EHC line leakage diagnosis method and vehicle exhaust system thereof

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11746687
APP PUB NO 20230203978A1
SERIAL NO

17847669

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Abstract

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An EHC line leakage diagnosis method can operate a heater of an oxygen detector when satisfying one or more conditions of an engine off time, a coolant temperature, and an outside air temperature by a diagnosis controller upon the key-on of the non-operation of an engine, and then, determine the normality or abnormality of a temperature drop using a change in a temperature value of a signal value and the temperature value detected by the oxygen detector after an air pump is driven, and then confirm the leakage of an exhaust line and a line on the rear end portion of an EHC valve of an air line using the number of times of the occurrence of the abnormality of the temperature drop, and can perform the failure diagnosis without generating the exhaust gas by not operating an engine.

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Patent Owner(s)

Patent OwnerAddress
HYUNDAI MOTOR COMPANYSEOUL 06797
KIA CORPORATION12 HEOLLEUNG-RO SEOCHO-GU SEOUL 06797

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koo, Bon-Chang Seongnam-si, KR 15 9

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