Enhancement of Flange Strength in liner

Project Abstract / Summary : An engine is a device which transforms one form of energy into another form. Normally, most of the engines convert thermal energy into mechanical work and therefore it is called as ‘heat engines’.


Heat Engines including internal combustion and external combustion engines burn a fuel to create heat, which then creates motion.In the internal combustion engines to generate the power the fuel has to be burnt in the cylinder, which is compressed by the piston .So to achieve the maximum possible extent of the fuel to burn the Cylinder Liner and the Piston plays crucial role.


The cylinder of an I.C. engine acts as the structural member and retains the working fluid in a closed space with movable piston wall. Then the cylinder undergoes wear due to reciprocating movement of the piston in a cylinder liner.


To prevent wearing of the cylinder, a cylinder liner is used which can be replaced when it worn-out. Cylinder liners are cast centrifugally in the barrels using Iron alloy. Liners used in aluminum cylinder blocks, are made from aluminum alloy.


A trends have generated demands to adequate the liner design by improving its material properties by changing its chemical composition, new materials data or even by introducing more accurate casting manufacturing process. Therefore, there is a clear tendency to development more and more alternative solutions that combine a certain technical high-value added and low cost.



The most important material properties for cylinder liners are the ultimate tensile strength (UTS) and the fatigue tensile strength. Both parameters confer to the cylinder liners, especially for wet top flanged designs, the ability to survive under high mechanical and thermal load conditions even with reduced wall thickness.


Increased engine horse power in recent internal combustion engines have raised the problems of higher cylinder pressures and assembly loads. In engines utilizing cylinder liners, the increased pressures and loads on the liners have imposed excessive stresses on both the liners and the blocks. In such cases in order to insure strength of the liner seat, engine coolant is circulated considerably below the liner flange and bypasses areas having high thermal loads from combustion.


Deep pressure rolling instead of roller burnish of the cylinder liner flange. The deep pressure rolling of the liner flange radius improves the metal fatigue strength by a minimum of 50%. This means that a properly installed liner will last longer since the liner flange will not crack under normal operating conditions.





Keywords- Cylinder Liner, Ultimate Tensile Strength, Fatigue Tensile Strength, Flange Strength, Deep Pressure Rolling

Why did you choose to work on this project topic : Fierce competition in today’s global markets, achieving competitive edge is an essential success factor not only to enlarge business, but also to survive so auto mobile companies increases the IC engine horsepower due to combustion process vibrations will develop .

In this scenario liner will break by this vibrations so to ensure the strength so that liner is able to with standard the load for specific load and our project liner should able to withstand 1,40,000lbs

Project Category : Mechanical / Automobile / Aeronautical
------------------------------------------------------
Institute/College Name: K.L.UNIVERSITY
City: Vijayawada
State: ANDHRAPRADESH
Participating Team From: Final Year