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柴油机在冷态起动时,气缸内燃油最初发火的可能性取决于压缩冲程终了时的空气温度和压力(更确切地讲,就是取决于空气密度)。冷态起动时,往往由于压缩过程条件的特殊性,而使上述参数不能达到必要的程度,从而发动机就起动不成。起动时气缸壁的温度与环境空气温度相同,因此在整个压缩过程的时间内,散热只能是
The possibility of initial ignition of the fuel in the cylinder when the diesel engine is started cold is dependent on the air temperature and pressure at the end of the compression stroke (more precisely on the air density). Cold start, often due to the special conditions of the compression process, leaving the above parameters can not reach the necessary level, so the engine can not start. Starting cylinder wall temperature and ambient air temperature is the same, so in the entire compression process, the heat can only be