| 摘要 |
PROBLEM TO BE SOLVED: To suppress the dispersion of a main injection amount by properly controlling the intervals of conducting a current to an electromagnetic spill valve 2 after pilot injection, if so, to a diesel engine prior to main injection. SOLUTION: A second ON signal is output form an ECU 3 to a spill valve driving circuit 17 for starting the main injection and a second driving current A2 is conducted from the spill valve driving circuit 17 to the electromagnetic spill valve 2 after receiving the ON signal. The second driving current A2 is detected, and when its peak value is larger than a set value, the next second spill valve closing time is delayed. Thus, intervals between a first spill valve opening time and a second spill valve closing time can be kept in a proper range and the closing operation of the electromagnetic spill valve 2 in the main injection can be stabilized. |
