对有摩擦时Diesel循环进行了有限时间热力学分析 .导出功率和压缩比、效率和压缩比的新关系式 ,进而得到功率效率关系 ,并进行了计算和讨论 ,给出一些有益的结论 A finite-time thermodynamic analysis of the Diesel cycle with friction was conducted. A new relationship between power and compression ratio, efficiency and compression ratio was derived, and then the power efficiency relationship was obtained. The calculation and discussion were given and some useful conclusions were drawn