发明名称 |
Exhaust gas purifying device |
摘要 |
<p>A nitrogen oxide absorbing material (38) which absorbs nitrogen oxides when the reduction component concentration of exhaust gas in the exhaust passage (31) of an engine (1) is lower than a predetermined concentration, and discharges nitrogen oxides when the reduction component concentration of exhaust gas in the exhaust passage (31) of the engine (1) is higher than the predetermined concentration, and a catalyst (38) which promotes reduction of the discharged nitrogen oxides by a reduction component are provided. A controller (40) first reduces the reduction component concentration of the exhaust gas over a first predetermined time period by, for example, advancing the fuel injection timing. The controller (40) then decreases the reduction component concentration of the exhaust gas over a second predetermined time period by, for example, retarding the fuel injection timing. <IMAGE></p> |
申请公布号 |
EP0994243(A2) |
申请公布日期 |
2000.04.19 |
申请号 |
EP19990119951 |
申请日期 |
1999.10.12 |
申请人 |
NISSAN MOTOR CO., LTD. |
发明人 |
KAMIJO, MOTOHISA;KAMIKUBO, MAKI;AKAMA, HIROSHI;ITOU, JYUNJI;SHINZAWA, MOTOHIRO;KITAHARA, YASUHISA |
分类号 |
B01D53/94;F01N3/08;F01N3/20;F01N9/00;F02D41/02;F02D41/40;(IPC1-7):F01N3/08 |
主分类号 |
B01D53/94 |
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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