引入一种基于自然选择和自然遗传学机理的全局搜索算法———遗传算法 ,并对基于遗传算法的优化过程进行了全面和简要的说明 ,同时根据内燃机凸轮优化设计的特点和难点 ,提出了基于遗传算法的凸轮优化设计方法 ,对遗传算法用于内燃机中的可能性进行了研究 .数值计算实例表明 :遗传算法用于内燃机的凸轮优化设计可获得比较满意的参数优化设计结果 ;与传统的优化方法相比 ,遗传算法具有一定的优越性 This paper introduces a global search algorithm based on natural selection and natural genetics --- genetic algorithm, and gives a comprehensive and brief description of the optimization process based on genetic algorithm. At the same time, according to the characteristics and difficulties of CAM optimization design, Based on the genetic algorithm optimized cam design method, the possibility of genetic algorithm used in internal combustion engine is studied.The numerical examples show that genetic algorithm can be used to optimize the cam design of internal combustion engine to get more satisfactory results of parameter optimization design. Compared with the traditional Compared with the optimization method, genetic algorithm has some advantages