A Study on the Correlation of Factors Influencing the Cyclic Variation of Marine Natural Gas Engines

As the most reliable alternative energy source for traditional fuel engines, natural gas has been widely used in inland river marine engines. The engine is faced with problem of increased cyclic variations under condition lean combustion. In this paper, a multi-point injection spark ignition tested different burn degrees to investigate correlation between parameters and variation, including accumulated heat release, combustion phase burning rate. purpose clarify optimized technical route engine. A new method quantify variation proposed. maximum explosion pressure its are as characterize variation. Different then nonlinearly fitted it, R-S value fitting results show that release less than 10%. main factors causing fluctuation delay initial flame propagation, whose over 80% 70%, respectively.