Patent ID: 9718027
Date: 2017-08-01
CPC Classifications: B01D,F01N,G01N,Y02A,Y02T,Y10T

Claim:
1. A method for mitigating a urea deposit within a selective catalytic reduction (SCR) system in exhaust receiving communication with an exhaust gas stream produced by an engine system, the exhaust gas stream flowing from an engine of the engine system to a tailpipe of the engine system, the method comprising: determining a mass of an accumulated urea deposit present within a SCR system, the SCR system including a SCR catalyst and SCR piping; comparing the mass of the accumulated urea deposit with a deposit upper threshold limit; initiating a SCR regeneration event when the mass of the accumulated urea deposit is greater than the deposit upper threshold limit; determining an amount of NH comparing the amount of NH terminating the SCR regeneration event when the amount of NH