| 摘要 |
PROBLEM TO BE SOLVED: To quickly raise the rotational speed of a diesel engine during shift down of an automatic transmission and to prevent lowering of a catalyst bed temperature of an exhaust emission control catalyst. SOLUTION: During shift down of the automatic transmission (yes at S102), an engine rotational speed NE becomes a target engine rotational speed (raised target engine rotational speed NEupt) according to the shift down state, and also, the intake air amount is increased at steps S110 to S114 to prevent smoke. Moreover, at steps S116 and S118, a reducing agent (fuel is used here) is added to exhaust gas, so that lowering of the catalyst bed temperature of the exhaust emission control catalyst can be prevented during increase in the intake air amount at steps S110 to S114. COPYRIGHT: (C)2008,JPO&INPIT
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