发明名称 |
Air-fuel ratio control apparatus of internal combustion engine |
摘要 |
An air-fuel ratio control apparatus of an internal combustion engine according to the present invention is provided with oxygen storage amount estimating means, downstream exhaust air-fuel ratio detecting means, maximum oxygen storage amount estimating means, and air-fuel ratio target setting means. The oxygen storage amount estimating means estimates an oxygen storage amount of an exhaust purifying catalyst, based on a history of an oxygen adsorption/desorption amount of the exhaust purifying catalyst located on an exhaust path. The downstream exhaust air-fuel ratio detecting means is located downstream of the exhaust purifying catalyst and detects an exhaust air-fuel ratio downstream of the exhaust purifying catalyst. The maximum oxygen storage amount estimating means estimates a maximum oxygen storage amount, based on an oxygen storage amount estimate when the exhaust air-fuel ratio detected is a predetermined air-fuel ratio. This permits effective utilization of oxygen occlusion capability of the exhaust purifying catalyst and improvement in exhaust purification performance.
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申请公布号 |
US2002011068(A1) |
申请公布日期 |
2002.01.31 |
申请号 |
US20010880029 |
申请日期 |
2001.06.14 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KAKO JUNICHI;NAGAI TOSHINARI;FUWA NAOHIDE;KOJIMA KAZUNORI;KATAYAMA AKIHIRO;KATO NAOTO |
分类号 |
F02D45/00;B01D53/86;F01N3/20;F01N3/24;F02D41/02;F02D41/04;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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地址 |
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