A |
|---|
| A/C: | air conditioning |
| ABT: | averaging, banking & trading |
| AGA: | American Gas Association |
| ALVW: | adjusted loaded vehicle weight |
| ANSI: | American National Standards Institute |
| ATV: | all-terrain vehicle |
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B |
|---|
| bhp: | break horsepower |
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C |
|---|
| CAA: | Clean Air Act |
| cc: | cubic centimeter |
| CCD: | EPA’s Certification and Compliance Division |
| CFR: | Code of Federal Regulations |
| CFV: | Clean Fuel Vehicle |
| CI: | compression-ignition |
| CNG: | compressed natural gas |
| CO: | carbon monoxide |
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E |
|---|
| E10: | a mixture of 10 percent ethanol and 90 percent gasoline |
| EPA: | Environmental Protection Agency |
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F |
|---|
| FEL: | Family Emission Limit |
| FTP: | Federal Test Procedure |
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G |
|---|
| g: | grams |
| g/bhp-hr: | grams per brake horsepower-hour |
| g/kN: | grams per kilonewton |
| g/kW-hr: | grams per kilowatt-hour |
| g/mi: | grams per mile |
| GPA: | Geographic Phase-in Area |
| gpm: | grams per minute |
| GVW: | gross vehicle weight |
| GVWR: | gross vehicle weight rating |
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H |
|---|
| HC: | hydrocarbons |
| HC+NOx: | hydrocarbons + nitrogen oxides |
| HDDE: | heavy-duty diesel engine |
| HDE: | heavy-duty engine |
| HDV: | heavy-duty vehicle |
| HHDDE: | heavy heavy-duty diesel engine |
| HLDT: | heavy light-duty truck |
| hp: | horsepower |
| HS: | high sulfur (greater than 500 ppm sulfur) |
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I |
|---|
| ICAO: | International Civil Aviation Organization |
| ILEV: | Inherently Low Emission Vehicle |
| ISO: | International Organization for Standardization |
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K |
|---|
| K: |
Kilo- (thousand) |
| kN: | kilonewton |
| kW: | kilowatt |
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L |
|---|
| L: | liter |
| lbs: | pounds |
| LDT: | light-duty truck |
| LDT2: | light-duty truck 2 |
| LDT3: | light-duty truck 3 |
| LDT4: | light-duty truck 4 |
| LDV: | light-duty vehicle |
| LEV: | Low Emission Vehicle |
| LHDDE: | light heavy-duty diesel engine |
| LLDT: | light light-duty truck |
| LM: | locomotive and marine |
| LPG: | liquefied petroleum gas (Propane) |
| LVW: | loaded vehicle weight |
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M |
|---|
| M10: | a mixture of 10 percent methanol and 90 percent gasoline |
| max: | maximum |
| MDPV: | medium-duty passenger vehicle |
| MHDDE: | medium heavy-duty diesel engine |
| mi: | mile |
| min: | minimum |
| mph: | miles per hour |
| mw: | megawatt |
| MY: | model year |
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N |
|---|
| NGV: | natural gas vehicle |
| NLEV: | National Low Emission Vehicle |
| NMHC: | non-methane hydrocarbon |
| NMHCE: | non-methane hydrocarbon equivalent |
| NMOG: | non-methane organic gases |
| NOx: | nitrogen oxides |
| NOx+HC: | nitrogen oxides + hydrocarbons |
| NR: | nonroad |
| NRLM: | nonroad, locomotive, and marine |
| NTE: | not to exceed |
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O |
|---|
| OBD: | on-board diagnostics |
| ORVR: | on-board refueling vapor recovery |
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P |
|---|
| PM: | particulate matter |
| ppm: | parts per million |
| PWC: | personal watercraft |
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R |
|---|
| rO: | rated output |
| rpm: | revolutions per minute |
| rPR: | rated pressure ratio |
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S |
|---|
| s: | seconds |
| SAE: | Society of Automotive Engineers |
| SFTP: | Supplemental Federal Test Procedure |
| SI: | spark-ignition |
| SN: | smoke number |
| SULEV: | Super-Ultra-Low Emission Vehicle |
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T |
|---|
| THC: | total hydrocarbons |
| THCE: | total hydrocarbon equivalent |
| TLEV: | Transitional Low Emission Vehicle |
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U |
|---|
| UDDS: | Urban Dynamometer Driving Schedule |
| ULEV: | Ultra-Low Emission Vehicle |
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Z |
|---|
| ZEV: | Zero Emission Vehicle |
