Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.

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Emissions

Emissions are basically chemicals in exhaust gases that are harmful to air quality, mainly carbon monixide (CO), hydrocarbons (HC), and nitrogen oxides (NO). Healthy engines produce fewer of emissions, and older or "unhealthy" engines produce more. Some engine designs--like rotary engines, for example--produce more of certain emissions than others.



See Also:
Fuel Pump
Backpressure
Exhaust Manifold
Carburetor Float
EGR
Idle Speed Screw
Fuel Filter
Automatic Choke

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