Dbw idle air control – AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual User Manual
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© 2014 AEM Performance Electronics
Infinity User Manual
DBW Idle Air Control
Tuning idle with a DBW-equipped vehicle will feel very similar to tuning idle with traditional idle
airflow valves; the standard tables like IdleTargetTable [RPM], IdleBasePosition, and
Idle_Decel should be used as usual.
The drive-by-wire system uses the throttle to manage airflow, including idle airflow, to the engine.
For managing idle airflow control, the ECU rescales the 0-100% Idle Position value calculated
by the ECU's idle functions into a smaller value 'DBW_IdleTrim [%],' which is one of the factors
involved in the DBW_Target [%] calculation.
The value for DBW Idle Control Range sets the maximum allowed throttle to be used for idle
airflow adjustment, when the calculated value for Idle Position is 100%. If the DBW throttle body
is relatively large compared to the engine's airflow requirements, it may be helpful to decrease
DBW Idle Control Range to smaller values such as 5% so the idle function and idle feedback
values have less of an effect on engine airflow.
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