Throttle control apparatus and method for direct-fuel-injection-type internal combustion engine

摘要

A direct-fuel-injection-type internal combustion engine (10) is equipped with an injector (14) for injecting fuel directly into a combustion chamber (11) of a cylinder. A controller (30) controls the degree of opening of a throttle valve (16) for adjusting the amount of air drawn into the combustion chamber (11) and sets the throttle valve (16) to a closed valve state by setting the degree of opening of the throttle valve (16) to a degree of opening that is on the closed valve side of a post-engine start target degree of opening, when the engine is to be started. After it is determined that a start of the engine has been accomplished, the controller (30) opens the throttle valve (16) by gradually increasing the degree of opening of the throttle valve (16) from the degree of opening of the closed valve state to the post-engine start target degree of opening.