发明名称 |
Apparatus for detecting failure of exhaust gas sensor utilizing element temperature |
摘要 |
An apparatus for detecting a failure of an exhaust gas sensor disposed in an exhaust manifold is provided. The apparatus comprises a control unit. The control unit compares detection values of the exhaust gas sensor detected under different element temperatures of the exhaust gas sensor. The control unit detects a failure of the exhaust gas sensor based on the comparison result. In one embodiment, the different states include a state in which the element temperature is maintained at higher level and a state in which the element temperature is maintained at lower level. The element temperature can be controlled by a response assignment control scheme. In one embodiment, the detection values are subjected to a filtering process and/or a statistical process using a successive least squares method. The control unit compares the statistically processed detection values to detect a failure of the exhaust gas sensor.
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申请公布号 |
US2004000493(A1) |
申请公布日期 |
2004.01.01 |
申请号 |
US20030437458 |
申请日期 |
2003.05.14 |
申请人 |
YASUI YUJI;KITAGAWA HIROSHI |
发明人 |
YASUI YUJI;KITAGAWA HIROSHI |
分类号 |
G01N27/409;F01N3/28;F02D41/14;F02D41/22;F02D45/00;G01N27/26;(IPC1-7):G01N27/26 |
主分类号 |
G01N27/409 |
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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