| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control system in highlands, capable of maintaining power performance in a normal travel mode in the highland, securing an oxygen amount allowing for post injection in a regeneration mode, and changing over the normal mode into the regeneration mode or vice versa without giving a sense of incongruity during the changeover. <P>SOLUTION: In the normal travel mode in the highlands, when raising the temperature of exhaust gas from a diesel engine 10 to automatically regenerate a DPD 25, the exhaust emission control system in the highlands determines a highland full-load injection amount for travel from atmospheric pressure in the highlands and an engine speed during travel, and in the regeneration mode, it determines such a highland travel regeneration injection amount that the highland full-load injection amount is reduced on the basis of a post injection amount. The system gradually decreases the injection amount from the highland full-load injection amount into the highland regeneration travel injection amount during rushing from the normal travel mode in the highlands into the highland regeneration mode, uses the decrement for post injection, and increases the injection amount from the highland regeneration travel injection amount into the highland full-load injection amount after finishing the regeneration. <P>COPYRIGHT: (C)2012,JPO&INPIT |
