JP2001502395A - NOx排気ガス浄化方法 - Google Patents
NOx排気ガス浄化方法Info
- Publication number
- JP2001502395A JP2001502395A JP10515280A JP51528098A JP2001502395A JP 2001502395 A JP2001502395 A JP 2001502395A JP 10515280 A JP10515280 A JP 10515280A JP 51528098 A JP51528098 A JP 51528098A JP 2001502395 A JP2001502395 A JP 2001502395A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- internal combustion
- combustion engine
- reservoir
- storage
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000746 purification Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 92
- 239000007789 gas Substances 0.000 claims abstract description 281
- 238000002485 combustion reaction Methods 0.000 claims abstract description 227
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000001301 oxygen Substances 0.000 claims abstract description 106
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 106
- 239000003054 catalyst Substances 0.000 claims abstract description 90
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 35
- 239000000446 fuel Substances 0.000 claims description 35
- 239000010970 precious metal Substances 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000007254 oxidation reaction Methods 0.000 claims description 18
- 230000003647 oxidation Effects 0.000 claims description 14
- 238000011282 treatment Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims description 7
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 45
- 238000006243 chemical reaction Methods 0.000 abstract description 29
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 13
- 239000011232 storage material Substances 0.000 abstract description 11
- 238000011069 regeneration method Methods 0.000 description 58
- 230000008929 regeneration Effects 0.000 description 56
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 44
- 239000006096 absorbing agent Substances 0.000 description 26
- 229910052751 metal Inorganic materials 0.000 description 23
- 239000002184 metal Substances 0.000 description 23
- 229910052697 platinum Inorganic materials 0.000 description 21
- 238000010521 absorption reaction Methods 0.000 description 18
- 238000011068 loading method Methods 0.000 description 16
- 230000003197 catalytic effect Effects 0.000 description 12
- 239000000523 sample Substances 0.000 description 12
- 239000011888 foil Substances 0.000 description 11
- 229910052684 Cerium Inorganic materials 0.000 description 10
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000007423 decrease Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical group [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 231100001143 noxa Toxicity 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- UNPLRYRWJLTVAE-UHFFFAOYSA-N Cloperastine hydrochloride Chemical compound Cl.C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)OCCN1CCCCC1 UNPLRYRWJLTVAE-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 6
- 229910052703 rhodium Inorganic materials 0.000 description 6
- 239000010948 rhodium Substances 0.000 description 6
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 6
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 6
- 229910052815 sulfur oxide Inorganic materials 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- 238000012937 correction Methods 0.000 description 5
- RZCJYMOBWVJQGV-UHFFFAOYSA-N 2-naphthyloxyacetic acid Chemical compound C1=CC=CC2=CC(OCC(=O)O)=CC=C21 RZCJYMOBWVJQGV-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000012041 precatalyst Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- LFLZOWIFJOBEPN-UHFFFAOYSA-N nitrate, nitrate Chemical compound O[N+]([O-])=O.O[N+]([O-])=O LFLZOWIFJOBEPN-UHFFFAOYSA-N 0.000 description 2
- RJIWZDNTCBHXAL-UHFFFAOYSA-N nitroxoline Chemical compound C1=CN=C2C(O)=CC=C([N+]([O-])=O)C2=C1 RJIWZDNTCBHXAL-UHFFFAOYSA-N 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- 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
- F01N3/0828—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
- F01N3/0864—Oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
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- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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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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- F01N3/08—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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- 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
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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
- F01N3/10—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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/908—O2-storage component incorporated in the catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2255/00—Catalysts
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- B01D2255/91—NOx-storage component incorporated in the catalyst
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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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- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
- F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
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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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
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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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
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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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
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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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/16—Oxygen
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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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
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
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Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 内燃機関の排気ガスをNOX貯蔵器に導入し、このNOX貯蔵器が第一動作条 件で導入された排気ガスからNOXを蓄え、この排気ガスから第二動作条件 の下で蓄えたNOXを還元するため再び放出する内燃機関の排気ガス浄化方 法において、排気ガスがNOX貯蔵器で少量の貴金属または全くない貴金属 に、次いでNOx貯蔵器および/または後置されている触媒のところでより 多くの貴金属に接触することを特徴とするの方法。 2. 排気ガスはNOX貯蔵器のところで酸素貯蔵器の低容量または容量なしで、 次いでNOX貯蔵器のところおよび/または後置して酸素貯蔵器の高容量で 接触することを特徴とする請求項1に記載の方法。 3. 内燃機関の排気ガスをNOX貯蔵器に導入し、このNOX貯蔵器が第一動作条 件で導入された排気ガスからNOXを蓄え、この排気ガスから第二動作条件 の下で蓄えたNOXを還元するため再び放出する内燃機関の排気ガス浄化方 法において、排気ガスがNOX貯蔵器のところで低容量あるいは無容量の酸 素貯蔵器に、次いでNOX貯蔵器および/または後置されている触媒のとこ ろでより大きい容量の酸素貯蔵器に接触することを特徴とするの方法。 4. 排気ガスは少なくとも3つの異なる処理区域を経由して案内され、そのうち の最初に流入する第一区域はNOX貯蔵器と少量または全くない貴金属と有 し、次に流入する第二区域はNOX貯蔵器と第一区域より多量の貴金属とを 有し、更に後に流入する第三区域は酸素貯蔵器と貴金属コートとを有するこ とを特徴とする請求項1〜3の何れか1項に記載の方法。 5. 第二区域の代わりあるいは第二区域の後と第三区域の前で排気ガスは2A区 域に流入し、この2A区域はNOX貯蔵容量がないかまたは少なく、第一区 域より貴金属が多量にあり、第三区域より酸素貯蔵容量が少ないことを特徴 とする請求項4に記載の方法。 6. 区域で区切られた種々の排気ガス処理の多くは一つの担体で行われることを 特徴とする請求項1〜5の何れか1項に記載の方法。 7. 第二動作条件は内燃機関の低出力時、および/または走行期間、および/ま たはアイドリング期間で狙い通りに設定されることを特徴とする請求項1〜 6の何れか1項に記載の方法。 8. 第一動作条件の平均時間間隔は第二動作条件の平均時間間隔の数倍であるこ とを特徴とする請求項1〜7の何れか1項に記載の方法。 9. 第二動作条件はNOX貯蔵器の吸蔵制御で進行することを特徴とする請求項 1〜8の何れか1項に記載の方法。 10.第二動作条件はNOX貯蔵器の最小の吸蔵時にのみ設定されることを特徴と する請求項1〜9の何れか1項に記載の方法。 11.排気ガス再循環部を経由して排気ガスの一部の流れが、第一動作条件の下で 排気ガス流対吸気の一定比を形成して内燃機関の吸気部に導入され、排気ガ ス流対吸気の比は第二動作条件の下で大きくされることを特徴とする請求項 1〜10の何れか1項に記載の方法。 12.排気ガス流対吸気の比を大きくすることは内燃機関の低出力領域でのみ行わ れることを特徴とする請求項11に記載の方法。 13.第二動作条件の下では燃焼空気を内燃機関に導入することを低減することを 特徴とする請求項1〜12の何れか1項に記載の方法。 14.内燃機関は燃料直噴部を保有することを特徴とする請求項1〜13の何れか 1項に記載の方法。 15.内燃機関はディーゼル内燃機関であることを特徴とする請求項1〜14の何 れか1項に記載の方法。 16.排気ガスは第一動作条件下で貴金属の乏しいかまたは貴金属を含まないNO X貯蔵の領域に導入される前に変換器に導かれ、この変換器の中で排気ガス 中のNO2/NOの比が大きくされる、および/またはこの変換器の中で温度 ≧230℃の時、排気ガス内に含まれ排気ガスと共に変換器に導入されるNO をNO2に変換することを特徴とする請求項1〜15の何れか1項に記載の 方法。 17.吸蔵されたNOXの還元はλ≦1.05の時に行われることを特徴とする請求項 1〜16の何れか1項に記載の方法。 18.NOX貯蔵器は酸化アルミウム、特にγ酸化アルミウムを含むことを特徴と する請求項1〜17の何れか1項に記載の方法。 19.NOX貯蔵器はアルカリ金属、アルカリ土類金属、希土類、ランタン、チタ ン、銅および/または満貫のグループのうちの一つの元素を含むことを特徴 とする請求項1〜18の何れか1項に記載の方法。 20.NOX貯蔵器は酸素が過剰な時に排気ガスからNOXとSOXを吸収すること を特徴とする請求項1〜19の何れか1項に記載の方法。 21.NOX貯蔵器は還元雰囲気内でおよび/または酸素濃度が低い時にNOXおよ び/またはSOXを放出することを特徴とする請求項1〜20の何れか1項 に記載の方法。 22.酸素濃度および/または酸素濃度を含む量を測定する酸素濃度測定装置が設 けてあり、この酸素濃度測定装置は第一または第二動作条件を設定する制御 部に酸素濃度および/または酸素濃度を含む量を入力値として出力すること を特徴とする請求項20および/または21に記載の方法。 23.NOX貯蔵器は高温でNOXおよび/またはSOXを放出することを特徴とす る請求項1〜22の何れか1項に記載の方法。 24.温度測定装置が設けてあり、この温度測定装置はガス流および/またはNO X貯蔵器の温度あるいは温度を含む量を求め、第一または第二動作条件を設 定する制御部にこの温度あるいは温度を含む量を入力量として出力すること を特徴とする請求項23に記載の方法。 25.制御部は酸素濃度および温度あるいは温度を含む量を入力量として保有する ことを特徴とする請求項22または24に記載の方法。 26.第一動作条件の下で内燃機関の導入された排気ガスからNOXを蓄え、第二 条件の下で蓄えたNOXを還元するために再びNOXを放出するのに適したN OX貯蔵器を有する排気ガス装置を備えた内燃機関において、NOX貯蔵器が 貴金属を少量を含むあるいは全く含まない少なくとも一つの領域を有し、こ の領域の下流にNOX貯蔵器のところあるいは後置配置されて多量の貴金属 があることを特徴とする内燃機関。 27.NOX貯蔵器は少なくとも一つの領域にわたり酸素貯蔵容量が少ないか、ま たは全くなく、この領域の下流にNOX貯蔵器のところあるいは後置されて 酸化触媒と協働する酸素貯蔵器があることを特徴とする請求項26の内燃機 関。 28.第一動作条件の下で内燃機関の導入された排気ガスからNOXを蓄え、第二 条件の下で蓄えたNOXを還元するために再びNOXを放出するのに適したN OX貯蔵器を有する排気ガス装置を備えた内燃機関において、NOX貯蔵器が 少なくとも一つの領域にわたり酸素貯蔵容量が少ないか、あるいは全くなく 、この領域の下流にNOX貯蔵器のところあるいは後置配置されて酸化触媒 と協働する酸素貯蔵器があることを特徴とする内燃機関。 29.少なくとも3つの排気ガス処理区域があり、このうちの最初に流入する第一 区域はNOX貯蔵器と少量または全くない貴金属を有する、次に流入する第 二区域はNOX貯蔵器と第一区域より多量の貴金属とを有し、その後で流入 する第三区域は酸素貯蔵器と貴金属コートを有することを特徴とする請求項 26〜28の何れか1項に記載の内燃機関。 30.第二区域の代わりあるいは第二区域の後と第三区域の前に2A区域を設け、 この2A区域はNOX貯蔵容量がないか、あるいは僅かしかなく、酸素貯蔵 容量がないか、あるいは僅かしかなく、第一区域より多く貴金属が被覆され ていることを特徴とする請求項29に記載の内燃機関。 31.担体上には異なる多数の排気ガス処理部分が配置されていることを特徴とす る請求項26〜30の何れか1項に記載の内燃機関。 32.内燃機関の吸気部の前、特に排気ガス再復帰部の流入口の上流にスロットル 弁を設け、このスロットル弁により内燃機関の吸気部に流入する空気量を可 変できることを特徴とする請求項26〜31の何れか1項に記載の内燃機関 。 33.内燃機関は直噴装置であることを特徴とする請求項26〜32の何れか1項 に記載の内燃機関。 35.内燃機関はディーゼル内燃機関であることを特徴とする請求項26〜34の 何れか1項に記載の内燃機関。
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DE19640161.5 | 1996-09-28 | ||
DE19640161A DE19640161A1 (de) | 1996-09-28 | 1996-09-28 | NOx-Abgasreinigungsverfahren |
PCT/EP1997/005268 WO1998013128A1 (de) | 1996-09-28 | 1997-09-25 | NOx-ABGASREINIGUNGSVERFAHREN |
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EP (1) | EP0930930B1 (ja) |
JP (1) | JP4180660B2 (ja) |
KR (1) | KR100501057B1 (ja) |
DE (2) | DE19640161A1 (ja) |
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- 1997-09-25 DE DE59707300T patent/DE59707300D1/de not_active Expired - Lifetime
- 1997-09-25 KR KR10-1999-7001500A patent/KR100501057B1/ko not_active IP Right Cessation
- 1997-09-25 EP EP97910360A patent/EP0930930B1/de not_active Expired - Lifetime
- 1997-09-25 WO PCT/EP1997/005268 patent/WO1998013128A1/de active IP Right Grant
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JP2004513280A (ja) * | 2000-10-31 | 2004-04-30 | エミテク・ゲゼルシャフト・フュール・エミシオーンテクノロギー・ミット・ベシュレンクテル・ハフツング | 小体積Nox吸着体 |
JP2009508049A (ja) * | 2005-09-17 | 2009-02-26 | ダイムラー・アクチェンゲゼルシャフト | 内燃機関の排気ガスを浄化するための排気ガス浄化コンポーネント |
JP2008190359A (ja) * | 2007-02-01 | 2008-08-21 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
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Publication number | Publication date |
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DE59707300D1 (de) | 2002-06-20 |
JP4180660B2 (ja) | 2008-11-12 |
KR20000035827A (ko) | 2000-06-26 |
KR100501057B1 (ko) | 2005-07-18 |
WO1998013128A1 (de) | 1998-04-02 |
DE19640161A1 (de) | 1998-04-02 |
EP0930930A1 (de) | 1999-07-28 |
US5992142A (en) | 1999-11-30 |
EP0930930B1 (de) | 2002-05-15 |
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