Control apparatus for general-purpose engine

An apparatus for controlling a general-purpose internal combustion engine connectable to an operating machine to be used as a prime mover of the machine, having:

• a throttle opening regulator adapted to regulate a throttle opening of a throttle valve installed in an air intake pipe of the engine such that a speed of the engine is converged to a desired engine speed set by an operator;
• a basic fuel injection amount calculator adapted to calculate a basic fuel injection amount based on the engine speed and the throttle opening;
• and
• a warm-up controller adapted to control warm-up operation of the engine by correcting the calculated basic fuel injection amount with a warm-up correction coefficient to calculate a warm-up time fuel injection amount after start operation of the engine is completed and injecting fuel from an injector by the calculated warm-up time fuel injection amount,
• wherein the improvement comprises:
• a maximum output fuel injection amount searcher adapted to search a fuel injection amount with which an output of the engine becomes maximum based on the throttle opening regulated in response to increasing/decreasing operation of the warm-up time fuel injection amount conducted when the engine speed is constant;
• and
• a warm-up correction coefficient corrector adapted to correct the warm-up correction coefficient using the searched fuel injection amount.