To improve the durability of an injector driver by providing a temperature detecting means detecting the temperature of the injector driver driving a fuel injection valve and an engine speed reducing means.
An electronic control device 42 arithmetically processes the detection signals of various sensors based on a control map and transmits control signals to an injector driver 49, an ignition plug 14, an oil pump 21, a pre-load fuel pump 30 and an electric motor 91. The injector driver 49 boosts a battery power supply and drives a fuel injection valve 13 with a switching circuit by a power transistor. The injector driver temperature is read by the temperature detecting means 92 of the injector driver 49. When the temperature exceeds the guaranteed reference temperature, the engine speed is reduced, the number of excitations of the fuel injection valve 13 is reduced, and the temperature of the injector driver 49 is lowered, thereby the durability of the injector driver 49 can be improved.
KATO MASAHIKO
MOTOSE JUN
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