| 摘要 |
<p>PURPOSE:To enable lean burn in an exhaust gas contained condition to be conducted, and improve fuel consumption by changing an air fuel ratio of air- fuel mixture supplied to one divided combustion chamber though air-fuel mixture of a theoretical air fuel ratio is supplied constantly to the other divided combustion chamber. CONSTITUTION:At least in one of cylinder heads and pistons, partition walls 14 are formed throughout respective central positions where respective two air intake valves 11A and 11B and air exhaust valves 12A and 12B, so that a combustion chamber is divided into two parts. Air fuel mixture of a theoretical air fuel ratio is supplied to one divided combustion chamber 5A, and exhaust gas contained air-fuel mixture is supplied to the other divided combustion chamber 5B. The air fuel ratio of this exhaust gas contained air-fuel mixture is set to be changed according to an engine load. Thereby, besides making a driving feeling excellent by operating the whole cylinders, fuel consumption can be also reduced by enabling lean burn.</p> |
