EP1336743A2 - Procédé pour forcer l'excitation du réglage de la valeur lambda - Google Patents

Procédé pour forcer l'excitation du réglage de la valeur lambda Download PDF

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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
Application number
EP03002403A
Other languages
German (de)
English (en)
Other versions
EP1336743B1 (fr
EP1336743A3 (fr
Inventor
Dietmar Ellmer
Thorsten Lauer
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1336743A2 publication Critical patent/EP1336743A2/fr
Publication of EP1336743A3 publication Critical patent/EP1336743A3/fr
Application granted granted Critical
Publication of EP1336743B1 publication Critical patent/EP1336743B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)
EP20030002403 2002-02-15 2003-02-04 Procédé pour forcer l'excitation du réglage de la valeur lambda Expired - Lifetime EP1336743B1 (fr)

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 (fr) 2003-08-20
EP1336743A3 EP1336743A3 (fr) 2006-03-15
EP1336743B1 EP1336743B1 (fr) 2006-12-20

Family

ID=7713831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030002403 Expired - Lifetime EP1336743B1 (fr) 2002-02-15 2003-02-04 Procédé pour forcer l'excitation du réglage de la valeur lambda

Country Status (2)

Country Link
EP (1) EP1336743B1 (fr)
DE (2) DE10206399C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fr) 2006-12-20
DE50306003D1 (de) 2007-02-01
EP1336743A3 (fr) 2006-03-15

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