Fuel injection control method for a direct injection spark ignition internal combustion engine

A method of controlling fuel injection in a direct injection spark ignition internal combustion engine, wherein the direct injection spark ignition internal combustion engine includes:

• a fuel injector that faces a combustion chamber and injects fuel such that the injected fuel rides on an intake air flow generated in the combustion chamber;
• and a fuel injection control device that controls such that the fuel injector performs a plurality of fuel injections to inject a necessary amount of fuel during an intake stroke, or from an intake stroke to a first half of a compression stroke, when homogeneous combustion is to be performed, the fuel injection control method comprising:
• setting an injection prohibition period, in which injection of the fuel is prohibited, to a middle of the intake stroke, wherein the injection prohibition period is reduced as a speed of the internal combustion engine increases.

A method of controlling fuel injection in a direct injection spark ignition internal combustion engine, wherein the direct injection spark ignition internal combustion engine includes:

• a fuel injector that faces a combustion chamber and injects fuel such that the injected fuel rides on an intake air flow generated in the combustion chamber;
• and a fuel injection control device that controls such that the fuel injector performs a plurality of fuel injections to inject a necessary amount of fuel during an intake stroke, or from an intake stroke to a first half of a compression stroke, when homogeneous combustion is to be performed, the fuel injection control method comprising:
• setting an injection prohibition period, in which injection of the fuel is prohibited, to a middle of the intake stroke, wherein the injection prohibition period is reduced as a speed of the internal combustion engine increases.