Analysis and Study on the Poor Fusion of Water Jacket Core Chaplet in Cast Iron Cylinder Block

Author of the article:ZHANG Tinglei1 , LU Zhiyuan1 , Bai Kui1 , ZHAO Naibo1 , YUAN Shuang1 , SHEN Yuan1 , WANG Ruiping1,2

Author's Workplace：1. Ningbo Geely Royal Engine Components Co., Ltd., Ningbo 315336, China; 2. Zhejiang Geely Powertrain Co., Ltd., Ningbo 315800, China

Key Words：cylinder leakage; chaplet; poor fusion; chaplet pit

Abstract：Aimed at the problem of water leakage caused by the improper fusion of core support on the outer wall of the water jacket of an engine cast iron cylinder block, the causes of the improper fusion of core support were analyzed, and an optimization scheme to improve the fusion effect of core support was put forward. The results show that the melting effect of the core brace is directly related to the structure size, casting temperature and casting time of the core brace socket. By controlling the pouring temperature and time, the structure of the core support socket seat is optimized to ensure the full fusion of the cylinder water jacket core support and liquid iron, which completely solves the leakage problem of the engine water jacket caused by the bad fusion of the core support, and improves the reliability and quality of the engine.