Fuel supply amount controller for internal combustion engine

摘要

A pump control means controls a fuel pump so that fuel pressure supplied into the internal combustion engine becomes lower than a predetermined fuel pressure regulated by a fuel pressure regulator when the operating state of the internal combustion engine is within a predetermined operating state. Thus, the fuel pressure has already been controlled low while the engine state is within the predetermined operating state, so that the fuel leak from the injector during an engine stop is suppressed, thereby reducing an exhaust of deleterious gas when the engine starts again. Further, since the fuel pressure is decreased while the engine works, electric power is not wasted for decreasing the fuel pressure.