发明名称 |
Exhaust gas purifying apparatus and controller for internal combustion engine |
摘要 |
When deterioration of a NOx purifying device due to sulfur contamination is detected, a specific operating state flag FHL is set to "1," and, at intervals equal to or shorter than, for example, three seconds, the air-fuel ratio of an air-fuel mixture to be supplied to an engine is varied so that it is alternately leaner and richer than the stoichiometric air-fuel ratio. When the temperature TCAT of the NOx purifying device exceeds a deterioration recovery temperature STCAT2 while the air-fuel ratio variation control is being executed, the SOx removing flag FHLSOx is set to "1," and for a period equivalent to the deterioration recovery time TRSOx, the air-fuel ratio is maintained richer than the stoichiometric air-fuel ratio. <IMAGE> |
申请公布号 |
EP1059428(B1) |
申请公布日期 |
2005.12.14 |
申请号 |
EP20000109049 |
申请日期 |
2000.04.28 |
申请人 |
HONDA GIKEN KOGYO KABUSHIKI KAISHA |
发明人 |
SUGIURA, KENJI;OONO, HIROSHI;SAKANUSHI, MASAHIRO;YAGISAWA, KEIICHI |
分类号 |
F01N3/08;F02D21/08;F02D41/02 |
主分类号 |
F01N3/08 |
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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