CNG在内燃机上应用的研究现状及发展前景

Research Status and Development Prospect of CNG Application in Internal Combustion Engine

压缩天然气(CNG)的辛烷值比汽油高很多,具有良好的抗爆性能,在点燃式发动机上使用可以提高压缩比。天然气本身就是一种清洁燃料,极易与空气混合形成均匀混合气,在发动机运行范围内基本没有黑烟产生,与传统的压燃式柴油机相比,CNG发动机的颗粒物排放也相对比较低。介绍了CNG的特点和性能优势,具体分析了目前CNG内燃机中存在的问题以及应用前景。

The octane number of compressed natural gas(CNG)is much higher than that of gasoline,and it has good antiknock performance.It can improve the compression ratio when it is used in the spark ignition engine.Natural gas itself is a kind of clean fuel.It is very easy to mix with air to form a uniform mixture.There is basically no black smoke in the operating range of the engine.Compared with the traditional compression ignition diesel engine,the particulate emissions of the CNG engine are relatively considerable.It introduces the characteristics and performance advantages of CNG,and analyzes the existing problems and application prospects of CNG internal combustion engine.