The influence of the combustion system parameters on the combustion process of the turbocharged diesel / CNG dual fuel engine with intercooler has been investigated, the combustion system parameters include CNG ratio, the pilot fuel injection time, the air temperature after the intercooler and so on. 对天然气替代率、引燃柴油喷油时刻和中冷后进气温度等燃烧系统参数对增压中冷柴油天然气双燃料发动机燃烧特性的影响进行了实验研究。