Glossary “aftermarket repair manuals” Definition:
Books published by publishing companies rather than the manufcturer. They may not be as detailed, but can give enough information to complete minor repairs.
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afterrunning
Glossary “afterrunning” Definition:
Term often used when an engine continues to run after the ignition has been turned off. Most often referred to as dieseling.
afterburner
Glossary “afterburner” Definition:
Type of engine exhaust manifold that burns any HC and CO remaining in the exhaust gas.
aftercooler
Glossary “aftercooler” Definition:
An intercooler that reduces the temperature of the compressed air discharged from a turbocharger or supercharger. Also called a charge air cooler (CAC) or a intercooler.
aftermarket
Glossary “aftermarket” Definition:
Parts and equipment sold to consumers after the vehicle has been manufactured. Includes: equipment and parts that are sold by catalog, dealers, independent garages, and parts outlets that are independent from the vehicle manufacturers.
aftermarket parts
Glossary “aftermarket parts” Definition:
May or may not meet OEM specification for fit, finish, durablity, quality, or dimension.
AFCM
Glossary “AFCM” Definition:
Alternative Fuel Control Module
AFR
Glossary “AFR” Definition:
Acronym for Air/Fuel Ratio.
AFS
Glossary “AFS” Definition:
Air Flow Sensor
after top dead center (ATDC)
Glossary “after top dead center (ATDC)” Definition:
The position of a piston as it begins its intake or power stroke (downward).
afterboil
Glossary “afterboil” Definition:
Boiling of fuel in the carburetor or coolant in the engine immediately after the engine has been stopped.
aerodynamic force
Glossary “aerodynamic force” Definition:
A force created aerodynamically, such as by an air foil.
aerodynamic resistance
Glossary “aerodynamic resistance” Definition:
Resistance of the air against an object, such as a vehicle, trying to pass through it. The result of four factors; coefficient of drag, frontal area, vehicle speed, and air density. Also referred to as air drag, air resistance, and aerodynamic drag.
AES
Glossary “AES” Definition:
Acronym for Automotive Electronics Services, or Authorized Emission Specialist.
AESMC
Glossary “AESMC” Definition:
Acronym for Automotive Exhaust Systems Manufacturing Council.
AFC
Glossary “AFC” Definition:
Air Flow Controlled
aerodynamic
Glossary “aerodynamic” Definition:
Ease with which air can flow over the vehicle during higher speed operation. An aerodynamically sound vehicle has very little wind resistance.
aerodynamic drag
Glossary “aerodynamic drag” Definition:
Resistance of air against an object, such as an automobile, trying to pass through it. Also referred to as air drag and air resistance.
aerobic sealant
Glossary “aerobic sealant” Definition:
Sealant that cure in the presence of air.
aerobic sealer
Glossary “aerobic sealer” Definition:
Silicone rubber sealing compound that requires oxygen for curing, such as RTV, used to hold parts together.