EP0860596A2 - Méthode de commande de la stabilité de marche d'un moteur à combustion interne - Google Patents

Méthode de commande de la stabilité de marche d'un moteur à combustion interne Download PDF

Info

Publication number: EP0860596A2
Authority: EP; European Patent Office
Prior art keywords: running; combustion engine; internal combustion; manipulated variable; uneven
Prior art date: 1997-02-21
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

Application number

EP98101982A

Other languages

German (de)

English (en)

Other versions

EP0860596A3 (fr

EP0860596B1 (fr

Inventor

Guido Dickers

Patrick Dr. Phlips

Manfred Henning

Klemens Grieser

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Ford Global Technologies LLC

Original Assignee

Ford Global Technologies LLC

Priority date (The priority date 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 date listed.)

1997-02-21

Filing date

1998-02-05

Publication date

1998-08-26

1998-02-05 Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC

1998-08-26 Publication of EP0860596A2 publication Critical patent/EP0860596A2/fr

2000-01-26 Publication of EP0860596A3 publication Critical patent/EP0860596A3/fr

2003-05-07 Application granted granted Critical

2003-05-07 Publication of EP0860596B1 publication Critical patent/EP0860596B1/fr

2018-02-05 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000002485 combustion reaction Methods 0.000 title claims abstract description 31
238000000034 method Methods 0.000 title claims abstract description 17
239000000446 fuel Substances 0.000 claims abstract description 22
239000000203 mixture Substances 0.000 claims abstract description 9
MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 15
230000001105 regulatory effect Effects 0.000 abstract description 2
230000006978 adaptation Effects 0.000 abstract 1
239000007789 gas Substances 0.000 description 5
206010038743 Restlessness Diseases 0.000 description 4
238000010586 diagram Methods 0.000 description 4
230000001788 irregular Effects 0.000 description 3
238000005259 measurement Methods 0.000 description 3
208000024891 symptom Diseases 0.000 description 3
239000003054 catalyst Substances 0.000 description 2
241001136792 Alle Species 0.000 description 1
208000001431 Psychomotor Agitation Diseases 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
238000010438 heat treatment Methods 0.000 description 1
230000007774 longterm Effects 0.000 description 1
238000002360 preparation method Methods 0.000 description 1
230000000630 rising effect Effects 0.000 description 1
238000007619 statistical method 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
- F02D41/14—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)

EP98101982A 1997-02-21 1998-02-05 Méthode de commande de la stabilité de marche d'un moteur à combustion interne Expired - Lifetime EP0860596B1 (fr)

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 (fr)	1998-08-26
EP0860596A3 EP0860596A3 (fr)	2000-01-26
EP0860596B1 EP0860596B1 (fr)	2003-05-07

Family

ID=7820986

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98101982A Expired - Lifetime EP0860596B1 (fr)	1997-02-21	1998-02-05	Méthode de commande de la stabilité de marche d'un moteur à combustion interne

Country Status (2)

Country	Link
EP (1)	EP0860596B1 (fr)
DE (2)	DE19706807C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2001023735A1 (fr) *	1999-09-24	2001-04-05	Robert Bosch Gmbh	Procede de reconnaissance de rates de combustion
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)

* Cited by examiner, † Cited by third party
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3224042C2 (de) *	1982-06-28	1985-09-26	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
DE3831080C2 (de) *	1987-09-23	1996-06-20	Volkswagen Ag	Abgasrückführung für eine Brennkraftmaschine
US5021956A (en) *	1988-04-25	1991-06-04	Mazda Motor Corporation	Control systems for vehicle engines coupled with automatic transmissions
JPH0571397A (ja) *	1991-09-12	1993-03-23	Japan Electron Control Syst Co Ltd	内燃機関の空燃比制御装置
JP2835676B2 (ja) *	1993-04-05	1998-12-14	株式会社ユニシアジェックス	内燃機関の空燃比制御装置
JP3422447B2 (ja) *	1995-04-12	2003-06-30	本田技研工業株式会社	内燃機関の制御装置

1997
- 1997-02-21 DE DE19706807A patent/DE19706807C2/de not_active Expired - Fee Related
1998
- 1998-02-05 EP EP98101982A patent/EP0860596B1/fr not_active Expired - Lifetime
- 1998-02-05 DE DE59808206T patent/DE59808206D1/de not_active Expired - Lifetime

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2001023735A1 (fr) *	1999-09-24	2001-04-05	Robert Bosch Gmbh	Procede de reconnaissance de rates de combustion
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 (fr)	2000-01-26
EP0860596B1 (fr)	2003-05-07

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