Fuel injection valve energization control method and common rail fuel injection control device

摘要

[Problem] Suppression and prevention of deterioration of the starting characteristic of the fuel injection valve at the time of engine start resulting from sludge are certainly suppressed. [Solving means] No injection current is supplied to the fuel injection valves 2-1 to 2-n at vehicle startup (S102), the valve closing time at that time is measured (S104), and the valve closing time is in a predetermined range. In the case of exceeding (S106), the fuel injection valve 2-1 is based on the energized condition corrected until the engine speed exceeds the predetermined speed, because there is a factor that lowers the starting state of the engine 3. And power supply control for 2-n) (S110, S112), and the fall of startability at the time of engine start is suppressed and prevented.