为谋求降低大型直喷式柴油机的排放和燃油耗,正在寻求高压喷射和控制喷油率的新喷油系统。为此,采用直列式喷油泵、共轨式喷油泵和泵喷嘴三种高压喷油系统进行了喷油特性的比较,并进一步探讨了采用各种喷油方式降低排放和燃油耗的可能性。研究结果证实,泵喷嘴的喷油特性对降低排放和燃油耗最有效。 In an effort to reduce emissions and fuel consumption for large direct injection diesel engines, new injection systems are being sought for high pressure injection and control of fuel injection rates. For this reason, the injection characteristics of three high-pressure fuel injection systems with inline injection pump, common rail injection pump and pump nozzle were compared, and the possibility of using various fuel injection methods to reduce emissions and fuel consumption was further discussed. The results confirm that the injection characteristics of the pump nozzle are most effective in reducing emissions and fuel consumption.