PURPOSE: To make an engine securable for its smooth starting and optimum engine driving continuable, by feeding the engine with a proper fuel quantity according to a control signal out of an auxiliary control circuit when a supply voltage value in a main operation control circuit is below the specified value.
CONSTITUTION: An electronic control unit performs the control of a fuel feed quantity. That is to say, a voltage drop detection circuit 502 detects whether or not control supply voltage Vcc1 is more than the specified one. When this discrimination result is "NOT" or when the time is up in a watchdog timer 512, a warning device is set in motion. Next, a start switch 166 discriminates on whether or not it is in a state of being turned on, control for the fuel feed quantity in time of starting by an auxiliary control circuit or control for the fuel feed quantity after starting by an auxiliary 504 both take place. With this constitution, even if supply voltage drops to some extent, an engine start is securable as well as even if an operation control circuit comes into a runaway state, the drive of an engine is made to be continuable.
KISHI NORIYUKI
MARUYAMA NOBUTOSHI
MATSUSHITA ELECTRIC IND CO LTD
| JPS56135201A | 1981-10-22 |