| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device for a diesel engine to suppress the increase of noise occasioned by a change of a pilot injection amount and worsening of emission by correcting a pilot injection amount based on unevenness in an injection amount of an injector and deterioration. SOLUTION: At a step 101, an injection correction amount eqcy classified by a cylinder is calculated such that the engine rotation speed of each cylinder during idling is the average idle rotation speed of a total of cylinders. At a step 102, a lower limit value eqcymn of an injection correction amount is calculated. At a step 103, a temporary pilot injection correction amount tqcypl of each cylinder is calculated. When the temporary pilot injection correction amount is 0 or less, a pilot injection correction amount is set to 0. When the temporary pilot injection correction amount is higher than an upper limit guard value EQPLCMX, the pilot injection correction amount is set to an upper limit guard value. When the temporary pilot injection correction amount is lower than the upper limit guard value EPLCMX, the pilot injection correction amount is set to a temporary pilot injection correction amount. A pilot injection amount is calculated based on the calculated pilot injection correction amount.
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