Fuel supply control system

摘要

A fuel supply control system for an internal combustion engine has a step motor driver for outputting excitation pulses to an excitation circuit for a step motor and a comparator supplied with a target step position of the step motor from a target step position memory and a present step position of the step motor from a current step position memory. The comparator is responsive to an output from a step motor speed setting unit which corresponds to a main power supply voltage detected by a voltage detector for comparing the target and present step positions. The step motor driver is responsive to an output from the comparator for issuing excitation pulses to the excitation circuit to turn the step motor by one step in one direction or the other until the present step position is equal to the target step position.