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.
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。
Analyzed the factors affecting the diesel engine cold start, put forward the measures to improve the cold start performance.
分析了柴油机冷启动过程的主要影响因素，并提出了提高柴油机冷启动性能的措施。
Analyzed the factors affecting the diesel engine cold start, put forward the measures to improve the cold start performance.
分析了柴油机冷启动过程的主要影响因素，并提出了提高柴油机冷启动性能的措施。
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