刘康，江楠，辛强之，陆辰，王志明，穆振仟   

    摘要：本文通过对一台进气歧管处喷射天然气的柴油引燃发动机缸内最大燃烧压力的试验研究，获得了不同循环进气量下双燃料发动机的最大燃烧压力循环变动率的变化情况，同时与纯柴油模式下的最大燃烧压力循环变动率进行了比较，分析了双燃料发动机最大燃烧循环变动产生的原因，对今后试验具有一定的指导性作用。

    关键字：双燃料发动机；替代率；循环变动

    Abstract：This paper presents a research about the maximum combustion pressure of the engine that injects natural gas in the intake manifold. We obtain the cyclical variation rate of the maximum combustion pressure of the dual fuel engine under different circulating air inflow through this research. At the same time, we compare it with the pure diesel combustion mode and analyze the cause of maximum combustion cyclical variations. This research may provide references for further tests.

    Key Words：Dual-Fuel Engine；Substitution Rate；Cyclical Variation