| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection method for an engine, capable of restraining extreme increase of engine noise at shifting from an operation region, wherein pilot injection is required to an operation region to one where the pilot injection is not required. SOLUTION: When shifting from the operation region A, where the pilot injection is required to the operation region B where the pilot injection is not required, pilot injection is stopped stepwise for each cylinders. The respective cylinder stops the pilot injection in the order, therefore, the combustion sound is enlarged stepwise in cylinders unit. Accordingly, the rapid increase in engine noise is avoided, a moment for shifting is hard to be noticed, and jarring feeling is reduced.
|
