Development of New Technologies Targeting Zero Emissions for Gasoline Engines 2000-01-0890
This paper describes new technologies for achieving exhaust emission levels much below the SULEV standards in California, which are the most stringent among the currently proposed regulations in the world. Catalyst light-off time, for example, has been significantly reduced through the adoption of a catalyst substrate with an ultra-thin wall thickness of 2 mil and a catalyst coating specifically designed for quicker light-off. A highly-efficient HC trap system has been realized by combining a two-stage HC trap design with an improved HC trap catalyst. The cold-start HC emission level has been greatly reduced by an electronically actuated swirl control valve with a high-speed starter. Further, an improved Air Fuel Ratio (AFR) control method has achieved much higher catalyst HC and NOx conversion efficiency.
Citation: Nishizawa, K., Momoshima, S., Koga, M., and Tsuchida, H., "Development of New Technologies Targeting Zero Emissions for Gasoline Engines," SAE Technical Paper 2000-01-0890, 2000, https://doi.org/10.4271/2000-01-0890. Download Citation
Also in:
Lev-Ii Emission Solutions-SP-1510, Advanced Developments in Ultra-Clean Gasoline-Powered Vehicles-PT-104, SAE 2000 Transactions Journal of Fuels and Lubricants-V109-4
Related Topics:
Air / fuel ratio
Exhaust emissions
Catalysts
Low emission vehicles (LEV) and zero emission vehicles (ZEV)
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