EP2304208A1 - Verfahren zur bestimmung des kraftstoff-luft-verhältnisses einer verbrennungskraftmaschine - Google Patents
Verfahren zur bestimmung des kraftstoff-luft-verhältnisses einer verbrennungskraftmaschineInfo
- Publication number
- EP2304208A1 EP2304208A1 EP09765533A EP09765533A EP2304208A1 EP 2304208 A1 EP2304208 A1 EP 2304208A1 EP 09765533 A EP09765533 A EP 09765533A EP 09765533 A EP09765533 A EP 09765533A EP 2304208 A1 EP2304208 A1 EP 2304208A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- combustion engine
- internal combustion
- air
- ratio
- 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
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
- F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
-
- 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
- F02D41/008—Controlling each cylinder individually
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1458—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with determination means using an estimation
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
Definitions
- FIGS. 2 a and 2 b the suggestions of the speed curve of the crankshaft of the internal combustion engine 1 according to FIG. 2 over time are also shown.
- FIG. 2 a it becomes clear that the first injection A with an increased proportion of fuel leads to an excitation of the course of the rotational speed in such a way that the rotational speed decreases. Since the stoichiometric fuel-air ratio setpoint for this example has a value less than 1.0, further enrichment of the air-fuel ratio is achieved by the first injection A, thus further destabilizing the combustion.
- the second injection B with a reduced proportion of fuel leads to an increase in the rotational speed, since a leaning of the air-fuel ratio and thus a stabilization of the combustion takes place.
- the first injection A with an increased proportion of fuel leads to an excitation of the course of the rotational speed in such a way that the rotational speed increases.
- the stoichiometric fuel-air ratio setpoint for this example has a value greater than 1.0
- initial enrichment A enriches the air-fuel ratio and thus stabilizes combustion.
- the second injection B with a reduced proportion of fuel leads to a further leaning of the air-fuel ratio and thus to a further destabilization of the combustion and thus to reduce the speed.
- the forced by the changes in the fuel injection quantity according to the invention stimulation of the course of the rotational speed of the crankshaft or camshaft of the internal combustion engine 1 can be described by the parameter uneven running.
- the averaged uneven running is evaluated and standardized to the amplitude of the excitation and the expected torque of the internal combustion engine with completion of a pattern of targeted individual cylinder trim of the air-fuel ratio.
- the normalization parameters can be specific to operating points in characteristic diagrams be recorded.
- the now available standardized uneven running is converted for the underlying speed-load operating point via maps in the associated fuel-air ratio. It is still possible according to the invention to mittein this fuel-air ratio over different excitation or calibration pattern, in order to avoid interference effects.
- FIG. 4 shows the change in the so-called internal engine efficiency of the fuel-air ratio and how it scales with the fuel-air ratio and the amplitude of the cylinder-individual excitation or the trimming of the fuel-air ratio.
- the relationship is used that the product of the change in the efficiency of the air-fuel ratio and the so-called internal torque of the internal combustion engine 1 is proportional to the forced rough running.
- the internal torque describes the torque of the internal combustion engine 1 resulting from the combustion of the fuel.
- the value of the internal torque is thus greater than the value of the effective torque that can be tapped on the crankshaft of the internal combustion engine 1, since the effective torque takes into account the torque component resulting from unavoidable losses of an internal combustion engine 1.
- the uneven running of the internal combustion engine 1 increases with the resulting speed drop because the fuel-air ratio is shifted toward the running limit where the air-fuel ratio is too rich to burn correctly, as described in FIGS. 2 and 2a.
- the normalized uneven running an absolute value of the air-fuel ratio can be assigned.
- a determination of the actual air-fuel ratio according to FIG. 5 can take place. If, for example, the first injection A is metered into a larger proportion of fuel than corresponds to a nominal value specification of the fuel-air ratio, that is to say enrichment of the air-fuel ratio takes place in a cylinder-specific manner, the uneven running of the internal combustion engine 1 changes to values that produce a Represent an increase in speed because the air-fuel ratio is shifted counter to the direction of the running limit where the air-fuel ratio is too lean to burn properly. By normalizing the uneven running to the amplitude of the excitation and the expected torque of the internal combustion engine 1, the normalized uneven running an absolute value of the air-fuel ratio can be assigned.
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
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200810028769 DE102008028769A1 (de) | 2008-06-17 | 2008-06-17 | Verfahren zur Bestimmung des Kraftstoff-Luft-Verhältnisses einer Verbrennungskraftmaschine |
| PCT/EP2009/003954 WO2009152953A1 (de) | 2008-06-17 | 2009-06-03 | Verfahren zur bestimmung des kraftstoff-luft-verhältnisses einer verbrennungskraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2304208A1 true EP2304208A1 (de) | 2011-04-06 |
| EP2304208B1 EP2304208B1 (de) | 2016-03-23 |
Family
ID=40964984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09765533.6A Active EP2304208B1 (de) | 2008-06-17 | 2009-06-03 | Verfahren zur bestimmung des kraftstoff-luft-verhältnisses einer verbrennungskraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2304208B1 (de) |
| DE (1) | DE102008028769A1 (de) |
| WO (1) | WO2009152953A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012101607A1 (de) | 2012-02-28 | 2013-08-29 | Zylum Beteiligungsgesellschaft Mbh & Co. Patente Ii Kg | Verbessertes Verfahren zur Abtrennung von NOx aus einem epoxidhaltigen Gasstrom |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE468998B (sv) | 1992-02-20 | 1993-04-26 | Electrolux Ab | Foergasarstyrning |
| SE9302769D0 (sv) | 1993-08-27 | 1993-08-27 | Electrolux Ab | Motorstyrning |
| FR2739142B1 (fr) | 1995-09-27 | 1997-12-05 | Siemens Automotive Sa | Procede de controle de la richesse d'un melange air / carburant alimentant un moteur a combustion interne et dispositif correspondant |
| US5690072A (en) | 1996-12-13 | 1997-11-25 | Ford Global Technologies, Inc. | Method and system for determining and controlling a/f ratio in lean engines |
| US5915359A (en) * | 1996-12-13 | 1999-06-29 | Ford Global Technologies, Inc. | Method and system for determining and controlling A/F ratio during cold start engine operation |
| JP2000130225A (ja) * | 1998-10-21 | 2000-05-09 | Sanshin Ind Co Ltd | エンジンおよびエンジンを備えた船外機 |
| DE10231951A1 (de) * | 2001-07-16 | 2003-04-24 | Denso Corp | Steuervorrichtung für eine Verbrennungskraftmaschine |
| DE10252423A1 (de) | 2002-11-12 | 2004-05-19 | Robert Bosch Gmbh | Verfahren zur Korrektur der Anfettung eines Kraftstoff/Luft-Gemisches |
| JP4188120B2 (ja) * | 2003-03-27 | 2008-11-26 | 本田技研工業株式会社 | 内燃機関のトルク変動補正制御装置 |
| DE102004045154A1 (de) * | 2004-09-17 | 2006-03-23 | Volkswagen Ag | Verfahren und Vorrichtung zur Bestimmung eines Luft-Kraftstoff-Verhältnisses in einem Verbrennungsmotor |
| DE102007021283A1 (de) * | 2007-05-07 | 2008-11-13 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Ermittlung des Verbrennungs-Lambdawerts einer Brennkraftmaschine |
| DE102007044614B3 (de) * | 2007-09-19 | 2009-04-09 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
-
2008
- 2008-06-17 DE DE200810028769 patent/DE102008028769A1/de not_active Withdrawn
-
2009
- 2009-06-03 WO PCT/EP2009/003954 patent/WO2009152953A1/de not_active Ceased
- 2009-06-03 EP EP09765533.6A patent/EP2304208B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009152953A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009152953A1 (de) | 2009-12-23 |
| DE102008028769A1 (de) | 2009-12-24 |
| EP2304208B1 (de) | 2016-03-23 |
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