AEM Infinity Supported Applications - Mazda 1986-2002 16B & 20B Rotary - Manual (Page 11)

Infinity Supported Application 11
© 2014 AEM Performance Electronics
Utilizing a 2D table labeled StagedSplit [%], injector flow can be controlled between primary and
secondary injectors. A value of 100% means all flow will go to the primary injectors while 0% means that
all flow will go to the secondary injectors. A value of 50% will split the flow equally to primary and
secondary injectors.
Injector duty cycle is an important variable that also needs to be considered. If the secondary injectors
are larger than the primary injectors (or if the quantity of secondary injectors is not equal to the quantity
of primary injectors), a StagedSplit of 50% may not supply maximum fuel flow from all injectors. In order
to maximize fuel flow, the StagedSplit [%] should result in equal duty cycles at high loads. To calculate
equal duty cycles from both primary and secondary injectors, take the primary injector total flow rate and
divide it by the total injector flow rate.
Example
Primary injectors = Injector Dynamics 1000, quantity = 2
Secondary injectors = Injector Dynamic 2000, quantity = 4
Obtain equal duty cycles with the following equation:
Using the results of the equation above, 20% is put into the high load areas of the StageSplit [%] table to
ensure that neither primary nor secondary injectors becomes saturated. The low load areas of the table
are set to 100% so that only the primary injectors are active. The rest of the table should be populated
so that the secondary injectors phase in before the primary injectors become saturated.