Patent ID: 6931842

Claim:
A regeneration device for a filter which traps a particulate matter contained in the exhaust gas of an engine, the device regenerating the filter by burning the particulate matter trapped in the filter by raising a temperature of the filter, the device comprising: an exhaust gas temperature adjusting mechanism which adjusts a temperature of the exhaust gas; an exhaust gas flow rate adjusting mechanism which adjusts a flow rate of the exhaust gas; and a programmable controller programmed to: determine whether or not a regeneration condition for the filter is satisfied; raise the temperature of the exhaust gas to a first target exhaust gas temperature via the exhaust gas temperature adjusting mechanism when the regeneration condition is satisfied; determine whether or not the engine is in a predetermined rapid deceleration state; and control the temperature of the exhaust gas to a second target exhaust gas temperature lower than the first target exhaust gas temperature via the exhaust gas temperature adjusting mechanism while increasing the flow rate of the exhaust gas via the exhaust gas flow rate adjusting mechanism, when the engine is in the predetermined rapid deceleration state during regeneration.