发明名称 |
Method for reducing cold-start hydrocarbon emissions in a gasoline, natural gas, or propane fueled engine |
摘要 |
A partial oxidation catalyst is interposed between an exhaust manifold and a catalytic converter in the exhaust system of a gasoline, natural gas, or propane fueled engine. The engine is started from a cold-start and the exhaust gas stream emitted during an initial period of operation after the cold-start has a lambd value <1 as a result of a rich combustion mixture provided to the engine during cold-start operation. Hydrocarbons passing through the partial oxidation catalyst during the initial engine operating period are partially oxidized and hydrogen produced as a result of the oxidation process is used to promote faster light-off of the catalytic converter in the exhaust system. Also, hydrocarbon emissions discharged into the surrounding environment are reduced during the initial period following cold-start. |
申请公布号 |
US6244044(B1) |
申请公布日期 |
2001.06.12 |
申请号 |
US19990399878 |
申请日期 |
1999.09.20 |
申请人 |
SOUTHWEST RESEARCH INSTITUTE |
发明人 |
BARTLEY GORDON J. |
分类号 |
B01D53/94;F01N3/20;F01N3/28;F01N13/02;(IPC1-7):F01N3/00 |
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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