Patent ID: 7536994

Claim:
An internal combustion engine comprising: a first injector for injecting fuel into an intake port or a combustion chamber; a second injector for injecting the fuel into the combustion chamber following the injection of the fuel by the first injector; and a spark plug for igniting an air-fuel mixture within the combustion chamber, wherein an air-fuel ratio of the air-fuel mixture produced in the combustion chamber by the injection of the fuel by the first injector is set in a range of 28 to 38, wherein an amount of the fuel injected by the second injector is fixed at a given value, and an amount of the fuel injected by the first injector is changed corresponding to a demanded operating load, and wherein when the demanded operating load is changed, a ratio between an amount of gas residing in a cylinder and an amount of gas newly drawn therein is controlled based on a closing timing of an exhaust value.