EP0860596A2 - Verfahren zur Regelung der Laufruhe eines Verbrennungsmotors - Google Patents
Verfahren zur Regelung der Laufruhe eines Verbrennungsmotors Download PDFInfo
- Publication number
- EP0860596A2 EP0860596A2 EP98101982A EP98101982A EP0860596A2 EP 0860596 A2 EP0860596 A2 EP 0860596A2 EP 98101982 A EP98101982 A EP 98101982A EP 98101982 A EP98101982 A EP 98101982A EP 0860596 A2 EP0860596 A2 EP 0860596A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- running
- combustion engine
- internal combustion
- manipulated variable
- uneven running
- 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
- 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
- F02D41/1497—With detection of the mechanical response of the engine
Definitions
- the invention relates to a method for regulating smoothness a multi-cylinder internal combustion engine depending on one Measured value of the uneven running with a control device adjustable manipulated variable to influence the smooth running behavior.
- Such methods are used in particular in internal combustion engines which work with a lean air / fuel mixture (air / fuel ratio, AFR) (lean burn engines).
- AFR air / fuel ratio
- NO x nitrogen oxides
- the formation of nitrogen oxides (NO x ) can namely be reduced by the engine working with a mixture that is as lean as possible.
- Limitations of the air / fuel mixture are limited, however, since misfires can result in misfires, which can lead to restless engine operation and, in extreme cases, to engine shutdown.
- the aim in lean operation is to run the engine with a Air / fuel ratio as high as possible (lean mixture) to operate, however, unrest noticeable by the driver should be avoided.
- the engine should thus Reduction of raw nitrogen oxide emissions as close as possible an uneven running limit. That to achieve air / fuel ratio required for this purpose can only be determined very imprecisely in advance, as the achievement the uneven running limit of a variety of parameters that partially subject to long-term or short-term drifts depends, e.g. the current engine operating parameters, the geometric properties of the combustion chambers, the quality of the mixture preparation, the condition of the Ignition system etc.
- a predetermined Air / fuel ratio must be the engine with a relative large safety margin to one of the uneven running limit corresponding air / fuel ratio are operated, which has a negative impact on raw nitrogen oxide emissions.
- the invention is based on the object such a measured value for uneven running a manipulated variable Influencing the uneven running - preferably the air / fuel ratio - to regulate such that also at changing engine operating conditions a quiet operation is achieved as close as possible to the uneven running limit.
- the procedure is also intended to regulate the Idle speed, an exhaust gas recirculation rate or at Control of the ignition angle can be used.
- the invention provides that a threshold value for uneven running is specified and the Manipulated variable in small steps in the direction of an enlarged Uneven running is adjusted when the measured value of uneven running indicates a calmer run than the threshold, and that the manipulated variable in a larger step towards a reduced uneven running is adjusted when the measured value the uneven running indicates a more uneven run than the threshold value.
- the threshold value for is thus approximated the uneven running in small steps. Is this the manipulated variable is exceeded in a larger step adjusted in the direction of reduced uneven running, so that the area of uneven running is safely left before the Driver can notice irregular running symptoms.
- the manipulated variable can adaptively in both directions changing engine operating conditions are adjusted.
- the change in the manipulated variable with a control frequency on the order of at least 1 Hz.
- a change in each work cycle can be advantageous of the internal combustion engine. This is an optimal one Adjustment of the manipulated variable even with rapid changes the engine operating conditions.
- a rotational non-uniformity value can preferably be used as the measured value for the uneven running a high-resolution crank angle sensor can be used as described in the above Way obtained from the signal of the crank angle sensor becomes.
- the air / fuel ratio of the internal combustion engine supplied mixture is used as a manipulated variable to influence the smooth running behavior.
- a Internal combustion engine with the highest possible air / fuel ratio below a predetermined unrest threshold operate. It can be expediently provided this regulation only during the lean operation of the Internal combustion engine - i.e. within a certain engine operating parameter window - perform.
- an exhaust gas recirculation rate is used as Control variable to influence the smooth running behavior.
- an exhaust gas recirculation device can be a more economical and low-emission operation of an internal combustion engine can be achieved. However, it can a too high exhaust gas recirculation rate lead to misfires, which means a regulation of the exhaust gas recirculation rate according to the invention can be avoided.
- the throttle valve position a device for metering the supplied to the internal combustion engine Air mass flow is used.
- a device for metering the supplied to the internal combustion engine Air mass flow is used.
- an electronic controllable throttle valve can be used.
- the subjective perceptibility of irregular running symptoms is not equally pronounced in all engine operating areas. It can therefore be provided according to the invention that the Threshold for uneven running by means of a functional relationship (Map) depending on the speed and the Torque of the internal combustion engine is varied.
- Map a functional relationship
- the necessary The map is preferably carried out using suitable test series certainly.
- the threshold value of uneven running can also be based on others Engine operating parameters (such as vehicle speed or the accelerator pedal position) can be varied.
- the measurement and influencing the smooth running behavior for each cylinder of the internal combustion engine takes place individually.
- the measured value of the Uneven running can be done with the crank angle sensor with little Effort for each cylinder can be determined individually, since individual irregular running symptoms appear without any problems with the respective combustion processes and thus with the correlate respective cylinders causing the uneven running to let.
- For individual influencing of the air / fuel ratio are the same for each cylinder dosing devices assigned to individual cylinders required. Overall, however, this can improve the control the cylinder with the strongest pronounced uneven running significantly influences the manipulated variable.
- FIG. 1 In the lower partial diagram of Fig. 1 is the time course an air / fuel ratio controlled according to the invention (AFR) depending on one in the diagram above shown uneven running signal.
- a rising Air / fuel ratio tends to result in a greater restlessness.
- the uneven running is by means of a Measurement of the crank angle in the one described above Determined way.
- the - in this example constant over time - threshold value for the Horizontal line representing uneven running.
- the Determination of uneven running and the subsequent change the air / fuel ratio is discrete Time intervals, namely once per revolution of the engine crankshaft.
- the air / fuel ratio increased by a predetermined amount B if the Measured value for uneven running below the threshold for the Uneven running is. If the threshold is exceeded, then the air / fuel ratio is larger than that of B. Amount A is reduced so that the uneven running area is safe is left.
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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
- Fig. 1
- ein schematisches Beispieldiagramm einer erfindungsgemäßen Regelung des Luft-/Kraftstoffverhältnisses abhängig von einem Laufunruhesignal, und
- Fig. 2
- ein Diagramm zur Erläuterung des Vorteils einer individuellen Regelung für jeden Zylinder des Verbrennungsmotors im Vergleich zu einer Regelung für alle Zylinder gemeinsam.
Claims (10)
- Verfahren zur Regelung der Laufruhe eines Mehrzylinder-Verbrennungsmotors abhängig von einem Meßwert der Laufunruhe mit einer über eine Regeleinrichtung regelbaren Stellgröße zur Beeinflussung des Laufruheverhaltens, dadurch gekennzeichnet, daß ein Schwellwert für die Laufunruhe vorgegeben ist und die Stellgröße in kleinen Schritten in Richtung einer vergrößerten Laufunruhe verstellt wird, wenn der Meßwert der Laufunruhe einen ruhigeren Lauf als der Schwellwert anzeigt, und daß die Stellgröße in einem größeren Schritt in Richtung einer verkleinerten Laufunruhe verstellt wird, wenn der Meßwert der Laufunruhe einen unruhigeren Lauf als der Schwellwert anzeigt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Veränderung der Stellgröße mit einer Regelfrequenz in einer Größenordnung von wenigstens 1 Hz erfolgt.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Meßwert für die Laufunruhe ein Drehungleichförmigkeitswert eines Kurbelwinkelsensors verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als Stellgröße zur Beeinflussung des Laufruheverhaltens das Luft-/Kraftstoffverhältnis des dem Verbrennungsmotor zugeführten Gemisches verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als Stellgröße zur Beeinflussung des Laufruheverhaltens ein Zündzeitpunkt des Verbrennungsmotors verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als Stellgröße zur Beeinflussung des Laufruheverhaltens eine Abgasrückführrate verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als Stellgröße zur Beeinflussung des Laufruheverhaltens die Drosselklappenstellung einer Einrichtung zur Dosierung des dem Verbrennungsmotor zugeführten Luftmassenstroms verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Schwellwert für die Laufunruhe mittels eines funktionalen Zusammenhangs abhängig von der Drehzahl und dem Drehmoment des Verbrennungsmotors variiert wird.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Messung und Beeinflussung des Laufruheverhaltens für alle Zylinder des Verbrennungsmotors gemeinsam erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Messung und Beeinflussung des Laufruheverhaltens für jeden Zylinder des Verbrennungsmotors individuell erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19706807A DE19706807C2 (de) | 1997-02-21 | 1997-02-21 | Verfahren zur Regelung der Laufruhe eines Verbrennungsmotors |
DE19706807 | 1997-02-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0860596A2 true EP0860596A2 (de) | 1998-08-26 |
EP0860596A3 EP0860596A3 (de) | 2000-01-26 |
EP0860596B1 EP0860596B1 (de) | 2003-05-07 |
Family
ID=7820986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98101982A Expired - Lifetime EP0860596B1 (de) | 1997-02-21 | 1998-02-05 | Verfahren zur Regelung der Laufruhe eines Verbrennungsmotors |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0860596B1 (de) |
DE (2) | DE19706807C2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001023735A1 (de) * | 1999-09-24 | 2001-04-05 | Robert Bosch Gmbh | Verbrennungsaussetzererkennungsverfahren |
FR2803877A1 (fr) * | 2000-01-17 | 2001-07-20 | Bosch Gmbh Robert | Procede et dispositif de surveillance de fonctionnement d'un clapet pour ecoulement des gaz, notamment d'un moteur a combustion interne |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10051184A1 (de) * | 2000-10-16 | 2002-04-25 | Volkswagen Ag | Verfahren zur Steuerung einer magerlauffähigen Verbrennungskraftmaschine |
DE102005010289B4 (de) * | 2005-03-02 | 2014-10-23 | Volkswagen Ag | Verfahren zur Steuerung eines Betriebs eines Hybridantriebs sowie Hybridantrieb |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3224042A1 (de) * | 1982-06-28 | 1983-12-29 | Volkswagenwerk Ag, 3180 Wolfsburg | Verfahren zur drehzahlstabilisierung, insbesondere bei leerlaufdrehzahl, einer brennkraftmaschine |
JPS6187944A (ja) * | 1984-10-05 | 1986-05-06 | Mazda Motor Corp | エンジンの制御装置 |
DE3831080A1 (de) * | 1987-09-23 | 1989-04-06 | Volkswagen Ag | Abgasrueckfuehrung fuer eine brennkraftmaschine |
DE4230344A1 (de) * | 1991-09-12 | 1993-03-25 | Japan Electronic Control Syst | Luft-/kraftstoff-verhaeltnissteuersystem fuer einen motor mit innerer verbrennung |
US5458102A (en) * | 1993-04-05 | 1995-10-17 | Unisia Jecs Corporation | Air fuel ratio control system |
DE19614568A1 (de) * | 1995-04-12 | 1996-10-17 | Honda Motor Co Ltd | Steuervorrichtung für einen Verbrennungsmotor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5021956A (en) * | 1988-04-25 | 1991-06-04 | Mazda Motor Corporation | Control systems for vehicle engines coupled with automatic transmissions |
-
1997
- 1997-02-21 DE DE19706807A patent/DE19706807C2/de not_active Expired - Fee Related
-
1998
- 1998-02-05 EP EP98101982A patent/EP0860596B1/de not_active Expired - Lifetime
- 1998-02-05 DE DE59808206T patent/DE59808206D1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3224042A1 (de) * | 1982-06-28 | 1983-12-29 | Volkswagenwerk Ag, 3180 Wolfsburg | Verfahren zur drehzahlstabilisierung, insbesondere bei leerlaufdrehzahl, einer brennkraftmaschine |
JPS6187944A (ja) * | 1984-10-05 | 1986-05-06 | Mazda Motor Corp | エンジンの制御装置 |
DE3831080A1 (de) * | 1987-09-23 | 1989-04-06 | Volkswagen Ag | Abgasrueckfuehrung fuer eine brennkraftmaschine |
DE4230344A1 (de) * | 1991-09-12 | 1993-03-25 | Japan Electronic Control Syst | Luft-/kraftstoff-verhaeltnissteuersystem fuer einen motor mit innerer verbrennung |
US5458102A (en) * | 1993-04-05 | 1995-10-17 | Unisia Jecs Corporation | Air fuel ratio control system |
DE19614568A1 (de) * | 1995-04-12 | 1996-10-17 | Honda Motor Co Ltd | Steuervorrichtung für einen Verbrennungsmotor |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 265 (M-515), 10. September 1986 (1986-09-10) & JP 61 087944 A (MAZDA MOTOR CORP), 6. Mai 1986 (1986-05-06) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001023735A1 (de) * | 1999-09-24 | 2001-04-05 | Robert Bosch Gmbh | Verbrennungsaussetzererkennungsverfahren |
GB2362219A (en) * | 1999-09-24 | 2001-11-14 | Bosch Gmbh Robert | Method for detecting combustion misses |
GB2362219B (en) * | 1999-09-24 | 2004-03-10 | Bosch Gmbh Robert | Process for detecting combustion misfires |
FR2803877A1 (fr) * | 2000-01-17 | 2001-07-20 | Bosch Gmbh Robert | Procede et dispositif de surveillance de fonctionnement d'un clapet pour ecoulement des gaz, notamment d'un moteur a combustion interne |
Also Published As
Publication number | Publication date |
---|---|
DE19706807C2 (de) | 1999-01-28 |
DE19706807A1 (de) | 1998-08-27 |
DE59808206D1 (de) | 2003-06-12 |
EP0860596A3 (de) | 2000-01-26 |
EP0860596B1 (de) | 2003-05-07 |
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