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Abnormality diagnosing apparatus of exhaust gas sensor
汽车零件
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编号 AM00205104
交易方式 面谈
地区: 中国
领域: 汽车零件
作    者 KADOWAKI HISASHI [JP]; MORINAGA SYUJIRO [JP]; YAMASHITA YUKIHIRO [JP]; MAEJI HIDEYUKI [JP] 日    期
申  请  人 DENSO CORP [JP] 分    类 专利
专利状态 已授予 授权号 US2003154709A1
技术成熟度 详细设计 依存度 独立应用
At a time point at which an ignition switch is made OFF and an engine is stopped, an output of a downstream gas sensor is read, thereafter, at a time point at which a predetermined time period has elapsed from stopping the engine, the output of the downstream gas sensor changed by flowing the atmosphere back into an exhaust pipe is read. Thereafter, a change in the output of the downstream gas sensor until the predetermined time period has elapsed from stopping the engine is calculated, the change in the output is compared with an abnormality determinant and when the change in the output is smaller than the abnormality determinant, response of the downstream gas sensor is determined to be abnormal.
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