SECONDARY AIR SYSTEM MONITORING METHOD AND APPARATUS, AND DEVICE AND STORAGE MEDIUM

WIPO Patent Application WO/2022/257762

A1

Disclosed in the present application are a secondary air system monitoring method and apparatus, and a device and a storage medium. The method comprises: after a program is initialized, acquiring a first flow difference reference value of a secondary air pump (4) in a closed state and a second flow difference reference value of the secondary air pump (4) in an open state, acquiring a stability auxiliary calculation value of an operating parameter, and acquiring a first auxiliary calculation value of the secondary air pump (4) in the closed state and a second auxiliary calculation value of the secondary air pump (4) in the open state; determining whether the stability auxiliary calculation value meets a preset stability condition, and determining whether the first auxiliary calculation value and the second auxiliary calculation value satisfy a validity condition; and if the stability auxiliary calculation value meets the preset stability condition, and the first auxiliary calculation value and the second auxiliary calculation value satisfy the validity condition, determining, according to the first flow difference reference value and the second flow difference reference value, whether a fault is present in a secondary air system.

SONG TONGHAO (CN)
SHI XIAN (CN)
SUN PENGYUAN (CN)
SUN CHAO (CN)
LIU TINGWEI (CN)
XIN BAIYU (CN)
ZHANG BO (CN)

PCT/CN2022/094843

December 15, 2022

May 25, 2022

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CHINA FAW CO LTD (CN)

F01N3/32; F01N11/00

CN113187592A	2021-07-30
US20040148926A1	2004-08-05
US6023401A	2000-02-08
US20050016265A1	2005-01-27
JP2007321662A	2007-12-13

BEIJING YZH IP FIRM (CN)

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