目前，国内外汽车使用天然气时，都是将原来的汽油车或柴油车的发动机进行改装，以适应燃烧天然气。按燃烧天然气的特点专门设计、制造的发动机还比较少。
At present, domestic and foreign automobile use of natural gas, is the original gasoline or diesel engine is modified, in order to adapt to the combustion of natural gas. According to the characteristics of combustion of natural gas in specialized design, manufacturing of engine is less.
