AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual User Manual

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Infinity User Manual

Driver
In automotive electronics, refers usually to a transistor circuit that is designed to either source or
sink electrical current

Duty Cycle
In components which cycle on and off at a given frequency, the measurement of the amount of
time the component is on versus the time it is off

Dwell
The amount of time that current is flowing through the primary side of the ignition coil. Dwell
measurements can be expressed in either units of time (usually milliseconds) or crankshaft
degrees.

ECU
Engine Control Unit. Refers to an electrical module that receives inputs from sensors and outputs
signals to actuators on an engine. Can also be referred to as EMS, PEMS, etc.

Emissions
Chemical by-products of combustion; comprised primarily of carbon monoxide (CO),
hydrocarbons (HC) and nitrous oxides (NOX)

Engine Calibration
The values contained in the controller program that are adjustable by the tuner and are used to
control engine operation, primarily fuel and spark requirements

Engine Mapping
A procedure of experimentally determining the performance of an engine at selected operating
points and recording the results

Equivalence Ratio
Actual air/fuel ratio divided by the air/fuel ratio at stoichiometry

Export
To output information or data from one piece of computer software for use in another

Gain
In closed loop control terminology, refers to constants that vary the magnitude of each term in the
manipulated variable calculation or algorithm

Hall Effect Position Sensor
Type of sensor used in all Pro Flo distributors for measuring crankshaft position; outputs a
square wave signal pattern that is either low (ground) or high (reference voltage) depending on
whether or not a tooth is passing near the sensor

Hg
The chemical representation for the element Mercury