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众所周之,发动机工作的可靠性,是其零件可靠性的函数,因此,根据可靠性理论,可以将发动机看成是由一连串元件组合构成的一个系统,也就是说,系统中的任何一个零件发生故障,都会导致整个系统的故障。现在来确定发动机使用期和其组成元件(零件、部件)间的数量关系。此时,假设在发动机大修以前的整个使用期间内,不得更换和拆卸主要零件,并以γ％去估价发动机的使用期。
As a result, the reliability of engine work is a function of the reliability of its parts. Therefore, according to the reliability theory, the engine can be regarded as a system composed of a series of elements, that is, any one of the systems Parts failure, will lead to the failure of the entire system. Now to determine the engine life and its components (parts, components) between the number of relations. At this point, it is assumed that no major parts shall be replaced and disassembled throughout the life of the engine prior to overhauling, and the useful life of the engine shall be estimated as γ%.