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燃料在气缸内完全,彻底地烧掉,排出的废气几乎是无色透明的。但往往有些柴油机出现冒烟现象。正常时,进入气缸的是柴油、空气和微量的机油;反常时,可能有水同时进入。燃烧条件不同,燃烧后的生成物及废气所呈现的颜色也不同。
The fuel is completely and thoroughly burned in the cylinder and the exhaust gas is almost colorless and transparent. However, some diesel engines often smoke. Normally, there is diesel, air, and trace amounts of oil entering the cylinder; water may enter while abnormal. Different combustion conditions, the combustion of the resulting products and exhaust colors presented by the different.