The canister/shell is the outer housing of a Diesel Oxidation Catalyst (DOC) that contains and protects the catalyst substrate while directing exhaust flow.
The canister or shell in a Diesel Oxidation Catalyst (DOC) is a cylindrical or oval-shaped metal enclosure designed to house the ceramic or metallic catalyst substrate. It serves as a structural container that withstands high exhaust temperatures (typically up to 700°C), pressure fluctuations, and mechanical stresses while ensuring proper exhaust gas distribution across the catalyst surface. The shell provides thermal insulation, prevents catalyst damage from external impacts, and maintains the integrity of the exhaust system by sealing against gas leaks.
诱因 → 失效模式 → 工程缓解
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It houses and protects the catalyst substrate, directs exhaust flow, and withstands high temperatures and pressures in diesel exhaust systems.
Stainless steel offers excellent corrosion resistance, high-temperature strength, and durability under thermal cycling conditions typical in exhaust applications.
Proper design ensures uniform gas flow distribution, minimizes thermal losses, prevents leaks, and maintains structural integrity under vibration and thermal stress.
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