发明名称 |
Fuel vapor enrichment for exhaust exothermic catalyst light-off |
摘要 |
An engine system includes an engine with a secondary air source, a fuel system that communicates with the engine, and a controller that communicates with the fuel system. The controller controls a first quantity of liquid fuel to the engine at a first A/F ratio and a second quantity of vapor fuel to the engine at a second A/F ratio. The liquid and vapor fuel mixture has a third A/F ratio. A secondary air source provides additional air to the third A/F ratio. The controller determines an available A/F ratio of vapor fuel within the fuel tank and performs a comparison with a target A/F ratio range. The second quantity is set to zero if the A/F ratio of the vapor fuel is outside of the target A/F ratio range. The controller adjusts the first and second quantities based on a comparison between an exhaust A/F ratio and a target exhaust A/F ratio.
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申请公布号 |
US2005132697(A1) |
申请公布日期 |
2005.06.23 |
申请号 |
US20030739616 |
申请日期 |
2003.12.18 |
申请人 |
AMENT FRANK;FURNESS MARY B. |
发明人 |
AMENT FRANK;FURNESS MARY B. |
分类号 |
F01N3/00;F01N3/32;F02D41/00;F02D41/06;F02M25/08;(IPC1-7):F01N3/00 |
主分类号 |
F01N3/00 |
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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