阐述了汽油机冷启动过程中碳氢化合物排放较高的原因，以及在降低碳氢化合物排放的问题上主要采取的措施。
The paper describes the reasons of higher emission of hydrocarbon in the process of gasoline engine cold start. It also discusses the measures adopted mainly in reducing emission of hydrocarbon.
发动机为四冲程空冷汽油机，靠反弹式起动器启动。
The engine is four- stroke, air-cooled gasoline engine which is started by rebound starter and it can transmit smoothly without energy loss.
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