Patent ID: 6971970

Claim:
A regeneration device for a diesel particulate filter which traps particulates in exhaust gas discharged from a vehicle diesel engine, wherein the diesel engine outputs an engine torque through an automatic transmission to drive wheels; the regeneration device comprising: a condition detecting sensor which detects a condition of the diesel particulate filter; and a controller which stores a map defining a predetermined running region of a diesel engine in which self-ignition of trapped particulates is possible, the controller being programmed to: determine whether or not regeneration of the filter is required based on the detected condition; modify a running point of the diesel engine to a point within the predetermined running region from a point outside the predetermined running region, when the regeneration of the filter is required; set a target speed ratio of the automatic transmission based on an engine rotation speed at the modified running point; and control a speed ratio of the automatic transmission to the target speed ratio.