Integrated DPF loading and failure sensor

摘要

An integrated DPF loading and failure sensor with two particulate matter sensors (140,150) one located upstream of the filter and the other located downstream of the filter. The sensors (140,150) are integrated into the leading and trailing edges of the filter. Integrating two particulate matter sensors with the DPF will allow the proper interval between reconditioning of DPF, since the particulate matter collected on the filter is measured and not estimated. The upstream sensor (140) determines the amount of particulate matter entering the filter (145). In addition to using the first sensor (140) for loading, the second sensor (150), at the trailing face of the filter (145), can be used to determine break-through of the DPF. The second sensor (150) measures the particulate matter escaping the filter.