发明名称 |
SYSTEM AND METHOD FOR CONTROLLING AMMONIA LEVELS IN A SELECTIVE CATALYTIC REDUCTION CATALYST USING A NITROGEN OXIDE SENSOR |
摘要 |
A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level based on the one of the predetermined value and the input received from the nitrogen oxide sensor.
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申请公布号 |
US2013025261(A1) |
申请公布日期 |
2013.01.31 |
申请号 |
US201113192859 |
申请日期 |
2011.07.28 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS LLC;SUN MIN;PERRY KEVIN L.;DIBBLE DONOVAN L.;KIM CHANG H.;FURNESS MARY BETH |
发明人 |
SUN MIN;PERRY KEVIN L.;DIBBLE DONOVAN L.;KIM CHANG H.;FURNESS MARY BETH |
分类号 |
F01N3/18 |
主分类号 |
F01N3/18 |
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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