JP2012136993A - 内燃機関の制御装置 - Google Patents
内燃機関の制御装置 Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 78
- 239000000779 smoke Substances 0.000 claims abstract description 158
- 238000000034 method Methods 0.000 claims description 43
- 230000033228 biological regulation Effects 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- 230000010354 integration Effects 0.000 claims description 19
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 abstract description 9
- 238000007796 conventional method Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 30
- 238000002347 injection Methods 0.000 description 25
- 239000007924 injection Substances 0.000 description 25
- 238000000746 purification Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
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- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
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- F02D2200/02—Input parameters for engine control the parameters being related to the engine
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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
- F02D41/1461—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
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- 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
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/48—EGR valve position sensors
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- 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
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Supercharger (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
【解決手段】吸気O2濃度や、排気O2濃度等に基づき、NOx排出量及びスモーク排出量のそれぞれの推定値を算出する。そして、NOx排出量の推定値をその目標値で除算することでNOx増大率を算出し、スモーク排出量の推定値をその目標値で除算することでスモーク増大率を算出する。そして、NOx増大率に対するスモーク増大率の比率をその目標値とするためのEGRアクチュエータ48aの操作量を算出し、この操作量に基づきEGRアクチュエータ48aを通電操作する。
【選択図】 図1
Description
δ=β×(ΔNOx)―α×(ΔPM)…(c1)
α=(α0^2×βi)/(α0^2×βi+β0^2×αi) …(c2)
β=(β0^2×αi)/(α0^2×βi+β0^2×αi) …(c3)
ただし、αi=Xi/(Xi+Yi)
βi=Yi/(Xi+Yi)
以下、上式(c1)を用いた制御手法の技術的意義について説明する。
なお、上記実施形態は、以下のように変更して実施してもよい。
δ=β0×Xi―α0×Yi …(c4)
・内燃機関としては、圧縮点火式内燃機関に限らず、例えば筒内直噴式ガソリンエンジン等の火花点火式内燃機関であってもよい。
Claims (8)
- 内燃機関から排気通路に排出される排気の一部を排気還流通路を介して該内燃機関の吸気通路に還流させるべく操作される外部EGR手段を備える内燃機関の燃焼制御システムに適用され、
前記内燃機関に供給される吸気中の酸素濃度と、前記内燃機関から排出される排気中の酸素濃度とを推定又は検出する処理によってこれら酸素濃度を取得する酸素濃度取得手段と、
該酸素濃度取得手段によって取得される排気中の酸素濃度に基づき、前記内燃機関のスモーク排出量について、その基準値からの現在値の増大度合いを示すスモーク増大度合いを算出する処理を行うスモーク増大度合い算出手段と、
前記酸素濃度取得手段によって取得される吸気中の酸素濃度に基づき、前記内燃機関のNOx排出量について、その基準値からの現在値の増大度合いを示すNOx増大度合いを算出する処理を行うNOx増大度合い算出手段と、
前記算出されたスモーク増大度合いと、前記算出されたNOx増大度合いとの双方を制御すべく、これら増大度合いを入力として前記外部EGR手段を操作することで前記吸気通路への排気還流量を調節する処理を行う還流処理手段とを備えることを特徴とする内燃機関の制御装置。 - 前記還流処理手段は、前記調節する処理として、前記スモーク増大度合い算出手段によって算出されたスモーク増大度合いと、前記NOx増大度合い算出手段によって算出されたNOx増大度合いとの比率をその目標値とすべく、前記排気還流量を調節する処理を行うことを特徴とする請求項1記載の内燃機関の制御装置。
- 前記内燃機関の運転状態に基づき、前記スモーク排出量及び前記NOx排出量のそれぞれの基準値として、該スモーク排出量の目標値及び該NOx排出量の目標値のそれぞれを設定する目標値設定手段を更に備えることを特徴とする請求項2記載の内燃機関の制御装置。
- 前記スモーク増大度合い算出手段は、前記算出する処理として、前記設定されたスモーク排出量の目標値に対する前記算出されたスモーク排出量の比率を前記スモーク増大度合いとして算出する処理を行うものであり、
前記NOx増大度合い算出手段は、前記算出する処理として、前記設定されたNOx排出量の目標値に対する前記算出されたNOx排出量の比率を前記NOx増大度合いとして算出する処理を行うことを特徴とする請求項3記載の内燃機関の制御装置。 - 前記目標値設定手段は、前記スモーク排出量の目標値及び前記NOx排出量の目標値のそれぞれをその規制値以下の値に設定するものであり、
前記還流処理手段は、前記算出されたスモーク排出量及び前記算出されたNOx排出量のそれぞれを前記規制値以下とするように、前記排気還流量を調節する処理を行うことを特徴とする請求項3又は4記載の内燃機関の制御装置。 - 前記スモーク排出量及び前記NOx排出量のそれぞれの都度の目標値の積算値を算出する手段と、
前記スモーク排出量の都度の値の積算値と、前記算出されたスモーク排出量の都度の目標値の積算値との比率であるスモーク積算比率を算出する手段と、
前記NOx排出量の都度の値の積算値と、前記算出されたNOx排出量の都度の目標値の積算値との比率であるNOx積算比率を算出する手段とを更に備え、
前記還流処理手段は、前記スモーク増大度合いと前記NOx増大度合いとの比率の目標値を、前記スモーク積算比率及び前記NOx積算比率に基づき可変設定することを特徴とする請求項3〜5のいずれか1項に記載の内燃機関の制御装置。 - 前記吸気通路と前記排気通路との間には、前記内燃機関に供給される吸気を過給する過給機が備えられ、
前記外部EGR手段は、前記排気通路のうち前記過給機の排気タービンの上流側と前記吸気通路とを接続する前記排気還流通路としての高圧EGR通路に設けられる絞り弁、前記排気通路の下流側であって且つ前記排気タービンの下流側と前記吸気通路とを接続する前記排気還流通路としての低圧EGR通路との接続部よりも下流側に設けられる絞り弁、及び前記吸気通路のうち該吸気通路と前記高圧EGR通路との接続部の上流側に設けられる絞り弁のうち少なくとも1つであることを特徴とする請求項1〜6のいずれか1項に記載の内燃機関の制御装置。 - 前記内燃機関は、圧縮点火式内燃機関であることを特徴とする請求項1〜7のいずれか1項に記載の内燃機関の制御装置。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015145649A (ja) * | 2014-02-04 | 2015-08-13 | 日野自動車株式会社 | Egr弁制御装置 |
JP2015165125A (ja) * | 2014-03-03 | 2015-09-17 | 株式会社豊田自動織機 | エンジンおよびエンジンの制御方法 |
JP2017096263A (ja) * | 2015-10-23 | 2017-06-01 | ネアンダー モーターズ アクチエンゲゼルシャフトNEANDER MOTORS Aktiengesellschaft | 内燃機関用の排気戻しシステム |
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SE539091C2 (sv) | 2012-10-02 | 2017-04-04 | Scania Cv Ab | Reglering av en koncentration/fraktion av ingående ämnen i en avgasström |
DE102016208236A1 (de) * | 2016-05-12 | 2017-11-30 | Volkswagen Ag | Steuerungsverfahren für einen Verbrennungsmotor, Steuergerät und Verbrennungsmotor |
FR3078746A1 (fr) * | 2018-03-08 | 2019-09-13 | Psa Automobiles Sa | Procede de pilotage d’un moteur thermique suite a des demandes de limitation des emissions d’oxydes d’azote et/ou de particules |
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JP2005233016A (ja) * | 2004-02-18 | 2005-09-02 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2006083735A (ja) * | 2004-09-15 | 2006-03-30 | Toyota Motor Corp | 内燃機関の制御装置 |
JP3767211B2 (ja) * | 1998-11-12 | 2006-04-19 | マツダ株式会社 | 筒内噴射式エンジンの制御装置 |
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JP3767211B2 (ja) * | 1998-11-12 | 2006-04-19 | マツダ株式会社 | 筒内噴射式エンジンの制御装置 |
JP2005233016A (ja) * | 2004-02-18 | 2005-09-02 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2006083735A (ja) * | 2004-09-15 | 2006-03-30 | Toyota Motor Corp | 内燃機関の制御装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015145649A (ja) * | 2014-02-04 | 2015-08-13 | 日野自動車株式会社 | Egr弁制御装置 |
JP2015165125A (ja) * | 2014-03-03 | 2015-09-17 | 株式会社豊田自動織機 | エンジンおよびエンジンの制御方法 |
JP2017096263A (ja) * | 2015-10-23 | 2017-06-01 | ネアンダー モーターズ アクチエンゲゼルシャフトNEANDER MOTORS Aktiengesellschaft | 内燃機関用の排気戻しシステム |
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DE102011089847B4 (de) | 2019-06-13 |
JP5310709B2 (ja) | 2013-10-09 |
DE102011089847A1 (de) | 2012-06-28 |
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