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针对内燃机配气机构工作时的振动、冲击和噪声问题,建立内燃机配气凸轮机构型线的动力学数学模型。对蚁群算法在内燃机配气凸轮机构型线参数优化设计进行详细分析,并对蚁群算法存在的容易陷入局部解问题,将蚁群算法和遗传算法进行有效地结合,使得改进后的蚁群算法能够高效率地对内燃机配气凸轮机构型线参数进行优化设计。运用改进型蚁群算法和Matlab语言,对内燃机配气凸轮机构型线数学模型进行仿真优化计算,与原设计相比,仿真结果表明,丰满系数提高,动态最大正加速度在上升段降低,在下降段增加,动态最大负加速度降低,使得系统动态速度和动态加速度趋于平稳,有效地减少了内燃机配气机构的冲击振动,提高了内燃机的动力性能。
Aiming at the vibration, shock and noise of the internal combustion engine valve train, this paper establishes the dynamic mathematical model of the cam line profile of internal combustion engine. In this paper, the optimization design of the ant colony algorithm in the distribution line profile of internal combustion engine cam is analyzed in detail, and the existence of the ant colony algorithm is easy to fall into the problem of local solution. The ant colony algorithm and the genetic algorithm are effectively combined so that the improved ant colony The algorithm can efficiently optimize the profile parameters of internal combustion engine cam profiles. Compared with the original design, the simulation results show that the fullness coefficient increases and the dynamic maximum positive acceleration decreases at the ascent stage, and decreases at the descending stage. The improved ant colony algorithm and Matlab language are used to simulate and optimize the mathematical model of the profile cam mechanism of the internal combustion engine. The increase of the dynamic range and the decrease of the maximum dynamic negative acceleration make the dynamic speed and dynamic acceleration of the system tend to be stable, effectively reducing the impact vibration of the internal combustion engine valve train and improving the dynamic performance of the internal combustion engine.