在一台配有双燃料化油器的单缸点燃式发动机上进行了不同甲醇、汽油混合比的燃烧特性研究。实验表明，当燃料中的甲醇比例增加后，尤其是在稀混合气条件下，发动机的着火延迟期缩短，循环变动率明显减少，发动机的性能提高。当甲醇比例超过５０％后，燃烧特性与纯甲醇相近。 In a single-cylinder ignition engine equipped with dual-fuel carburetor combustion characteristics of different methanol and gasoline mixture ratio were studied. Experiments show that when the proportion of methanol in the fuel increases, especially in the lean mixture conditions, the ignition delay period of the engine is shortened, the cyclic variation rate is obviously reduced, and the performance of the engine is improved. When the proportion of methanol exceeds 50%, the combustion characteristics are similar to that of pure methanol.