| 摘要 |
PROBLEM TO BE SOLVED: To reduce the amount of soot to be mixed into oil by controlling a fuel injection timing or injection pressure to reduce soot adhered to a cylinder liner even when fuel sprays or flames in a combustion chamber extend or an ignition delay occurs for a longer period as operation environmental conditions such as atmospheric temperature or atmospheric pressure are changed. SOLUTION: This fuel injection control device includes a standard injection timing setting means 41 for presetting a standard injection timing on the basis of an engine speed and a fuel injection amount, a penetration force determining means 45 using at least one among an atmospheric pressure value detected by an atmospheric pressure sensor, an in-cylinder pressure estimated value at the start of injection, and an ignition delay estimated value from the start of fuel injection to the start of ignition from a fuel injection valve, for determining whether the penetration force of fuel spray in a cylinder is in the increasing state, and an injection timing correcting means for, when the penetration force determining means determines that the penetration force of fuel spray is in the increasing state, correcting the standard injection timing to the advance angle side to suppress the penetration force of fuel spray. COPYRIGHT: (C)2011,JPO&INPIT |
