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1. (WO2019025870) DEF INJECTION STRATEGY FOR MULTIPLE INJECTION SYSTEMS
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Pub. No.: WO/2019/025870 International Application No.: PCT/IB2018/001035
Publication Date: 07.02.2019 International Filing Date: 01.08.2018
IPC:
F01N 3/20 (2006.01) ,F01N 3/28 (2006.01) ,F01N 9/00 (2006.01) ,F01N 13/00 (2010.01)
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
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
28
Construction of catalytic reactors
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
9
Electrical control of exhaust gas treating 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
13
Exhaust or silencing apparatus characterised by constructional features
Applicants:
ROBERT BOSCH GMBH [DE/DE]; Postfach 30 02 20 70442 Stuttgart, DE
Inventors:
EL-GAMMAL, Mohamed; CA
CASARELLA, Mark, V.; US
Priority Data:
62/540,21202.08.2017US
Title (EN) DEF INJECTION STRATEGY FOR MULTIPLE INJECTION SYSTEMS
(FR) STRATÉGIE D'INJECTION DE FED POUR MULTIPLES SYSTÈMES D'INJECTION
Abstract:
(EN) A diesel exhaust system includes multiple injectors for providing diesel exhaust fluid to an exhaust to reduce NOx emissions. Two or more injectors provide DEF to the exhaust system of an engine. In one mode, the injectors alternately inject DEF fluid. In one embodiment, the system includes a NOx sensor or a NOx model to assist in determining an amount of DEF that must be provided. In a high DEF output operating mode, the DEF amount for one injector is output at a higher rate than the other injector such that deposits may form. After the injector at the higher rate of injection operates for a selected fraction of time, the other injector provides DEF fluid at the higher rate. Further, the system calculates an estimated developed liquid film mass for each injector output. When the estimated developed liquid film mass is not less than a parameter limit film mass, the system performs ATS regeneration.
(FR) La présente invention concerne un système d'échappement diesel comprenant de multiples injecteurs pour fournir un fluide d'échappement diesel à un échappement pour réduire les émissions de NOx. Au moins deux injecteurs fournissent du FED au système d'échappement d'un moteur. Dans un mode, les injecteurs injectent en alternance un fluide FED. Dans un mode de réalisation, le système comprend un capteur de NOx ou un modèle de NOx pour aider à déterminer une quantité de FED qui doit être fournie. Dans un mode de fonctionnement de sortie de FED élevée, la quantité de FED pour un injecteur est délivrée à une vitesse supérieure à celle de l'autre injecteur de telle sorte que des dépôts peuvent se former. Après que l'injecteur à la vitesse d'injection supérieure fonctionne pendant une fraction de temps sélectionnée, l'autre injecteur fournit un fluide FED à la vitesse supérieure. En outre, le système calcule une masse de film liquide développée estimée pour chaque sortie d'injecteur. Lorsque la masse de film liquide développée estimée n'est pas inférieure à une masse de film limite de paramètre, le système effectue une régénération ATS.
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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: English (EN)
Filing Language: English (EN)