Automotive Acronyms And Abbreviations

The following items are commonly used automotive acronyms and abbreviations: *5MT: 5-speed manual transmission *A4: 4-speed

automatic transmission An automatic transmission (AT) or automatic gearbox is a multi-speed transmission (mechanics), transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions. The 1904 ...

*A5: 5-speed automatic transmission *A6: 6-speed automatic transmission *ABS: Anti-lock braking system *AC: Alternating Current *A/C:

Air conditioning Air conditioning, often abbreviated as A/C (US) or air con (UK), is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature, and in some cases, also controlling the humidity of internal air. Air c ...

*ADAS: Advanced Driving Autonomous Systems *ADB: Adaptive Driving Beam * AdvHEV: Hybrid vehicle *AGS: Adaptive transmission control *AHC: Automatic height controller *AMT:

Automated manual transmission The automated manual transmission (AMT) is a type of transmission (mechanics), transmission for motor vehicles. It is essentially a conventional manual transmission equipped with automatic actuation to operate the clutch and/or shift Gear train ...

*AFL: Adaptive front light *AFS: Adaptive front-light system *ALH: Adaptive LED Headlights *ATLS: Automated truck loading systems *

Autogas Autogas is liquefied petroleum gas (LPG) used as a fuel in internal combustion engines of vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane. Autogas is widely used as a "green" fuel, ...

: LPG when used as a vehicle fuel *AVT: Antenna Amplifier Tuner *AWD: All Wheel Drive *BSM: Blind spot monitor * CAB 1493: California Assembly Bill 1493 * CARB:

California Air Resources Board The California Air Resources Board (CARB or ARB) is an agency of the government of California that aims to reduce air pollution. Established in 1967 when then-governor Ronald Reagan signed the Mulford-Carrell Act, combining the Bureau of Air S ...

*CCP: Coupled cam phasing *CH₄:

Methane Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The abundance of methane on Earth makes ...

*CNG:

Compressed natural gas Compressed natural gas (CNG) is a fuel gas mainly composed of methane (CH4), compressed to less than 1% of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of , usually in ...

Carbon dioxide Carbon dioxide is a chemical compound with the chemical formula . It is made up of molecules that each have one carbon atom covalent bond, covalently double bonded to two oxygen atoms. It is found in a gas state at room temperature and at norma ...

*CTS: Cruising & Traffic Support * CVVL: Continuous variable valve lift *CVT:

Continuously variable transmission A continuously variable transmission (CVT) is an automated Transmission (mechanical device), transmission that can change through a continuous range of gear ratios, typically resulting in better fuel economy in gasoline applications. This contr ...

*DAA: Driver Attention Alert *DC:

Direct current Direct current (DC) is one-directional electric current, flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor (material), conductor such as a wire, but can also flow throug ...

*DCP: Dual cam phasing *DCT:

Dual clutch transmission A dual-clutch transmission (DCT) (sometimes referred to as a twin-clutch transmission) is a type of multi-speed vehicle transmission system, that uses two separate clutches for odd and even gear sets. The design is often similar to two separa ...

* DeAct:

Cylinder deactivation Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large multi-cylinder engines. Many automobil ...

* dHCCI: Diesel homogeneous charge compression ignition *DMV: California Department of Motor Vehicles *

DOHC An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combus ...

: Dual overhead cam *DRL: Daytime Running Lights *DRSS: Distance Recognition Support System *DSC:

Dynamic stability control Electronic stability control (ESC), also referred to as electronic stability program (ESP) or dynamic stability control (DSC), is a computerized technology that improves a vehicle's stability by detecting and reducing loss of traction ( skiddi ...

* DVVL: Discrete variable valve lift * DVVLd: Discrete variable valve lift, includes dual cam phasing * DVVLi: Discrete variable valve lift, includes intake valve cam phasing *eACC: Improved electric accessories *EAT: Electronically assisted turbocharging *EFI: Electronic Fuel Injection *EGR:

Exhaust gas recirculation In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide () emissions reduction technique used in petrol engine, petrol/gasoline, diesel engines and some hydrogen internal combustion engine vehicle, hydrogen engines. ...

* ehCVA: Electrohydraulic camless valve actuation * emCVA: Electromagnetic camless valve actuation * EHPS: Electrohydraulic power steering *EPB: Electronic Parking Brake *EPS: Electric power steering * EMFAC: ARB emission factors modeling software (EMFAC2007 v.2.3 November 1, 2006) *ESC:

Electronic stability control Electronic stability control (ESC), also referred to as electronic stability program (ESP) or dynamic stability control (DSC), is a computerized technology that improves a car handling, vehicle's stability by detecting and reducing loss of Tract ...

*ESP: Electronic stability program *EWP: Electric water pump *EWP: Elevating work platform *FDC: Fixed displacement compressor *FWD:

Front-wheel drive Front-wheel drive (FWD) is a form of internal combustion engine, engine and transmission (mechanics), transmission layout used in motor vehicles, in which the engine drives the front wheels only. Most modern front-wheel-drive vehicles feature ...

FTP The File Transfer Protocol (FTP) is a standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and dat ...

: Federal test procedure * g/mi: grams per mile *GDI:

Gasoline direct injection Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a fuel injection system for internal combustion engines that run on gasoline (petrol) which injects fuel directly into the combustion chamber. This is distinct f ...

*GDI-S: Stoichiometric gasoline direct injection *GDI-L: Lean-burn gasoline direct injection * gHCCI: Gasoline homogeneous charge compression ignition *GHG:

Greenhouse gas Greenhouse gases (GHGs) are the gases in the atmosphere that raise the surface temperature of planets such as the Earth. Unlike other gases, greenhouse gases absorb the radiations that a planet emits, resulting in the greenhouse effect. T ...

*GT: Gran/Grand turismo *GVW: Gross vehicle weight *

GVWR Vehicle weight is a measurement of wheeled motor vehicles; either an actual measured weight of the vehicle under defined conditions or a gross weight rating for its weight carrying capacity. Curb or kerb weight Curb weight (American English) or k ...

Gross vehicle weight rating Vehicle weight is a measurement of wheeled motor vehicles; either an actual measured weight of the vehicle under defined conditions or a gross weight rating for its weight carrying capacity. Curb or kerb weight Curb weight (American English) or k ...

*GWP:

Global warming potential Global warming potential (GWP) is a measure of how much heat a greenhouse gas traps in the atmosphere over a specific time period, relative to carbon dioxide (). It is expressed as a multiple of warming caused by the same mass of carbon dioxide ( ...

*HAD: Highly Autonomous Driving *HBC: High Beam Control *HC:

Hydrocarbons In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and hydrophobic; their odor is usually faint, and may b ...

*HEV: Hybrid-electric vehicle *HFC:

Hydrofluorocarbon Hydrofluorocarbons (HFCs) are synthetic organic compounds that contain fluorine and hydrogen atoms, and are the most common type of organofluorine compounds. Most are gases at room temperature and pressure. They are frequently used in air condit ...

* hp:

Horsepower Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are t ...

* HSDI: High-speed (diesel) direct injection *HUD: Automotive head-up display *ICP: Intake cam phaser *IGN: Ignition * ImpAlt: Improved efficiency alternator *ISG: Integrated starter-generator system *ISG-SS: Integrated starter-generator system with start-stop operation * L4: In-line four-cylinder *LDT: Light-duty truck *LDT1: a light-duty truck with a loaded vehicle weight of up to 3750 pounds. *LDT2: an LEV II light-duty truck with a loaded vehicle weight of 3751 pounds to a gross vehicle weight of 8500 pounds *LED: Light Emitting Diode *LEV:

Low-emission vehicle A low-emission vehicle is a motor vehicle that emits relatively low levels of motor vehicle emissions. The term may be used in a general sense, but in some countries it is defined in air quality statutes. Different groups of people ("go greens", " ...

*LPG:

Liquified petroleum gas Liquefied petroleum gas, also referred to as liquid petroleum gas (LPG or LP gas), is a fuel gas which contains a flammable mixture of hydrocarbon gases, specifically propane, ''n''-butane and isobutane. It can also contain some propyl ...

*LVW: Loaded vehicle weight *MAC: Mobile air conditioning * MDPV: Medium-duty passenger vehicle *MDV: Medium-duty vehicle * mg/mi: Milligrams per mile * ModHEV: Moderate hybrid *MT:

Manual Transmission A manual transmission (MT), also known as manual gearbox, standard transmission (in Canadian English, Canada, British English, the United Kingdom and American English, the United States), or stick shift (in the United States), is a multi-speed ...

* NMOG: Non-methane organic gas * N₂O:

Nitrous oxide Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, or factitious air, among others, is a chemical compound, an Nitrogen oxide, oxide of nitrogen with the Chemical formula, formula . At room te ...

* NOx: Oxides of nitrogen *PB: Power brakes *PC: passenger car *RPM: Revolutions Per Minute *PS: Power steering *

R-134a 1,1,1,2-Tetrafluoroethane (also known as norflurane ( INN), R-134a, Klea 134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, HFA-134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with therm ...

: Refrigerant 134a,

tetrafluoroethane Tetrafluoroethane is a fluoroalkane with two isomers: * 1,1,2,2-Tetrafluoroethane (R-134) * 1,1,1,2-Tetrafluoroethane (R-134a) Fluoroalkanes Hydrofluorocarbons {{Short pages monitor