Patent ID: 7707988

Claim:
An engine comprising: an in-cylinder injector injecting fuel into a cylinder; a port injector injecting fuel into an intake manifold; a supercharger; a valve-opening-characteristic changing mechanism changing at least one of lift and opening duration of an intake valve; and a fuel injection control unit increasing the ratio of fuel injection by the in-cylinder injector as a supercharge pressure becomes higher, wherein until the supercharge pressure reaches a predetermined pressure, the fuel injection control unit increases the ratio of fuel injected by said in-cylinder injector according to the magnitude of the supercharge pressure, wherein when the supercharge pressure exceeds said predetermined pressure, said fuel injection control unit fixes the ratio of fuel injected by said in-cylinder injector, and wherein the predetermined supercharge pressure is a supercharge pressure from which a tumble ratio that allows maintaining lean burn is obtained when the ratio of fuel is fixed.