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Use Of Cylinder liners In IC Engines

 



Inside the cylinder, the piston constantly moving up and down which will cause wear of the cylinder. When the cylinder diameter is increased beyond the certain limit, we may have to discard the entire cylinder block which is costly. To avoid earlier cylinder wear, a separate liner which is in the form of sleeve is inserted into the cylinder bore. Here, the wear will take place in the liner only which can be replaced easily when worn out. There are two types of liners :

     * Wet liner : 

         The liners are surrounded by cooling water. It provides wear resisting surface for the piston to  reciprocate . It also acts as a seal for the water jacket.

     * Dry liner :

         Dry liners have metal-to-metal contact with the cylinder block. They are not directly in touch  with cooling water. 

        Liner material should withstand abrasive wear and corrosive wear. Chromium plated mild steel  tubes are used as liners. 

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