| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an emission controlling method and a system thereof capable of performing a sufficient regeneration while avoiding local excessive temperature rise even in a case that PM over an accumulation limit is accumulated in a continuous regeneration DPF and can not be regenerated under a regular regeneration control. <P>SOLUTION: According to the emission controlling method for an internal combustion engine 10, when it is determined that the regeneration is incomplete after a regeneration treatment under a first regeneration control of the continuous generation DPF13b, a regeneration treatment under the first regeneration control is performed while extending regeneration time until it is determined that the regeneration is completed from the next time, and when it is still determined that the regeneration is incomplete even though the regeneration treatment exceeds a first predetermined number of regeneration treatments, a regeneration treatment under a second regeneration control for advancing main injection timing to increase NOx while post-injecting to control the temperature rise so that the emission temperature becomes 400°C to 500°C is performed from the next time. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
