【摘要】 针对LNG/柴油双燃料发动机的LNG燃料掺烧问题,以Z6170ZLCZ-19柴油机为原型机,采用增压器后单点进气方式进行改装,对掺烧策略进行试验研究。研究结果表明:在极低负荷区与重载超载区,不宜掺烧LNG燃料;在中低和中高负荷区,可适量掺烧LNG燃料;在中负荷区,双燃料发动机综合性能较好,适宜掺烧LNG燃料。将双燃料发动机工作范围划分为"禁止区"、"控制区"和"健康运行区",并对各个区域设置相应的替代率上限值,可较好地解决LNG的合理掺烧问题。更多还原

【Abstract】 In view of the co-combustion problem about LNG fuel in LNG/diesel dual fuel engine,the Z6170ZLCZ-19 prototype diesel engine was refitted with single-point injection after turbocharger method.And experimental research on co-combustion strategy was carried out. The results show that in the area of extremely low load,heavy load and over load,LNG fuel shouldn’t be co-combusted; in the area of medium-low and medium-high load,LNG fuel can be appropriately co-combusted; in the area of medium load,the overall performance of LNG/diesel dual fuel engine is preferable,and LNG can be co-combusted. By dividing the working range of dual fuel engine into " forbidden region"," control region" and "healthy region" and setting upper limit of replacement rate corresponding to the three regions,the appropriate co-combustion of LNG could be achieved.更多还原