Experimental Investigation, Failure Analysis and Life Extension of Engine Cylinder Liners

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Saeedi, Meysam | 2020

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 53593 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Adib Nazari, Saeed; Karimzadeh, Ardavan
Abstract:
A Cylinder Liner is one of the most important functional parts that gives a wear protective surface of cylinder block for piston and piston rings. Liners are used in automotive, ships, power aircrafts, and power generation units and the most load carrying part in internal combustion engine. Liners are subjected to various stresses during the engine working status. The stresses which act on cylinder liner are stress due to action of gas pressure and heat. Result of that stresses, wear developed inside of liner and internal or external cracking of cylinder liner takes place. In this paper, complete thermo-mechanical analysis of cylinder liner and failure mechanisms detected in alloyed cast iron liners of heavy diesel engines. The most important requirement for the satisfactory service life of the cylinder liners is higher life. Therefore, theses analyses are carried out to investigate the various reasons of failure of liner and methods to overcome failure. At the end, Effect of loss of inner coating on reducing life and Comparison of analytical results with fractography have been shown
Keywords:
Liner ; Crack ; Fatigue ; Thermo-Mechanical Analysis ; Internal Combustion Engines

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