柴油机短时间的开动,也许可以用煤油作燃料。然而,从技术上来讲,如果不对柴油机作重大改进就用煤油来代替柴油是不适宜的。柴油机要求柴油有较好的自燃性(用十六烷值表示),而且必须有足够高的压缩比(一般为12～22)。将煤油直接用于现有的柴油机上,首先碰到的问题是它的粘度过低,燃油系统及调速器不易密封,易漏油;其次,用煤油比用柴油消耗高,而且易使油泵 Short-term diesel engine start, may be able to use kerosene as fuel. Technically, however, it is not appropriate to use kerosene instead of diesel unless it is significantly modified. Diesel diesel fuel requires good self-ignition (cetane number), and must have a high enough compression ratio (usually 12 to 22). The first problem encountered when using kerosene directly on an existing diesel engine is that its viscosity is too low, the fuel system and the governor are not easily sealed, and the oil is easily leaked. Secondly, kerosene consumes more energy than diesel oil, and the oil pump