| 摘要 |
<P>PROBLEM TO BE SOLVED: To control exhaust emission and improve fuel consumption, and the like, by controlling a drive voltage to a fuel injection valve. <P>SOLUTION: For an electromagnetically-driven fuel injection valve for an internal combustion engine, during a predetermined period from its valve opening timing to a time point before a valve body reaches maximum displacement, at low temperature start or depending on an operation mode, a high voltage is applied from a high voltage drive circuit to improve valve opening responsiveness, and after the predetermined period, by switching to application of low voltage from a low voltage drive circuit while the valve body keeps the maximum displacement, a bound at collision of the valve body to a valve opening stopper is prevented, and after elapse of a predetermined interval period after completion of application at low voltage, the high voltage is applied from the high voltage drive circuit to prevent a bound at valve closing and valve seating. <P>COPYRIGHT: (C)2013,JPO&INPIT |
