Invention Grant
- Patent Title: Method and system for estimating reagent quality
- Patent Title (中): 估计试剂质量的方法和系统
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Application No.: US14417798Application Date: 2012-08-31
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Publication No.: US09327240B2Publication Date: 2016-05-03
- Inventor: Magnus Blanckenfiell , Per-Olof Källen
- Applicant: Magnus Blanckenfiell , Per-Olof Källen
- Applicant Address: SE Göteborg
- Assignee: Volvo Truck Corporation
- Current Assignee: Volvo Truck Corporation
- Current Assignee Address: SE Göteborg
- Agency: WRB-IP LLP
- International Application: PCT/EP2012/003658 WO 20120831
- International Announcement: WO2014/032686 WO 20140306
- Main IPC: G01N15/06
- IPC: G01N15/06 ; G01N33/00 ; G01N33/48 ; F01N3/20 ; F01N3/00 ; B01D53/94 ; F01N11/00
Abstract:
In a method for estimating the quality of an urea based reagent in terms of urea concentration, the reagent is injected upstream of a SCR catalyst in an exhaust aftertreatment system. A demanded NOx conversion rate is set substantially lower than a currently estimated maximum NOx conversion rate of the SCR catalyst. An actual NOx conversion rate is monitored for a certain time period. The urea concentration of the reagent is estimated based on comparing the monitored actual NOx conversion and the demanded NOx conversion during the time period. A corresponding system is also disclosed.
Public/Granted literature
- US20150209730A1 METHOD AND SYSTEM FOR ESTIMATING REAGENT QUALITY Public/Granted day:2015-07-30
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