Evaluation of a low-sulfate automative emission-control system
In a project sponsored by EPA and carried out at Southwest Research Institute with the assistance of Volvo of America, an air-injected oxidation catalyst was added to the Volvo ''California Lambra-Sond'' three-way catalyst with feedback fuel injection in a four-cylinder 1978 Volvo 244 vehicle. After baseline determination of gaseous and sulfate emissions in the 1978 Federal Test Procedure performed on a Clayton chassis dynamometer, the air-injection system for the oxidation catalyst was modified to reduce sulfates. Optimization tests determined the best air-injection schedule for adequate CO control with limited sulfate production. Compared with the standard air-injection system, the air-modulation system tested reduced sulfate emissions by >99%. With the tested emission-control system, sulfate emissions were maintained at 1 mg/km for 64,000 km, and gaseous emissions were maintained within the 1981 standards for 56,350 km. Most of the emission-control deterioration apparently occurred in the air-modulation system; improvements in the hardware durability should enable the hardware to maintain gaseous emissions within the 1981 standards for 80,500 km.
- Research Organization:
- Southwest Research Institute, San Antonio, TX
- OSTI ID:
- 6200211
- Report Number(s):
- CONF-8006276-
- Journal Information:
- SAE Prepr.; (United States), Vol. 800821; Conference: SAE passenger car meeting, Dearborn, MI, USA, 9 Jun 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AUTOMOBILES
EXHAUST GASES
AUTOMOTIVE INDUSTRY
RESEARCH PROGRAMS
CATALYTIC CONVERTERS
COMPARATIVE EVALUATIONS
DESIGN
US EPA
AIR POLLUTION CONTROL
CARBON MONOXIDE
CATALYSTS
EXPERIMENTAL DATA
SULFATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CONTROL
DATA
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
INDUSTRY
INFORMATION
NATIONAL ORGANIZATIONS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SULFUR COMPOUNDS
US ORGANIZATIONS
VEHICLES
WASTES
330700* - Advanced Propulsion Systems- Emission Control