The ceramic substrate support mat of the exhaust gas after-treatment system is one of the important components of the automobile catalytic converter. It is located between the carrier and the shell. It is mainly used to protect the core of the catalytic converter from damage, and it plays the role of fixing the carrier and reducing vibration. And has good air tightness and heat insulation.
The excellent thermal expansion performance of the ceramic substrate support mat solves the significant difference in thermal expansion between the ceramic carrier and the metal shell, protects the ceramic carrier from the impact and vibration of uneven roads, and ensures the performance of automotive catalytic converters.
1. The ceramic substrate support mat has the following excellent performance characteristics.
(1) The fixing function of the support pad of the ceramic substrate protects the ceramic carrier from the shock and vibration of uneven roads.
(2) The ceramic substrate support mat is sealed to prevent exhaust gas leakage.
(3) The thermal insulation performance of the ceramic substrate support mat can prevent the shell from overheating.
(4) The ceramic substrate support mat can sound insulation and reduce noise.
2. The importance of ceramic substrate support mats
If the ceramic substrate support mat does not meet the technical specifications in terms of material, production quality and installation, it will not be able to seal and prevent leakage, and even accidents will occur. For example, the oil pan or valve cover is not easy to be compacted due to the large contact area, resulting in oil leakage. Therefore, the role of ceramic substrate support mats in automobiles cannot be ignored, and attention needs to be paid to the role of ceramic substrate support.
3. How to choose a suitable ceramic substrate support mat?
Step 1: Pad category
Select suitable ceramic substrate support mats according to gasoline or diesel vehicles and different environmental protection standards;
Calculate the amount of overcompression according to different packaging methods of customers
Step 2: Fastening force
Calculate the required confinement force according to the coating weight of the carrier and the acceleration value;
The friction coefficient of the liner and the carrier, the shell, and the pressure required to fasten the carrier are calculated to ensure that the pressure is less than the maximum bearing pressure of the carrier.
Step 3: Product Dimensions
According to the friction coefficient and the pressure provided by the gasket, select the appropriate type of ceramic substrate support mat;
Adjust the area of the liner wrapping the carrier to improve the friction;
According to the package gap and package pressure, select the appropriate basis weight of this type of ceramic support pad.
Step 4: Blowing and Insulation
Consider whether the air intake speed matches the erosion resistance of the ceramic substrate support mat;
Calculate whether the thermal conductivity of the ceramic substrate support mat is appropriate according to the intake air temperature.
Step 5: Product Verification
According to the calculation data and application experience, recommend suitable products for customers.
The above is some knowledge about ceramic substrate support mats. Do you know all about it? If you have more questions, welcome to contact KY-Mat, specializing in the development, production and sale of materials for automotive exhaust aftertreatment regulations.
