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Electrically Heated Extruded Metal Converters for Low Emission Vehicles
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English
Abstract
The primary objective of this work is to demonstrate that an extruded metal electrically heated catalyst (EHC) in combination with a traditional converter can achieve the Low and Ultra-Low California standards. With various aged EHC/converter systems and various heating strategies, typical FTP non-methane hydrocarbon (NMHC) emissions range from .015 to .030 g/mi. However, NMHC emissions as low as .008 g/mi are achieved.
In addition to reducing emissions, experiments were conducted to investigate the impact various heating strategies and system design parameters have on electrical energy usage. The conclusions are that electrical energy requirements can be significantly reduced by:
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Locating the EHC close to the main converter.
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Locating the EHC and main converter close to the engine.
- Reducing the mass of the EHC.
- Heating the EHC prior to engine start-up.
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Citation
Socha, L. and Thompson, D., "Electrically Heated Extruded Metal Converters for Low Emission Vehicles," SAE Technical Paper 920093, 1992, https://doi.org/10.4271/920093.Also In
References
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- “Vehicle Emission Performance with an Electrically Heated Converter System,” SAE Paper 912385 Kubsh, J. E. Lissiuk, P. W. October 1991