EP1409865B1 - Verfahren zum zylinderindividuellen abgleich der einspirtzmenge bei brennkraftmaschinen - Google Patents

Verfahren zum zylinderindividuellen abgleich der einspirtzmenge bei brennkraftmaschinen Download PDF

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Publication number
EP1409865B1
EP1409865B1 EP02754210A EP02754210A EP1409865B1 EP 1409865 B1 EP1409865 B1 EP 1409865B1 EP 02754210 A EP02754210 A EP 02754210A EP 02754210 A EP02754210 A EP 02754210A EP 1409865 B1 EP1409865 B1 EP 1409865B1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
lambda
combustion engine
control unit
determined
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.)
Expired - Lifetime
Application number
EP02754210A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1409865A1 (de
Inventor
Rudiger Deibert
Christian Preussner
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1409865A1 publication Critical patent/EP1409865A1/de
Application granted granted Critical
Publication of EP1409865B1 publication Critical patent/EP1409865B1/de
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
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
    • 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
    • F02D41/1456—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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2438—Active learning methods
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2477—Methods of calibrating or learning characterised by the method used for learning

Definitions

  • the invention relates to a method for operating a Internal combustion engine, in particular of a motor vehicle, in which Fuel injected into the cylinders of the internal combustion engine in which the injected into the individual cylinders Amount of fuel is adjusted, and at which a lambda value In the exhaust pipe of the internal combustion engine is determined. Further relates to the invention a for carrying out this method suitable control device for an internal combustion engine.
  • the method according to claim 1 uses a method from the statistical experimental design to the influence of Injected quantities attributed to the individual cylinders the measured in the exhaust pipe, averaged over all cylinders Air ratio to determine.
  • the essential advantage of the method according to the invention is that using a single Lambda probe the optimal injection quantity for each cylinder the internal combustion engine can be determined.
  • the independent variables correspond to each cylinder individually metered injection quantities, so that the mathematical model lambda as a function of Injection quantities of the individual cylinder supplies, where Coefficients of the polynomial a weighting of influence reflect the injection quantities of the cylinders.
  • coefficients may e.g. from the under the orthogonal experimental design become. It is also possible to estimate coefficients or determined by plausibility considerations.
  • the injection quantities calculated with the model differ i.a. from the injection quantities given by the control unit from. This difference is essentially based on different combustion conditions and tolerances in the valve control or in the valves of the single cylinder and forms the correction value for Adjustment of injection quantity.
  • Another significant advantage is the ability to Injectors with much larger tolerances too use.
  • the balancing method according to the invention also allows for strongly different flow characteristics different injection valves a corresponding Adjustment of the injection quantities of the individual cylinders, whereby the optimum lambda value for an exhaust gas aftertreatment can be adjusted.
  • the proposed method is also suitable, the Cost of manufacturing corresponding injection systems at simultaneous improvement of emission behavior too reduce by using cheaper injectors with used larger tolerances and the influences of this Tolerances on the lambda value by the inventive Procedures are eliminated.
  • the invention has Matching method the advantage, not throughout the whole Operating time of the internal combustion engine or the regulating them To run control unit. This results Savings in the cycle time of the processor means of the Controller that can be used elsewhere.
  • the method consists in the determined correction values in Control unit to save and this at the next Call vehicle start. This makes it possible to work in regular intervals such as e.g. in the maintenance of the Vehicle, make a new adjustment, and the new determined correction values for further vehicle operation to provide.
  • the periodic determination of the correction values in Driving is also possible, which makes the system too on short-term changes in the properties of the Injectors, such as e.g. Contamination of a nozzle react and the injection quantities cylinder individually new situation.
  • a further embodiment of the method according to the invention is characterized in that a broadband lambda probe is used, which allows the lambda value in one Interval of 0.7 ⁇ lambda ⁇ 4 continuous to value to capture.
  • Another, particularly advantageous embodiment of inventive method provides the use of a so-called.
  • Jump probe a lambda probe with characteristic jump before.
  • Another variant of the method according to the invention sees before that the order of an orthogonal design underlying regression polynomial depending on lambda is selected. If after a calibration process with a regression polynomial of lesser order the desired one Value of lambda can not be regulated with sufficient accuracy can, it is possible in this embodiment, a Regression polynomial of higher order to choose the Accuracy of the matching process to improve.
  • the inventive method in the form of a Computer program for a control unit Internal combustion engine, in particular of a motor vehicle, is provided.
  • the computer program is particular executable on a microprocessor and to execute the inventive method suitable.
  • the invention realized by the computer program, so this computer program in the same way the Invention represents as the method to its execution the computer program is suitable.
  • the computer program can be stored on an electrical storage medium be, for example on a flash memory or a Read-only memory.
  • an internal combustion engine 1 is a Motor vehicle shown, in which a piston 2 in a Cylinder 3 is reciprocable.
  • the cylinder 3 is with a combustion chamber 4 provided, inter alia, by the Piston 2, an intake valve 5 and an exhaust valve. 6 is limited.
  • an intake valve 5 is an intake pipe. 7 and an exhaust pipe 8 is coupled to the exhaust valve 6.
  • Fuel can flow into the combustion chamber via the injection valve 9 4 are injected. With the spark plug 10, the Fuel in the combustion chamber 4 are ignited.
  • the intake pipe 7 In the intake pipe 7 is a rotatable throttle valve 11th accommodated, via the intake pipe 7 air supplied is.
  • the amount of air supplied depends on the Angular position of the throttle valve 11.
  • the exhaust ports of the individual cylinder 3 run together in front of the catalyst 12 and form the exhaust pipe 8, in which a lambda probe 13th is appropriate.
  • the catalyst 12 is used to clean the by the combustion of the fuel resulting exhaust gases and the lambda probe 13 detects the air-fuel ratio in the exhaust pipe 8.
  • a controller 15 is of input signals 16 applied, measured by sensors operating variables represent the internal combustion engine 1. For example, that is Control unit 15 with an air mass sensor, a Speed sensor and the lambda probe 13 connected. Of Further, the control unit 15 with an accelerator pedal sensor connected, which generates a signal indicating the position of a operated by a driver accelerator pedal and thus the indicates requested torque. The control unit 15 generates Output signals 17, with which via actuators or actuators the behavior of the internal combustion engine 1 can be influenced can. For example, the control unit 15 with the Injector 9, the spark plug 10 and the throttle valve 11 and the like connected to and generates the Activation required signals.
  • the controller 15 is provided to the Control operating variables of the internal combustion engine 1 and / or to regulate.
  • the injection valve 9 in the combustion chamber 4 injected fuel mass of the Control unit 15, in particular with regard to a small Fuel consumption and / or a low Controlled pollutant development and / or regulated.
  • the control unit 15 with a Microprocessor in a storage medium, especially in a flash memory a computer program stored, which is suitable to the said To perform control and / or regulation.
  • Fig. 2 is a flow chart of a preferred Embodiment of the method according to the invention for Individual adjustment of the injection quantity with cylinder an internal combustion engine, the three Method steps a), b), c) contains.
  • the method step a) of FIG. 2 comprises the Processing of an orthogonal design, of which the first four steps a1 to a4 by way of example in the table of Fig. 3 are shown.
  • the purpose of the orthogonal design is to be as possible a few steps an analytical relationship between the Lambda value in the exhaust pipe 8 and the injection quantities of to determine individual cylinder 3.
  • lambda (Z1, Z2, Z3, Z4) b0 + b1 * Z1 + b2 * Z2 + b3 * Z3 + b4 * Z4 + b11 * Z1 * Z1 + b12 * Z1 * Z2 + b13 * Z1 * Z3 + b14 * Z1 * Z4 + ....
  • a step ai is to set the injection quantities for the four cylinders 3 to the scheme shown in Fig. 3 Z1, Z2, Z3, Change Z4 following. After that it will be in succession this change adjusting lambda value L_ai detected.
  • the change in injection quantity is indicated by '+' or '-' symbolizes, where '+' an increase in the injection quantity of the corresponding cylinder 3 by e.g. 4% and '-' one Reduction by the same value describes.
  • initial value for this change in the injection quantity is the respective for the normal operation of the internal combustion engine 1 of the Control unit 15 to use predetermined value.
  • step a1 of FIG. 3 the first three cylinders are charged with an injection quantity of only 96%, while the fourth cylinder receives 104%.
  • N + 1 equations of the above mentioned Can deliver the kind Coefficients bi, bij, bii of the regression polynomial be determined.
  • Process step c) of FIG. 2 provides for each cylinder 3 an adjustment of the predetermined by the control unit 15 Injection quantity using the correction values.
  • the accuracy of the adjustment can be increased even more, by choosing a higher-order regression polynomial.
  • the necessary increase in the injection quantity is a measure for the first lambda value.
  • correction values may be e.g. in an EEPROM memory which are often used to store Operating variables used in control units.
  • An initial implementation of the matching procedure can be direct done after the production of the motor vehicle; It is also possible, the adjustment process periodically while driving or perform maintenance at short notice Consider changes in the injection system during adjustment to be able to.

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  • 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)
EP02754210A 2001-07-11 2002-06-14 Verfahren zum zylinderindividuellen abgleich der einspirtzmenge bei brennkraftmaschinen Expired - Lifetime EP1409865B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10133555A DE10133555A1 (de) 2001-07-11 2001-07-11 Verfahren zum zylinderindividuellen Abgleich der Einspritzmenge bei Brennkraftmaschinen
DE10133555 2001-07-11
PCT/DE2002/002172 WO2003006810A1 (de) 2001-07-11 2002-06-14 Verfahren zum zylinderindividuellen abgleich der einspirtzmenge bei brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP1409865A1 EP1409865A1 (de) 2004-04-21
EP1409865B1 true EP1409865B1 (de) 2005-08-17

Family

ID=7691319

Family Applications (1)

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EP02754210A Expired - Lifetime EP1409865B1 (de) 2001-07-11 2002-06-14 Verfahren zum zylinderindividuellen abgleich der einspirtzmenge bei brennkraftmaschinen

Country Status (6)

Country Link
US (1) US6947826B2 (ja)
EP (1) EP1409865B1 (ja)
JP (1) JP2004534174A (ja)
KR (1) KR20040016976A (ja)
DE (2) DE10133555A1 (ja)
WO (1) WO2003006810A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3954887A1 (en) * 2020-08-14 2022-02-16 Transtron, Inc. Engine test method, computer program, and device
US11537507B2 (en) 2020-08-14 2022-12-27 Transtron Inc. Engine model construction method, engine model constructing apparatus, and computer-readable recording medium

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10317684B4 (de) * 2003-04-17 2015-02-12 Robert Bosch Gmbh Verfahren und Steuergerät zum Betreiben einer Brennkraftmaschine
US7237535B2 (en) * 2005-04-11 2007-07-03 Honeywell International Inc. Enhanced accuracy fuel metering system and method
DE102006004602B3 (de) * 2006-02-01 2007-05-31 Siemens Ag Verfahren und Motorsteuergerät zur Annäherung eines Vorsteuerkennfeldes eines Druckregelventils
DE102006032245B4 (de) * 2006-07-12 2008-11-06 Continental Automotive Gmbh Adaptionsverfahren einer Einspritzanlage einer Brennkraftmaschine
DE102006039378B4 (de) * 2006-08-22 2012-01-05 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer Otto-Brennkraftmaschine
EP2476888B1 (en) * 2008-01-24 2020-05-27 Mack Trucks, Inc. Method for controlling combustion in a multi-cylinder engine, and multi-cylinder engine
FR2926886B1 (fr) * 2008-01-25 2010-02-19 Peugeot Citroen Automobiles Sa Procede de generation d'un plan d'experience d'essais successifs a executer sur un banc moteur
DE102008058008B3 (de) * 2008-11-19 2010-02-18 Continental Automotive Gmbh Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102013220117B3 (de) * 2013-10-04 2014-07-17 Continental Automotive Gmbh Vorrichtung zum Betreiben einer Brennkraftmaschine

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE3800176A1 (de) * 1988-01-07 1989-07-20 Bosch Gmbh Robert Steuereinrichtung fuer eine brennkraftmaschine und verfahren zum einstellen von parametern der einrichtung
DE3816520A1 (de) * 1988-05-14 1989-11-23 Bosch Gmbh Robert Regelverfahren und -vorrichtung, insbesondere lambdaregelung
US5307276A (en) * 1991-04-25 1994-04-26 Hitachi, Ltd. Learning control method for fuel injection control system of engine
DE4418731A1 (de) * 1994-05-28 1995-11-30 Bosch Gmbh Robert Verfahren zur Steuerung/Regelung von Prozessen in einem Kraftfahrzeug
JP3729295B2 (ja) * 1996-08-29 2005-12-21 本田技研工業株式会社 内燃機関の空燃比制御装置
DE19846393A1 (de) * 1998-10-08 2000-04-13 Bayerische Motoren Werke Ag Zylinderselektive Regelung des Luft-Kraftstoff-Verhältnisses
DE19903721C1 (de) * 1999-01-30 2000-07-13 Daimler Chrysler Ag Betriebsverfahren für eine Brennkraftmaschine mit Lambdawertregelung und Brennkraftmaschine
US6148808A (en) * 1999-02-04 2000-11-21 Delphi Technologies, Inc. Individual cylinder fuel control having adaptive transport delay index
DE19945618B4 (de) * 1999-09-23 2017-06-08 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Kraftstoffzumeßsystems einer Brennkraftmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3954887A1 (en) * 2020-08-14 2022-02-16 Transtron, Inc. Engine test method, computer program, and device
US11537507B2 (en) 2020-08-14 2022-12-27 Transtron Inc. Engine model construction method, engine model constructing apparatus, and computer-readable recording medium

Also Published As

Publication number Publication date
WO2003006810A1 (de) 2003-01-23
DE50203977D1 (de) 2005-09-22
US20040231653A1 (en) 2004-11-25
US6947826B2 (en) 2005-09-20
EP1409865A1 (de) 2004-04-21
JP2004534174A (ja) 2004-11-11
KR20040016976A (ko) 2004-02-25
DE10133555A1 (de) 2003-01-30

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