AEM 30-71XX Infinity EMS Quick Start Guide User Manual

Page 44

Infinity Quick Start Guide

value.

The Injector Flowrate is very important in determining the fuel requirements. The Infinity ECU
uses actual Injector Flowrate [cc/min] to determine the proper injector pulse width. The
InjFlowRate [cc/min] table is calibrated from the Setup Wizard: Injector Flow, however the table
can be modified manually for unlisted injectors.

Now that the base injector flow rate has been determined, the Infinity ECU applies a few more
compensating factors. Wall Wetting is a function of fuel condensing in the intake manifold at the
injection point. At different rates of change in the MAP [kPa] values, and at different Coolant
Temperatures, fuel enrichment compensations are used to prevent lean and rich conditions
during rapid manifold pressure changes. Note that this table has several different functions. It can
be used for dynamic transients by nature of its “MAP Rate” x-axis. It can also be used for more
steady state compensations by adjusting the values in the “middle band” of the table where MAP
rate changes are very small. Positive numbers in this table will effectively add fuel to enrichen the
mixture. Negative numbers have the opposite effect.

The X and Y axis inputs of the WallWetting table can be set to several different variables. These
settings are found in the Setup Wizard page for Accel and Decel Fuel. Axis selections include:

Map Rate
Throttle Rate
Coolant Temp
MAP [kPa]
EngineSpeed [RPM]