The functions of the cylinder liner are:
1. With the cylinder head, piston together constitute the cylinder workspace.
2. The cylinder liner of the cylindrical piston diesel engine to bear the piston side thrust, become the piston reciprocating motion of the guide.
3. The piston assembly and its own heat transfer to the cooling water, so that the working temperature is appropriate.
4. The cylinder liner of two-stroke diesel engine is arranged with ports, which are opened and closed by the piston to realize gas distribution.