Lightweight improvement of EGR bracket for heavy-duty diesel engine
XIE Wei-hua1, HONG Yang1, ZHAO Guo-jiang2
（1.School of Automotive and Information Engineering, Taizhou Vocational College of Science & Technology,
Taizhou 318020, China; 2.Zhe Jiang Bondlye Environmental Technology Co.,Ltd.,Taizhou 317000, China）
Abstract: Aiming at the problem of low overall mode and large local stress in a heavy-duty diesel engine, the finite element analysis and the lightweight improvement was taken. The mesh of EGR cooler, bracket and clamp were taken based on ANSA. The finite element analysis was carried out to study the first five overall modes of EGR and local stress under high acceleration based on ABAQUS. The lightweight improvement was presented that remove redundant part, adjust the position of reinforcing ribs, increase bolt hole boss, thin bracket side plate and thicken bracket base plate based on the analysis results and design requirements. The finite element analysis and tests were taken to study the lightweight improvement effort. The results indicate that the lightweight improvement have obvious effect, compared with the original scheme, the quality have a 35.5% drop, the overall mode have a 43% increase and the max local stress have a 62% drop. The results indicate that the lightweight improvement are effective based on finite element analysis, it can provide reference for the research of automobile parts lightweight.
Key words: heavy-duty diesel engine; exhaust gas recycling（EGR）bracket; lightweight improvement; finite element analysis