Abstract:For the problem of B10 reliable life calculation of mechanical components of vehicle engine in the development stage, the characteristics of mechanical components of vehicle engine and the existing life modeling methods are analyzed. Based on the stress-strength interference theory, the failure behavior description method for mechanical components of vehicle engine is studied. With the road haul as the life parameter, the model of B10 reliable life of mechanical components of vehicle

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... gine is derived, and the models of reliability, failure rate and mean kilometer to failure(MKTF) and the cumulative distribution function and probability density function of life, are also developed, respectively. According to the operating profile of vehicle engine and based on the parameters of mechanical components including stress, strength, and so on, the B10 reliable life of mechanical components of vehicle engine can be calculated with the models proposed, and the rules that the reliability and failure rate changes, the life probabilistic characteristics and the MKTF of mechanical components of vehicle engine can be determined, too. The method developed is helpful for directing the design, test, operation and maintenance of mechanical components of vehicle engine. Key words:vehicle engine;mechanical components;B10 reliable life;mean kilometer to failure(MKTF);reliability;failure rate 0 前言 * B10 可靠寿命是指可靠度大于 0.9(即失效概率 小于 0.1)时所对应的寿命,是车用发动机及其机械 * 国家自然科学基金资助项目(51375465,50905007)。20131205 收到初 稿,20140530 收到修改稿