The truck engine oil and gas shell, as the core component of the separation of the engine lubrication system from oil and gas, is a "invisible guard" that ensures the stable output of power under heavy load conditions. It is specially designed for rigorous scenarios such as long-distance transportation and heavy-duty operations.
Material selection to withstand extreme tests
In view of the long-term high-load operation of truck engines, the main body of the shell uses high-strength gray cast iron (HT300), which eliminates internal stress after aging treatment, and has a tensile strength of more than 300MPa, which can withstand the continuous pressure caused by long-term erosion of engine oil and cylinder vibration. The inner wall adopts precision boring process, and the surface roughness is controlled within Ra1.6μm, which reduces the oil flow resistance while reducing friction loss with internal parts. For high-temperature areas (near the exhaust manifold side), an additional 3mm wall thickness is added and a copper heat sink is embedded to increase the local high-temperature resistance to 350°C, avoiding seal failure caused by thermal deformation.
Functional design, taking into account separation and protection
Oil and gas separation efficiency is the core indicator: the inner cavity of the shell adopts a dual structure of "maze + cyclone separation". After the oil and gas mixture enters, it first strikes and separates large oil droplets through a multi-layer baffle, and then generates centrifugal force through the spiral channel, throws the small oil mist to the wall and converges backflow. The separation efficiency can reach more than 95%, greatly reducing engine oil loss and extending the truck oil change cycle by 15%. There is a large-capacity oil collection chamber at the bottom, with a volume of 20% higher than that of the traditional shell, which can buffer the pulsation of the engine oil to ensure stable oil supply in the lubricating system, and is especially suitable for working conditions such as hill climbing and rapid acceleration.
The sealing performance is comprehensively upgraded: the joint surface with the cylinder adopts a stepped design, an oil-resistant nitrile rubber seal ring is embedded, and 12 uniformly distributed high-strength bolts (8.8 levels) are used to achieve ultra-high pressure sealing, and can maintain zero leakage when the oil pressure reaches 8bar. The top of the housing integrates a fuel refueling port and an oil level observation window. The fuel refueling port is equipped with a check valve to prevent overflow when pouring oil; the observation window is made of high-transparent polycarbonate material, which is resistant to oil stains and impacts. It can directly view the oil level without disassembly, simplifying daily inspection procedures.
Installation adaptability covers mainstream models: the shell reserves standardized installation holes, accurately match mainstream truck engine models such as Dongfeng Cummins, Weichai WP series, and Xichai CA6DL. It is quickly fixed by positioning pins and bolts, and the installation error is controlled within 0.5mm to ensure seamless connection with the cylinder block, oil pan and other components. For modified engines or imported models, three-dimensional scanning customization services can be provided, modeled and produced according to actual sizes, and meet personalized adaptation needs.
Durability details are full: the outer part of the shell is sprayed with double-layer high-temperature anti-rust paint, the bottom layer of zinc-based phosphating treatment enhances adhesion, and the surface fluorocarbon coating has a salt spray resistance of more than 1,000 hours, adapting to humid and dusty environments such as coastal areas and mining areas. The key connection parts adopt a rounded corner transition design to avoid stress concentration. After 100,000 vibration tests (simulated 500,000 kilometers of driving), there is no cracks, and the service life is far beyond the industry average.
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