The method of adjusting alcohol-based fuel composition to improve the micro combustion of the miniature glow-ignition IC engine was studied experimentally. Combustion diagnosis of a 0.99cc IC engine indicates that when burning methanol-castor oil fuel or ethanol-castor oil fuel, combustion cyclic variation is severe, partial burning and misfiring is frequent, heat-release is slow, and combustion duration is rather long. Based on these two reference fuels, nitromethane and hydrogen peroxide solutions were added respectively for combustion-supporting investigation. It is confirmed that nitromethane can efficiently promote the improvement of combustion while hydrogen peroxide solution fails to show the expected effect. However, the combustion stability is sensitive to the amount of nitromethane added, the best combustion characteristics can be achieved for the methanol-castor oil-nitromethane fuel when the volume fraction of nitromethane is 15 %. On the other hand, combustion of ethanol-castor oil-nitromethane fuel is obviously worse than that of methanol-castor oil-nitromethane fuel, partial burning and misfiring can be diagnosed under all the condition of nitromethane volume fraction. For the glow-ignition micro combustion of the miniature IC engine, the benefits of adding nitromethane into the fuels are mainly embodied in affecting on the ignition stage, which results in a suppression for partial burning and misfiring.

实验研究了调整醇基燃料成分以改善微型辉光点火IC发动机微燃烧的方法。0.99cc内燃机的燃烧诊断表明，燃烧甲醇-蓖麻油燃料或乙醇-蓖麻油燃料时，燃烧循环变化严重，局部燃烧和不点火频繁，放热缓慢，燃烧持续时间较长。基于这两种参考燃料，分别添加了硝基甲烷和过氧化氢溶液进行助燃研究。可以肯定的是，硝基甲烷可以有效地促进燃烧的改善，而过氧化氢溶液则不能显示出预期的效果。但是，燃烧稳定性对硝基甲烷的添加量敏感，当硝基甲烷的体积分数为15％时，甲醇-蓖麻油-硝基甲烷燃料可获得最佳的燃烧特性。另一方面，乙醇-蓖麻油-硝基甲烷燃料的燃烧明显比甲醇-蓖麻油-硝基甲烷燃料的燃烧差，在硝基甲烷体积分数的所有条件下都可以诊断出部分燃烧和不点火。对于微型内燃机的微燃点火，向燃料中添加硝基甲烷的好处主要体现在影响点火阶段，从而抑制了部分燃烧和不点火。乙醇-蓖麻油-硝基甲烷燃料的燃烧明显比甲醇-蓖麻油-硝基甲烷燃料的燃烧差，在硝基甲烷体积分数的所有条件下都可以诊断出部分燃烧和不点火。对于微型内燃机的微燃点火，向燃料中添加硝基甲烷的好处主要体现在影响点火阶段，从而抑制了部分燃烧和不点火。乙醇-蓖麻油-硝基甲烷燃料的燃烧明显比甲醇-蓖麻油-硝基甲烷燃料的燃烧差，在硝基甲烷体积分数的所有条件下都可以诊断出部分燃烧和不点火。对于微型内燃机的微燃点火，向燃料中添加硝基甲烷的好处主要体现在影响点火阶段，从而抑制了部分燃烧和不点火。