Patent ID: 8875496
Filing Date: 2014-11-04
Classification: F01N,Y02T

Abstract:
1. A regeneration control system for an exhaust filter in an internal combustion engine system comprising: a first sensing mechanism configured to monitor an exhaust flow resistance of the exhaust filter; a second sensing mechanism configured to monitor an attenuation of electromagnetic energy transmitted through the exhaust filter; an electronic controller coupled with each of the first and second sensing mechanisms, the electronic controller being configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter; and the electronic controller being further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter via a regeneration timing routine, responsive to an operating state of the internal combustion engine system; wherein the operating state of the internal combustion engine system includes a relative soot loading state of the exhaust filter; and wherein the electronic controller is configured to weight the data such that data from the first sensing mechanism is given zero weight if the exhaust filter is in a lower soot loading state, and data from the second sensing mechanism is given zero weight if the exhaust filter is in a higher soot loading state.