| 摘要 |
PROBLEM TO BE SOLVED: To provide a device in which a normal mode for performing a normal operation when an engine is started and a special mode for performing blank ignition can be selected, heavey carbonization of a spark plug is prevented and a starting time is prevented from being unnecessarily extended. SOLUTION: When a starter switch is turned ON (S21) or when an ultra-slow speed rotation occurs (S22), a special mode is selected (S24) while a mode change-over switch is turned ON, and then a fuel injection prohibiting flag FLGPE is set (FLGPE←1) (S26) until the number of times of spark plug electrical discharging operations reaches a predetermined number of times (S25). At this time, a fuel injection pulse width Ti is set to 0 (Ti←0). Accordingly, when a special mode is selected, the fuel injection is stopped while the number of electrical discharging times of the spark plug reaches the set number of times, and heavey carbonization is prevented by blank ignition at the spark plug. In addition, when the mode changing-over switch is turned OFF and the normal mode is selected, the fuel injection prohibiting flag is cleared (S27). At this time, the blank ignition is not carried out, a fuel injection is carried out as usual and a starting time is prevented from being extended.
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