Abstract: In response to the failure of rubber pads and delamination of rubber structures observed in road reinforcement reliability tests for a newly developed new energy heavy-duty truck powertrain mounting system, this study conducts an optimized design of the mounting system. By identifying fault locations and analyzing failure patterns, we investigated both structural characteristics of the powertrain mounting system and performance parameters of the mounting rubber pads. Based on these findings, we implemented optimization designs for both the mounting system structure and rubber pad performance. Following comprehensive road reliability testing, a feasible mounting system solution is finalized. This research provides valuable reference for the design and application of powertrain mounting systems in new energy vehicles.

Key words: powertrain; mounting rubber pads; mounting system; failure analysis; optimization design

摘要： 针对某新开发的新能源重卡动力总成悬置系统在道路强化可靠性试验中出现悬置橡胶 垫磨损及橡胶组织脱落的故障现象，对动力总成悬置系统进行优化设计。文章主要通过悬置 橡胶垫故障位置的确定及失效现象的研究，从动力总成悬置系统结构和悬置橡胶垫性能两方 面进行失效原因分析；并根据失效原因分析完成了悬置系统结构和悬置橡胶垫性能的优化设 计。经过道路可靠性试验后，最终确定悬置系统的可行性方案，为新能源汽车动力总成悬置 系统设计和应用提供了重要的参考价值。

关键词: 动力总成；悬置橡胶垫；悬置系统；失效分析；优化设计