EP1336743A2 - Verfahren zur Zwangsanregung einer Lambdaregelung - Google Patents
Verfahren zur Zwangsanregung einer Lambdaregelung Download PDFInfo
- Publication number
- EP1336743A2 EP1336743A2 EP03002403A EP03002403A EP1336743A2 EP 1336743 A2 EP1336743 A2 EP 1336743A2 EP 03002403 A EP03002403 A EP 03002403A EP 03002403 A EP03002403 A EP 03002403A EP 1336743 A2 EP1336743 A2 EP 1336743A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- lambda
- amplitude
- values
- gas packets
- 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
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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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
-
- 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
-
- 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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
-
- 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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
- F02D41/1476—Biasing of the sensor
-
- 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
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
-
- 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
- F02D41/1456—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 sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- 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
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
Definitions
- the present invention relates to a method for positive excitation with a lambda control for an internal combustion engine a catalyst, upstream and downstream of it arranged lambda probes and a control device.
- DE 43 44 892 C2 describes a control of the air / fuel mixture known, forcibly regardless of the operating state oscillates between enriched and lean states, to increase the cleaning efficiency of the catalyst.
- the invention has for its object a forced excitation To provide a reliable with simple means Avoids deterioration of the exhaust gas conversion.
- the method according to the invention is based on a so-called Fine metering of the exhaust gas composition.
- the control device determines one of the second amplitude values and an associated one Share of the second exhaust gas packets such that the signal values due to the downstream lambda sensor change these exhaust gas packages.
- the inventive method With the help of the forced stimulation the inventive method a good optimization of the exhaust gases reached.
- the additional second Amplitude value a targeted influencing of the signal values Lambda probe located downstream of the catalyst.
- the direction reversal of the signal values is preferably carried out by Addition or removal of rich or lean exhaust gas packages.
- An operating point-dependent reversal of direction is brought about, which are in regular or irregular timings Repeat intervals.
- the control device remains Freedom, the number and the lambda values of the remaining forced stimulation depending on the load and speed depending on the operating point to determine.
- the one about the first number and the second number of exhaust gas packages determined lambda value corresponds to the lambda setpoint.
- both second amplitude values are preferably lean.
- the first and second number of exhaust packs Multiple of the number of cylinders in an exhaust system with a Catalyst are provided.
- the advantage is that Cylinder inequalities in the lambda values and those of the exhaust gas composition be averaged out over the period.
- Fig. 1 shows the amplitudes of the forced excitation according to one Embodiment of the method according to the invention.
- Fig. 1 is the course of the DELTA_LAMBDA_WERTE plotted that can be added to a lambda setpoint.
- the excitation amplitude is plotted against time in milliseconds.
- Curve 10 shows the course of the amplitude values in the conventional one Forced excitation. Curve 10 has approximately a sinusoidal shape Course in which the fat / lean amplitudes over ignore rising or falling edges.
- the known forced excitation has an excitation amplitude of approximately 0.030 and a period approximately 850 ms.
- the amplitude profile according to the method according to the invention is shown as an example in curve 12.
- a first Period 14 the amplitudes 16 and 18 for the lean Suggestion given.
- two different amplitude values can also be different Numbers of exhaust gas packs can be used.
- the amplitude value 18 is larger, i.e. the resulting lambda is leaner than the amplitude value 16.
- a third amplitude value 22 subtracted from the desired lambda value.
- the lambda setpoint is less rich than one of the two amplitude values 16 and 18.
- the duration of the excitation 14 and 20 are approximate in the illustrated embodiment of equal length.
- the sequence of the three amplitude values 16, 18 and 22 is repeated the duration of the amplitude values 16 and 18 varies.
- the duration of the lean amplitude 18 shortened in the three successive periods.
- the duration of the amplitude values 18 is determined by observing the Determined by Kat probe signal. This will be an effective one Conversion through the catalyst possible without that the so-called “falling asleep" of the catalyst or a Breakthrough oxygen occurs.
- Input variables 24 and 26 are the current values for the Speed and load on.
- the input values 24 and 26 are each on the calculation modules 28 and 30.
- Calculated here Module 28 the value for the first lean excitation amplitude 16 (IP_DE_LAMB_SP_AFL).
- the second calculation module 30 calculates the value for the excitation amplitude 22 in phase the rich lambda values (IP_DE_LAMB_SP_AFR).
- the module 32 calculates the value for the second lean amplitude 18 (IP_DELTA_LAMB_AFL_COR). In addition to being dependent on Load and speed depend on the calculation of the second lean Amplitude from the output signal of an exhaust gas control device 34 from.
- the output signals of the units 28, 30, 32 are at one Switch 36 on.
- the switch 36 switches depending on that Output signal of the exhaust gas control device 34 one of the adjacent Input signals as lambda output signal 38 further.
- Dependent The input variable 40 is used in a module 42 Determines the number of segments in which the amplitude value is 18 should be applied (IP_SEG_NR_AFL_COR). When specifying the semgent time 44 becomes an even multiple of the number of cylinders or a cylinder bank selected.
- On the exhaust control device 34 are also the constants for the number of lean Segments (C_SEG_NR_AFL) and the bold segments (C_SEG_NR_AFR). The sum of the segment numbers determines the Frequency of forced stimulation, the duration with fat and lean amplitude can be different.
- the development of the catalyst signal 40 monitors. Monitoring takes place, for example, whether there are deviations in the catalyst signal 40 over several Periods occur.
- the catalyst signal can also 40 are monitored for a threshold value.
- the initial size the monitoring unit 46 is located on the exhaust gas control device 34 so that if there is a deviation in the catalyst signal 40 the control device 34 correspondingly the three amplitude values can switch.
- the output signal 48 of the exhaust gas control device 34 is also present on the module 32 so that the determination of the amplitude value 18 depending on the catalyst signal 40 can.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
- Fig. 1:
- die Amplitudenwerte für die Zwangsanregung und
- Fig. 2:
- ein schematisches Ablaufbild zur Bestimmung der Amplitudenwerte.
Claims (8)
- Verfahren zur Zwangsanregung einer Lambdaregelung für eine Brennkraftmaschine mit einem Katalysator, einem stromaufwärts und stromabwärts von diesem angeordneten Lambdasonde und einer Regeleinrichtung, das folgende Verfahrensschritte aufweist:einem Lambda-Sollwert wird für eine erste Anzahl von Abgaspaketen ein erster Amplitudenwert (22) und für eine zweite Anzahl von Abgaspaketen mindestens einen zweiten Amplitudenwert (16) überlagert,die Regeleinrichtung bestimmt eine der zweiten Amplitudenwerte (18) und einen Anteil der zweiten Abgaspakete derart, daß die Signalwerte der stromabwärts liegenden Lambdasonde sich aufgrund dieser Abgaspakete ändern.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mindestens zwei unterschiedliche zweite Amplitudenwerte (16, 18) vorgesehen sind.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine betriebsabhängige, sich wiederholende Richtungsumkehr der Signalwerte der stromabwärts angeordneten Lambdasonde durch die Abgaspakete mit dem einem der zwei Amplitudenwerte erzielt wird.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Richtungsumkehr der Signalwerte durch Hinzunahme oder Wegnahme von fetten oder mageren Abgaspaketen erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Lambdawerte gemittelt über die ersten und zweite Anzahl von Abgaspaketen einem Lambda-Sollwert entsprechen.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Anregungsamplituden (16, 18) der zweiten Anzahl der Abgaspakete mager sind.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Anzahl der ersten und zweiten Abgaspakete ein Vielfaches der Zylinderzahl sind, die in einem Abgasstrang unter Verwendung eines zugehörigen Katalysators vorgesehen sind.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Signalwerte der stromabwärts von dem Katalysator angeordneten Lambdasonde über die Anzahl der ersten und zweiten Abgaspakete gemittelt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002106399 DE10206399C1 (de) | 2002-02-15 | 2002-02-15 | Verfahren zur Zwangsanregung einer Lambdaregelung |
DE10206399 | 2002-02-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1336743A2 true EP1336743A2 (de) | 2003-08-20 |
EP1336743A3 EP1336743A3 (de) | 2006-03-15 |
EP1336743B1 EP1336743B1 (de) | 2006-12-20 |
Family
ID=7713831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030002403 Expired - Fee Related EP1336743B1 (de) | 2002-02-15 | 2003-02-04 | Verfahren zur Zwangsanregung einer Lambdaregelung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1336743B1 (de) |
DE (2) | DE10206399C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7706959B2 (en) | 2006-04-18 | 2010-04-27 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Method for adjusting the air/fuel ratio of an internal combustion engine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10340815B3 (de) | 2003-09-04 | 2004-09-23 | Siemens Ag | Verfahren zur Gemischregelung bei einer Brennkraftmaschine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4344892A1 (de) | 1992-12-29 | 1994-07-07 | Honda Motor Co Ltd | Luft-Kraftstoff-Verhältnissteuereinrichtung für eine Brennkraftmaschine |
DE19516239A1 (de) | 1995-05-03 | 1996-11-07 | Siemens Ag | Verfahren zur Parametrierung eines linearen Lambdareglers für eine Brennkraftmaschine |
DE19844994A1 (de) | 1998-09-30 | 2000-04-06 | Siemens Ag | Verfahren zur Diagnose einer stetigen Lambdasonde |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5325664A (en) * | 1991-10-18 | 1994-07-05 | Honda Giken Kogyo Kabushiki Kaisha | System for determining deterioration of catalysts of internal combustion engines |
US5524599A (en) * | 1994-01-19 | 1996-06-11 | Kong, Deceased; Hakchul H. | Fuzzy logic air/fuel controller |
-
2002
- 2002-02-15 DE DE2002106399 patent/DE10206399C1/de not_active Expired - Fee Related
-
2003
- 2003-02-04 DE DE50306003T patent/DE50306003D1/de not_active Expired - Fee Related
- 2003-02-04 EP EP20030002403 patent/EP1336743B1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4344892A1 (de) | 1992-12-29 | 1994-07-07 | Honda Motor Co Ltd | Luft-Kraftstoff-Verhältnissteuereinrichtung für eine Brennkraftmaschine |
DE19516239A1 (de) | 1995-05-03 | 1996-11-07 | Siemens Ag | Verfahren zur Parametrierung eines linearen Lambdareglers für eine Brennkraftmaschine |
DE19844994A1 (de) | 1998-09-30 | 2000-04-06 | Siemens Ag | Verfahren zur Diagnose einer stetigen Lambdasonde |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7706959B2 (en) | 2006-04-18 | 2010-04-27 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Method for adjusting the air/fuel ratio of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE10206399C1 (de) | 2003-05-22 |
EP1336743B1 (de) | 2006-12-20 |
DE50306003D1 (de) | 2007-02-01 |
EP1336743A3 (de) | 2006-03-15 |
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