发明授权
- 专利标题： Method and system for verifying the operation of an SCR catalyst
- 专利标题（中）： 验证SCR催化剂操作的方法和系统
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申请号： US12683740申请日： 2010-01-07
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公开(公告)号： US09133750B2公开(公告)日： 2015-09-15
- 发明人: Stephen Paul Levijoki , Cheryl J Stark , Scott R Gordon , Yue-Yun Wang
- 申请人： Stephen Paul Levijoki , Cheryl J Stark , Scott R Gordon , Yue-Yun Wang
- 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： F01N3/00
- IPC分类号： F01N3/00 ; F01N3/20
摘要：
A method and control system for a selective catalytic reduction (SCR) catalytic converter and an ammonia dosing module that stores ammonia in a selective catalyst reducing (SCR) catalyst and that depletes the ammonia level by discontinuing or reducing dosing. The control system also includes an SCR conversion efficiency module that determines an SCR efficiency. An SCR efficiency comparison module compares the SCR efficiency to an efficiency threshold and generates a fault indicator when the SCR efficiency is not above the efficiency threshold.