Edelbrock Pro-Tuner, User Manual

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Appendices 231
Target AFR/EqR Current fueling target, based on the inputs to the ECU model.
The ECU will be adjusting to this value as necessary to based
on this target (from the Target AFR map).
Tau X An advanced transient fuel strategy that calculates and
maintains the Air Fuel Ratio during rapid changes in air
movement or engine load.
TDC Top Dead Center: The reference point where Cylinder #1 is a
the top of the compression stroke.
Throttle Air (Thrtl) Calculated air flow at the throttle body.
Torque The twisting or rotational force on the crankshaft. Used as an
ordinate in the engine model. It has a direct relationship to
horsepower (or kilowatts) based on RPM and gives an
indication of LOAD on the motor.
TPS Throttle Position Sensor: Sensor located on the throttle body
that indicates throttle blade angle, in volts.
Transient Fuel Controlling the air fuel ratio during rapid changes in air volume
or engine load.
Turbocharger A supercharger driven by exhaust gases.
U
USB Universal Serial Bus: A connection and communication
standard used in many PC's and laptops.
V
Virtual Engine
Simulator
Available from the TOOLS menu. This allows you to pulse the
injectors or fire the coil(s) without the engine running. It can
be useful for checking injectors/ignition boxes/coils for proper
operation.
Volumetric Efficiency (VE) : The efficiency of the engine in filling the cylinders with
air on the intake cycle. Example: A typical at idle volumetric
efficiency might be around 30%, which would be represented
as 0.30 in the VE Map. It is possible for VE to exceed 100% (or
1.0 pressure ratio) in supercharged/turbocharged applications
or extreme normally aspirated race engines (due to intake
manifold design to take advantage of harmonics and high
speed air sources)
W
Waste Spark Waste Spark refers to firing a the coil (or coils) for two
cylinders at the same time, one on the power stroke and the
other on the exhaust stroke (thus "wasting" the exhaust stroke
spark).
X
Y
Z