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

摘要

An object of the present invention is to reliably suppress and prevent deterioration of start characteristics of a fuel injection valve at engine start caused by sludge. When a vehicle is started, non-injection energization is performed on fuel injection valves 2-1 to 2-n (S102), the valve closing time at that time is measured (S104), and the valve closing time is within a predetermined range. If it exceeds (S106), the fuel injection valves 2-1 to 2-n are determined based on the energization conditions corrected until the engine speed exceeds the predetermined speed as a cause of a decrease in the starting state of the engine 3. On the other hand, energization control is performed (S110, S112), and a decrease in startability at the time of engine start is suppressed and prevented.