WO2014083626A1 - Dispositif de commande destiné à un moteur à combustion interne - Google Patents

Dispositif de commande destiné à un moteur à combustion interne Download PDF

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Publication number
WO2014083626A1
WO2014083626A1 PCT/JP2012/080697 JP2012080697W WO2014083626A1 WO 2014083626 A1 WO2014083626 A1 WO 2014083626A1 JP 2012080697 W JP2012080697 W JP 2012080697W WO 2014083626 A1 WO2014083626 A1 WO 2014083626A1
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WO
WIPO (PCT)
Prior art keywords
nox
value
correction
estimated
internal combustion
Prior art date
Application number
PCT/JP2012/080697
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English (en)
Japanese (ja)
Inventor
広偉 永澤
達弘 橋田
Original Assignee
トヨタ自動車株式会社
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 トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2012/080697 priority Critical patent/WO2014083626A1/fr
Publication of WO2014083626A1 publication Critical patent/WO2014083626A1/fr

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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
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—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 NOx content or concentration
    • F02D41/1461—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 NOx content or concentration of the exhaust gases emitted by the engine
    • 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
    • F02D41/146—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 NOx content or concentration
    • F02D41/1461—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 NOx content or concentration of the exhaust gases emitted by the engine
    • F02D41/1462—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 NOx content or concentration of the exhaust gases emitted by the engine 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
    • F02D41/02—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
    • F02D41/1466—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 a soot concentration or content
    • F02D41/1467—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 a soot concentration or content 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
    • F02D41/24—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1606—Particle filter loading or soot amount

Definitions

  • an A / F sensor 20 for detecting the air-fuel ratio (A / F) of the exhaust gas discharged from the cylinder, and in the exhaust gas discharged from the cylinder A NOx sensor 22 for detecting the NOx concentration is disposed.
  • the amount of NOx contained in the exhaust gas can be calculated based on the NOx concentration detected using the NOx sensor 22 and the exhaust gas flow rate (intake air flow rate) measured by the air flow meter 36 described later.
  • an oxidation catalyst 24 and a DPF (Diesel Particulate26Filter) 26 are sequentially installed from the upstream side in order to purify the exhaust gas.
  • the system shown in FIG. 1 includes a high pressure exhaust gas recirculation passage (HPL: High Pressure Loop) 42.
  • the HPL 42 is configured to communicate the exhaust manifold 16a located on the upstream side of the turbine 18a and the intake manifold 28a located on the downstream side of the compressor 18b.
  • An HPL-EGR valve 44 for adjusting the amount of recirculated exhaust gas (EGR gas) that flows back to the intake manifold 28a through the HPL 42 is disposed in the middle of the HPL 42.
  • a for eliminating the above difference based on the difference between the actual A / F (A / F sensor value) and the estimated A / F. / F learning value is calculated. Then, based on the calculated A / F learning value, control for eliminating the above difference (for example, adjustment of the in-cylinder oxygen concentration by adjusting the opening of the HPL-EGR valve 44) is executed. This eliminates the difference between the estimated A / F and the actual A / F.
  • the A / F correction coefficient is set to 1 when the base A / F and the estimated A / F are equal, and as the estimated A / F becomes leaner than the base A / F, the A / F correction coefficient becomes 1
  • the value is set to be smaller than 1 and as the estimated A / F becomes richer than the base A / F.
  • the A / F correction coefficient set in this way uses an estimated A / F that reflects the A / F learning value. Therefore, by reflecting the A / F correction coefficient in the basic soot discharge amount, the basic soot discharge amount is corrected so that the estimated error amount of the soot discharge amount due to the difference in A / F due to machine difference is removed. become able to.
  • FIG. 8 is a flowchart showing a routine executed by the ECU 50 in the second embodiment in order to realize the calculation of the estimated value of the soot discharge amount in the second embodiment described above.
  • the same steps as those shown in FIG. 5 in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.
  • the ECU 50 determines whether or not the A / F deviation between the estimated A / F and the actual A / F has been resolved based on whether or not the acquired A / F deviation ratio falls within a predetermined range. Is determined (step 204). As a result, if the determination in step 204 is established, it is determined that A / F learning has been completed and the A / F deviation has been eliminated. Thereafter, the processing after step 104 described above is executed.
  • FIG. 9 is a time chart for explaining an example of the operation of the internal combustion engine 10 in a situation where the routine processing shown in FIG. 8 is executed. More specifically, FIG. 9 shows a state in which the air-fuel ratio is deviated to the lean side with respect to the characteristic central engine during steady operation in which the engine speed and the fuel injection amount are constant as in FIG.
  • the internal combustion engine 10 in FIG. That is, at the start point of the period A, the A / F sensor value (actual A / F) is larger than the estimated A / F, the actual soot amount is smaller than the estimated soot amount, and the NOx sensor value (actual NOx amount) is the center of the characteristic. It is larger than the estimated NOx median value (estimated NOx amount) that is a value at the engine.
  • the steady operation is in progress.
  • the NOx correction is started on the condition that the NOx sensor value is stable.
  • the difference between the NOx sensor value (actual NOx amount) and the estimated NOx median value (estimated NOx amount) at the start of NOx correction is grasped as an estimation error of the soot discharge amount due to factors other than the A / F deviation.
  • the NOx correction coefficient is reflected in the calculation of the estimated soot by performing the NOx correction, so that the estimation error of the soot discharge amount due to factors other than the A / F deviation is eliminated.
  • the onboard soot estimation models 60 and 80 for estimating the discharge amount of soot discharged from the cylinder have been described as examples.
  • the present invention is applied to an apparatus for estimating the amount of accumulated PM on a particulate filter by integrating the soot (PM) estimated amount thus estimated in consideration of the PM collection efficiency and the like. 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)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un dispositif de commande destiné à un moteur à combustion interne, qui est équipé de : un capteur à NOx (22) disposé dans un conduit d'échappement (16) ; une unité de calcul de suie basique (62) qui calcule une quantité d'échappement de suie basique en tant que valeur conformément à l'état opérationnel du moteur à combustion interne (10) ; et une unité de calcul de coefficient de correction de NOx (74) qui calcule un coefficient de correction de NOx sur base d'une valeur de NOx obtenue en divisant la valeur du capteur à NOx par une valeur médiane de NOx estimée, ce coefficient de correction ayant pour but de mettre à jour la quantité d'échappement de suie basique.
PCT/JP2012/080697 2012-11-28 2012-11-28 Dispositif de commande destiné à un moteur à combustion interne WO2014083626A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/080697 WO2014083626A1 (fr) 2012-11-28 2012-11-28 Dispositif de commande destiné à un moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/080697 WO2014083626A1 (fr) 2012-11-28 2012-11-28 Dispositif de commande destiné à un moteur à combustion interne

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WO2014083626A1 true WO2014083626A1 (fr) 2014-06-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016125735A1 (fr) * 2015-02-06 2016-08-11 いすゞ自動車株式会社 Moteur à combustion interne et procédé d'estimation des composants de gaz d'echappement

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950805A2 (fr) * 1998-04-09 1999-10-20 Yamaha Hatsudoki Kabushiki Kaisha Unité de commande d'injection de carburant pour un moteur à combustion
JPH11294230A (ja) * 1998-04-09 1999-10-26 Yamaha Motor Co Ltd エンジンの燃料噴射制御装置
JP2004019629A (ja) * 2002-06-20 2004-01-22 Toyota Motor Corp 内燃機関の制御装置
JP2005180219A (ja) * 2003-12-16 2005-07-07 Toyota Motor Corp 内燃機関のＮＯｘ発生量推定モデルの学習方法
WO2005075803A1 (fr) * 2004-02-09 2005-08-18 Hitachi, Ltd. Unite de commande de moteur
US20060021334A1 (en) * 2004-07-30 2006-02-02 Denso Corporation Exhaust gas cleaning device for internal combustion engine
JP2007023959A (ja) * 2005-07-20 2007-02-01 Nissan Motor Co Ltd Ｐｍ堆積量推定装置
WO2008078578A1 (fr) * 2006-12-26 2008-07-03 Mitsubishi Fuso Truck And Bus Corporation Détecteur d'anomalie de purificateur de gaz d'échappement et son procédé de détection
JP2008184908A (ja) * 2007-01-26 2008-08-14 Mitsubishi Fuso Truck & Bus Corp エンジン制御装置
JP2009287410A (ja) * 2008-05-27 2009-12-10 Mitsubishi Fuso Truck & Bus Corp 内燃機関のＮＯｘ生成量推定装置
WO2011018918A1 (fr) * 2009-08-10 2011-02-17 三菱重工業株式会社 Dispositif d'estimation des émissions de particules pour moteur diesel
JP2011247214A (ja) * 2010-05-28 2011-12-08 Isuzu Motors Ltd 内燃機関の燃料噴射制御装置

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950805A2 (fr) * 1998-04-09 1999-10-20 Yamaha Hatsudoki Kabushiki Kaisha Unité de commande d'injection de carburant pour un moteur à combustion
JPH11294230A (ja) * 1998-04-09 1999-10-26 Yamaha Motor Co Ltd エンジンの燃料噴射制御装置
US6122589A (en) * 1998-04-09 2000-09-19 Yamah Hatsudoki Kabushiki Kaisha Fuel injection control system for engine
JP2004019629A (ja) * 2002-06-20 2004-01-22 Toyota Motor Corp 内燃機関の制御装置
JP2005180219A (ja) * 2003-12-16 2005-07-07 Toyota Motor Corp 内燃機関のＮＯｘ発生量推定モデルの学習方法
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WO2005075803A1 (fr) * 2004-02-09 2005-08-18 Hitachi, Ltd. Unite de commande de moteur
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JP2007023959A (ja) * 2005-07-20 2007-02-01 Nissan Motor Co Ltd Ｐｍ堆積量推定装置
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JP2008157200A (ja) * 2006-12-26 2008-07-10 Mitsubishi Fuso Truck & Bus Corp 排気浄化装置の異常検出装置
WO2008078578A1 (fr) * 2006-12-26 2008-07-03 Mitsubishi Fuso Truck And Bus Corporation Détecteur d'anomalie de purificateur de gaz d'échappement et son procédé de détection
DE112007002658T5 (de) * 2006-12-26 2009-11-05 Mitsubishi Fuso Truck and Bus Corp., Kawasaki Problemdetektionsvorrichtung und -verfahren in einer Abgasreinigungsanlage
JP2008184908A (ja) * 2007-01-26 2008-08-14 Mitsubishi Fuso Truck & Bus Corp エンジン制御装置
JP2009287410A (ja) * 2008-05-27 2009-12-10 Mitsubishi Fuso Truck & Bus Corp 内燃機関のＮＯｘ生成量推定装置
WO2011018918A1 (fr) * 2009-08-10 2011-02-17 三菱重工業株式会社 Dispositif d'estimation des émissions de particules pour moteur diesel
JP2011058487A (ja) * 2009-08-10 2011-03-24 Mitsubishi Heavy Ind Ltd ディーゼルエンジンのｐｍ排出量推定装置
KR20120025557A (ko) * 2009-08-10 2012-03-15 미츠비시 쥬고교 가부시키가이샤 디젤 엔진의 ｐｍ 배출량 추정 장치
EP2444607A1 (fr) * 2009-08-10 2012-04-25 Mitsubishi Heavy Industries, Ltd. Dispositif d'estimation des émissions de particules pour moteur diesel
JP2011247214A (ja) * 2010-05-28 2011-12-08 Isuzu Motors Ltd 内燃機関の燃料噴射制御装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016125735A1 (fr) * 2015-02-06 2016-08-11 いすゞ自動車株式会社 Moteur à combustion interne et procédé d'estimation des composants de gaz d'echappement
CN107208512A (zh) * 2015-02-06 2017-09-26 五十铃自动车株式会社 内燃机和排气气体的成分量推定方法
US20180023430A1 (en) * 2015-02-06 2018-01-25 Isuzu Motors Limited Internal combustion engine and exhaust-gas-component estimating method
EP3255257A4 (fr) * 2015-02-06 2018-06-27 Isuzu Motors Limited Moteur à combustion interne et procédé d'estimation des composants de gaz d'echappement
US10526942B2 (en) 2015-02-06 2020-01-07 Isuzu Motors Limited Internal combustion engine and exhaust-gas-component estimating method
CN107208512B (zh) * 2015-02-06 2020-03-27 五十铃自动车株式会社 内燃机和排气气体的成分量推定方法

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