Service HotlineThose who are familiar with ceramic cylinder liners should know that ceramic cylinder liners are divided into two types: dry ceramic cylinder liners and wet ceramic cylinder liners. We should selectively purchase according to our own actual situation.
Let's first introduce the dry ceramic cylinder liner. The dry ceramic cylinder liner does not directly contact cold water, has a thin wall, and fits snugly with the cylinder body bearing hole, making it less prone to water leakage and wet ceramic cylinder liners; Next, let's learn about wet ceramic cylinder liners. Wet ceramic cylinder liners come into direct contact with cold water, have thick walls, good heat dissipation effects, and are prone to air and cold leaks.
Ceramic cylinder liners are divided into two categories: dry ceramic cylinder liners and wet ceramic cylinder liners. Dry ceramic cylinder liner has a thin thickness, simple structure, and easy processing. Wet ceramic cylinder liners come into direct contact with cooling water, which is beneficial for engine cooling and the miniaturization and lightweighting of the engine.
Ceramic cylinder liner is the abbreviation for engine gas ceramic cylinder liner, which is embedded in the cylinder of the cylinder block and forms the combustion chamber together with the piston and cylinder head. The gas ceramic cylinder liner that does not come into contact with cooling water on the back is called a dry ceramic cylinder liner, while the gas ceramic cylinder liner that comes into contact with cooling water on the back is a wet ceramic cylinder liner.
Ceramic cylinder liners should have sufficient strength, rigidity, and heat resistance, as well as good wear resistance. Good lubrication and cooling should be provided during work. The inner surface of the cylinder is prone to wear due to the action of high-temperature and high-pressure gas and contact with the high-speed moving piston. There are different cylinder structure forms and surface treatment methods to improve the wear resistance and prolong the service life of cylinders. There are three types of cylinder structures: ceramic free cylinder liner, dry ceramic cylinder liner, and wet ceramic cylinder liner.
The ceramic cylinder liner free body refers to a body that does not have ceramic cylinder liners embedded, and the cylinder is directly machined on the body. The advantage is that it can shorten the center distance of the cylinder, reducing the size and mass of the body. But the cost is relatively high. Dry ceramic cylinder liner does not come into contact with coolant, with a wall thickness of 2-3mm. The outer surface and the inner surface of the ceramic cylinder liner seat hole must be precision machined to ensure necessary positional accuracy and facilitate disassembly and assembly. The advantages are high body stiffness, small cylinder center distance, light weight, and simple processing technology. The disadvantage is poor heat transfer, uneven temperature distribution, and easy occurrence of local deformation.
The outer wall of the wet ceramic cylinder liner is in direct contact with the coolant, with a wall thickness of 5-8mm. Radial positioning is achieved using upper and lower positioning rings, while axial positioning is achieved by matching the upper flange of the ceramic cylinder liner with the corresponding support surface at the top of the machine body. The advantage of wet ceramic cylinder liner is that there is no sealed water jacket on the body, making it easy to cast, with good heat transfer, uniform temperature distribution, and convenient repair. The ceramic cylinder liner can be replaced without removing the engine from the car. The disadvantage is that the body has poor rigidity and is prone to water leakage.
