| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device which can suppress both the deterioration of smoke and the deterioration of combustion noise.SOLUTION: An ECU 36 comprises: target in-cylinder pressure change rate decision means 70 which decides a target in-cylinder pressure change rate being a target value of an in-cylinder pressure change rate within a prescribed period in which the in-cylinder pressure of an engine 10 rises accompanied by combustion to a value at which the combustion noise of the engine 10 does not exceed a target noise level; allowable heat generation rate inclination decision means 80 which decides an allowable value of an inclination of a heat generation rate in the prescribed period on the basis of a reference change rate component being a component of an in-cylinder pressure change generated by a piston motion of the engine 10 which is included in the target in-cylinder pressure change rate which also includes a combustion change rate component being a component of the in-cylinder pressure change resulting from the combustion; and a drive circuit 110 which controls an injection state so that the inclination of the heat generation rate of the internal combustion engine becomes a target heat generation inclination which is not larger than the allowable value.SELECTED DRAWING: Figure 1 |
