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Catalytic Converter Applications for Two Stroke, Spark - Ignited Marine Engines
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English
Abstract
When catalytic converters are used for cleansing of exhaust gas from two - stroke marine engines, new issues must be brought up in combination with prior technology. Therefore, a study was made of V6, 2600cc engines having a large volume of hydrocarbon emissions with respect to three issues:
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(1)
To what degree seawater effects catalytic converter performance and possible countermeasures
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(2)
Effects attained on cleansing level and catalyst temperature
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(3)
Finding abatement levels for catalyst degradation and exhaust emission output in the marine mode.
It was found that physical adsorption was a significant factor in catalytic degradation resulting from direct contact with seawater. The cleansing levels obtained when a marine engine is equipped with a catalyst converter were found by clarifying the extent of effects of catalyst volume, performance and temperature. The reduction obtained in exhaust emissions allowing for a degradation factor, is shown in a catalytic converter heated to the maximum temperature of 960 °C.
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Citation
Fujimoto, H., lsogawa, A., and Matsumoto, N., "Catalytic Converter Applications for Two Stroke, Spark - Ignited Marine Engines," SAE Technical Paper 941786, 1994, https://doi.org/10.4271/941786.Also In
References
- Coates S.W. Lassanske G.G. “Mesurement and Analysis of Gaseous Exhaust Emissions from Recreational and Small Commercial Marine Craft,” SAE Paper 901597 1990