一、前言关于柴油机的排气,一般地讲,还没有足够的认识。因为只凭人们感觉到的因素就较多。譬如,见到排气冒烟就认为 CO 的含量是很多的,可是当闻到特别的臭味时,是否 HC 的含量也很多呢?象具有这样想法的人是非常多的。另一方面与汽油机相比较,柴油机排出的有害成分要少得多,因而直到目前,在内燃机工作者中,还有人认为,这种研究没有大力进行的必要。实际上,从大气污染方面考虑,限制柴油机的使用程度是很微小的。可是,目前汽油 First, the foreword On the exhaust of diesel engines, in general, there is not enough understanding. Because only people feel more of the factors. For example, to see the exhaust smoke is that the content of CO is very much, but when the smell of special smell, whether the content of HC is also very much? As with such a person is very large. On the other hand, compared with gasoline engines, diesel engines emit much less harmful components. Therefore, among the internal combustion engine workers, up to now, some people think that such studies have not been vigorously carried out. In fact, from the air pollution point of view, limiting the extent of the use of diesel engines is very small. However, the current gasoline