Fuel
This section contains setup information for fuel configuration, including number of stages, injection mode, tuning method, and table selection.
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Fuel
Tuning Method
The method used by the system to calculate the amount of fuel to be injected. This will change the shape and use of the Fuel Base table so it must be selected before tuning commences. (Default = Volumetric Efficiency).
Volumetric Efficiency
Often referred to as VE. It is selected when the Volumetric Efficiency calculation is to be used for Fuel Base table. This will take into account the number of cylinders, engine displacement, engine load, air temperature, and the injector flow characteristics. The Fuel Base table values will reflect engine efficiency. The final calculation fuel amount will also take into account the Target Lambda table.
Mass Air Flow
Selected when you want to tune with a Mass Air Flow Sensor. The Fuel Base table will be a correction multiplier to the Mass Air Flow calibration curve and tuning will begin with 1.000 for all values. A value of 1.010 will add 1% fuel, a value of 0.990 will reduce fuel by 1%.
Injection Time
Selected when a raw amount of injection time is to be entered into the Fuel Base Table. Fuel Base table values will be in injection time.
Auto V.E. Air Temp Compensation
Selected when you would like the VE calculation to automatically predict the change in fuel required by the engine with varying inlet air temperatures. When enabled, this table should initially be set to “0.0%” for all table values. It will then be used as a correction to the automatic calculation and not a raw percentage correction with air temperature. (Default = Disabled)
Fuel Type
(Default = Petrol)
Ethanol
Selected when pure ethanol E-100 is the fuel being used.
Ethanol Petrol Blend
Selected when a blend of ethanol and petrol - such as E85 - is the fuel being used
Flex Fuel
Selected when a fuel composition sensor is being used to detect ethanol percentage. Selecting this will automatically add a fuel correction with varying ethanol percentage in the fuel. A Fuel Composition Scalar table is then available to vary how this correction is applied. A Primary Fuel Density table will now be present in the Fuel table list.
Methanol
Selected when methanol is the fuel being used.
Petrol
Selected when regular petrol/gasoline is the fuel being used. A Primary Fuel Density table will be now present in the Fuel table list.
Fuel Load Type
The sensor type that will be used as primary load input for the fuel calculation. This is the sensor that is used whenever Fuel-Load is the axis used for a table such as with correction tables. (Default = MAP Sensor)
MAP Sensor
Selected when a MAP sensor is the primary load sensor used for fuel calculation.
Air Mass/Cyl
Selected when a Mass Air Flow Sensor is the primary load sensor being used for fuel calculation.
Throttle Position Sensor
Selected when a Throttle Position Sensor is the primary load sensor being used for fuel calculation. When selected with VE as the Tuning Method, a MAP sensor or a Barometric Pressure Sensor is also required. The MAP sensor is used as a secondary load sensor for vacuum and/or boost. A Barometric Sensor is used for barometric or altitude correction. (See Fuel MAP Correction table)
Engine Pressure Ratio
Selected when both MAP Sensor and an Exhaust MAP Sensor is being used, and the Engine Pressure Ratio Function is enabled.
Fuel Pressure Input Type
Used only when a Fuel Pressure Sensor is connected to your Elite ECU. (Default = MAP Reference)
MAP Reference
This is for a fuel system where a vacuum-boost reference is connected to the fuel pressure regulator and fuel pressure rises and falls with manifold pressure creating a constant pressure difference across the injector. The system will add vacuum/boost to the Base Fuel Pressure to obtain the estimated fuel pressure.
Constant
This is for a fuel system where there is no vacuum-boost referenced regulator and fuel pressure is fixed to a constant pressure. This is common with non-returning fuel systems. The system will not add vacuum/boost to obtain the estimated fuel pressure. It will only use the fixed Base Fuel Pressure.
Base Fuel Pressure
This should be set as the fuel pressure that the system uses when the fuel pump is running but the engine is not running.
Changing this setting does not impact the fuel tuning in any way. It is only used as a detection point for Engine Protection if a Fuel Pressure Sensor is installed. To change the fuel output with pressure the Injector Flow table should be mapped against Injector Pressure Differential.
Enable Flood Clear Mode
Enabling this function will cause the ECU to disable the injector outputs when the Engine RPM is below the Max Cranking RPM and Throttle Position is above the Throttle Limits User Demand Maximum values. This can help to clear a flooded engine. When either the Max Cranking RPM is exceeded or the Throttle Position is less than the User Max Demand normal fuel injector output will resume. When enabled the Ignition Lock Mode has the option to be in use during Flood Clear conditions. (Default = Ticked)
Injection System
Disable Injectors
Enabling this will disable all injector outputs. (Default = Disabled)
Enable Per Injector Setup
Enabling this will enable per-injector tables and configuration for the flow rate, dead time, and current control. (Default = Disabled)
Number of Stages
The number of separate fuel injector stages that are to be used.
Injector Timing Method
The method which timing is measured - either End of Injection or Start of Injection.
Maximum Stage Duty Cycle
The injector duty cycle which when exceeded will cause the next stage of injectors to begin operation..
Minimum Stage Duty Cycle
Below this value of injector duty cycle the highest running Stage Number will disable. If the ECU determines that this will cause the previous Stage to exceed the Maximum Stage Duty Cycle, the system will not disable the current stage until this condition is met.
Eg. If disabling Stage 2 causes Stage 1 to exceed the Maximum Stage Duty Cycle, the system will prevent this from occurring by holding off from disabling the highest Stage Number until this condition is met.
Staging Set Up
Stages (1 - 4)
Configuration for each of the enabled stages.
# Of Injector Outputs
The number of injector outputs used for each stage number.
Injection Mode
The injection delivery method for each stage. (Default = Sequential)
Sequential
Each injector output fires once per engine cycle in sequence and typically one output per cylinder. This setting requires a Trigger Type that supports full engine cycle synchronisation, typically with a crank and a cam position sensor. Injection is timed with 720 degree crank position.
Semi-Sequential
Injectors are fired in groups. This setting requires a Trigger Type that supports crank-only position (eg. missing tooth triggers with no cam position sensor). Injection is timed with 360 degree crank position.
Multi-Point
All injector outputs are fired together. This setting only requires a Trigger Type with one trigger per spark event. Enabling this setting in turn enables the Injections Per Cycle setting.
Batch
Injector outputs are divided into two groups which are fired alternately. This setting only requires a Trigger Type with one trigger per spark event. Enabling this setting in turn enables the Injections Per Cycle setting.
Injector Configuration
Configures how the fuel is distributed in the intake. (Default = Per Cylinder)
Per Cylinder
Each injector output supplies fuel to one cylinder. Eg. the injectors are in each runner for one cylinder and cannot supply fuel to another cylinder. This allows per-cylinder corrections for fuel.
Injections Per Cycle
The number of injections per injector output for the full 720 degree engine cycle. (Default = 1)
Fuel Tables
When in doubt as to the use and function of these tables it is good practice to revert to the default table values. These values are typical of those that most engines will use and the table shapes reflect how most tuned tables will appear and as such are a good starting point to begin your tuning process.
Overall Correction
Allows a final overall percentage change of fuel to be added or subtracted after all other fuel amount calculations have been performed. This is a single number adjustment only, not a 2D or 3D table. (Default = Enabled)
Prime Pulse
The first pulse of fuel supplied when the trigger system has obtained full synchronisation. Up to 3D mapping is available with this table. When VE or Mass Air Flow is the tuning method this will be a VE style value. When Injection Time is the tuning method this table will use raw Injection Time values. (Default = Enabled)
Cranking Fuel Amount
The amount of fuel to be delivered after the Prime Pulse has occurred but the engine RPM is still below the Max Cranking RPM value. Up to 3D mapping is available with this table. When VE or Mass Air Flow is the tuning method this will be a VE style value. When Injection Time is the tuning method this table will use raw Injection Time values. (Default = Enabled)
Zero Demand Fuel Amount
This table is only active when the Throttle Position for a cable throttle or the Accelerator Pedal Position for a DBW throttle is below the Throttle Limits – User Demand Minimum value. Up to 2D mapping is available with this table. When VE or Mass Air Flow is the tuning method this will be a VE style value. When Injection Time is the tuning method this table will use raw Injection Time values. When using VE or Mass Air Flow and this table is enabled it will activate the MAP Reference At Zero Demand setting. (Default = Disabled)
Coolant Temp Correction
The percentage amount of fuel to added for changes in Coolant Temperature. Typically used to correct for fuel requirements for cold engine running. Up to 3D mapping is available with this table. (Default = Enabled)
Air Temp Correction
The percentage amount of fuel to added for changes in Air Temperature. Up to 3D mapping is available with this table. When Auto VE Air Temp Compensation is selected this table this table should initially be set to “0.0%” for all table values as there is an automatic compensation being applied by the VE calculation. It will then be used as a correction to the automatic calculation should it not be ideal. When Auto VE Air Temp Compensation is not enabled the values in this table will need to be manually adjusted and the table is a raw correction percentage. (Default = Enabled)
MAP Correction
The percentage correction table for changes in Manifold Pressure. Up to 3D mapping is available with this table. When the Tuning Method is set to VE and when the load source is TPS, the Manifold Pressure is automatically corrected for, as part of the VE fuel calculation. In this case, the table should initially be set with all values at 0% (default). The table is then used as a correction for any error in the automatic calculation. When the Tuning Method is set to Injection Time, there is no VE calculation auto correction, and all values need to reflect a raw correction with changing Manifold Pressure. This table should not be enabled when you are already tuning with MAP as your load source. (Default = Disabled)
Barometric Pressure Correction
The percentage correction table for changes in Barometric Pressure. Up to 2D mapping is available with this table. (Default = Disabled)
Post Start Correction
A percentage enrichment table that is in use after the Engine RPM has exceeded the Max Cranking RPM value, and should be set to decay to 0% correction after the engine has been running for a certain amount of time. This is used to compensate for fuel that is lost to the port wall and valve rather than making it to combustion during initial startup. Up to 3D mapping is available with this table. (Default = Enabled)
Cylinder Correction
A percentage correction for each cylinder. This option is only available if the Trigger type and injector configuration allow Sequential operation with Per Cylinder control. Enabling this option will give the user access to individual tables for each cylinder. Up to 3D mapping can be used with these tables. (Default = Disabled)
Gear Correction
A percentage correction for each Gear that can be selected. This option is only available when a Gear Position Sensor has been enabled. Up to 4D mapping is available with this table. (Default = Disabled)
Generic Correction (1 - 4)
A percentage correction table that is completely user definable. Up to 3D mapping is available with these tables, along with specific conditions to enable the table. Enabling one of these tables will open the Fuel – Generic Correction tab where the settings can be accessed. (Default = Disabled)
Fuel Comp Correction
A percentage correction table that allows for adjustment of the flex fuel composition calculation when the calculation is not as expected. Only used when a Flex Fuel Composition Sensor is connected. (Default = Disabled)
Fuel – Generic Correction Tab
Appears after Enabling one of the Fuel Generic tables.
Custom Name
A name that is to be used for this table. This name can be used when searching for channels throughout the system.
Conditions Enable
Selected if you want to enable or disable the Fuel Generic Correction table with a certain condition.
Number Of Conditions
Selects the number of conditions, up to 3, that can be used to enable or disable the Fuel Generic Correction table.
Select Channel
Allow selection of the ECU channel to be used
Maths
A selection of Equal To, Not Equal To, Greater Than, Less Than, Greater Than Or Equal To, Less Than Or Equal To that is to be used.
Value
The value the maths must meet
And/Or
Allows conditions to be combined so that multiple conditions must be met to enable or disable the Fuel Generic Correction Table.
Fuel Zero Demand Table
MAP Reference At Zero Demand
Sets an engine load to be used as a baseline for the fuel calculation, in the same method as VE. Not used when Injection Time is the Tuning Method.
Lambda Tables
Generic Correction
Opens a percentage correction table that is completely user definable. Up to 3D mapping is available with these tables, along with specific conditions to enable the table. Enabling one of these tables will open the Lambda – Generic Correction tab where the settings can be accessed.
Fuel Comp Correction
Opens a percentage correction table that allows for adjustment of the flex fuel composition calculation when the calculation is not as expected. Only used when a Flex Fuel Composition Sensor is connected. (Default = Disabled)
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