Patent ID: 7062906

Claim:
A regeneration device for a filter which traps particulate matter in an exhaust gas of an engine, comprising: a sensor which detects an engine running point containing an engine load, a controller comprising a map which defines a low load region relating to engine running points, the controller being programmed to: compute a deposition amount of particulate matter in the filter, determine whether or not the detected engine running point is in the low load region referring to the map, when the deposition amount of particulate matter is more than a first reference amount, immediately start a first filter regeneration control by raising a temperature of the exhaust gas, when the detected engine running point is not in the low load region, and start a second filter regeneration control by raising the temperature of the exhaust gas after the deposition amount of particulate matter exceeds a second reference amount, when the detected engine running point is in the low load region, wherein the second reference amount is larger than the first reference amount.