I don't know what a car cylinder mattress is for
The main role of the automotive cylinder mattress is to ensure a good seal between the cylinder block and the cylinder head, to prevent cylinder leakage, water jacket water leakage and oil leakage . The cylinder mattress is located between the cylinder head and the cylinder block to fill the microscopic pores between the two to ensure good sealing at the joint surface, and then ensure the sealing of the combustion chamber to prevent the leakage of high-pressure gas, lubricating oil and cooling water from between them .
The specific functions of the cylinder mattress include:
Sealing function : prevent high pressure gas, lubricating oil and cooling water from the gap between the cylinder block and the cylinder head .
high temperature and corrosion resistance : because the temperature in the cylinder when the engine is working is very high, the oil and coolant have a certain corrosion, so the cylinder mattress needs to have heat and corrosion resistance .
compensation deformation : the cylinder mattress needs to have a certain degree of elasticity to compensate for the roughness and unevenness of the surface of the cylinder block and the cylinder head, as well as the deformation of the cylinder head when the engine is working .
Types of cylinder mattresses include:
Metallic asbestos pad : asbestos as the matrix, outer copper or steel skin, with good elasticity and heat resistance, but because of the carcinogenic effect of asbestos on the human body, in developed countries has been gradually eliminated .
The main role of the automotive cylinder mattress is to ensure a good seal between the cylinder block and the cylinder head, to prevent cylinder leakage, water jacket water leakage and oil leakage . Specifically, the cylinder mattress fills the microscopic pores between the cylinder block and the cylinder head to ensure good sealing at the joint surface, thus ensuring the sealing of the combustion chamber and preventing cylinder air leakage and water jacket leakage .
Type and material of cylinder mattress
Cylinder mattresses can be divided into several types according to different materials:
Metallic asbestos pad : asbestos as the matrix, outside the copper or steel skin, sandwiched with metal wire or metal filings, has good elasticity and heat resistance, but because of the carcinogenic effect of asbestos on the human body, has been gradually eliminated .
metal composite pad : pressed from mild steel or copper sheet, commonly used in high-strength engines .
all metal pad : made of a single piece of smooth steel plate, there is elastic relief in the seal, relying on the elastic relief and heat resistant sealant to seal, with high strength and good sealing effect .
Cylinder mattress working environment and damage consequences
Cylinder mattresses work in high temperature and high pressure environments and are susceptible to corrosion by high temperature gases and coolants, especially around the cylinder mouth roll. If the cylinder mattress is damaged, it will lead to the deterioration of the working condition of the engine, and even cause damage to related parts .
Therefore, regular inspection and replacement of damaged cylinder mattresses is of great significance to ensure the normal operation of the engine and extend its service life .
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