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BMW和PSA公司为降低CO_2排放合作开发了一种小型汽油机系列(图1),并首次在该等级排量的汽油机上应用了全可变气门机构(配气相位和气门升程调节)以及采用双涡道增压器增压与缸内直接喷射相结合,同时应用了体积流量可调的机油泵和可脱开的机械传动冷却水泵,并不断地降低摩擦功率,使得所有机型的扭矩特性曲线明显丰满,燃油耗显著降低。
BMW and PSA have developed a compact gasoline engine series (Figure 1) to reduce CO 2 emissions. For the first time, all-variable valve mechanisms (gas phase and valve lift adjustment) have been applied to this class of displacement gasoline engine, The combination of dual-scroll turbocharger boost and direct in-cylinder injection combined with an adjustable-volume oil pump and a disconnectable mechanical-drive cooling water pump continue to reduce the frictional power and torque characteristics of all models Obvious plump curve, fuel consumption decreased significantly.