Patent ID: 9206727
Filing Date: 2015-12-08
Classification: B01D,F01N,F02D,G01M,G05B,Y02T

Abstract:
1. A method of monitoring an exhaust treatment system of a vehicle, comprising: monitoring regeneration of a particulate filter of the exhaust treatment system; determining, by a module comprising a processor, a modeled resistance of exhaust flow in the exhaust treatment system; determining a measured resistance of exhaust flow in the exhaust treatment system based on a regression algorithm that uses a plurality of values of a particulate filter temperature, an exhaust flow temperature and a delta pressure that are measured over a period of time; determining that the regeneration of the particulate filter does not occur more frequently than necessary in response to determining that a ratio of the modeled resistance to the measured resistance is not greater than a threshold ratio; evaluating a plurality of triggering conditions that trigger the regeneration of the particulate filter in response to determining that the ratio is greater than the threshold ratio; determining that the regeneration of the particulate filter occurs more frequently than necessary in response to determining that the plurality of triggering conditions indicate that a regeneration is not needed; determining that the regeneration of the particulate filter does not occur more frequently than necessary in response to determining that the plurality of triggering conditions indicate that a regeneration is needed; and generating at least one of a warning signal and a message based on whether the regeneration of the particulate filter occurs more frequently than necessary, wherein each of the modeled resistance and the measured resistance dynamically change such that the ratio is based on a dynamically changing measured resistance with respect to a dynamically changing modeled resistance.