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1. (WO2018218533) DIAGNOSIS METHOD AND DIAGNOSIS DEVICE FOR SRC EXHAUST GAS AFTERTREATMENT SYSTEM

Pub. No.:    WO/2018/218533    International Application No.:    PCT/CN2017/086671
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu Jun 01 01:59:59 CEST 2017
IPC: G05B 23/02
G01M 17/007
G01M 15/10
Applicants: SHENZHEN FCAR TECHNOLOGY CO., LTD
深圳市爱夫卡科技股份有限公司
Inventors: YAO, Yong
姚勇
CHANG, Yanlong
常雁龙
Title: DIAGNOSIS METHOD AND DIAGNOSIS DEVICE FOR SRC EXHAUST GAS AFTERTREATMENT SYSTEM
Abstract:
A diagnostic method and a diagnostic device of an SRC exhaust gas aftertreatment system. The diagnostic method comprises the following steps: receiving a test command; parsing the acquired test command; sending, according to a test item, an excitation signal and a power signal respectively to a signal channel and a power supply channel of the exhaust gas aftertreatment system to be tested, so that the SCR exhaust gas aftertreatment system can respond after having received the excitation signal and the power signal and returns a responsive electrical signal; receiving the electrical signal returned by the SCR exhaust gas aftertreatment system; and analyzing the returned electrical signal by means of the fuzzy algorithm, thereby determining whether the SCR exhaust gas aftertreatment system fails. The diagnosis method for the SRC exhaust gas aftertreatment system can accurately determine a fault of the SCR exhaust gas aftertreatment system and provide a fault solution.