发明名称 |
EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE |
摘要 |
<p>A NOx storing and reducing catalyst is disposed in an engine exhaust gas passage in which the catalyst stores NOx contained in the inflow exhaust gas when an air-fuel ratio of inflow exhaust gas is lean and releases and reduces the stored NOx when the air-fuel ratio of the inflow exhaust gas is rich. A stored NOx amount of the NOx storing and reducing catalyst is calculated and an exhaust gas purification operation is controlled based on the stored NOx amount. When the air-fuel ratio of inflow exhaust gas is lean, a ratio of NOx components in the inflow exhaust gas is calculated. An increment of the stored NOx amount per unit time is calculated based on the ratio of NOx components.</p> |
申请公布号 |
EP2474717(A4) |
申请公布日期 |
2012.11.28 |
申请号 |
EP20090810810 |
申请日期 |
2009.09.01 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
BISAIJI, YUKI |
分类号 |
F01N3/20;B01D53/94;F01N3/08;F01N3/10;F01N3/28;F01N13/02;F02D41/02;F02D41/14 |
主分类号 |
F01N3/20 |
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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