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1. (WO2018127638) METHOD FOR CLEANING AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE
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Pub. No.: WO/2018/127638 International Application No.: PCT/FR2017/053603
Publication Date: 12.07.2018 International Filing Date: 15.12.2017
IPC:
F02D 41/02 (2006.01) ,F01N 3/20 (2006.01) ,F02D 41/14 (2006.01) ,F01N 11/00 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
02
Circuit arrangements for generating control signals
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
41
Electrical control of supply of combustible mixture or its constituents
02
Circuit arrangements for generating control signals
14
Introducing closed-loop corrections
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:
PSA AUTOMOBILES SA [FR/FR]; 2-10 Boulevard de l'Europe 78300 Poissy, FR
Inventors:
LAIGLE, Emmanuel; FR
DUMONT, Jerome; FR
DJELLAL, Mahe; FR
Agent:
FERNANDEZ, Francis; FR
Priority Data:
175008505.01.2017FR
Title (EN) METHOD FOR CLEANING AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE
(FR) PROCEDE DE DECRASSAGE D'UNE LIGNE D'ECHAPPEMENT D'UN MOTEUR A COMBUSTION INTERNE
Abstract:
(EN) The invention relates to a method for cleaning a solid urea deposit from an exhaust system (1) of an internal combustion engine (2), said exhaust system (1) being provided with a particulate filter (52) and a selective catalytic reduction system (5) comprising an injector (6) for injecting a urea-based decontamination liquid. In order to remove the solid urea deposit, the method comprises a step of activating a phase in which the exhaust system (1) is cleaned by increasing the temperature in the system (1) caused by a phase comprising the partial regeneration of the particulate filter, said cleaning phase being activated before the soot mass in the filter (52) has reached a threshold for the activation of the regeneration of the filter (52).
(FR) L'invention concerne un procédé de décrassage d'un dépôt d'urée solide d'une ligne d'échappement (1) d'un moteur à combustion interne (2) étant pourvue d'un filtre à particules (52) et d'un système de réduction catalytique sélective (5) comportant un injecteur (6) pour injecter un liquide de dépollution à base d'urée. Pour éliminer le dépôt d'urée solide, ledit procédé comporte une étape de déclenchement d'une phase de décrassage par augmentation d'une température dans ladite ligne d'échappement (1) provoquée par une phase de régénération partielle du filtre à particules, la phase de décrassage étant déclenchée avant que la masse de suies dans ledit filtre (52) ait atteint un seuil de déclenchement d'une régénération dudit filtre (52).
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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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, 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)