AECD—Auxiliary emission control device

ASME—American Society of Mechanical Engineers

ASTM—American Society for Testing and Materials

CAA—Clean Air Act

CAAA—Clean Air Act Amendments of 1990

CLD—chemiluminescent detector

CO—Carbon monoxide

CO2—Carbon dioxide

EPA—Environmental Protection Agency

FTP—Federal Test Procedure

g/kW-hr—grams per kilowatt hour

HC—hydrocarbons

HCLD—heated chemiluminescent detector

HFID—heated flame ionization detector

ICI—independent Commercial Importer

NDIR—non-dispersive infrared analyzer

NIST—National Institute for Standards and Testing

NO—Nitric oxide

NO2—Nitrogen dioxide

NOX—Oxides of nitrogen

O2—Oxygen

OEM—original equipment manufacturer

PMD—paramagnetic detector

SAE—Society of Automotive Engineers

SEA—Selective Enforcement Auditing

SI—spark-ignition

U.S.C.—United States Code

VOC—Volatile organic compounds

ZROD—zirconiumdioxide sensor