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Chassis Dynamometer Emissions Testing Results for Diesel and Alternative-Fueled Transit Buses
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English
Abstract
The Los Angeles County Metropolitan Transportation Authority (MTA) currently operates a state-of-the-art Heavy-Duty Vehicle Emissions Testing Facility (ETF) in cooperation with the California Air Resources Board (CARB), the California Energy Commission (CEC) and the South Coast Air Quality Management District (SCAQMD) for the purpose of evaluating the on-road exhaust emissions of heavy-duty trucks and buses. The ETF, consisting of a Schenck-Pegasus chassis dynamometer and a Horiba Instruments Vehicle Emissions Testing System (VETS), is capable of sampling and analyzing the exhaust emissions of both alternate fueled and diesel fueled transit buses and heavy-duty trucks. This paper will provide background on the design and operation of the ETF as well as emissions testing results for baseline diesel, particulate trap-equipped diesel, compressed natural gas, 100 percent methanol and methanol/Avocet fueled transit buses.
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Authors
- Lauren S. Dunlap - Los Angeles Metropolitan Transportation Authority
- Vince Pellegrin - Los Angeles Metropolitan Transportation Authority
- Randal Ikeda - Los Angeles Metropolitan Transportation Authority
- Ray Wilson - Los Angeles Metropolitan Transportation Authority
- Sylvia Stanley - Los Angeles Metropolitan Transportation Authority
- Harvey Porter - Los Angeles Metropolitan Transportation Authority
Topic
Citation
Dunlap, L., Pellegrin, V., Ikeda, R., Wilson, R. et al., "Chassis Dynamometer Emissions Testing Results for Diesel and Alternative-Fueled Transit Buses," SAE Technical Paper 931783, 1993, https://doi.org/10.4271/931783.Also In
Alternative Fuels: Alcohols, Hydrogen Natural Gas and Propane
Number: SP-0982; Published: 1993-08-01
Number: SP-0982; Published: 1993-08-01
References
- Urban Mass Transportation Administration “Baseline Advanced Design Transit Coach Specifications” April 4 1977
- EPA Urban Dynamometer Driving Schedule for Heavy Duty Vehicles Code of Federal Regulations 40 1991
- Urban, Charles “Dynamometer Simulation of Truck and Bus Road Horsepower for Transient Emissions Evaluation” SAE Paper No. 840349 February 1984
- Code of Federal Regulations 40 “Emissions Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate Exhaust Test Procedures