车用国六柴油机EGR旁通阀分析与研究  

Fracture Failure Analysis and Structural Optimization Study of EGR Bypass Valve for a ChinaⅥDiesel Engine

作　　者：凡次永 刘川元 宁波 FAN Ciyong;LIU Chuanyuan;NING Bo(Kunming University of Science and Technology,Kunming 650500,Yunnan China;Kunming Yunnei Power Co.,Ltd.,Kunming 650200,Yunnan China;Cermak E-Automotive Tech(Horgos)Co.,Ltd.,Yili 835000,Xinjiang China;JFMI Inspection&Testing Technology Co.,Ltd.,Jinan 250399,Shandong China)

机构地区：[1]昆明理工大学,云南昆明650500 [2]昆明云内动力股份有限公司,云南昆明650200 [3]霍尔果斯国盛车马赫汽车科技有限公司,新疆伊犁835000 [4]济南铸锻所检验检测科技有限公司,山东济南250399

出　　处：《锻压装备与制造技术》2023年第1期94-101,共8页China Metalforming Equipment & Manufacturing Technology

基　　金：云南省重点项目(2022105A)。

摘　　要：针对某1.9L排量车用国六柴油发动机EGR旁通阀片断裂问题,从旁通阀结构设计分析、旁通阀片强度校核、旁通阀受力测试分析方面进行原因排查,确定EGR旁通阀片受发动机高频排气脉冲正反向压差作用,致使旁通阀片异常动作而发生疲劳断裂。根据旁通阀受力状态及工作环境对旁通阀执行机构初始弹簧力和真空执行器膜片直径进行计算和优化调整,对优化调整后的方案开展试验验证,根本上解决阀片断裂问题。For the fracture problem of EGR bypass valve plate of a 1.9L ChinaⅥemission standard vehicle diesel engine,this paper investigated the causes from bypass valve structure design analysis,bypass valve plate strength check,and bypass valve force analysis,and determined that the EGR bypass valve plate was subject to the positive and negative pressure of engine high-frequency exhaust pulse,which caused the abnormal action of the bypass valve plate and fatigue fracture.According to the force analysis and working environment of the bypass valve,the spring force of the bypass valve actuator and the specifications of the vacuum actuator diaphragm are calculated and optimized,and the optimized scheme is tested and verified to fundamentally solve the valve fracture problem.

关 键 词：EGR 旁通阀 真空执行器 弹簧力 

分 类 号：TH137.5[机械工程—机械制造及自动化]