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凡经常乘坐内燃机汽车者都会程度不同地有这样的感觉,即在行驶中的车厢内呆的时间愈长,人愈会有昏昏欲睡的感觉,有的人甚至还伴有恶心感。究其原因,主要还是密闭车厢内空气欠流畅,且供氧不足,废气中CO、CO_2含量过高所致。然而,一旦打开车门,清新空气迎面扑来,原来的不适便会逐渐消失,人的精神也会为之一振。 由此可见,一方面需要阻止发动机废气进入车厢而难以散发;另一方面需要适当地改进车厢结构,使之具有较好的密封性;再一方面就是要源源不断
Those who often take the internal combustion engine car will have different degrees of feeling that the longer the time spent in the driving compartment, the more people will feel drowsy, and some even with nausea. The reason is mainly due to the lack of smooth air in the enclosed compartment, and lack of oxygen, exhaust CO, CO 2 content is too high. However, once the door is opened, the fresh air pounces on its face and the original discomfort will gradually disappear, and the human spirit will be resounding. Thus, on the one hand, it is necessary to prevent the engine exhaust gas from entering the compartment and difficult to emit; on the other hand, the structure of the compartment needs to be properly improved so that it has better sealing performance; on the other hand,