PURPOSE: To reduce a fuel temperature rise in a fuel tank by determining fuel supply quantity on the basis of mixing ratio detection result to conduct fuel supply control, and driving a fuel supplying means by a determined work volume for a determined time when the operating state is changed in the direction of increasing the necessary fuel at a determined rate.
CONSTITUTION: When a blend ratio is detected by an ECU 14, the blend ratio correction coefficient corresponding to this is determined. Then, injector driving time is determined. In the case of normal operation, the integrated quantity of throttle valve opening, its opening change, and acceleration nonsynchronous injection within a past determined time satisfies all specified relations, the count of an integrating timer is compared with an overcontrol time judgment value, it is judged that count is to be stopped in the case of the former>the latter, and overcontrol is to be performed in the case of the former≤the latter, and a fuel consumption quantity is determined from injection driving time and engine rotating speed when it is not under overcontrol. Consequently, a work volume is obtained, and a fuel pump 26 is driven on the basis of this. Then, normal operation time control value is calculated to control the drive of an ISC valve 10 and an ignition plug 44. Hence, a proper fuel according to blend ratio can be supplied.
YOKOYAMA TAKANAO
NANBA MUNEYOSHI
KATO YOSHIHIKO
IIDA KAZUMASA
MIYAMOTO KATSUHIKO
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