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1. (WO2013146462) EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2013/146462 International Application No.: PCT/JP2013/057800
Publication Date: 03.10.2013 International Filing Date: 19.03.2013
IPC:
F01N 3/24 (2006.01) ,F01N 3/08 (2006.01) ,F01N 3/20 (2006.01) ,F02D 45/00 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08
for rendering innocuous
10
by thermal or catalytic conversion of noxious components of exhaust
24
characterised by constructional aspects of converting apparatus
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08
for rendering innocuous
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
08
for rendering innocuous
10
by thermal or catalytic conversion of noxious components of exhaust
18
characterised by methods of operation; Regulation
20
specially adapted for catalytic conversion
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
45
Electrical control not provided for in groups F02D41/-F02D43/98
Applicants: ISUZU MOTORS LIMITED[JP/JP]; 26-1, Minami-Ohi 6-chome, Shinagawa-ku, Tokyo 1408722, JP
Inventors: NAGAOKA Daiji; JP
NAKADA Teruo; JP
Agent: KINUTANI Nobuo; Chemical Building, 15-12, Nishi-Shimbashi 3-chome, Minato-ku, Tokyo 1050003, JP
Priority Data:
2012-07143927.03.2012JP
Title (EN) EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE
(FR) SYSTÈME DE PURIFICATION DE GAZ D'ÉCHAPPEMENT D'UN MOTEUR À COMBUSTION INTERNE
(JA) 内燃機関の排気ガス浄化装置
Abstract:
(EN) An exhaust gas purification system, in which a NOx purification catalyst is capable of functioning across the entire operating range of an internal combustion engine, is provided. The exhaust gas purification system (1) of the internal combustion engine (10) is provided with: an upstream NOx purification catalyst (25) that is positioned on an exhaust passage (14) of the internal combustion engine (10), and purifies NOx in exhaust gas; a downstream NOx purification catalyst (26) that is positioned on the exhaust passage further downstream than the upstream NOx purification catalyst (25), and has a higher NOx purification rate than the downstream NOx purification catalyst (25) in a high-temperature region; an exhaust gas cooling device (40) that is disposed on the exhaust passage (14) between the upstream NOx purification catalyst (25) and the downstream NOx purification catalyst (26), and cools exhaust gas; an exhaust temperature detection means (34) that detects the temperature of exhaust gas that flows into the downstream NOx purification catalyst (26); and a control means (35) that activates the exhaust gas cooling device (40) when the value detected by the exhaust temperature detection means (34) exceeds a threshold value.
(FR) L'invention concerne un système de purification de gaz d'échappement, dans lequel un catalyseur de purification de NOx est apte à fonctionner à travers la plage de fonctionnement entière d'un moteur à combustion interne. Le système de purification de gaz d'échappement (1) du moteur à combustion interne (10) comprend : un catalyseur de purification de NOx amont (25) qui est positionné sur un passage d'échappement (14) du moteur à combustion interne (10), et purifie les NOx dans le gaz d'échappement ; un catalyseur de purification de NOx aval (26) qui est positionné sur le passage d'échappement plus en aval que le catalyseur de purification de NOx amont (25) et a un taux de purification de NOx plus élevé que le catalyseur de purification de NOx amont (25) dans une région à température élevée ; un dispositif de refroidissement de gaz d'échappement (40) qui est disposé sur le passage d'échappement (14) entre le catalyseur de purification de NOx amont (25) et le catalyseur de purification de NOx aval (26), et refroidit le gaz d'échappement ; un moyen de détection de température d'échappement (34) qui détecte la température du gaz d'échappement qui s'écoule dans le catalyseur de purification de NOx aval (26) ; et un moyen de contrôle (35) qui active le dispositif de refroidissement de gaz d'échappement (40) lorsque la valeur détectée par le moyen de détection de température d'échappement (34) dépasse une valeur seuil.
(JA) 内燃機関の全運転領域でNOx浄化触媒を機能させることが可能となる排気ガス浄化装置を提供する。内燃機関(10)の排気ガス浄化装置(1)は、内燃機関(10)の排気通路(14)に配設され、排気ガス中のNOxを浄化する前段NOx浄化触媒(25)と、前段NOx浄化触媒(25)よりも下流側の排気通路(14)に配設され、高温領域において前段NOx浄化触媒(25)よりも高いNOx浄化率特性を有する後段NOx浄化触媒(26)と、前段NOx浄化触媒(25)と後段NOx浄化触媒(26)との間の排気通路(14)に設けられ、排気ガスを冷却する排気ガス冷却装置(40)と、後段NOx浄化触媒(26)に流入する排気ガスの温度を検出する排気温度検出手段(34)と、排気温度検出手段(34)の検出値が閾値を超えた場合に、排気ガス冷却装置(40)を作動させる制御手段(35)とを備える。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)