为提升传统汽油机的节油性能,汽车制造商开发了各种先进的发动机技术,如可变气门、稀薄燃烧、汽油缸内直喷、可变压缩比等技术,其中一些技术已得到了广泛运用。对于汽油机,通过缩小排量转移发动机部分负荷时工况点可以实现巨大节能效果。然而,缩小排量也意味着降低了发动机的动力,为提升缩小排量后的发动机动力性往往采 In order to enhance the fuel-saving performance of conventional gasoline engines, automobile manufacturers have developed various advanced engine technologies such as variable valves, lean-burn, direct injection in gasoline cylinders, and variable compression ratios, some of which have been widely used . For gasoline engines, a tremendous energy saving effect can be achieved by reducing the displacement of engine operating points at partial load. However, the reduction of displacement also means that the engine power is reduced. In order to improve the engine power after reducing the displacement,