| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 96 === In this research, the hydrogen and nitrogen were mixed to hydrogen-rich gas. The 4-stroke carburetor motorcycle engine was used to evaluate the effect of hydrogen-rich gas on the performance and exhaust emissions. The effect of intake-gas positions, different hydrogen-rich gas volume ratio(100-30%), hydrogen-rich gas flow rate(14-35L/min) and speed (40、60、80km/hr) were investigated
The results of this research showed that:
Hydrogen-rich gas could make engine with higher performance. When speed at 80km/hr, hydrogen-rich gas volume ratio70% and flow rate 28L/min, it increased 26% of brake power. If raised hydrogen content, the mix-gas concentration would be over and power reduced. The hydrogen-rich gas had better performance than pure hydrogen gas. When hydrogen-rich rate gas reduced, the CO and HC engine exhaust emissions were decreased. When hydrogen-rich gas is at low ratio and low flow ratio, it has the 7% CO emissions improved. The increasing of hydrogen content on mix-gas will make engine with rich-gasoline combustion, then the engine combustion temperature will low and with incompletion combustion. So NOX and CO2 exhaust emissions concentration will get lower. When motorcycle with high ratio and high flow rate hydrogen-rich gas at 40km/hr, 80km/hr, NOX have the improvement of 92% exhaust emissions.
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