94.3 Abbreviations.§ 94.3 Abbreviations.
The abbreviations of this section apply to all subparts of this part and have the following meanings:AECD - Auxiliary emission control device. API - American Petroleum Institute. ASTM - American Society for Testing and Materials. °C - Degrees Celsius. CH4 - Methane. CI - Compression ignition. CO - Carbon monoxide. CO2 - Carbon dioxide. disp. - volumetric displacement of an engine cylinder. EGR - Exhaust gas recirculation. EP - End point. EPA - Environmental Protection Agency. FEL - Family emission limit. ft - foot or feet. FTP - Federal Test Procedure. g - gram(s). g/kW-hr - Grams per kilowatt hour. gal - U.S. gallon. h - hour(s). HC - hydrocarbon. Hg - Mercury. hp - horsepower. ICI - Independent Commercial Importer. in - inch(es). K - Kelvin. kg - kilogram(s). km - kilometer(s). kPa - kilopascal(s). kW - kilowatt. L/cyl - liters per cylinder. m - meter(s). max - maximum. mg - milligram(s). min - minute. ml - milliliter(s). mm - millimeter. NIST - National Institute for Standards and Testing. NMHC - Non-methane hydrocarbons. NTIS - National Technical Information Service. NO - nitric oxide. NO2 - nitrogen dioxide. NOX - oxides of nitrogen. No. - number. O2 - oxygen. pct - percent. PM - particulate matter. PMM - post-manufacture marinizer. ppm - parts per million by volume. ppmC - parts per million, carbon. rpm - revolutions per minute. s - second(s). SAE - Society of Automotive Engineers. SEA - Selective Enforcement Auditing. SI - International system of units (i.e., metric). THC - Total hydrocarbon. THCE - Total hydrocarbon equivalent. U.S. - United States. U.S.C. - United States Code. vs - versus. W - watt(s). wt - weight. [64 FR 73331, Dec. 29, 1999, as amended at 74 FR 56374, Oct. 30, 2009]