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1. (WO2017129420) SCR DOSING SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/129420 International Application No.: PCT/EP2017/050650
Publication Date: 03.08.2017 International Filing Date: 13.01.2017
IPC:
F01N 3/20 (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
Applicants:
DELPHI TECHNOLOGIES IP LIMITED [BB/BB]; Erin Court, Bishop's Court Hill St. Michael, BB
Inventors:
SYKES, Martin, A,P.; GB
PANTENY, Simon, R.; GB
TUROBIN-HARRINGTON, Philip; GB
Agent:
DELPHI FRANCE SAS; c/o Delphi Technologies Campus Saint Christophe, Bâtiment Galilée 2 10, avenue de l'Entreprise 95863 Cergy Pontoise CEDEX, FR
Priority Data:
1601542.228.01.2016GB
Title (EN) SCR DOSING SYSTEM
(FR) SYSTÈME DE DOSAGE RCS
Abstract:
(EN) The invention comprises a method for purging a selective catalytic reduction dosing system (10) having a urea reservoir (11), a urea delivery module (12) comprising at least one pump (23, 24, 33, 43), a dosing injector (15) arranged to spray urea into an engine exhaust pipe and a feedline (26, 36, 46). The method comprises: (1) activating a reverse pump (23)/ a pump in a reverse direction (33, 43); (2) opening the dosing injector (15); (3) stopping the reverse pump (23)/ reverse direction of the pump (33, 43) and closing the dosing injector (15); (4) activating a forward pump (24)/ a forward direction of the pump (33, 43); (5) stopping the forward pump (24)/ forward direction of the pump (33, 43) and opening the dosing injector (15); and (6) activating the reverse pump (23)/ reverse direction of the pump (33, 43). The invention also extends to a selective catalytic reduction dosing system (10).
(FR) L'invention concerne un procédé de purge d'un système de dosage à réduction catalytique sélective (RCS) (10) comprenant un réservoir d'urée (11), un module de fourniture d'urée (12) comprenant au moins une pompe (23, 24, 33, 43), un injecteur de dosage (15) conçu pour pulvériser de l'urée dans un tuyau d'échappement de moteur et une ligne d'alimentation (26, 36, 46). Le procédé consiste : (1) à activer une pompe inverse (23)/le fonctionnement en sens inverse de la pompe (33, 43); (2) à ouvrir l'injecteur de dosage (15); (3) à arrêter la pompe inverse (23)/le fonctionnement en sens inverse de la pompe (33, 43) et fermer l'injecteur de dosage (15); (4) à activer une pompe directe (24)/le fonctionnement en sens direct de la pompe (33, 43); (5) à arrêter la pompe directe (24)/le fonctionnement en sens direct de la pompe (33, 43) et à ouvrir l'injecteur de dosage (15); et (6) à activer la pompe inverse (23)/le fonctionnement en sens inverse de la pompe (33, 43). L'invention concerne également un système de dosage à réduction catalytique sélective (10).
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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, 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 Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
Also published as:
IN201847027713KR1020180107120CN108699937EP3408510US20190032532