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Automotive parts performance testing
2025/06/14
I. Engine Cylinder Seal Test
There are seven factors affecting cylinder sealing, mainly cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder head gasket damage, and valve clearance.
What are the commonly used diagnostic methods? They mainly include measuring cylinder pressure, crankcase blowby, cylinder leakage and leakage rate, intake manifold vacuum, vibration measurement of abnormal noises caused by excessive wear of the cylinder piston assembly, and determination of the content of worn metal particles in the crankcase.
For the measurement of cylinder compression pressure, it mainly refers to the pressure at the end of the compression stroke of a four-stroke engine. Due to factors such as cylinder pressure, oil viscosity, cylinder piston assembly matching, the correctness of valve timing adjustment, and the sealing of the cylinder head gasket, when measuring the pressure of the engine cylinder, the sealing condition of the cylinder piston assembly can be diagnosed. If the piston rings, valves, and cylinder head gasket are well sealed, the valve clearance should be appropriate.
II. Muffler Fastening Test
The muffler consists of an outer cylinder and an inner honeycomb structure. The two parts are joined together by a mechanical clamping process because they are in a high-temperature, vibrating environment. If the connection is not firm, it may loosen or fall off during vehicle use due to high temperature and vibration. However, rest assured that relevant quality departments have imposed very strict requirements on this aspect.
For actual detection methods, the industry uses material testing machines with compression plate fixtures to subject the two components of the muffler to relevant vertical shear forces. The repeatability error of the measured results should be less than 5%.
III. Interior Trim Inspection
Interior trim includes seat materials, interior trim materials, and adhesives.
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06-14
In 2010, China's auto parts industry made significant progress thanks to the rapid development of automakers. This highlighted the importance of collaborative development between auto parts and automaker enterprises, including simultaneous development, automaker support, and increased use of domestic auto parts. If automakers focus on purchasing foreign parts, it could lead to foreign control of key components and significant losses for domestic parts companies.
06-14
Challenges in the Development of Auto Parts
The commercial vehicle parts industry is highly fragmented, with most companies being newly established individual enterprises. For these small and medium-sized enterprises (SMEs), the initial capital investment is already substantial, and post-production profits are not high. Therefore, it is relatively difficult to encourage them to increase R&D investment. Moreover, the prices of auto parts raw materials have been rising steadily for a certain period, requiring enterprises to allocate a significant portion of their funds to raw materials.
06-14
Automotive parts performance testing
There are seven factors that affect cylinder sealing, mainly cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder gasket damage, and valve clearance.
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