发明授权
- 专利标题： Exhaust diagnostic systems and methods for resetting after operation with poor reductant quality
- 专利标题（中）： 排气诊断系统和操作后复位的方法，还原剂质量差
-
申请号： US12606483申请日： 2009-10-27
-
公开(公告)号： US08286419B2公开(公告)日： 2012-10-16
- 发明人: Stephen Paul Levijoki , Scott R. Gordon , Cheryl J Stark , Paul Jasinkiewicz , Brett B Thompson
- 申请人： Stephen Paul Levijoki , Scott R. Gordon , Cheryl J Stark , Paul Jasinkiewicz , Brett B Thompson
- 专利权人： GM Global Technology Operations LLC
- 当前专利权人： GM Global Technology Operations LLC
- 主分类号： F01N3/00
- IPC分类号： F01N3/00
摘要：
An exhaust diagnostic system includes a selective catalyst reduction (SCR) efficiency testing module that determines an efficiency of a SCR catalyst. An exhaust gas temperature management module selectively adjusts a temperature of the SCR catalyst to a predetermined temperature range using intrusive exhaust gas temperature management. A test enabling module initiates an SCR efficiency test using the SCR efficiency module after failing a prior SCR efficiency test and while the temperature of the SCR catalyst is within the predetermined temperature range.
公开/授权文献
信息查询
