Patent ID: 7200991
Filing Date: 2007-04-10
Classification: F02D

Abstract:
1. A regeneration device for a filter which traps particulate matter contained in an exhaust gas of a diesel engine for a vehicle, comprising: a parameter detecting sensor which detects a parameter relating to an amount of particulate matter trapped in the filter; a removal mechanism which removes the particulate matter trapped by the filter; a sensor which detects a rotation speed of the diesel engine; and a programmable controller programmed to: determine whether or not the amount of particulate matter trapped in the filter has reached a predetermined amount; calculate an idling frequency which is defined as the proportion of time when the diesel engine runs idle during a latest predetermined time period; determine a traveling condition of the vehicle based on the idling frequency, wherein the latest predetermined period of time is of sufficient duration to permit calculation of the idling frequency upon which the traveling condition determination can be made; and control the removal mechanism, when the amount of trapped particulate matter has reached the predetermined amount, to remove the particulate matter by applying a predetermined removal pattern which is different for each traveling condition of the vehicle.