| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive control device for an electromagnetic valve capable of improving control accuracy during an actual valve opening period of an electromagnetic valve by acquiring the actual valve opening period of the electromagnetic valve correctly.SOLUTION: Valve closing timing tCL of a fuel injection valve is detected, valve opening timing tOP is estimated based on the valve closing timing tCL, and a valve opening command signal SDCTL of the fuel injection valve is output based on the valve opening timing tOP. A time point when the valve opening command signal SDCTL is turned off, that is valve closing operation time Toff corresponding to the time from valve closing command timing tIE to the valve closing timing tCL, is calculated, and the valve opening timing tOP of the fuel injection valve is estimated based on valve opening command time Ti at which the valve closing operation time Toff takes a peak value ToffP, the valve closing operation time Toff and transfer time &Dgr;T required for the transfer from a valve opening state to a closed state by an energization force of a second spring for energizing a valve body in a valve closing direction. |
