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1. (WO2017060578) METHOD FOR DIAGNOSING A CATALYST FOR SELECTIVE REDUCTION OF NITROGEN OXIDES
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Pub. No.: WO/2017/060578 International Application No.: PCT/FR2016/052295
Publication Date: 13.04.2017 International Filing Date: 13.09.2016
IPC:
F01N 3/20 (2006.01) ,F01N 11/00 (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
18
characterised by methods of operation; Regulation
20
specially adapted for catalytic conversion
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
11
Monitoring or diagnostic devices for exhaust-gas treatment apparatus
Applicants: RENAULT S.A.S.[FR/FR]; 13-15 quai Alphonse Le Gallo 92100 Boulogne Billancourt, FR
Inventors: SELLAMI, Ali; FR
TRAD, Houcem; FR
Priority Data:
155957408.10.2015FR
Title (EN) METHOD FOR DIAGNOSING A CATALYST FOR SELECTIVE REDUCTION OF NITROGEN OXIDES
(FR) PROCEDE DE DIAGNOSTIC D'UN CATALYSEUR DE REDUCTION SELECTIVE DES OXYDES D'AZOTE
Abstract:
(EN) The invention relates to a method for diagnosing a SCR catalyst, comprising at least the steps of: determining (120) the effectiveness (ε) of the catalyst; comparing (130) said effectiveness (ε) with a first threshold (ε1); and deeming (140) the catalyst to be faulty when the effectiveness (ε) is lower than the first threshold (ε1), said method being characterised in that it includes at least the following steps: comparing (150) the effectiveness (ε) with a second threshold (ε2) which is higher than the first threshold (ε1); when the effectiveness (ε) is higher than the second threshold (ε2), deeming (160) the catalyst to be not faulty; when the effectiveness (ε) is between the first (ε1) and the second threshold (ε2), deeming the state of faultiness of the catalyst to be undetermined, and then intrusively determining (170) the ammonia storage capacity in order to eliminate the indeterminacy.
(FR) L'invention concerne un procédé de diagnostic d'un catalyseur SCR comportant au moins des étapes dans lesquelles : - on détermine (120)de l'efficacité (ε)du catalyseur, - on compare (130) cette efficacité (ε) avec un premier seuil (ε1), - on juge (140) le catalyseur défaillant lorsque l'efficacité (ε) est inférieure au premier seuil (ε1), Ledit procédé étant caractérisé en ce qu'il comprend au moins les étapes suivantes: -on compare (150) l'efficacité (ε) avec un second seuil (ε2) supérieur au premier (ε1), -lorsque l'efficacité (ε) est supérieure au second seuil (ε2) on juge (160) le catalyseur non défaillant, -lorsque l'efficacité (ε) est comprise entre le premier (ε1) et le second seuil (ε2), on juge l'état de défaillance du catalyseur indéterminé et on détermine (170) alors de manière intrusive la capacité de stockage d'ammoniac pour lever l'indétermination.
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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, IR, IS, JP, KE, KG, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, 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, SA, 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, ST, 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, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)