This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Orange County Transportation Authority's Cleaner Air Through Reduced-Emission Systems (OCTA CARES) Program
Annotation ability available
Sector:
Language:
English
Abstract
The Orange County Transportation Authority's Cleaner Air through Reduced-Emission Systems (OCTA CARES) program is evaluating several options for reducing transit bus emissions. OCTA initiated the program in response to the 1991 Federal and California heavy-duty emission standards, and potential South Coast Air Quality Management District (SCAQMD) requirements for transit fleets to utilize clean alternative fuels. Through the OCTA CARES program's Comparative Evaluation of Clean Fuels demonstration project, alternative fuels such as methanol, compressed natural gas (CNG), and liquefied petroleum gas (LPG) are being demonstrated and evaluated in Gillig Phantom buses equipped with Cummins L10 engines. Data are being collected on all aspects of on-road bus operation and performance, including fuel economy, fuel prices, maintenance, and road calls. In addition, exhaust emissions - oxides of nitrogen (NOx), carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC), particulate (PM), and formaldehyde - are being measured through chassis dynamometer testing. This paper discusses the results to date of the Comparative Evaluation of Clean Fuels project, and summarizes other current and future projects in the OCTA CARES program.
Topic
Citation
Lonyai, F., Unnasch, S., Dunlap, L., Sullivan, C. et al., "The Orange County Transportation Authority's Cleaner Air Through Reduced-Emission Systems (OCTA CARES) Program," SAE Technical Paper 942318, 1994, https://doi.org/10.4271/942318.Also In
Alternative Fuel Developments and Overseas Design Influences on North American Bus Operations
Number: SP-1058; Published: 1994-11-01
Number: SP-1058; Published: 1994-11-01
Heavy Duty Vehicles and Alternative Fuels: Choices in Future Transportation
Number: SP-1060; Published: 1994-11-01
Number: SP-1060; Published: 1994-11-01
References
- ARB “Guidelines for New Heavy-Duty Vehicles to Generate Mobile Source Emission Reduction Credits,” Sacramento, California December 10 1993
- Browning, L. et al. “Technical Feasibility of Reducing NO x and Particulate Emissions from Heavy-Duty Engines,” California Air Resources Board under Contract No. A132-085 Acurex Environmental Corporation Mountain View, California April 1993
- Dunlap, L. S. et al. “Chassis Dynamometer Emissions Testing Results for Diesel and Alternative-Fueled Transit Buses,” SAE Paper No. 931783 August 1993
- SCAQMD “Air Quality Management Plan, 1991 Revision, Draft Appendix IV-C, District's Mobile Source Control Measures,” December 1990
- Unnasch, S. et al. “Performance and Emissions of Clean Fuels in Transit Buses with Cummins L10 Engines,” SAE Paper No. 931782 August 1993
- Urban, C. “Dynamometer Simulation of Truck and Bus Road Horsepower for Transient Emissions Evaluations,” SAE Paper 840349 February 1984