Dual Fuel Tables allow the ECU to be tuned for two completely different tuning strategies which may require switched or interpolated tables. If switching Fuel tables is not required, Fuel Table 2 can be configured as another overlay table, this allows up to 6 dimensions (6D) of user defined fuel tuning (refer to 4D/5D tables). A common use of Dual Fuel Tables is when running two different octane fuels or two different engine setups. Dual Fuel tables may be used in conjunction with dual Ignition and boost tables to completely cater for the different requirements of the two setups.
Dual Fuel Table Settings:
Controls how the Dual Fuel Table function is used, the following options are available:
·OFF - The table is not used.
·Dual Table - Allows the main Fuel Table to be switched based on the state of an input. The Table Activation setting selects the switching source for the Dual Fuel Table. The table currently being used by the ECU can be determined by viewing the Fuel Table 1 and Fuel Table 2 statuses on the Fuel tab of the runtime values window (F12 key).
·Overlay Table - The table behaves as an overlay table the same as the 4D and 5D Fuel Tables. As Fuel Table 2 is larger than the 4D and 5D tables it is the preferred table for fuel overlay tuning (if switchable fuel maps are not required).
·Interpolate Between - When using this option the Fuel Table Ratio Table appears. The Fuel Table Ratio Table is used to control the interpolation between Fuel Table 1 and Fuel Table 2. The x (horizontal) axis of the Fuel Table Ratio Table is configurable, commonly used parameters include % Ethanol, Multi Fuel Blend Ratio, or an An Volt channel.
Used to configure which input or output is used to activate Fuel Table 2. This setting is only available when Dual Table Mode is set to Dual Table or Overlay Table.
The alternative main fuel table that will be used when the Table Activation condition is met.
Controls how much influence Ignition Table 1 and Ignition Table 2 will have upon the current ignition angle. A value of 0.0 would mean that all the influence comes from Fuel Table 1, a value of 100.0 would mean all the influence comes from Fuel Table 2, while a value of 50.0 in the table would mean that the influence is split evenly between the two ignition tables.
The axis on this 2D table can be configured by the tuner. Commonly used parameters include % Ethanol, Multi Fuel Blend Ratio, or an An Volt channel.