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Navigation: MTune Settings > Fuel

Fuel acc enrich

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Fuel acceleration enrichment

 

Enable acceleration enrichment

Event and Time based defines when the added fuel is calculated.

Disabled - No fuel acceleration is used at all.

Enabled (Time based) - Calculates the fuel based on time.

Enabled (Event based) - Calculates the fuel each injector pulse.

Note: Both event and time modes provides the same speed, but event-based calculations provide shorter fuel length at higher RPM to better match the fuel film behavior.

 

Acceleration source

Specifies which engine data value to be used as the acceleration source.

Mechanical Throttle/E-Throttle pedal - Uses the Normally used.

E-Throttle - Uses the actual E-Throttle position as the acceleration source.

E-Throttle target - Uses the target position as the acceleration source.

Note: If using dual E-Throttle, Throttle 1 position or target is used.

 

Hold time

Specifies the amount of time to hold the extra fuel during fuel enrichment when time based enrichment is selected.

 

Hold events

Specifies how many events the acceleration enrichment will be active when the EVENT based enrichment is selected.

 

Decay time

Specifies the time period which the fuel are reduced to zero after acceleration enrichment hold time has surpassed.

 

Decay rate

Specifies the time period which the fuel are reduced to zero after acceleration enrichment hold event has surpassed.

 

Note: After the number of hold events has passed the amount of added/subtracted fuel is decreased each event until it's zero. An "event" is each time fuel is injected for one cylinder.

 

Min TPS rate

Specifies the minimum TPS rate to trigger the acceleration enrichment.

Note: Make sure not to use a to low rate here, to prevent accidental fuel enrichment.

Note: If negative TPS rates is used on the table, the same MIN TPS RATE is used, but on the negative side.

 

 

Fuel acceleration enrichment table

 

Acceleration fuel table

Specifies how much extra fuel to be added from the table. Percent fuel to be added of base fueling.

 

Note: negative TPS rates can also be setup, to be able to take away fuel when going off the throttle.

 

 

Positive and negative TPS rate setup example

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Example how to setup the acceleration table to take away fuel when going off throttle and while still being able to enrich based on positive TPS rate.

 

 

Fuel acceleration enrichment correction

 

Enrichment correction

Corrects the fuel acceleration enrichment from a table.

Note: A cold engine requires more fuel during acceleration than a warm engine, so you will most likely use the Coolant temp as one of the source axis here.