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东风5型机车用8240ZJ型柴油机提升功率的主要制约因素之一，是柴油机燃烧室零件的热负荷。本文对该机提升功率后气缸盖的热负荷状况进行了预测和使用寿命评估，对其主要可李功的性能参数和气缸盖材料的物理性能参数作了灵敏度分析，并提出提升功率后可能出现的问题及解决措放，从而为8240ZJ型柴油机的进一步强化提供了热负荷分析的依据。
Dongfeng 5 locomotive with 8240ZJ type diesel engine to enhance the power of one of the main constraints, is the thermal load on the diesel engine combustion chamber components. In this paper, the thermal load status of the cylinder head after the power is raised is estimated and its service life is evaluated. The sensitivity analysis of the performance parameters of the main Li Gong and the physical performance parameters of the cylinder head material is proposed, and the possible increase of the power may occur after the power is raised Of the problem and solution measures to provide the basis for further analysis of thermal load for the 8240ZJ-type diesel engine to further strengthen.