发明名称 |
Abnormality detection device for air-fuel ratio sensor |
摘要 |
A novel abnormality detection device for an air-fuel ratio sensor able to more accurately detect an abnormality, provided with an air-fuel ratio sensor arranged in an exhaust passage of an internal combustion engine for detecting an air-fuel ratio based on a current generated in accordance with a concentration of oxygen in the exhaust gas along with application of voltage and an air-fuel ratio sensor activating means for activating the air-fuel ratio sensor, wherein the activity of the air-fuel ratio sensor is maintained even after the internal combustion engine is stopped and an abnormality of the air-fuel ratio sensor is detected based on an output of the air-fuel ratio sensor upon and/or after the elapse of a first predetermined time after the internal combustion engine is stopped.
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申请公布号 |
US6957563(B2) |
申请公布日期 |
2005.10.25 |
申请号 |
US20040857957 |
申请日期 |
2004.06.02 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
HATTORI KAZUTAKA |
分类号 |
F01N13/00;F01N99/00;F02D41/04;F02D41/14;F02D41/22;F02D45/00;G01M99/00;G01N7/00;G01N21/00;G01N27/417;(IPC1-7):G01N7/00;G01N33/496 |
主分类号 |
F01N13/00 |
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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