| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely suppress increase in combustion noise while properly controlling the air-fuel ratio of air fuel mixture, in deceleration to an operation condition where an engine load is low and an inside EGR rate is high.SOLUTION: In deceleration of shifting from a first operation condition of a region where the excess air rate of air-fuel mixture is set to 1 or less to a second operation condition where an engine load is lower and an inside EGR rate is higher than those of the first operation condition in the region, a fuel injection device 15 is made temporarily execute, in addition to first injection where a smaller amount of fuel than an original injection amount corresponding to the second operation condition is injected before a compression top dead point, second injection where an amount or more of fuel, obtained by subtracting an injection amount due to the first injection from the original injection amount corresponding to the second operation condition, is injected in a first half of an expansion process.</p> |
