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New York City Transit Hybrid and CNG Transit Buses: Interim Evaluation Results - page 54 / 64

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Acronyms and Abbreviations

AVTA—Advanced Vehicle Testing Activity bhp—brake horsepower CNG—compressed natural gas CO—carbon monoxide DDC—Detroit Diesel Corporation DOC—diesel oxidation catalyst DOE—U.S. Department of Energy DPF—diesel particulate filter EPA—U.S. Environmental Protection Agency EGR—exhaust gas recirculation g/bhp-hr—grams per brake horsepower hour HC—hydrocarbons HEV—hybrid electric vehicle HVAC—heating, ventilation, and air conditioning LIRR—Long Island Railroad LI Bus—Long Island Bus MBRC—miles between roadcalls MCH—Mother Clara Hale Depot MTA—Metropolitan Transportation Authority NREL—National Renewable Energy Laboratory NYCT—New York City Transit NMHC—non-methane hydrocarbons NOx—oxides of nitrogen PCS—power control system PM—particulate matter ppm—parts per million PMI—preventive maintenance inspection RC—roadcall R&D—research and development rpm—revolutions per minute scfm—standard cubic feet per minute SCR—selective catalytic reduction ULSD—ultra low sulfur diesel

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