首先基于CAD中的正时链条系统设计在Enventive中进行再建模,然后通过Enventive对正时链系统凸轮轴相位误差进行公差分析。通过分析正时系统各零部件各相关尺寸对凸轮相位差影响的敏感度与贡献比例,重新调整尺寸链中的重要尺寸公差,达到优化设计的目的。 First, re-modeling was done in Enventive based on the timing chain system design in CAD, and then the tolerance analysis of camshaft phase error of timing chain system was performed by Enventive. By analyzing the sensitivity and contribution ratio of the relative sizes of the various components of the timing system to the cam phase difference, the important dimensional tolerances in the dimension chain are readjusted to achieve the goal of optimal design.