Abbreviations.

Checkout our iOS App for a better way to browser and research.

§ 86.078-3 Abbreviations.

The abbreviations in this section apply to this subpart and also to subparts B, D, H, I, J, N, O and P of this part and have the following meanings:

accel. - acceleration.

AECD - Auxiliary emission control device.

API - American Petroleum Institute.

ASTM - American Society for Testing and Materials.

BHP - Brake horsepower.

BSCO - Brake specific carbon monoxide.

BSHC - Brake specific hydrocarbons.

BSNOX - Brake specific oxides of nitrogen.

C - Celsius.

cfh - cubic feet per hour.

CFV - Critical flow venturi.

CFV-CVS - Critical flow venturi - constant volume sampler.

CH4 methane.

CL - Chemiluminescence.

CO2 - carbon dioxide.

CO - Carbon monoxide.

conc. - concentration.

cfm - cubic feet per minute.

CT - Closed throttle.

cu. in. - cubic inch(es).

CVS - Constant volume sampler.

decel. - deceleration.

EP - End point.

evap. - evaporative.

F - Fahrenheit.

FID - Flame ionization detector.

FL - Full load.

ft. - feet.

g - gram(s).

gal. - U.S. gallon(s).

GVW - Gross vehicle weight.

GVWR - Gross vehicle weight rating.

h - hour(s).

H2O - water.

HC - hydrocarbon(s).

HFID - Heated flame ionization detector.

Hg - mercury.

hi - high.

hp. - horsepower.

IBP - Initial boiling point.

ID - Internal diameter.

in. - inch(es).

K - kelvin.

kg - kilogram(s).

km - kilometer(s).

kPa - kilopascal(s).

lb. - pound(s).

lb.-ft. - pound-feet.

m - meter(s).

max. - maximum.

mg - milligram(s).

mi. - mile(s).

min. - minute(s).

ml - milliliter(s).

mm - millimeter(s).

mph - miles per hour.

mv - millivolt(s).

N2 - nitrogen.

NDIR - Nondispersive infrared.

NO - nitric oxide.

NO2 - nitrogen dioxide.

N2O nitrous oxide.

NOX - oxides of nitrogen.

No. - Number.

O2 - oxygen.

Pb - lead.

pct. - percent.

PDP-CVS - Positive displacement pump - constant volume sampler.

ppm - parts per million by volume.

ppm C - parts per million, carbon.

psi - pounds per square inch.

psig - pounds per square inch gauge.

PTA - Part throttle acceleration.

PTD - Part throttle deceleration.

R - Rankin.

rpm - revolutions per minute.

RVP - Reid vapor pressure.

s - second(s).

SAE - Society of Automotive Engineers.

SI - International system of units.

sp. - speed.

TEL - Tetraethyl lead.

TML - Tetramethyl lead.

UDDS - Urban dynamometer driving schedule.

V - volt(s).

vs - versus.

W - watt(s).

WF - Weighting factor.

WOT - Wide open throttle.

wt. - weight.

′ - feet.

″ - inch(es).

° - degree(s).

∑ - summation.

[42 FR 32907, June 28, 1977, as amended at 45 FR 4149, Jan. 21, 1980; 74 FR 56373, Oct. 30, 2009]


Download our app to see the most-to-date content.