RU2011123956A - СПОСОБ ОПРЕДЕЛЕНИЯ ВЕЛИЧИНЫ КОНЦЕНТРАЦИИ NOх ДО КАТАЛИЗАТОРА SCR В ДИЗЕЛЬНОМ ДВИГАТЕЛЕ - Google Patents

СПОСОБ ОПРЕДЕЛЕНИЯ ВЕЛИЧИНЫ КОНЦЕНТРАЦИИ NOх ДО КАТАЛИЗАТОРА SCR В ДИЗЕЛЬНОМ ДВИГАТЕЛЕ Download PDF

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RU2011123956A
RU2011123956A RU2011123956/06A RU2011123956A RU2011123956A RU 2011123956 A RU2011123956 A RU 2011123956A RU 2011123956/06 A RU2011123956/06 A RU 2011123956/06A RU 2011123956 A RU2011123956 A RU 2011123956A RU 2011123956 A RU2011123956 A RU 2011123956A
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concentration
engine
value
difference
scr
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Игорь ЗАНЕТТИ
Давид МЕРКУРИ
Марко ПЕТРОНЦИ
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ДЖИЭМ Глобал Текнолоджи Оперейшн ЛЛЦ
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    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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    • 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
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    • 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
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    • 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
    • F02D41/1463—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 downstream of exhaust gas treatment apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • 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
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    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
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    • 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
    • F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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    • 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
    • F01N2900/1614—NOx amount trapped in catalyst
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    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
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    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • 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
    • F02D41/2474—Characteristics of sensors
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
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    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/40—Engine management systems

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  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

1. Способ определения величины концентрации NOдо катализатора (60) избирательного восстановления (SCR) в дизельном двигателе (10), имеющем линию (80) выпуска, дизельный сажевый фильтр (40) и датчик (70) концентрации NOпосле катализатора (60) SCR, при осуществлении которого:рассчитывают величину концентрации NOдо катализатора (60) SCR в зависимости, по меньшей мере, от двух параметров двигателя,измеряют концентрацию NOпосле катализатора (60) SCR,вычисляют разность Zмежду расчетной величиной концентрации NOи измеренной величиной и, если упомянутая разность превышает заданный предел,корректируют расчетную величину концентрации NOс помощью величины коррекции концентрации, которую вычисляют с использованием таблицы поправок, в которой упомянутые, по меньшей мере, два параметра двигателя и упомянутая разность Zсоотнесены с упомянутой величиной коррекции концентрации NO.2. Способ по п.1, в котором вычисление разности Zосуществляют после процесса регенерации DPF (40).3. Способ по п.1, в котором разность Zкорректируют согласно уравнению:в которомобозначает измеренную величину NO, σобозначает стандартное отклонение датчика измеренных величин, NOобозначает расчетную величину концентрации NO, а х и у обозначают упомянутые два параметра двигателя.4. Способ по п.1, в котором таблицу поправок заново вычисляют в зависимости от определяемой опытным путем частоты обновления α (альфа).5. Способ по п.1, в котором, по меньшей мере, двумя параметрами двигателя являются частота вращения двигателя и нагрузка двигателя или концентрация кислорода и температура выхлопных газов.6. Двигатель внутреннего сгорания (10), в частности дизельный двигатель, имеющий линию (80) в�

Claims (10)

1. Способ определения величины концентрации NOx до катализатора (60) избирательного восстановления (SCR) в дизельном двигателе (10), имеющем линию (80) выпуска, дизельный сажевый фильтр (40) и датчик (70) концентрации NOx после катализатора (60) SCR, при осуществлении которого:
рассчитывают величину концентрации NOx до катализатора (60) SCR в зависимости, по меньшей мере, от двух параметров двигателя,
измеряют концентрацию NOx после катализатора (60) SCR,
вычисляют разность Z(x,y) между расчетной величиной концентрации NOx и измеренной величиной и, если упомянутая разность превышает заданный предел,
корректируют расчетную величину концентрации NOx с помощью величины коррекции концентрации, которую вычисляют с использованием таблицы поправок, в которой упомянутые, по меньшей мере, два параметра двигателя и упомянутая разность Z(x,у) соотнесены с упомянутой величиной коррекции концентрации NOx.
2. Способ по п.1, в котором вычисление разности Z(x,y) осуществляют после процесса регенерации DPF (40).
3. Способ по п.1, в котором разность Z(x,y) корректируют согласно уравнению:
Figure 00000001
в котором
Figure 00000002
обозначает измеренную величину NOx, σNOх обозначает стандартное отклонение датчика измеренных величин, NOxest обозначает расчетную величину концентрации NOx, а х и у обозначают упомянутые два параметра двигателя.
4. Способ по п.1, в котором таблицу поправок заново вычисляют в зависимости от определяемой опытным путем частоты обновления α (альфа).
5. Способ по п.1, в котором, по меньшей мере, двумя параметрами двигателя являются частота вращения двигателя и нагрузка двигателя или концентрация кислорода и температура выхлопных газов.
6. Двигатель внутреннего сгорания (10), в частности дизельный двигатель, имеющий линию (80) выпуска, дизельный сажевый фильтр (40), катализатор (60) SCR, расположенный на линии (80) выпуска, и датчик (70) концентрации NOx после катализатора (60) SCR, при этом двигатель (10) содержит электронный блок (90) управления, предназначенный для осуществления способа по любому из предшествующих пунктов.
7. Компьютерная программа, содержащая компьютерный код, применимый для выполнения способа по любому из пп.1-5.
8. Компьютерный программный продукт, в котором хранится компьютерная программа по п.7.
9. Устройство управления двигателем внутреннего сгорания, содержащее электронный блок (90) управления, носитель (95) данных, связанный с электронным блоком (90) управления, и компьютерную программу по п.8, хранящуюся на носителе (95) данных.
10. Электромагнитный сигнал, модулированный для передачи последовательности битов данных, которые представляют компьютерную программу по п.7.
RU2011123956/06A 2010-06-24 2011-06-14 СПОСОБ ОПРЕДЕЛЕНИЯ ВЕЛИЧИНЫ КОНЦЕНТРАЦИИ NOх ДО КАТАЛИЗАТОРА SCR В ДИЗЕЛЬНОМ ДВИГАТЕЛЕ RU2011123956A (ru)

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GB1010627.6A GB2481433A (en) 2010-06-24 2010-06-24 Determining NOx concentration upstream of an SCR catalyst
GB1010627.6 2010-06-24

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EP2574763A1 (en) * 2011-09-30 2013-04-03 Volvo Car Corporation NOx emission estimation method and arrangement
US9921131B2 (en) * 2013-04-25 2018-03-20 International Engine Intellectual Property Company, Llc. NOx model
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