|
| Experimental Study on Combustion Characteristics of Methanol-Gasoline Blend Fuel in Intermediate-Scale Internal Combustion Engines |
| DOI：10.13949/j.cnki.nrjgc.XXXX.XX.001 |
| Key Words:medium-scale internal combustion engine methanol gasoline combustion characteristics |
|
| 摘要点击次数: 85 |
| 全文下载次数: 0 |
| Abstract:To investigate the influence of different air-fuel mixture concentrations and methanol-gasoline blending ratios on the combustion characteristics of an intermediate-scale internal combustion engine, a combustion test bench was constructed using the Tuoyang FS-S100AC four-stroke reciprocating piston micro single-cylinder engine as the research object. Parameters such as misfire rate, average peak cylinder pressure, peak cylinder pressure cycle variation, and combustion duration were used to reflect combustion quality. The results showed that: (1) At high speeds, the misfire rate of the intermediate-scale engine was zero; misfire phenomena occurred at lower speeds, and both λ and blending ratio had an impact on the misfire rate. (2) The average peak cylinder pressure decreased with increasing air-fuel mixture concentration, with the maximum value observed at λ=1.2. When λ was constant, there was a trend of higher values at both ends and lower values in the middle, with M100 higher than G100; when the fuel blending ratio and λ were constant, the average peak cylinder pressure increased with increasing speed. (3) When λ and speed were constant, the variation of peak cylinder pressure cycle decreased with decreasing methanol blending ratio, and the higher the air-fuel mixture concentration, the greater the variation of peak cylinder pressure cycle. When the blending ratio and excess air coefficient were constant, the variation of peak cylinder pressure cycle decreased with increasing speed. (4) When λ was constant, the combustion duration of the intermediate-scale engine increased with decreasing methanol blending ratio, and the combustion duration was longest for G100 combustion. The combustion duration of the five fuels decreased with increasing homogenous air-fuel mixture concentration, with the shortest duration observed at λ=0.8. When the fuel and homogenous air-fuel mixture concentration were constant, the combustion duration decreased with increasing speed. |
| 查看/发表评论 下载PDF阅读器 |
|
|
|