JP2005133563A - 内燃機関の排気浄化装置 - Google Patents
内燃機関の排気浄化装置 Download PDFInfo
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- JP2005133563A JP2005133563A JP2003367413A JP2003367413A JP2005133563A JP 2005133563 A JP2005133563 A JP 2005133563A JP 2003367413 A JP2003367413 A JP 2003367413A JP 2003367413 A JP2003367413 A JP 2003367413A JP 2005133563 A JP2005133563 A JP 2005133563A
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- internal combustion
- combustion engine
- catalyst
- temperature
- electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/445—Differential gearing distribution type
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
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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
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0255—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/44—Drive Train control parameters related to combustion engines
- B60L2240/445—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/068—Engine exhaust temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/47—Engine emissions
- B60Y2300/476—Regeneration of particle filters
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- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2250/00—Combinations of different methods of purification
- F01N2250/12—Combinations of different methods of purification absorption or adsorption, and catalytic conversion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N3/30—Arrangements for supply of additional air
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- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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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
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- Y02T10/12—Improving ICE efficiencies
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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
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Exhaust Gas After Treatment (AREA)
- Hybrid Electric Vehicles (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
【解決手段】内燃機関の排気通路に触媒を備え、内燃機関を停止して電動モータを動力源として走行可能なハイブリッド車両における内燃機関の排気浄化装置において、触媒の温度を上昇させる触媒温度上昇手段をさらに備え、触媒の温度を上昇させる要求がなされているときに、内燃機関の運転状態が該触媒の温度を低下させる状態となった場合には、内燃機関の運転を停止し、且つ車両を走行させる場合には前記電動モータを動力源とする。
【選択図】図4
Description
ところで、NOx触媒には燃料に含まれる硫黄分が燃焼して生成される硫黄酸化物(SOx)もNOxと同じメカニズムで貯蔵される。このように貯蔵されたSOxはNOxよりも放出されにくく、NOx触媒内に蓄積される。これを硫黄被毒(SOx被毒)といい、NOx浄化率が低下するため、適宜の時期に硫黄被毒から回復させる被毒回復処理を施す必要がある。この被毒回復処理は、NOx触媒を高温(例えば600乃至650℃程度)にしつつ酸素濃度を低下させた排気をNOx触媒に流通させて行われている(例えば、特許文献1参照。)。
内燃機関の排気通路に触媒を備え、内燃機関を停止して電動モータを動力源として走行可能なハイブリッド車両における内燃機関の排気浄化装置において、
前記触媒の温度を上昇する触媒温度上昇手段をさらに備え、
前記触媒の温度を上昇させる要求がなされているときに、前記内燃機関の運転状態が該触媒の温度を低下させる状態となった場合には、内燃機関の運転を停止し、且つ車両を走行させる場合には前記電動モータを動力源とすることを特徴とする。
本実施の形態によるハイブリッド車は、内燃機関1、動力分割機構31、電動モータ32、発電機33、バッテリ34、インバータ35、車軸36、減速機37、車輪38を備えて構成されている。
この内燃機関1には、気筒内へ燃料を噴射する燃料噴射弁5が備えられている。また、内燃機関1には、燃焼室に通じる排気通路2が接続されている。この排気通路2は、下流にて大気へと通じている。
NOx触媒4は、流入する排気の酸素濃度が高いときは排気中のNOxを貯蔵し、流入する排気の酸素濃度が低下し且つ還元剤が存在するときは貯蔵していたNOxを還元する機能を有する。
して、再循環するEGRガス量を煤の発生量が最大となるよりも増加させる低温燃焼、気筒内への燃料噴射時期や回数の変更、排気中への燃料添加、リッチ空燃比で内燃機関1を運転させつつ二次空気をNOx触媒4に供給する等の方法があり、これらを行うようにしても良い。すなわち、これらを本発明における触媒温度上昇手段とすることができる。
さらに、前記ECU6は、各種アプリケーションプログラム及び各種制御マップを記憶している。
ビリティ等からの要請による。
図4は、本実施例による内燃機関停止条件変更制御のフローを示したフローチャート図である。
条件としては、NOx触媒4に貯蔵されたSOx量が規定量を超えたか等を例示することができる。ここで、SOx貯蔵量は、燃料消費量やNOxセンサからの出力信号、車両の走行距離等により求めることができる。すなわち、燃料中の硫黄成分によりNOx触媒4が被毒するので、燃料の消費量を積算してECU6に記憶させ、この燃料の消費量によりSOx貯蔵量を求めるようにしても良い。また、NOx触媒4の硫黄被毒が進行すると、NOx触媒4のNOx吸蔵能力が低下するため、NOx触媒4で貯蔵されずにNOx触媒4下流にすり抜けるNOx量が増加する。従って、NOx触媒4の下流にNOxセンサを設け、この出力信号に基づいてSOx貯蔵量を求めても良い。更に、車両走行距離に応じてSOx貯蔵量が増加するとして、該車両走行距離に基づいてSOx貯蔵量を求めても良い。
ステップS102では、内燃機関1の停止条件、すなわち電動モータ32により車両を走行させる切替条件をより高負荷若しくは高回転側、すなわち高出力側へシフトする。
このようにして、内燃機関1が低出力状態で運転されるときに起こるNOx触媒4の温
度の低下を抑制することができる。また、次回内燃機関1が始動されたときに、NOx触媒4の温度を硫黄被毒回復処理に必要となる温度まで速やかに上昇させることができる。その結果、硫黄被毒の回復を完了させるまでの時間を短縮することができ、燃費を向上させることができる。
この場合、実施例1において説明した硫黄被毒回復可能領域に代えて、フィルタ再生可能領域を設定する。ここでいう、フィルタ再生可能領域とは、フィルタ40に流入する排気の温度が高く、該フィルタ40の温度を、フィルタの再生を行うことができる温度とすることが可能な運転領域を示している。そして、このフィルタ再生可能領域内に、前記エンジンOFFで示される線が位置するように設定する。
2 排気通路
4 吸蔵還元型NOx触媒
5 燃料添加弁
6 ECU
7 アクセル開度センサ
8 クランクポジションセンサ
31 動力分割機構
32 電動モータ
33 発電機
34 バッテリ
35 インバータ
36 車軸
37 減速機
38 車輪
40 パティキュレートフィルタ
Claims (4)
- 内燃機関の排気通路に触媒を備え、内燃機関を停止して電動モータを動力源として走行可能なハイブリッド車両における内燃機関の排気浄化装置において、
前記触媒の温度を上昇する触媒温度上昇手段をさらに備え、
前記触媒の温度を上昇させる要求がなされているときに、前記内燃機関の運転状態が該触媒の温度を低下させる状態となった場合には、内燃機関の運転を停止し、且つ車両を走行させる場合には前記電動モータを動力源とすることを特徴とする内燃機関の排気浄化装置。 - 前記ハイブリッド車両は、車両の少なくとも低出力領域では電動モータにより走行し、前記触媒温度上昇手段により触媒の温度を上昇しているときには、上昇をしていないときと比較して、電動モータにより車両を走行させる領域をより高出力側に広げることを特徴とする請求項1に記載の内燃機関の排気浄化装置。
- 前記触媒は、吸蔵還元型NOx触媒であり、前記触媒の温度を上昇しているときとは、該吸蔵還元型NOx触媒の硫黄被毒を回復しているときであることを特徴とする請求項1または2に記載の内燃機関の排気浄化装置。
- 前記触媒は、パティキュレートフィルタに担持された触媒若しくはパティキュレートフィルタよりも上流に備えられた触媒であり、前記触媒の温度を上昇しているときとは、該パティキュレートフィルタに捕集された粒子状物質を酸化しているときであることを特徴とする請求項1または2に記載の内燃機関の排気浄化装置。
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FR0411224A FR2861424B1 (fr) | 2003-10-28 | 2004-10-21 | Dispositif de purification des gaz d'echappement d'un moteur a combustion interne |
DE102004052261A DE102004052261B4 (de) | 2003-10-28 | 2004-10-27 | Abgasreinigungsvorrichtung eines Verbrennungsmotors |
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JP2008230443A (ja) * | 2007-03-22 | 2008-10-02 | Toyota Motor Corp | 内燃機関の制御装置 |
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FR2861424A1 (fr) | 2005-04-29 |
DE102004052261B4 (de) | 2012-10-31 |
JP3807399B2 (ja) | 2006-08-09 |
DE102004052261A1 (de) | 2005-06-16 |
FR2861424B1 (fr) | 2007-02-16 |
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