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SULEV and “Off-Cycle” Emissions Benefits of a Vacuum-Insulated Catalytic Converter
In previous SAE papers, the initial development and testing of a vacuum-insulated catalytic converter was presented. This paper provides an update of the converter development and an analysis of potential off-cycle emissions savings. Hot vibration, cool-down, and 1975 Federal Test Procedure (FTP-75) emissions test results are provided to demonstrate the effectiveness of design improvements in greatly increasing durability while retaining performance. Using standard drive cycles and “real-world” driving statistics with a vehicle simulator (ADVISOR
), catalyst temperature and vehicle exhaust emissions of a sport utility vehicle (SUV) were predicted for 16 days of driving (107 trips, 770 total miles). Compared to the baseline vehicle with a conventional catalytic converter, the SUV with a vacuum-insulated converter produced 66% less non-methane hydrocarbon (NMHC), 65% less carbon monoxide (CO), and 60% less oxides of nitrogen (NO
Burch, S. and Biel, J., "SULEV and “Off-Cycle” Emissions Benefits of a Vacuum-Insulated Catalytic Converter," SAE Technical Paper 1999-01-0461, 1999,
Steven D. Burch, John P. Biel
National Renewable Energy Laboratory, Benteler Automotive Corp.
International Congress & Exposition
Gas Direct Injection Aftertreatment and Exhaust Aftertreatment Modeling-SP-1455, SAE 1999 Transactions - Journal of Fuels and Lubricants-V108-4
Low emission vehicles (LEV) and zero emission vehicles (ZEV)
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