Patent ID: 9091190
Filing Date: 2015-07-28
Classification: F01N,F02D,Y02T

Abstract:
1. A method of regenerating a particulate filter, the method comprising: monitoring, via a controller, an exhaust gas pressure drop across the particulate filter included with the vehicle exhaust aftertreatment device; determining, via the controller, a soot mass estimate from a monitored exhaust gas pressure drop; determining, via the controller, an ash volume estimate representative of an amount of ash within the particulate filter; determining, via the controller, an ash correction factor from the soot mass estimate and the ash volume estimate; calculating, via the controller, a corrected soot mass value by multiplying the ash correction factor with the soot mass estimate; and regenerating the particulate filter by combusting soot in the particulate filter when the corrected soot mass value exceeds a threshold.