发明名称 |
Air-fuel ratio controller for internal combustion engines |
摘要 |
A target air-fuel ratio KCMD for an exhaust gas upstream of a catalytic converter is sequentially determined to converge the output VO2/OUT of an O2 sensor downstream of the catalytic converter to a target value VO2/TARGET, and the amount of fuel supplied to an internal combustion engine is controlled to converge the output KACT of an air-fuel ratio sensor to the target air-fuel ratio KCMD. While the amount of fuel supplied to the internal combustion engine is being thus controlled, the value of a deterioration linear function sigma whose variable components are represented by time-series data of the output VO2/OUT of the O2 sensor is determined. A central value of the square sigma2 of the value of the deterioration linear function sigma is determined as a deterioration evaluating parameter. A deteriorated state of the catalytic converter is evaluated on the basis of the value of the deterioration evaluating parameter.
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申请公布号 |
US2003093989(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
US20020168685 |
申请日期 |
2002.10.28 |
申请人 |
UENO MASAKI;AKAZAKI SHUSUKE;IWAKI YOSHIHISA;KITAGAWA HIROSHI |
发明人 |
UENO MASAKI;AKAZAKI SHUSUKE;IWAKI YOSHIHISA;KITAGAWA HIROSHI |
分类号 |
F02D45/00;B01D53/86;F01N3/20;F01N3/24;F01N11/00;F02D41/02;F02D41/14;(IPC1-7):F01N3/00;F01N7/00 |
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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