| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a regeneration control device for a particulate filter allowing highly precise estimation of a trapped ash amount. SOLUTION: An exhaust emission control device 10 comprises a control part 16, the particulate filter 44, pressure sensors 50, 51 and temperature sensors 52, 53. The control part 16 determines the completion of regeneration when a temperature detected by the temperature sensor 52 keeps a preset value or higher for a predetermined time or longer and a difference between temperatures detected by the temperature sensors 52, 53 is a preset value or less. The control part 16 finds the trapping amount of the filter 44 in accordance with a difference between pressures detected by the pressure sensors 50, 51 right after the completion of the regeneration and defines the trapping amount as an ash amount. In accordance with the ash amount, the control part 16 corrects the next conditions of forcible regeneration.</p> |
