For a New Paradigm in Aftertreatment: The Almost Zero Concept for Gasoline NOx and Hydrocarbon Emissions

Authors

Chang Hwan Kim, Hyokyoung Lee, Chun Yong Kang, Jin Woo Chung,
Hyundai Motor Group, Namyang, South Korea

Summary

Integration of catalysts into Internal Combustion Engines (ICEs) has been often referred as one of the greatest successes in automotive history over the last 40 plus years. With the great advancement in aftertreatment catalyst and engine control technology, the modern gasoline aftertreatment system is capable of reducing 99.9 % of NOₓ and HC emissions when catalysts are fully warmed up under stoichiometric operations. Most HC and NOₓ breakthroughs occur during cold-start and/or transient deceleration fuel-cut operations. In this work, we demonstrate a concept for cold-start HC and NOₓ controls followed by a fuel-cut NOₓ reduction technology. The proposed system will suggest that ICE engines still have potentials for a zero negative impact on the air quality as one of primary propulsion options in the future automotive world.

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