发明名称 |
Diagnostic apparatus for an exhaust gas sensor |
摘要 |
A deterioration failure diagnostic apparatus is provided for diagnosing an exhaust gas sensor disposed in an exhaust passage of an engine. The apparatus has a unit for generating a detecting signal and multiplying the generated signal to a first basic fuel injection amount to produce a second fuel injection amount. The apparatus includes a unit for calculating a feedback representative value based on feedback correction coefficients and multiplying the feedback representative value to the second fuel injection amount to produce a final fuel injection amount to be input to the engine. The apparatus includes a unit for extracting a frequency response corresponding to the detecting signal from an output of the exhaust gas sensor of the engine, the output being responsive to the calculated final fuel injection amount. A condition of the exhaust gas sensor is determined based on the extracted frequency response.
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申请公布号 |
US2005061067(A1) |
申请公布日期 |
2005.03.24 |
申请号 |
US20040925150 |
申请日期 |
2004.08.25 |
申请人 |
MAKI HIDETAKA;KITAGAWA HIROSHI;TSUDA MASAKI |
发明人 |
MAKI HIDETAKA;KITAGAWA HIROSHI;TSUDA MASAKI |
分类号 |
F02D45/00;F01N3/00;F01N3/20;F02D41/14;(IPC1-7):G01M19/00 |
主分类号 |
F02D45/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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