Cylinder liners operate permanently under high-temperature conditions generated by fuel combustion. Superior heat dissipation is critical for stabilizing their structural integrity and enabling efficient engine operation. Heat dissipation performance directly governs cylinder temperature balance, component wear rate and overall operational safety of the engine. Insufficient heat dissipation tends to trigger various faults, severely shortening engine service life and compromising operational reliability.

Effective heat dissipation prevents thermal deformation and ensures sealing performance as well as dimensional precision. The in-cylinder temperature can reach hundreds of degrees Celsius during fuel combustion. Poor heat removal from cylinder liners leads to excessive local temperature rise and uneven thermal expansion of materials, resulting in liner deformation or cracking and impaired sealing fit with pistons and cylinder heads. Failed sealing causes combustion gas leakage, which not only cuts down engine power output but also accelerates component wear to create a vicious cycle.

Reduce wear and corrosion to extend component service life. High temperatures accelerate lubricant deterioration and weaken the adhesion capacity of oil films, aggravating frictional loss between cylinder liners, pistons and piston rings. Meanwhile, elevated temperatures intensify corrosive attack from combustion gas and coolant, triggering surface damages such as rust and pitting on liners. Effective heat dissipation maintains the cylinder block within a rational temperature range, preserves lubrication performance, lowers the activity of corrosive media and mitigates wear & corrosion risks.