本文以某型发动机为实例,利用经过生产工艺定型后积累的发动机地面静止点火试验结果,运用失效树分析法和数字仿真法求底事件的可靠度方法,对交付批产品在使用温度范围内的性能可靠性进行了预估,并定量地给出了性能可靠性指标,找出了影响系统性能可靠性的主要因素,可供使用与设计单位如何根据需要与可能进行产品可靠性指标分配时参考. In this paper, a certain type of engine is taken as an example. Based on the static ground ignition test results accumulated by the production process after modeling, the method of failure tree analysis and digital simulation are used to calculate the reliability of the bottom event. Performance reliability is estimated and quantitatively given the performance reliability index to identify the main factors that affect the reliability of system performance, availability and design units as needed and possible product reliability indicators when the reference .