JP2008157192A - 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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- JP2008157192A JP2008157192A JP2006349762A JP2006349762A JP2008157192A JP 2008157192 A JP2008157192 A JP 2008157192A JP 2006349762 A JP2006349762 A JP 2006349762A JP 2006349762 A JP2006349762 A JP 2006349762A JP 2008157192 A JP2008157192 A JP 2008157192A
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- exhaust
- control mode
- control
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- egr valve
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 81
- 238000004887 air purification Methods 0.000 title abstract 2
- 230000008929 regeneration Effects 0.000 claims abstract description 37
- 238000011069 regeneration method Methods 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims description 49
- 239000007924 injection Substances 0.000 claims description 49
- 239000000446 fuel Substances 0.000 claims description 45
- 238000000746 purification Methods 0.000 claims description 16
- 239000013618 particulate matter Substances 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 96
- 238000007710 freezing Methods 0.000 description 21
- 230000008014 freezing Effects 0.000 description 21
- 239000003054 catalyst Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 19
- 230000003197 catalytic effect Effects 0.000 description 14
- 238000001514 detection method Methods 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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
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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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- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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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
- F01N13/00—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
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N13/00—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
- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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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
- F01N3/02—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
- F01N3/025—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
- 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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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
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- 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
- F01N3/0828—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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- 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
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- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
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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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
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- F02D—CONTROLLING COMBUSTION ENGINES
- 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]
- F02D41/005—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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- 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
- F02D41/028—Desulfurisation of NOx traps or adsorbent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
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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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- 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
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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- F02B2275/14—Direct injection into combustion chamber
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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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- 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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- 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
- 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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
【解決手段】フィルタ再生のための排気昇温制御では、EGR弁36の動作を利用して排気温度の上昇を図る第1制御モードと、EGR弁36を利用せずに排気温度の上昇を図る第2制御モードとが、機関運転状態に応じて切り換えられる。そして、EGR弁36が全閉位置にて一時的な固着状態になると、排気昇温制御中、通常は第2制御モードの実施される領域全体で、同第2制御モードに代えて第1制御モードが実施される。このため、EGR弁36が全閉位置での一時的な固着状態のまま第2制御モードが実施されることを回避でき、その第2制御モードの実施に起因して排気昇温制御中に排気温度をフィルタ再生を行ううえで適切に上昇させられなくなることを回避できる。
【選択図】図1
Description
上記目的を達成するため、請求項1記載の発明では、機関運転時に動作される可動部材を備えるとともに同可動部材の動作を通じて排気温度が変化する内燃機関の排気浄化装置であって、排気浄化性能の回復を図るための再生処理を行う際に内燃機関の排気温度を上昇させる排気昇温制御を実施する内燃機関の排気浄化装置において、排気昇温制御中に、前記可動部材を利用せずに排気温度の上昇を図る第1制御モードと、同可動部材の動作を通じて排気温度の上昇を図る第2制御モードと、を機関運転領域に応じて切り換える切換手段と、前記可動部材の一時的な固着状態を検出する検出手段と、前記可動部材の一時的な固着状態が検出されたとき、全機関運転領域のうち、前記第1制御モードの実施される領域を前記第2制御モードの実施される領域側に拡大するとともに、それによって前記第2制御モードの実施される領域を縮小する制御手段と、を備えた。
図1は、本実施形態の制御装置が適用される内燃機関10の構成を示している。この内燃機関10は、コモンレール方式の燃料噴射装置、及びターボチャージャ11を備えるディーゼル機関となっており、大きくは吸気通路12、燃焼室13、及び排気通路14を備えて構成されている。
なお排気通路14の上記PMフィルタ26の上流側及び下流側には、PMフィルタ26に流入する排気の温度である入ガス温度を検出する入ガス温度センサ28、及びPMフィルタ26通過後の排気の温度である出ガス温度を検出する出ガス温度センサ29がそれぞれ配設されている。また排気通路14には、上記PMフィルタ26の排気上流側とその排気下流側との差圧を検出する差圧センサ30が配設されている。更に排気通路14の上記NOx触媒コンバータ25の排気上流側、及び上記PMフィルタ26と上記酸化触媒コンバータ27との間には、排気中の酸素濃度を検出する2つの酸素センサ31、32がそれぞれ配設されている。
こうした再生処理の一つとして、例えばNOx触媒コンバータ25及びPMフィルタ26でのPMによる目詰まりを防止すべく、それらNOx触媒コンバータ25及びPMフィルタ26など排気系に堆積したPMを燃焼(酸化)させて浄化するフィルタ再生があげられる。ただし、同フィルタ再生を行うには、上記NOx触媒コンバータ25やPMフィルタ26を十分に高温化する必要がある。このため、フィルタ再生の実行時には、内燃機関10の排気温度の上昇を図る排気昇温制御を行ったうえで、上記NOx触媒コンバータ25やPMフィルタ26のNOx触媒に未燃燃料成分を供給し、触媒床温を上記PMの燃焼に必要な値(例えば600〜700℃)まで上昇される。なお、このときの触媒への未燃燃料成分の供給は、添加弁46からの排気に対する燃料添加等によって行われる。
この排気昇温制御では、内燃機関10の運転時の動作を通じて排気温度に影響を及ぼす可動部材を利用して、内燃機関10における排気温度の上昇が図られる。こうした可動部材として、本実施形態ではEGR弁36が用いられることとなる。具体的には、排気昇温制御中にEGR弁36が通常時よりも開き側の開度となるよう開度制御されてEGR量が大とされ、これにより内燃機関10の排気温度の上昇が図られる。
(1)EGR弁36が全閉位置にて一時的な固着状態になると、フィルタ再生のための排気昇温制御中、通常は第2制御モードの実施される領域全体(図2の領域B)で、同第2制御モードに代えて第1制御モードが実施され、その第1制御モードにより排気温度の上昇が図られるようになる。このため、EGR弁36が全閉位置での一時的な固着状態のまま第2制御モードが実施されることを回避でき、その第2制御モードの実施に起因して排気昇温制御中に排気温度をフィルタ再生を行ううえで適切に上昇させられなくなることを回避できる。
・EGR弁36の一時的な固着が解消したとき、第1制御モード及び第2制御モードの実施領域を必ずしも通常の状態に戻す必要はない。
Claims (5)
- 機関運転時に動作される可動部材を備えるとともに同可動部材の動作を通じて排気温度が変化する内燃機関の排気浄化装置であって、排気浄化性能の回復を図るための再生処理を行う際に内燃機関の排気温度を上昇させる排気昇温制御を実施する内燃機関の排気浄化装置において、
排気昇温制御中に、前記可動部材を利用せずに排気温度の上昇を図る第1制御モードと、同可動部材の動作を通じて排気温度の上昇を図る第2制御モードと、を機関運転領域に応じて切り換える切換手段と、
前記可動部材の一時的な固着状態を検出する検出手段と、
前記可動部材の一時的な固着状態が検出されたとき、全機関運転領域のうち、前記第1制御モードの実施される領域を前記第2制御モードの実施される領域側に拡大するとともに、それによって前記第2制御モードの実施される領域を縮小する制御手段と、
を備えることを特徴とする内燃機関の排気浄化装置。 - 前記制御手段は、前記可動部材が一時的な固着状態にあるとき、通常時に前記第2制御モードの実施される領域全体を前記第1制御モードの実施される領域とする
請求項1記載の内燃機関の排気浄化装置。 - 前記制御手段は、前記可動部材の一時的な固着が解消されたとき、前記第1制御モードの実施される領域及び前記第2制御モードの実施される領域を通常の状態に戻す
請求項1又は2記載の内燃機関の排気浄化装置。 - 前記可動部材はEGR弁であり、前記排気昇温制御は内燃機関の排気系に設けられて粒子状物質を捕集するフィルタに堆積した粒子状物質を燃焼させて除去すべく実施されるものであって、
前記排気昇温制御の実行中においては、前記EGR弁の一時的な固着状態でない条件のもと、機関低負荷領域にて前記EGR弁を全閉状態として排気温度の上昇を図る第1制御モードとなり、この第1制御モードの実施される領域よりも機関高負荷側にて前記EGR弁を通常時よりも開き側に動作させて排気温度の上昇を図る第2制御モードとなる
請求項1〜3のいずれか一項に記載の内燃機関の排気浄化装置。 - 前記第1制御モード及び前記第2制御モードでは、吸気絞り弁の開度制御、排気絞り弁の開度制御、燃焼室への主燃料噴射後に行われる燃料噴射であるアフター噴射の実行、及び可変容量ターボチャージャの容量制御のうちの少なくとも一つを通じて排気温度の上昇が図られ、
前記第1制御モードの実施される領域が拡大されたとき、その拡大した部分では、吸気絞り弁の開度制御、排気絞り弁の開度制御、燃焼室への主燃料噴射後に行われる燃料噴射であるアフター噴射の実行、及び可変容量ターボチャージャの容量制御のうち第2制御モードで実施されるものが、同第2制御モードの実施時と比較して排気温度をより上昇させる態様で行われる
請求項4記載の内燃機関の排気浄化装置。
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EP07123051.0A EP1942262B1 (en) | 2006-12-26 | 2007-12-12 | Exhaust gas purification apparatus and method for internal combustion engines |
ES07123051.0T ES2616039T3 (es) | 2006-12-26 | 2007-12-12 | Aparato y método de purificación de gas de escape para motores de combustión interna |
US12/000,638 US7918084B2 (en) | 2006-12-26 | 2007-12-14 | Exhaust gas purification apparatus and method for internal combustion engines |
RU2007147720/06A RU2390642C2 (ru) | 2006-12-26 | 2007-12-24 | Устройство и способ очистки выхлопных газов для двигателей внутреннего сгорания |
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JP2010065626A (ja) * | 2008-09-11 | 2010-03-25 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2010270665A (ja) * | 2009-05-21 | 2010-12-02 | Denso Corp | 排気ガスセンサの活性化制御装置 |
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JP3633401B2 (ja) | 1999-10-26 | 2005-03-30 | トヨタ自動車株式会社 | 内燃機関の排気昇温装置 |
JP4161546B2 (ja) | 2001-06-26 | 2008-10-08 | いすゞ自動車株式会社 | 連続再生型ディーゼルパティキュレートフィルタ装置の再生制御方法 |
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JP2010031704A (ja) * | 2008-07-25 | 2010-02-12 | Toyota Motor Corp | エンジンの制御装置 |
JP2010065626A (ja) * | 2008-09-11 | 2010-03-25 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2010270665A (ja) * | 2009-05-21 | 2010-12-02 | Denso Corp | 排気ガスセンサの活性化制御装置 |
JP2011256842A (ja) * | 2010-06-11 | 2011-12-22 | Isuzu Motors Ltd | 排気管噴射制御装置 |
JP2012122339A (ja) * | 2010-12-06 | 2012-06-28 | Hino Motors Ltd | Egrバルブ作動可否判定方法及び装置 |
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US20080148720A1 (en) | 2008-06-26 |
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RU2007147720A (ru) | 2009-06-27 |
JP4232823B2 (ja) | 2009-03-04 |
US7918084B2 (en) | 2011-04-05 |
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EP1942262A2 (en) | 2008-07-09 |
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