非道路国四柴油机后处理系统加速耐久试验设计

李健巍，孙志江，杨起，李嵩，郑碧莹，苏国梁，张希杰，谢成芬

潍柴动力空气净化科技有限公司，山东 潍坊  261000

摘要：为保证在精准考核的前提下缩短非道路国四后处理系统可靠性考核的时间，设计加速耐久试验，将后处理系统的加速耐久试验与整车系统的耐久试验相关联，从热应力疲劳和振动疲劳两方面对非道路后处理系统的可靠性进行加速考核，并以某推土机为例进行试验验证。试验结果表明：设计的试验损伤不低于实际工作全寿命损伤，热疲劳和振动疲劳加速试验可以有效缩短验证时间，提高开发效率。

关键词：非道路国四柴油机；后处理系统；热疲劳；振动疲劳；损伤；耐久

Design of accelerated durability test of aftertreatment system for a non-road CHINA IV diesel engine

LI Jianwei, SUN Zhijiang, YANG Qi, LI Song, ZHENG Biying,

SU Guoliang, ZHANG Xijie, XIE Chengfen

Weichai Power Emission Solutions Technology Co., Ltd., Weifang 261000, China

Abstract: In order to shorten the reliability assessment time of non-road CHINA IV aftertreatment system under the premise of accurate assessment, an accelerated durability test is designed to link the accelerated durability test of the aftertreatment system with the durability test of the entire vehicle system. The reliability test of the non-road aftertreatment system is accelerated from the aspects of thermal stress fatigue and vibration fatigue, and is verified by testing a bulldozer as an example. The experimental results show that the designed test damage is not lower than the actual working life damage. Thermal fatigue and vibration fatigue acceleration tests can effectively shorten the verification time and improve development efficiency.

Keywords: non-road CHINA IV diesel engine; aftertreatment system; thermal fatigue; vibration fatigue; damage; durability