Analysis of cavitation in cylinder liner of an engine and its improvement
ZHENG Haopeng
ZHANG Guangfeng
ZHANG Cuiyun
ZHANG Zhensheng
ZHANG Xinyue
WANG Ruili
Abstract：To address the cavitation failure of cylinder liners occurring during the endurance test of a new-type engine,the causes potentially leading to cylinder liner cavitation are analyzed,including cylinder liner stiffness,engine torsional vibration and other related factors,and corresponding improvement measures are proposed.Subsequently,the improved cylinder liners are assembled on the engine for a 500 h endurance test.The results show that insufficient cylinder liner stiffness and excessive overall engine vibration are the primary factors causing cylinder liner cavitation,and the coupling effect between the two further accelerates the cavitation process.Increasing the cylinder wall thickness,adopting rolling process on the outer wall and shoulder surface of the cylinder liner,and adjusting the position of cylinder gaskets can effectively improve the cylinder liner stiffness.Optimizing the flywheel moment of inertia can eliminate the main vibration excitation source of the engine and reduce engine vibration.After the engine endurance test,the outer walls of the cylinder liners remain smooth and no abnormal wear is found on the inner walls,indicating that the cylinder liner cavitation failure has been completely resolved.
Keywords：diesel engine designcylinder liner cavitationstiffness analysisrolling technologyengine vibrationstructure improvement
Publication Date：2026-02-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 99-104,111 )