Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
John Johnson0
Gordon Parker0
Maruthi Devarakonda0
Date of Patent
July 31, 2012
0Patent Application Number
123245330
Date Filed
November 26, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An exhaust aftertreatment system comprising a selective reduction catalyst, a NOx sensor or an NH3 sensor, a urea injector, and a dosing control unit, wherein the dosing control unit calculates the rate of urea injection by estimating the concentrations of NO and NO2 in the exhaust downstream of the SCR catalyst.
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