发明名称 |
Closed loop control for desulfating a NOx trap |
摘要 |
A system and method for desulfating an NOx trap utilizes a closed loop control of the air-to-fuel (A/F) ratio to accurately maintain a precise A/F ratio during desulfation. An oxygen sensor is positioned in the middle of the trap to provide an actual A/F ratio measurement, which is subsequently compared to a target A/F ratio to generate a correction signal to adjust operation of the engine's fuel injector(s). The trap oxygen sensor can also be used to adaptively update engine state conditions for a more precise switch-over to a trap regeneration phase. |
申请公布号 |
US5983627(A) |
申请公布日期 |
1999.11.16 |
申请号 |
US19970922104 |
申请日期 |
1997.09.02 |
申请人 |
FORD GLOBAL TECHNOLOGIES, INC. |
发明人 |
ASIK, JOSEPH RICHARD |
分类号 |
F02D41/04;F01N3/08;F01N13/02;F01N13/04;F02D41/00;F02D41/02;F02D41/14;F02D41/34;(IPC1-7):F01N3/00 |
主分类号 |
F02D41/04 |
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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