Optimal Design of Engine Variable Stretching for Valve Stem of 157FMI
When designing motorcycle engine, engine cylinder head abnormal noise is common, and difficult to eliminate due to thermal expansion and contraction of the aluminum alloy cylinder head. In this study, on the basis of dynamic change with the performance of 157FMI engine in hot and cold, the reasons for engine cylinder head abnormal noise are analysed, and valve plunger with variable length is applied to minimize the valve clearance, and to make the valve clearance of engine in cold and hot zero, and thus the noise problem of cylinder head with 157FMI engine in hot is completely eliminated.
Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding
C. D. He and P. X. Yang, "Optimal Design of Engine Variable Stretching for Valve Stem of 157FMI", Applied Mechanics and Materials, Vols. 34-35, pp. 1834-1839, 2010