40 CFR § 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]