发明名称 |
An exhaust gas purification device for an internal combustion engine |
摘要 |
An NOx occluding and reducing catalyst is disposed in an exhaust gas passage of an internal combustion engine that operates at a lean air-fuel ratio. When the engine is operating at a lean air-fuel ratio, the NOx occluding and reducing catalyst absorbs NOx in the exhaust gas. To release NOx, the engine is operated at a rich air-fuel ratio so that the exhaust gas flowing into the NOx occluding and reducing catalyst acquires a rich air-fuel ratio. <IMAGE>
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申请公布号 |
EP1443196(A1) |
申请公布日期 |
2004.08.04 |
申请号 |
EP20040009436 |
申请日期 |
1999.07.20 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KATOH, KENJI;ITOU, TAKAAKI;TANAHASHI, TOSHIO;TANAKA, HIROSHI;SUZUKI, NAOTO;KINUGASA, YUKIO |
分类号 |
F01N3/08;F01N13/02;F01N13/04;F02D41/02;F02D41/14;F02D41/30;F02D41/40;(IPC1-7):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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