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

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Infinity User Manual

Open Loop Fuel Control
Method of controlling fuel flow without modification from a feedback variable such as oxygen
content

Outing
In data analysis software, refers to a complete set of data

Parallel Circuit
Contains two or more circuit elements that have the same voltage measured across each

Peak and Hold Driver
A driver that uses two levels of current to operate the injector. The driver circuit applies battery
voltage to the injector until a predetermined current level is reached. The current is then reduced
and held at a lower level for the duration of the PW. This type of driver is normally used with
injectors having low resistance coils (typically around 2 ohm). The accuracy of the driver peak
current level (Ip) and the hold current level (Ih) is held to ±0.50%.

Permanent Power
Sometimes referred to as "Perm" power. This is uninterrupted battery power, typically a direct
connection to the battery positive terminal.

Pickup
Term that sometimes refers to frequency measurement sensors such as crank or cam position

Pigtail
One or more wires terminated only on one end. Sometimes specialized automotive connectors
are supplied with a short piece of wire installed in each cavity. Can be spliced into an existing
harness.

Pinout
Refers to the description of each circuit or pin on a connector

Power
Power is the rate at which work is done. It is the product of torque and angular speed.

psi
Abbreviation for pounds per square inch, a unit of pressure measurement

psia
Abbreviation for pounds per square inch absolute; a unit of pressure measurement relative to a
perfect vacuum

RS232
A common standard used in serial communication between a PC and an engine controller

RXD
Abbreviation for Receive Data