发明授权
- 专利标题: Diesel oxidation catalyst efficiency diagnostic method
- 专利标题(中): 柴油氧化催化剂效率诊断方法
-
申请号: US11098185申请日: 2005-04-04
-
公开(公告)号: US08443589B2公开(公告)日: 2013-05-21
- 发明人: Chuan He , Richard B. Jess , Jay Tolsma , John F. Van Gilder , Wenbo Wang
- 申请人: Chuan He , Richard B. Jess , Jay Tolsma , John F. Van Gilder , Wenbo Wang
- 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:
A diesel oxidation catalyst (DOC) testing system includes a DOC that is located in an exhaust system of a vehicle. A control module verifies proper operation of the DOC during a post-fuel injection process in an engine of the vehicle. The control module computes a predicted temperature of exhaust gases at an output of the DOC that corresponds with proper operation of the DOC during the post-fuel injection process, determines an actual temperature of the exhaust gases during the post-fuel injection process, and activates an alarm indicator when a difference between the predicted temperature and the actual temperature is greater than a first predetermined value. A first temperature sensor is located downstream from the DOC in the exhaust system. The first temperature sensor communicates with the control module, generates the actual temperature, and transmits the actual temperature to the control module.
公开/授权文献
- US20050279156A1 Diesel oxidation catalyst efficiency diagnostic method 公开/授权日:2005-12-22