Dictionary of Automotive Terms Abbreviations

DICTIONARY OF AUTOMOTIVE TERMS - "Et"

ET: Acronym for Elapsed time. The length of time it takes a Dragster to complete the one-fourth mile run.

ETBE: Acronym for ethyl tertiary butyl ether (CH₃)3COC₂H. An Oxygenate blend stock formed by the catalytic etherification of Isobutylene with Ethanol

ETC

Etching

A roughening or disintegration of the paint surface, which can occur on small patches or over a wide area, through attack from bird droppings, soap deposits, industrial fallout, etc. Also called lifting.
The removal of soil or the natural oxide film from an aluminium surface, giving a roughened surface which improves adhesion of the subsequent paint layer, or removal of the actual metal.
A system of marking car windows with the registration number so as to deter thieves.

Also See
Cathodic Etching
Caustic etching
Window etching

Etching primer: A Primer for aluminum which has an etching effect to improve adhesion

Etch primer: A Primer for aluminum which has an etching effect to improve adhesion

Ethane: (C2H6) A normally gaseous straight-chain hydrocarbon. It is a colorless paraffinic gas that boils at a temperature of -88.6°C. It is extracted from natural gas and refinery gas streams. It is a Refrigerant (R-170) sometimes added to other refrigerants to improve Oil circulation.

Ethanol: (CH3-CH2OH) A clear, colorless, flammable oxygenated hydrocarbon. Ethanol is typically produced chemically from ethylene, or biologically from fermentation of various sugars from carbohydrates found in agricultural crops and cellulosic residues from crops or wood. It is used in the United States as a gasoline octane enhancer and oxygenate (blended up to 10 percent concentration). Ethanol can also be used in high concentrations (E85) in vehicles designed for its use. The lower heating value, equal to 76,000 Btu per gallon, is assumed for estimates in the Renewables Energy Annual report. Also known as Ethyl Alcohol or Grain Alcohol
See
Fuel ethanol E85.

Ether: A generic term applied to a group of organic chemical compounds composed of carbon, hydrogen, and oxygen, characterized by an oxygen atom attached to two carbon atoms (e.g., methyl tertiary butyl ether).
Also see
Dimethyl Ether
Methyl Tertiary Butyl Ether
Tertiary Amyl Ethyl Ether
Tertiary Amyl Methyl Ether

Etherification: Oxygenation of an Olefin by methanol or ethanol. For example, MTBE is formed from the chemical reaction of Isobutylene and Methanol

Ethylene: An Olefinic hydrocarbon recovered from refinery processes or petrochemical processes. Ethylene is used as a petrochemical feedstock for numerous chemical applications and the production of consumer goods.

Ethylene dichloride: A colorless, oily liquid used as a solvent and fumigant for organic synthesis, and for ore flotation.

Ethylene glycol: A chemical solution added to the Cooling system to protect against freezing.

Also See
Antifreeze.

Ethyl Ester: A fatty Ester formed when organically derived oils are combined with Ethanol in the presence of a Catalyst. After water washing, vacuum drying, and filtration, the resulting ethyl ester has characteristics similar to petroleum-based diesel motor fuels.
Also see
Tertiary Amyl Ethyl Ether

Ethyl gasoline: Gasoline to which ethyl fluid ( Tetraethyl lead ethylene dibromide, ethylene dichloride, or another octane improver) has been added to improve the gasoline's Resistance to Knocking. It slows down the burning rate thereby creating a smooth pressure curve that will allow the gasoline to be used in high Compression engines. It is a generic term describing premium or high-octane fuel. It was first sold in 1924.

Ethyl Tertiary Butyl Ether: (ETBE) An Aliphatic Ether similar to MTBE. This fuel oxygenate is manufactured by reacting Isobutylene with ethanol. Having high octane and low volatility characteristics, ETBE can be added to gasoline up to a level of approximately 17% by volume. ETBE is not yet commercially available.

ETR