Method for controlling regeneration of diesel particulate filter in construction machinery

1. A method for controlling regeneration of a diesel particulate filter in construction machinery, comprising:

a first active regeneration operation of actively regenerating a diesel particulate filter (DPF) according to a predetermined first active regeneration schedule when a quantity of soot inside the DPF is within a predetermined allowance section;

a second active regeneration operation of actively regenerating the diesel particulate filter according to a second active regeneration schedule, which is different from the first active regeneration schedule, according to the quantity of soot when the quantity of soot is within a general section larger than that of the allowance section or a danger section larger than that of the general section; and

a manual active regeneration performance inducing operation of inducing performance of a manual active regeneration when the quantity of soot exceeds the danger section,

wherein the second active regeneration operation includes a second active regeneration schedule adjusting operation of performing an active regeneration until the quantity of soot is smaller than that of the danger section according to a second active regeneration schedule set to be earlier than the first active regeneration schedule when the quantity of soot is within the danger section.

2. The regeneration controlling method of claim 1 , wherein the second active regeneration operation includes a first active regeneration schedule adjusting operation of rescheduling a first active regeneration to an earliest time according to the first active regeneration schedule to immediately perform the first active regeneration when the quantity of soot is within the general section.

3. The regeneration controlling method of claim 1 , wherein in the second active regeneration schedule adjusting operation, a given active regeneration corresponding to the earliest time of the second active regeneration schedule is performed, wherein the given active regeneration corresponding to the earliest time can be an active regeneration scheduled for a next turn of the active regeneration which is advanced and continuously performed according to the second active regeneration schedule, and thereafter the second active regeneration schedule is adjusted so that a next earliest active regeneration scheduled for the next turn is performed according to the second active regeneration schedule until the quantity of soot is smaller than that of the danger section, and then the active regeneration is next performed according to the adjusted second active regeneration schedule.

4. The regeneration controlling method of claim 2 , wherein in the first active regeneration schedule adjusting operation, the first active regeneration scheduled at the earliest time is advanced and performed immediately according to the first active regeneration schedule, and thereafter the first active regeneration schedule is adjusted so that a second active regeneration after the first active regeneration is also immediately performed according to the first active regeneration schedule, and then a process returns to the first active regeneration operation.

5. The regeneration controlling method of claim 2 , wherein in the first active regeneration schedule adjusting operation, the first active regeneration of the first active regeneration schedule is advanced and immediately performed according to the first active regeneration schedule, and a next turn of the first active regeneration of the first active regeneration schedule is also advanced and continuously performed according to the first active regeneration schedule.

6. The regeneration controlling method of claim 1 , wherein the first active regeneration schedule is an active regeneration schedule set considering a natural regeneration, and the second active regeneration schedule is an active regeneration schedule set considering that a natural regeneration is not performed in the construction machinery.