发明申请
US20120085082A1 SYSTEM AND METHOD FOR DETECTING LOW QUALITY REDUCTANT AND CATALYST DEGRADATION IN SELECTIVE CATALYTIC REDUCTION SYSTEMS
有权
用于检测选择性催化还原系统中低质量降低和催化降解的系统和方法
- 专利标题： SYSTEM AND METHOD FOR DETECTING LOW QUALITY REDUCTANT AND CATALYST DEGRADATION IN SELECTIVE CATALYTIC REDUCTION SYSTEMS
- 专利标题（中）： 用于检测选择性催化还原系统中低质量降低和催化降解的系统和方法
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申请号： US12974366申请日： 2010-12-21
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公开(公告)号： US20120085082A1公开(公告)日： 2012-04-12
- 发明人: Stephen Paul Levijoki , Yue-Yun Wang , Brett B. Thompson
- 申请人： Stephen Paul Levijoki , Yue-Yun Wang , Brett B. Thompson
- 申请人地址： US MI Detroit
- 专利权人： GM Global Technology Operations LLC
- 当前专利权人： GM Global Technology Operations LLC
- 当前专利权人地址： US MI Detroit
- 主分类号： F01N3/20
- IPC分类号： F01N3/20 ; F01N3/18
摘要：
A control system for a selective catalytic reduction (SCR) system includes a conversion efficiency determination module, an ammonia slip determination module, and a diagnostic module. The conversion efficiency determination module determines a conversion efficiency of an SCR catalyst. The ammonia slip determination module determines an amount of ammonia slip across the SCR catalyst when the conversion efficiency is less than a predetermined threshold. The diagnostic module determines pass/fail statuses of a reductant supply and the SCR catalyst based on the amount of ammonia slip and at least one ammonia slip threshold.
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