本文从未燃hc和CO在发动机内的形成机理入手分析了影响汽油机怠速排放污染物的主要因素。

Analyzes the main factors affecting the toxic emissions from gasoline engine when it is at idle speed on the basis of forming mechanism of HC and CO in the engine.

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通过试验找出了诸因素对怠速排放污染物浓度的影响规律，如混合气质量，点火，发动机转速，冷却水温度及燃烧室表面积炭等。

These factors are mixture concentration, ignition advance Angle, engine speed, temperature of cooling water and carbon deposit on the SUrfaces of the combustion chamber, etc.

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怠速法及双怠速法都是在怠速工况下检测待检汽车的排放污染物的容积排放浓度。

Under idle speed mode although emission volume consistency of pollutant is more bigger than other mode, the proportion of idle speed emission of the automobile isn't much.

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