| 摘要 |
In an exhaust gas purification system ( 1 ) provided with a continuous regeneration type DPF device ( 13 ) and DPF control means ( 30 C), when a collecting quantity (DeltaPm) of PM exceeds the predetermined judgment collecting quantity (DeltaPm 0 ), a number-of-regeneration-times coefficient (Rc) serving as an index of the number of regeneration times to a travel distance is compared with a predetermined judgment coefficient value (R 0 ). When the number-of-regeneration-times coefficient (Rc) is smaller than the predetermined judgment coefficient value (R 0 ), automatic traveling regeneration is performed and when the number-of-regeneration-times coefficient (Rc) is equal to or more than the predetermined judgment coefficient value (R 0 ), manual regeneration is performed. Thereby, in the case of regeneration of the continuous regeneration type DPF device ( 13 ) of the exhaust gas purification system ( 1 ), it is possible to greatly decrease the frequency of manual regeneration in which a driver stops a vehicle to perform forced regeneration by a manual regeneration switch and improve the operability for the driver. Moreover, it is possible to solve the oil dilution problem due to a lot of unburned oil injected for DPF regeneration.
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