发明名称 |
Exhaust gas purification system for lean burn engine |
摘要 |
<p>An exhaust gas purification system for a lean burn engine comprising a thermal mass unit (32) and a NOx conversion catalyst unit (34) downstream of the thermal mass unit (32). The NOx conversion catalyst unit includes at least one catalyst section (36). Each catalyst section includes a catalytic layer (38) for converting NOx coupled to a heat exchanger (40). The heat exchanger portion of the catalyst section acts to maintain the catalytic layer (38) substantially at a desired temperature and cools the exhaust gas flowing from the catalytic layer into the next catalytic section in the series. In a further aspect of the invention, the exhaust gas purification system includes a dual length exhaust pipe (20) upstream of the NOx conversion catalyst unit (34). The dual length exhaust pipe (20) includes a second heat exchanger (24) which functions to maintain the temperature of the exhaust gas flowing into the thermal mass (32) downstream near a desired average temperature. <IMAGE></p> |
申请公布号 |
EP1111212(A2) |
申请公布日期 |
2001.06.27 |
申请号 |
EP20000311451 |
申请日期 |
2000.12.20 |
申请人 |
FORD GLOBAL TECHNOLOGIES, INC. |
发明人 |
HAINES, LELAND MILBURN |
分类号 |
B01D53/94;F01N3/20;F01N3/28;F01N13/02;(IPC1-7):F01N3/20 |
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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