SYSTEM AND METHOD FOR MONITORING PARTICULATE FILTER CONDITION IN AN AFTERTREATMENT SYSTEM

摘要

A system and method for monitoring filtering condition in an aftertreatment system comprises measuring a first pressure upstream of a first particulate filter in the aftertreatment system. A second pressure downstream of the first particulate filter and upstream of a second particulate filter in the aftertreatment system is measured. A third pressure downstream of the second particulate filter is also measured. A difference in pressure between the second pressure and the third pressure is determined which corresponds to a filtering condition of the first particulate filter. The difference in pressure is compared with a predetermined threshold. If the difference in pressure exceeds the predetermined threshold the failure of the first particulate filter is identified.