Patent ID: 6725652
Filing Date: 2004-04-27
Classification: F01N,Y02T,Y10S

Abstract:
A diesel particulate filtering device, comprising:a diesel particulate filter unit for cleaning exhaust gas of an internal combustion engine, wherein the cleaning of exhaust gas and recovery of the diesel particulate filter unit clogged up through the cleaning of exhaust gas are performed alternately; exhaust pressure sensors provided respectively on an upstream side and on a downstream side of the diesel particulate filter unit; a diesel particulate filter controller for inputting detected values of the exhaust pressure sensors to determine a recovery time of the diesel particulate filter unit by using the ratio between an upstream-side exhaust pressure value and a downstream-side exhaust pressure value; and determination-value update means in which the diesel particulate filter controller compares the detected value of the downstream-side exhaust pressure sensor with a standard exhaust pressure value stored in advance to reset a determination value for determining the recovery time.