| 摘要 |
The invention provides an exhaust purification system for working machine. The system reliably issues filter regeneration warnings to the operator, prompting manual regeneration, so that damage to the DPF device can be avoided. When a PM estimate becomes higher than a given value, a screen (6a) displays a warning message prompting manual regeneration. If the warning message failed to prompt the operator to perform manual regeneration and reference time t1 has passed since the display of the warning message, a speaker (6c) outputs a first warning sound. When the operator notices the first warning sound and turns on a regeneration switch (38), regeneration control is started. If the operator fails to notice the first warning sound and reference time t2 has passed since the display of the warning message, the speaker (6c) instead outputs a second warning sound louder than the first warning sound. When the operator notices the second warning sound and turns on the regeneration switch (38), regeneration control is started. |
