ガソリンエンジン技術の琭状と今後の動向

摘要

1980年代から2000年にかけての20年間で，世界の自rn動車の販売台数は年間4000万台から6400万台に増加しrn（図1），保有台数は4億台から8億台近くまで増加してrnいる．2010年には10億の大台にのると予測されており，rnその後も増え続けることが予想される．%It is important for gasoline engines to improve fuel consumption and to have the capability in handling the multi-fuel, as to one of the solutions for the exhaustion of the petroleum resources, the greenhouse effect by carbon dioxides and pollutant emissions. To improve fuel consumption, the following technologies are desired to realize: decreasing of the pumping loss, increasing of the compression ratio, increasing the degree of constant volume combustion phase and introducing the direct injection combustion system. To realize the engines using the multi-fuel, the optimization of the fuel properties and the evolution of various engine technologies are needed.