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. <IMAGE>
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申请公布号 |
EP1167726(A2) |
申请公布日期 |
2002.01.02 |
申请号 |
EP20010115293 |
申请日期 |
2001.06.25 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KAKO, JUNICHI;FUWA, NAOHIDE;KOJIMA, KAZUNORI;KATAYAMA, AKIHIRO;KATO, NAOTO;NAGAI, TOSHINARI |
分类号 |
F02D45/00;B01D53/86;F01N3/20;F01N3/24;F02D41/02;F02D41/04;F02D41/14;(IPC1-7):F02D41/02 |
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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