EP 3842624 A1 20210630 - METHOD AND SYSTEM FOR DETERMINING SULFUR POISONING STATE OF SELECTIVELY CATALYTIC REDUCTION DEVICE
Title (en)
METHOD AND SYSTEM FOR DETERMINING SULFUR POISONING STATE OF SELECTIVELY CATALYTIC REDUCTION DEVICE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR BESTIMMUNG DER SCHWEFELVERGIFTUNG EINES SCR KATALYSATORS
Title (fr)
MÉTHODE ET SYSTÈME POUR LA DÉTERMINATION DE L'EMPOISONEMENT AU SOUFRE D'UN CATALYSEUR SCR.
Publication
Application
Priority
CN 201911361702 A 20191226
Abstract (en)
A method and a system for determining a sulfur poisoning state of a SCR device are provided according to the present disclosure. In the method, if a reduction efficiency of the SCR device and a concentration of urea meet a predetermined triggering condition, the ammonia storage capacity detection is performed. In the detection, the urea injection is stopped and the accumulated consumption amount of stored ammonia is calculated. If the accumulated consumption amount of stored ammonia is not greater than a consumption limit value and a first actual reduction efficiency of the SCR device is less than a first predetermined efficiency value, the low-temperature efficiency of the SCR is required to be monitored. In the process of monitoring, if a difference value between a theoretical reduction efficiency of the SCR device and a second actual reduction efficiency is greater than a difference threshold value, it is determined that the SCR is in the sulfur poisoning state.
IPC 8 full level
F01N 3/20 (2006.01); F01N 11/00 (2006.01)
CPC (source: CN EP)
F01N 3/2066 (2013.01 - CN EP); F01N 3/208 (2013.01 - CN); F01N 11/00 (2013.01 - CN EP); F01N 2550/02 (2013.01 - CN EP); F01N 2570/04 (2013.01 - EP); F01N 2610/02 (2013.01 - CN EP); F01N 2900/1612 (2013.01 - EP); F01N 2900/1621 (2013.01 - EP)
Citation (search report)
- [A] WO 2018132059 A1 20180719 - SCANIA CV AB [SE]
- [A] US 2014331644 A1 20141113 - KUMAR SHANKAR [US], et al
- [A] EP 2770178 A1 20140827 - YEZERETS ALEKSEY [US], et al
- [A] US 2017167352 A1 20170615 - HAGIWARA KOJI [JP], et al
- [A] CN 109707494 A 20190503 - WEICHAI POWER CO LTD
- [A] US 9856773 B1 20180102 - PARK JIE WON [KR], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3842624 A1 20210630; EP 3842624 B1 20220713; CN 110761882 A 20200207; CN 110761882 B 20200407
DOCDB simple family (application)
EP 20196612 A 20200917; CN 201911361702 A 20191226