Automotive Glossary of Terms - E -
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Definitions for automotive terms and illustrations from engine control system to exhaust manifold.
EBCM
See Electronic Control Unit (ECU).
ECM
See Electronic Control Unit (ECU).
ENGINE CONTROL SYSTEM
The computer control system that regulates fuel delivery, ignition timing, engine idle speed and on some vehicles the transmission shift points.
ECU
Electronic control unit.
ELECTRODE
Conductor (positive or negative) of electric current.
ELECTROLYTE
A solution of water and sulfuric acid used to activate the battery. Electrolyte is extremely corrosive.
ELECTRONIC ACTUATION SYSTEM
The electronic controls for an anti-lock braking system or electronic suspension system. This unit contains the control computer for the individual system.
ELECTRONIC CONTROL UNIT
A digital computer that controls engine (and sometimes transmission, brake or other car system) functions based on data received from various sensors. Examples used by some manufacturers include Electronic Brake Control Module (EBCM), Engine Control Module (ECM), Powertrain Control Module (PCM) or Vehicle Control Module (VCM).
ELECTRONIC IGNITION
A system in which the timing and firing of the spark plugs is controlled by an electronic control unit, usually called a module. These systems have no points or condenser.ENAMEL
Type of paint that dries to a smooth, glossy finish.
END-PLAY
The measured amount of axial movement in a shaft.
ENGINE
The primary motor or power apparatus of a car, which converts liquid or gas fuel into mechanical energy.
ENGINE BLOCK
The basic engine casting containing the cylinders, the crankshaft main bearings, as well as machined surfaces for the mounting of other components such as the cylinder head, oil pan, transmission, etc..
EP LUBRICANT
EP (extreme pressure) lubricants are specially formulated for use with gears involving heavy loads (transmissions, differentials, etc.).
ETHYL
A substance added to gasoline to improve its resistance to knock, by slowing down the rate of combustion.
ETHYLENE GLYCOL
The base substance of antifreeze.
EXHAUST MANIFOLD
A set of cast passages or pipes which conduct exhaust gases from the engine.
