Study on combustion characteristics under methanol gasoline emission optimization based on orthogonal matrix analysis

This study utilizes the orthogonal matrix analysis method to identify the lower levels of both conventional and unconventional emissions in engines powered by methanol gasoline, with the aim of optimizing gas emissions. Through the utilization of ANOVA, we were able to determine the key elements that impact the emissions of methanol gasoline from engines. Additionally, we validated the correctness of the experiment by employing the signal-to-noise ratio. The analysis focused on the combustion parameters of an engine that burns methanol fuel while maintaining low overall emissions. The accuracy of the numerical simulation was confirmed through the utilization of GT-power for numerical simulation and subsequent experimental validation. The findings suggest that when the engine operates at a load of 1200 rpm and 6 N m while consuming M85, there is a reduction in both conventional and unconventional emissions. M85 has a maximum cylinder pressure that is 18.7% more than pure gasoline. Conversely, pure gasoline demonstrates a power output that is 24.7% higher than M85. Additionally, M85 has a BSFC_e that is 22.71% higher than gasoline. The addition of a methanol-gasoline mixture can effectively reduce the engine's exhaust temperature.