4JA1 Diesel Engine Cylinder Liner 8-97176-693-0 8-94462-130-0 8-94110-144-0 For ISUZU

The inner surface of the cylinder sleeve is directly affected by the high-temperature and high-pressure gas, and always has high-speed sliding friction with the piston ring and piston skirt. The surface comes into contact with cooling water, causing severe thermal stress under large temperature differences and being corroded by cooling water. The lateral thrust of the piston on the cylinder liner not only intensifies its internal surface friction, but also causes it to bend. When the lateral thrust changes direction, the piston also impacts the cylinder liner. In addition, it is also subjected to significant installation preload.

The gas pressure causes tangential tensile stress and radial compressive stress on the cylinder wall, and the maximum stress on the inner surface is high-frequency pulsating stress.

Due to the significant thermal stress generated by the temperature difference between the inner and outer walls of the cylinder, compressive stress is generally generated on the inner surface, while tensile stress is present on the cooling surface. But at extremely high temperatures, the metal near the inner surface undergoes creep plastic deformation, and after cooling, residual tensile stress forms on the inner surface. This low-frequency stress caused by changes in starting and stopping can cause material fatigue.

The cylinder liner should have sufficient strength, stiffness, and heat resistance, as well as good wear resistance. There should be good lubrication and cooling during work.