Patent ID: 8783022
Filing Date: 2014-07-22
Classification: F01N,Y02T

Abstract:
1. An exhaust aftertreatment system for treating exhaust generated by a diesel engine, the system comprising: a filtration station for filtering particulate material from the exhaust; a substrate located downstream from the filtration station; a pressure data generator for generating data indicative of a pressure differential across a constant flow area control volume of the exhaust aftertreatment system, the constant flow area control volume including the substrate; a reactant dispenser for dispensing reactant into the exhaust; and a controller that controls a dosing rate at which the reactant dispenser dispenses the reactant into the exhaust, wherein the controller uses the data indicative of the pressure differential across the constant flow area control volume as a parameter for determining the dosing rate at which the reactant dispenser dispenses the reactant into the exhaust, and wherein the controller determines an exhaust flow rate based on a correlation of the data from the pressure data generator with the constant flow area control volume.