Engine control apparatus

Abstract

The invention comprises at least two independent intake ports 14a, 14b connected to a combustion chamber 15, two intake valves 12a, 12b, and two exhaust valves 13a, 13b. A first fuel injection valve 31a is provided in the first intake port 14a and a second intake control valve 26 is provided for opening and closing the second intake port 14b. When the engine is in the cold condition, the second intake control valve 26 is slightly opened and fuel is injected from the first fuel injection valve 31b. Air-fuel mixture from the first intake port 14a and a smaller amount of fresh air from the second intake port 14b are introduced [into the combustion chamber], and the overall air-fuel ratio inside the combustion chamber is controlled to become slightly lean.

Dependencies are inferred from the claim text.