an additional air value ZTLW is obtained from a further map, which depends on the coolant temperature TKW and any additional loads that are currently switched on, such as an air conditioning system.
- step S3 a temperature and load-corrected air value TLW is formed from the sum of the basic air value BSW and the additional air value ZTLW.
- the setpoint idling speed NSOLL is determined from a characteristic diagram in method step S4 as a function of the coolant temperature TKW and the additional loads that are currently switched on.
- step S5 the speed difference NDIFF is now formed by, for example, the one predefined from the outside Minimum speed NMIN subtracts the idling target speed NSOLL determined above.
- an additive air value ALW depending on the size of the speed difference NDIFF and depending on the current speed is now read from a map. If the minimum speed NMIN is less than or equal to the target speed NSOLL, this additive air value ALW is zero.
- this additive air value ALW is added to the previously calculated air value TLW, so that the total air value GLW is obtained.
- step S8 the idle air actuator is then controlled in accordance with the determined total air value GLW.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur nachträglichen Veränderung der Leerlaufdrehzahl bei Motorsteuerungssystemen, die eine Leerlaufdrehzahlregelung aufweisen.The invention relates to a method for subsequently changing the idle speed in engine control systems which have an idle speed control.
In modernen Motorsteuerungssystemen erfolgt im Leerlauf eine Kontrolle der Leerlaufdrehzahl. Dies geschieht üblicherweise über ein kontinuierliches Stellglied, das im Leerlauf und im leerlaufnahen Bereich die Menge der dem Motor zugeführten Verbrennungsluft einstellt (Leerlaufluftstellglied). Die Steuerung des Ansaugluftdurchsatzes erfolgt, wie dies beispielsweise in der DE 30 19 608 beschrieben ist, in Abhängigkeit von den Motorbetriebsbedingungen entweder rückgekoppelt oder mit offenem Regelkreis. Um die Regelung zu entlasten, wird auch im Bereich der Leerlaufregelung, die abhängig von den Motorbetriebsbedingungen benötigte Ansaugluftmenge durch eine Vorsteuerung auf den Luftwert eingestellt, der dem jeweils tatsächlich benötigten Wert in etwa entspricht. Die Feineinstellung erfolgt dann durch eine Drehzahlregelung, die in Abhängigkeit von der Differenz zwischen Ist- und Solldrehzahl das Leerlaufluftstellglied entsprechend ansteuert.In modern engine control systems, the idle speed is checked at idle. This is usually done via a continuous actuator that adjusts the amount of combustion air supplied to the engine in idle and in the area close to idle (idle air actuator). The intake air throughput is controlled, as described, for example, in
Es kann nun notwendig werden, bei sich im tatsächlichen Betrieb befindenden Fahrzeugen nachträglich die über die Motorsteuerung vorgegebene Leerlaufdrehzahl anzuheben, weil beispielsweise durch Fertigungstoleranzen, Resonanzerscheinungen oder aus Komfortgründen die ursprünglich vorgegebene Drehzahl zu niedrig ist. Auch die Motorsteuerung selber kann eine Erhöhung der Leerlaufdrehzahl anfordern, beispielsweise wenn im Leerlauf viele Stromverbraucher eingeschaltet werden und dadurch die Spannung im Bordnetz stark absinkt.It may now be necessary to subsequently increase the idle speed specified via the engine control in vehicles that are actually in operation, because the originally specified speed is too low, for example due to manufacturing tolerances, resonance phenomena or for reasons of comfort. The engine control itself can also request an increase in the idle speed, for example if many electricity consumers are switched on at idle and the voltage in the on-board electrical system drops sharply as a result.
Für jede neu einzustellende Drehzahl muß der Luftvorsteuerwert für die Leerlaufluftmenge ebenfalls angepaßt werden.The air pilot value for the idle air volume must also be adjusted for each new speed to be set.
Die Aufgabe der vorliegenden Erfindung besteht daher darin, ein einfaches und speicherplatzsparendes Verfahren anzugeben, das es ermöglicht, die ursprünglich vorgegebene Leerlaufdrehzahl nachträglich anzuheben.The object of the present invention is therefore to provide a simple and space-saving method which makes it possible to subsequently increase the originally specified idling speed.
Gelöst wird diese Aufgabe, indem eine für alle Motorbetriebsparameter gültige minimale Leerlaufdrehzahl, eine sogenannte "Mindestdrehzahl" vorgegeben wird. Diese Mindestdrehzahl ist in einem von außen veränderbaren nichtflüchtigen Speicher (beispielsweise einem sogenannten EEPROM) abgelegt. Liegen die Motorbetriebsparameter so, daß die Solldrehzahl höher als diese Mindestdrehzahl ist, so wird die Leerlaufdrehzahl auf diesen höheren Wert eingestellt. Ansonsten wird die Leerlaufdrehzahl auf diesen Mindestdrehzahlwert eingestellt.This task is solved by specifying a minimum idling speed, which is valid for all engine operating parameters, a so-called "minimum speed". This minimum speed is stored in a non-volatile memory that can be changed from outside (for example, a so-called EEPROM). If the engine operating parameters are such that the target speed is higher than this minimum speed, the idling speed is set to this higher value. Otherwise, the idle speed is set to this minimum speed value.
Es ist nicht sinnvoll, den durch die Einführung der Mindestdrehzahl gegebenenfalls notwendigen Zusatzluftbedarf durch Addition einer festen Größe, also durch eine einfache Parallelverschiebung des Luftvorsteuerkennfeldes zu bewerkstelligen. Da die Luftvorsteuerwerte von der Kühlmitteltemperatur abhängig sind, wären die so erhaltenen korrigierten Luftvorsteuerwerte nur für eine Kühlmitteltemperatur korrekt. Andererseits ist es aus Speicherplatzgründen nicht wünschenswert, für jede mögliche Mindestdrehzahl eine eigene kühlmitteltemperaturabhängige Kennlinie abzuspeichern.It does not make sense to accomplish the additional air requirement that may be necessary by introducing the minimum speed by adding a fixed quantity, that is to say by simply shifting the air pilot control map in parallel. Since the air pilot values depend on the coolant temperature, the corrected air pilot values obtained in this way would only be correct for one coolant temperature. On the other hand, for storage space reasons, it is not desirable to store a separate coolant temperature-dependent characteristic curve for each possible minimum speed.
Ein weiteres Problem ergibt sich daraus, daß die Ansteuerung des Leerlaufluftstellgliedes auch in Bereichen außerhalb des Leerlaufs vorgenommen wird, beispielsweise zum Zweck der Drehzahlsteuerung bei Lastwechseln und Schaltvorgängen. Daher wird zusätzlich zum ersten Luftvorsteuerwert, der abhängig ist von der Kühlmitteltemperatur, ein weiterer Luftvorsteuerwert bestimmt, der sowohl von der Motordrehzahl als auch vom Drosselklappenöffnungswinkel abhängig ist. Diese Vorsteuerwerte sind auf die obengenannten Vorgänge (Lastwechsel, Schaltvorgänge...) abgestimmt und zwar auf die ursprünglich abgespeicherten Leerlaufsolldrehzahlen ohne Berücksichtigung der Mindestdrehzahlen.Another problem arises from the fact that the control of the idle air actuator is also carried out in areas outside of idle, for example for the purpose of speed control during load changes and switching operations. Therefore, in addition to the first air pilot value, which is dependent on the coolant temperature, another air pilot value determined, which is dependent on both the engine speed and the throttle valve opening angle. These pre-control values are matched to the above-mentioned processes (load changes, switching processes ...) and specifically to the originally stored idle speed settings without taking the minimum speeds into account.
Eine zusätzliche Luftvorsteuerung aufgrund einer eingeprägten Mindestdrehzahl darf also nicht in allen Drehzahlbereichen gleich wirken. Sie würde zum Beispiel im mittleren und oberen Drehzahlbereich die Drehzahlverläufe beim Schalten ungünstig verschleppen. Die Anhebung der Luftvorsteuerwerte durch die Vorgabe einer Mindestdrehzahl darf also nur in Drehzahlbereichen in der Nähe der Mindestdrehzahl erfolgen.An additional air pre-control based on an impressed minimum speed must not have the same effect in all speed ranges. For example, in the middle and upper speed range, it would unfavorably delay the speed curves when shifting. The air pre-control values can only be increased by specifying a minimum speed in the speed range close to the minimum speed.
Das erfindungsgemäße Verfahren löst dieses Problem, indem zu den aus den Betriebsparametern Drehzahl, Drosselklappenöffnungswinkel und Kühlmitteltemperatur berechneten Luftvorsteuerwerten, ein weiterer Luftwert addiert wird, der von folgenden zwei Parametern abhängt:
- A: Differenz aus Mindestdrehzahl und im Speicher abgelegter Leerlaufsolldrehzahl
- B: Motordrehzahl.
- A: Difference between the minimum speed and the idle speed set in the memory
- B: engine speed.
Über den Parameter A wird der additive Luftwert abhängig von der Differenz zwischen Mindestdrehzahl und im Speicher abgelegter Leerlaufsolldrehzahl berechnet.Via parameter A, the additive air value is calculated depending on the difference between the minimum speed and the idle speed setpoint stored in the memory.
Über den Parameter B wird der additive Luftwert bei höherer Drehzahl reduziert.The additive air value at higher speed is reduced via parameter B.
Die Verknüpfung beider Parameter erfolgt in einem zweidimensionalen Kennfeld.Both parameters are linked in a two-dimensional map.
Die Erfindung wird anhand der Zeichnungsfiguren im folgenden noch näher erläutert.The invention is explained in more detail below with reference to the drawing figures.
Es zeigen:
- Fig. 1:
- den Leerlaufsolldrehzahlverlauf in Abhängigkeit von der Kühlmitteltemperatur
- Fig. 2:
- den Luftbedarf in Abhängigkeit von der Kühlmitteltemperatur
- Fig. 3:
- ein Beispiel für den Verlauf der additiven Luftwerte
- Fig. 4:
- ein Ablaufdiagramm des erfindungsgemäßen Verfahrens
- Fig. 1:
- the target idling speed curve depending on the coolant temperature
- Fig. 2:
- the air requirement depending on the coolant temperature
- Fig. 3:
- an example of the course of the additive air values
- Fig. 4:
- a flowchart of the method according to the invention
In Figur 2 ist in gleicher Form wie oben schon angegeben, der Verlauf der Luftmenge LW, die für die Erreichung der Solldrehzahl NSOLL notwendig ist, in Abhängigkeit von der Kühlmitteltemperatur TKW angegeben (durchgezogene Linie). Da die Solldrehzahl NSOLL mit zunehmender Kühlmitteltemperatur TKW fällt, nimmt entsprechend auch die benötigte Luftmenge LW ab. Beim Einführen einer Mindestdrehzahl fällt die Luftmenge aber nur bis zu einer Mindestluftmenge LWMIN (strichlierte Linie) ab, wie sie zur Aufrechterhaltung dieser Mindestdrehzahl erforderlich ist (strichpunktierte Linie).In FIG. 2, in the same form as already stated above, the course of the air quantity LW, which is necessary for reaching the target speed NSOLL, is given as a function of the coolant temperature TKW (solid line). Since the target speed NSOLL falls with increasing coolant temperature TKW, the required air volume LW also decreases accordingly. When introducing a minimum speed, the air volume only drops to a minimum air volume LWMIN (dashed line), as is necessary to maintain this minimum speed (dash-dotted line).
Figur 3 zeigt ein Beispiel für den Verlauf der additiven Luftwerte ALW in Abhängigkeit von der Motordrehzahl N und der Differenz zwischen Mindestdrehzahl NMIN und der Solldrehzahl NSOLL. Unter der Solldrehzahl NSOLL ist hier die Drehzahl zu verstehen, die sich ergibt, wenn man das Leerlaufluftstellglied mit der Luftmenge ansteuert, die man aus Kennfeldern in Abhängigkeit von der Kühlmitteltemperatur und eventuellen Motorzusatzlasten ermittelt hat.FIG. 3 shows an example of the course of the additive air values ALW as a function of the engine speed N and Difference between the minimum speed NMIN and the target speed NSOLL. The target speed NSOLL is to be understood here to mean the speed that results when the idle air actuator is controlled with the amount of air that has been determined from characteristic diagrams as a function of the coolant temperature and any additional engine loads.
Man erkennt, daß die Menge der additiven Luft ALW steigt mit zunehmender Differenz NDIFF zwischen Mindestdrehzahl NMIN und Solldrehzahl NSOLL, um bei zunehmender Abweichung dieser Drehzahlen voneinander, die Mindestdrehzahl einhalten zu können. Die Menge der additiven Luft ALW fällt dagegen mit zunehmender Motordrehzahl N, da man nur im leerlaufnahen Bereich eine Anhebung der Luftmenge wünscht.It can be seen that the amount of additive air ALW increases with increasing difference NDIFF between minimum speed NMIN and target speed NSOLL, in order to be able to maintain the minimum speed when these speeds differ from one another. The amount of additive air ALW, on the other hand, falls with increasing engine speed N, since an increase in the amount of air is desired only in the area near idling.
Figur 4 zeigt schließlich schematisch den Ablauf des erfindungsgemäßen Verfahrens. Zu Verfahrensbeginn A wird im Verfahrensschritt S1 ein Basisluftwert BLW aus einem Kennfeld ausgelesen in Abhängigkeit von der aktuellen Drehzahl N der Brennkraftmaschine und dem aktuellen Drosselklappenwinkel α.Figure 4 finally shows schematically the sequence of the method according to the invention. At the start of method A, a basic air value BLW is read out from a map in method step S1 as a function of the current speed N of the internal combustion engine and the current throttle valve angle α.
Im Verfahrensschritt S2 wird aus einem weiteren Kennfeld ein Zusatzluftwert ZTLW gewonnen, der abhängt von der Kühlmitteltemperatur TKW und eventuell aktuell zugeschalteten Zusatzlasten, wie zum Beispiel eine Klimaanlage.In method step S2, an additional air value ZTLW is obtained from a further map, which depends on the coolant temperature TKW and any additional loads that are currently switched on, such as an air conditioning system.
Im Verfahrensschritt S3 wird aus der Summe des Basisluftwertes BSW und des Zusatzluftwertes ZTLW ein temperatur- und lastkorrigierter Luftwert TLW gebildet.In step S3, a temperature and load-corrected air value TLW is formed from the sum of the basic air value BSW and the additional air value ZTLW.
Aus einem Kennfeld wird im Verfahrensschritt S4 in Abhängigkeit von der Kühlmitteltemperatur TKW und aktuell zugeschalteter Zusatzlasten, die Leerlaufsolldrehzahl NSOLL ermittelt.The setpoint idling speed NSOLL is determined from a characteristic diagram in method step S4 as a function of the coolant temperature TKW and the additional loads that are currently switched on.
Im Verfahrensschritt S5 wird nun die Drehzahldifferenz NDIFF gebildet, indem man von der beispielsweise von außen vorgegebenen Mindestdrehzahl NMIN die oben ermittelte Leerlaufsolldrehzahl NSOLL subtrahiert.In step S5, the speed difference NDIFF is now formed by, for example, the one predefined from the outside Minimum speed NMIN subtracts the idling target speed NSOLL determined above.
Im Verfahrensschritt S6 wird nun aus einem Kennfeld ein additiver Luftwert ALW in Abhängigkeit von der Größe der Drehzahldifferenz NDIFF und in Abhängigkeit von der aktuellen Drehzahl ausgelesen. Wenn die Mindestdrehzahl NMIN kleiner oder gleich der Solldrehzahl NSOLL ist, so ist dieser additive Luftwert ALW gleich Null.In method step S6, an additive air value ALW depending on the size of the speed difference NDIFF and depending on the current speed is now read from a map. If the minimum speed NMIN is less than or equal to the target speed NSOLL, this additive air value ALW is zero.
Im Verfahrensschritt S7 wird dieser additive Luftwert ALW zum bisher berechneten Luftwert TLW addiert, so daß man den Gesamtluftwert GLW erhält.In method step S7, this additive air value ALW is added to the previously calculated air value TLW, so that the total air value GLW is obtained.
Im Verfahrensschritt S8 wird dann das Leerlaufluftstellglied nach Maßgabe des ermittelten Gesamtluftwertes GLW angesteuert.In method step S8, the idle air actuator is then controlled in accordance with the determined total air value GLW.
Claims (8)
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
daß die additive Luftmenge (ALW) Null ist, wenn die Solldrehzahl (NSOLL) größer oder gleich der Mindestdrehzahl (NMIN) ist.The method of claim 1
characterized,
that the additive air quantity (ALW) is zero if the target speed (NSOLL) is greater than or equal to the minimum speed (NMIN).
dadurch gekennzeichnet,
daß die Mindestdrehzahl (NMIN) von außen vorgebbar ist.The method of claim 1
characterized,
that the minimum speed (NMIN) can be specified from the outside.
dadurch gekennzeichnet,
daß die Mindestdrehzahl (NMIN) in einem nichtflüchtigen Speicher gespeichert ist.The method of claim 1
characterized,
that the minimum speed (NMIN) is stored in a non-volatile memory.
dadurch gekennzeichnet,
daß die Mindestdrehzahl (NMIN) auch durch die Motorsteuerung selbst vorgegeben werden kann.The method of claim 1
characterized,
that the minimum speed (NMIN) can also be specified by the engine control itself.
dadurch gekennzeichnet,
daß von mehreren gleichzeitig vorgegebenen Mindestdrehzahlen die jeweils höchste Drehzahl Verwendung findet.The method of claim 1
characterized,
that the highest speed is used from several simultaneously specified minimum speeds.
dadurch gekennzeichnet,
daß die Betriebsgrößen, von denen die Leerlaufdrehzahl abhängig ist, die Kühlmitteltemperatur (TKW) und der Zustand aktuell zugeschalteter Zusatzlasten sind.The method of claim 1
characterized,
that the operating variables on which the idle speed depends, the coolant temperature (TKW) and the state of the additional loads that are currently switched on.
dadurch gekennzeichnet,
daß diese Zusatzlast aus einer Klimaanlage oder aus einem Automatikgetriebe oder aus einer Kombination aus beidem besteht.Method according to claim 7
characterized,
that this additional load consists of an air conditioning system or an automatic transmission or a combination of both.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59304551T DE59304551D1 (en) | 1993-09-14 | 1993-09-14 | Procedure for the subsequent change of the idle speed |
EP19930114740 EP0643210B1 (en) | 1993-09-14 | 1993-09-14 | Method for subsequently varying an idling speed |
JP24492694A JPH0797951A (en) | 1993-09-14 | 1994-09-14 | How to change the idling speed supplementarily afterwards |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19930114740 EP0643210B1 (en) | 1993-09-14 | 1993-09-14 | Method for subsequently varying an idling speed |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0643210A1 true EP0643210A1 (en) | 1995-03-15 |
EP0643210B1 EP0643210B1 (en) | 1996-11-20 |
Family
ID=8213258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930114740 Expired - Lifetime EP0643210B1 (en) | 1993-09-14 | 1993-09-14 | Method for subsequently varying an idling speed |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0643210B1 (en) |
JP (1) | JPH0797951A (en) |
DE (1) | DE59304551D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997022790A1 (en) * | 1995-12-15 | 1997-06-26 | Orbital Engine Company (Australia) Pty. Limited | Control of fuelling of an internal combustion engine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2051420A (en) * | 1979-04-24 | 1981-01-14 | Nissan Motor | Intake air flow control system to control idling speed of an internal combustion engine |
WO1986001257A1 (en) * | 1984-08-09 | 1986-02-27 | Robert Bosch Gmbh | Method and device for controlling and/or regulating the idle-running number of revolutions of an internal combustion engine |
US4611560A (en) * | 1983-04-08 | 1986-09-16 | Mitsubishi Denki Kabushiki Kaisha | Idling speed control system of an internal combustion engine |
US4691675A (en) * | 1985-07-11 | 1987-09-08 | Mazda Motor Corp. | Idling speed control systems for internal combustion engines |
EP0459006A1 (en) * | 1990-06-01 | 1991-12-04 | Siemens Aktiengesellschaft | Arrangement for controlling the opening angle of an idle mixture regulator |
-
1993
- 1993-09-14 DE DE59304551T patent/DE59304551D1/en not_active Expired - Fee Related
- 1993-09-14 EP EP19930114740 patent/EP0643210B1/en not_active Expired - Lifetime
-
1994
- 1994-09-14 JP JP24492694A patent/JPH0797951A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2051420A (en) * | 1979-04-24 | 1981-01-14 | Nissan Motor | Intake air flow control system to control idling speed of an internal combustion engine |
US4611560A (en) * | 1983-04-08 | 1986-09-16 | Mitsubishi Denki Kabushiki Kaisha | Idling speed control system of an internal combustion engine |
WO1986001257A1 (en) * | 1984-08-09 | 1986-02-27 | Robert Bosch Gmbh | Method and device for controlling and/or regulating the idle-running number of revolutions of an internal combustion engine |
US4691675A (en) * | 1985-07-11 | 1987-09-08 | Mazda Motor Corp. | Idling speed control systems for internal combustion engines |
EP0459006A1 (en) * | 1990-06-01 | 1991-12-04 | Siemens Aktiengesellschaft | Arrangement for controlling the opening angle of an idle mixture regulator |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997022790A1 (en) * | 1995-12-15 | 1997-06-26 | Orbital Engine Company (Australia) Pty. Limited | Control of fuelling of an internal combustion engine |
US5970954A (en) * | 1995-12-15 | 1999-10-26 | Orbital Engine Company (Australia) Pty Limited | Control of fueling of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP0643210B1 (en) | 1996-11-20 |
DE59304551D1 (en) | 1997-01-02 |
JPH0797951A (en) | 1995-04-11 |
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