EP1186765A2 - Verfahren zur Steuerung eines Verbrennungsmotors bei einem Regenerationszyklus - Google Patents
Verfahren zur Steuerung eines Verbrennungsmotors bei einem Regenerationszyklus Download PDFInfo
- Publication number
- EP1186765A2 EP1186765A2 EP01118933A EP01118933A EP1186765A2 EP 1186765 A2 EP1186765 A2 EP 1186765A2 EP 01118933 A EP01118933 A EP 01118933A EP 01118933 A EP01118933 A EP 01118933A EP 1186765 A2 EP1186765 A2 EP 1186765A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- speed
- determined
- driver
- determining
- 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
- 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
-
- 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
- F02D31/007—Electric control of rotation speed controlling fuel supply
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
Definitions
- the invention relates to a method for controlling an internal combustion engine, the predominantly in an operating mode with a lean air-fuel mixture, for Regeneration of its storage catalytic converter, however, cyclically with a rich air-fuel mixture is operated.
- a three-way catalytic converter for exhaust gas purification is not suitable for lean-burn internal combustion engines ( ⁇ >> 1), especially in stratified operation.
- ⁇ >> 1 the necessary nitrogen oxide reduction can be achieved by means of a so-called NO x storage catalytic converter.
- Such catalysts have to be cleaned cyclically in a so-called regeneration phase from the pollutants contained and stored therein. In these regeneration phases, the internal combustion engine is operated briefly with a rich air-fuel ratio ( ⁇ ⁇ 1).
- the change between the two operating modes “lean” and “rich” has one Efficiency change in the engine. Because to avoid a excessive deterioration in consumption or deterioration of emission data, the periods for the "rich” operation of the internal combustion engine and the Transition times should be as short as possible, with previous systems Compromise in comfort come, which is particularly in the form of discontinuities in the Show engine torque curve. Conventionally, during the switching phases control procedures between the different operating modes used, which in the absence of torque sensors on map and Support arithmetic variables. However, these methods are highly opposed Disturbances sensitive.
- the object of the present invention is to provide a method for controlling a Specify internal combustion engine, with the loss of comfort due to Efficiency change when switching from an operating mode with a lean Air-fuel mixture in operation with a rich air-fuel mixture be avoided.
- the speed setpoint curve becomes the actual speed actual value compared, and a correction value is generated such that at a changed injection quantity or air mass a speed according to the Set the speed setpoint curve.
- the manipulated variables in this control procedure are the amount of fuel and / or the amount of air.
- the present invention provides a so-called "closed loop" control possible with the precise adjustment of the speed to a speed setpoint curve Avoid loss of comfort. It has an advantageous effect that speed sensors generally work quite reliably. Moreover, are they usually exist in the vehicle. So there are no additional costs, such as this would be necessary in the case of a lambda control, for example requires an additional lambda sensor in front of the catalytic converters.
- the driver's request is at least met the accelerator pedal actuation.
- other parameters can also be used be used be used to provide information about the driver's request, such as for example downshifts in the transmission gear.
- a simple embodiment of the invention is characterized in that the Speed setpoint is read from a characteristic or a map in which the data are given at least as a function of the driver's request. Based on the driver's request, you may get in Dependence on other additional conditions, the speed setpoint curve to be regulated.
- a special embodiment is characterized in that the controller as so-called PI controller is formed, i.e. with a proportional and an integral element, whose output values indicate the correction variable.
- a correction quantity is determined in such a way that it simply a normal value for the injection quantity and / or a normal value for the air mass has to be added.
- the normal operation is the lean Operation designated. This means that the correction value is precisely that in rich operation changing amount of fuel or air.
- a pilot control can also be carried out in which a Pre-control value is determined, which is the normal value for the injection quantity and / or the target air mass is added during the transition of the operating modes. A control delay can thus be avoided.
- the control which is symbolically indicated by the dashed box 58 is a regeneration signal R, an actual speed signal n and a signal that denotes the fuel quantity KM.
- the Regeneration signal R indicates the presence of a regeneration phase. From the two variables speed n and fuel quantity KM is via a map 50, the the aforementioned variables are made available as input variables Correction value for rich operation determined. This correction value represents a amount of fuel added to the cylinders in addition to that of the normal Allotted fuel quantity is supplied to lean operation.
- a regeneration signal R is present at a switch 54 either a zero signal 52 or the correction signal to the output of the Switch 54 forwarded. With this output signal is in an adder 56 the setpoint for normal operation is changed. Then one gets from the adder the corrected fuel injection value with which the internal combustion engine in the rich operating mode.
- FIG. 1 A control method according to the present invention is shown in FIG. 1.
- the controller is there also shown as a dashed box and with the reference number 10 characterized.
- the controller 10 receives this as input variables Regeneration signal R and an actual speed value n.
- the controller receives 10 shows information about the driver's request FW, which in the present case consists of the Accelerator pedal actuation is determined. Procedures for this are state of the art Technology known.
- a map is created 12 a speed setpoint is read out. From this speed setpoint, the actual speed actual value n is subtracted, resulting in a Differential speed leads.
- This differential speed becomes an input of a Switch 18 supplied.
- At the other input of the switch 18 is - how in the embodiment from the prior art according to FIG. 2 - a zero signal 16 on.
- the switch 18 switches one of the two inputs on its output. If there is a regeneration cycle, then the differential speed switched through. This information is now the entrance a proportional element 20 and an integral element 22, whose Output signals in turn are fed to a summer 24. In the summer 24 results in a correcting manipulated variable with which in a further totalizer 26 the target value of the air quantity or the fuel quantity is corrected. this leads to to the corresponding setpoint for the rich operating mode.
- a pilot control value for rich operation is a summator in FIG. 1 28 fed so that the transition phase between the two modes Lean and rich can be compensated for without a control delay.
- the present control method ensures - and this is also shown in the various FIG. 3 - that a constant engine torque can be achieved due to the regulated engine speed n engine .
- the engine variables occurring during the various operating phases are air mass (FIG. 3a), fuel quantity (FIG. 3b), ⁇ value (FIG. 3c), engine speed (FIG. 3d) and engine torque (FIG. 3e) shown.
- FIGS. 3a to 3e the engine variables occurring during the various operating phases are air mass (FIG. 3a), fuel quantity (FIG. 3b), ⁇ value (FIG. 3c), engine speed (FIG. 3d) and engine torque (FIG. 3e) shown.
- FIGS. 3a to 3e the engine variables occurring during the various operating phases are air mass (FIG. 3a), fuel quantity (FIG. 3b), ⁇ value (FIG. 3c), engine speed (FIG. 3d) and engine torque (FIG. 3e) shown.
- FIGS. 3a to 3e the engine variables
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)
Abstract
Description
- Fig. 1
- ein Regeldiagramm für ein Regelverfahren gemäß der vorliegenden Erfindung,
- Fig. 2
- ein Diagramm, welches eine Steuerung gemäß dem Stand der Technik darstellt und
- Fig. 3a bis 3e
- Diagramme, welche die Luftmasse, den Kraftstoff, den λ-Wert, die Motordrehzahl und das Motormoment über einen bestimmten zeitlichen Verlauf zeigen.
Claims (8)
- Verfahren zur Steuerung eines Verbrennungsmotors der überwiegend in einer Betriebsart mit einem mageren Luft-Kraftstoff-Gemisch (λ>>1), zur Regeneration seines Speicherkatalysators jedoch zyklisch mit einem fetten Luft-Kraftstoff-Gemisch (λ<1) betrieben wird, bei dem im Regenerationsbetrieb folgende Schritte durchgeführt werden:Ermitteln eines Fahrerwunsches,Ermitteln eines Drehzahl-Sollwertes aus dem Fahrerwunsch,Ermitteln eines Drehzahl-Istwertes,Bestimmen einer Differenzdrehzahl aus dem Drehzahl-Sollwert und dem Drehzahl-Istwert,Bestimmen einer Korrekturgröße in Abhängigkeit von der Differenzdrehzahl,Korrigieren eines Wertes für die Einspritzmenge und/oder die Luftmasse in Abhängigkeit von der Korrekturgröße.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass der Fahrerwunsch zumindest aus der Fahrpedalbetätigung ermittelt wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass der Drehzahl-Sollwert aus einer Kennlinie oder einem Kennfeld ausgelesen wird, die bzw. das als Eingangsgröße zumindest den Fahrerwunsch enthält. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass die Korrekturgröße als Ausgangswert eines Proportional- und/oder Integralgliedes bestimmt ist, denen als Eingangswert die Differenzdrehzahl zur Verfügung gestellt wird. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass die Korrekturgröße als Summe der Ausgangswerte des Proportional- und Integralgliedes bestimmt ist. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Korrekturgröße zu einem Normalwert für die Einspritzmenge und/oder die Sollluftmasse addiert wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass ein Vorsteuerwert bestimmt wird, der zu Beginn der Regenerationsphase zum Normalwert für die Einspritzmenge und/oder die Sollluftmasse addiert wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Drehzahldifferenz als Eingangssignal einem Umschalter zugeführt wird, an dessen anderen Eingang ein Nullsignal anliegt und dass der Schaltzustand in Abhängigkeit von einer Information über eine stattfindende Regeneration bestimmt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044411 | 2000-09-08 | ||
DE2000144411 DE10044411A1 (de) | 2000-09-08 | 2000-09-08 | Verfahren zur Steuerung eines Verbrennungsmotors bei einem Regenerationszyklus |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1186765A2 true EP1186765A2 (de) | 2002-03-13 |
EP1186765A3 EP1186765A3 (de) | 2003-12-10 |
EP1186765B1 EP1186765B1 (de) | 2006-03-01 |
Family
ID=7655490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010118933 Expired - Lifetime EP1186765B1 (de) | 2000-09-08 | 2001-08-04 | Verfahren zur Steuerung eines Verbrennungsmotors bei einem Regenerationszyklus |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1186765B1 (de) |
DE (2) | DE10044411A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007133125A1 (en) | 2006-05-12 | 2007-11-22 | Husqvarna Aktiebolag | Method for adjusting the air-fuel ratio of an internal combustion engine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807751A2 (de) * | 1996-05-17 | 1997-11-19 | Honda Giken Kogyo Kabushiki Kaisha | Leerlaufdrehzahlsteuergerät eines Verbrennungsmotors |
DE19626536A1 (de) * | 1996-07-02 | 1998-01-15 | Daimler Benz Ag | Verfahren zur Regelung der Einspritzmenge des den Zylindern einer Brennkraftmaschine zugeführten Kraftstoffs sowie eine Einrichtung zur Durchführung dieses Verfahrens |
DE19754915A1 (de) * | 1996-12-11 | 1998-06-18 | Caterpillar Inc | Verfahren und Vorrichtung zum Betrieb eines drehzahlgesteuerten Magerverbrennungsmotors zur Verbesserung des Lastansprechens |
EP0860594A1 (de) * | 1997-02-20 | 1998-08-26 | Ford Global Technologies, Inc. | Verfahren zur Regeneration einer Stickoxidfalle im Abgassystem eines Verbrennungsmotors sowie Vorrichtung zur Durchführung des Verfahrens |
DE19844745C1 (de) * | 1998-09-29 | 1999-12-30 | Siemens Ag | Regenerationsverfahren für einen NOx-Speicherkatalysator einer Brennkraftmaschine |
DE19939050A1 (de) * | 1999-08-18 | 2001-03-08 | Volkswagen Ag | Verfahren zur Regelung eines Arbeitsmodus einer Verbrennungskraftmaschine von Kraftfahrzeugen während einer Regeneration eines Speicherkatalysators |
DE10004001A1 (de) * | 2000-01-29 | 2001-08-02 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5450722A (en) * | 1992-06-12 | 1995-09-19 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification device of internal combustion engine |
DE19744409C2 (de) * | 1997-10-08 | 2001-11-08 | Ford Global Tech Inc | Verfahren zur Regeneration einer Stickoxidfalle im Abgassystem eines Verbrennungsmotors sowie Vorrichtung zur Durchführung des Verfahrens |
DE19753718C1 (de) * | 1997-12-04 | 1999-07-08 | Daimler Chrysler Ag | Verfahren zum Betreiben eines Dieselmotors |
DE19758018A1 (de) * | 1997-12-29 | 1999-07-01 | Volkswagen Ag | Regeneration eines NOx-Speicherkatalysators eines Verbrennungsmotors |
DE19802631C1 (de) * | 1998-01-24 | 1999-07-22 | Daimler Chrysler Ag | Verfahren und Einrichtung zum Reinigen von Abgasen eines Verbrennungsmotors |
-
2000
- 2000-09-08 DE DE2000144411 patent/DE10044411A1/de not_active Withdrawn
-
2001
- 2001-08-04 DE DE50109039T patent/DE50109039D1/de not_active Expired - Lifetime
- 2001-08-04 EP EP20010118933 patent/EP1186765B1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807751A2 (de) * | 1996-05-17 | 1997-11-19 | Honda Giken Kogyo Kabushiki Kaisha | Leerlaufdrehzahlsteuergerät eines Verbrennungsmotors |
DE19626536A1 (de) * | 1996-07-02 | 1998-01-15 | Daimler Benz Ag | Verfahren zur Regelung der Einspritzmenge des den Zylindern einer Brennkraftmaschine zugeführten Kraftstoffs sowie eine Einrichtung zur Durchführung dieses Verfahrens |
DE19754915A1 (de) * | 1996-12-11 | 1998-06-18 | Caterpillar Inc | Verfahren und Vorrichtung zum Betrieb eines drehzahlgesteuerten Magerverbrennungsmotors zur Verbesserung des Lastansprechens |
EP0860594A1 (de) * | 1997-02-20 | 1998-08-26 | Ford Global Technologies, Inc. | Verfahren zur Regeneration einer Stickoxidfalle im Abgassystem eines Verbrennungsmotors sowie Vorrichtung zur Durchführung des Verfahrens |
DE19844745C1 (de) * | 1998-09-29 | 1999-12-30 | Siemens Ag | Regenerationsverfahren für einen NOx-Speicherkatalysator einer Brennkraftmaschine |
DE19939050A1 (de) * | 1999-08-18 | 2001-03-08 | Volkswagen Ag | Verfahren zur Regelung eines Arbeitsmodus einer Verbrennungskraftmaschine von Kraftfahrzeugen während einer Regeneration eines Speicherkatalysators |
DE10004001A1 (de) * | 2000-01-29 | 2001-08-02 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007133125A1 (en) | 2006-05-12 | 2007-11-22 | Husqvarna Aktiebolag | Method for adjusting the air-fuel ratio of an internal combustion engine |
EP2021606A1 (de) * | 2006-05-12 | 2009-02-11 | Husqvarna AB | Verfahren zum verstellen des luft/kraftstoffverhältnisses eines brennkraftmotors |
EP2021606A4 (de) * | 2006-05-12 | 2017-05-03 | Husqvarna AB | Verfahren zum verstellen des luft/kraftstoffverhältnisses eines brennkraftmotors |
Also Published As
Publication number | Publication date |
---|---|
EP1186765A3 (de) | 2003-12-10 |
DE10044411A1 (de) | 2002-03-21 |
EP1186765B1 (de) | 2006-03-01 |
DE50109039D1 (de) | 2006-04-27 |
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