<insert tutorial here on what maps to alter to get to a stage 1, info from ecuproject and tuning wizard>

 

Hope to spread some light to the tuning of T7 bins. When tuning and comparing the different files look at these maps(better descriptions to be added, please help making them better by posting comments!):

 

Note: Divide airmass (mg/c) by 3,1 for aprox torque to petrol, 2,9 for E85. Ignition, airtemp etc influates this so just use it as a pointer!

 

Start off with the pedalmap(PedalMapCal.m_RequestMap), this is where you demand how much air you want. A standard B205E/L file would look like this with pedal movement on y axis(0-100%) AND rpm on the x axis:

 

 

 

This map will give no more than 1000mg/c as the max requested value and the pedalresponse will be very linear throughout the rpm range.

To start off let's higher the top row to 1100mg/c so we have some room to work with. This would correspond to ~350nm with petrol and ~375 with E85.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TorqueCal.m_PedYSP

Air mass supportpoints for (Calc) X_AccPedalMap. Resolution is 1 mg/combustion.

Top value shall be the same as the top value in the PedalMap above.

 

FCutCal.m_AirInletLimit

If the "MAF.m_AirInletFuel" is higher than this limit during m_AirInletTime will the fuelcut be activated ( pressure guard ).

Here we need to set the max intended mg/c + some extra margin in case of an overshot, +200mg/c should be enough so 1300mg/c in this case

 

BstKnkCal.MaxAirmass

Map for max allowed airmass for manual gearbox, m_nHigh. Resolution is 1 mg/c.

This is the first of the limiters that will be applied to the pedalmap, the column marked with 0 on the X axis is the max allowed airmass when no ignition retard is in place. Set +10mg/c above the intended aimass.

Second value from the right shall be slightly lower than the intended as we want to reduce airmass in case of knock, third, foruth etc shall be even lower as these indicate even more ignition retart/knock,

 

Knock limitation

Knock control first retards the ignition timing for each cylinder. If the mean value for the ignition retardation for all the cylinder exceeds a certain value, fuel enrichment will take place.

If the mean value for ignition retardation increases further, the maximum permissible air mass/combustion will be reduced with the values in the BstKnkCal.MaxAirmass maps. X axis represents degree of ignition retard.

This reduction takes place continuously as the ignition retardation increases.

The value constitutes the maximum air mass/combustion value permitted by knock control.

Note

Knock control on modern engines is not a safety function but a normal function. Consequently, it is considered normal when knock control reduces engine torque in certain cases. The engine knock control increases for e.g. high intake air temperatures or high coolant temperatures. Further influencing factors are driving at high altitudes and low octane fuel.

Certain engine variants require petrol with an octane rating of 98 RON in order to provide the specified engine torque/power.

BstKnkCal.MaxAirmassAu

Map for max allowed airmass for automatic gearbox, m_nHigh. Resolution is 1 mg/c.

See text above

 

AirCtrlCal.m_MaxAirTab

Airmass value from controller where area map has reached max-area and there is no point to increase the I-part. Resolution is 1 mg/c.

If this map has got a lower value than your intended mg/c go ahead and set the same max value.

AirCtrlCal.m_MaxAirE85Ta ( if running on E85 )

Same as above for E85

 

BoostCal.RegMap

Main constant matrix. Resolution is 0.1 %.

 IgnE85Cal.fi_AbsMap ( if you want to change the ignition )

Ignition map for E85 fuel. Resolution is 0.1 °.

IgnNormCal.Map ( if you want to change the ignition )

Normal ignition map. Resolution is 0.1 °.

MapChkCal.CheckSum (automaticly updated in between every mapchange with T7suite!)

MaxVehicCal.v_MaxSpeed( max speed )

TorqueCal.M_ManGearLim

Maximum engine torque limit for each gear in the manual gearbox. Resolution is 1 Nm.

Manual gearbox, engine torque limitation

The maximum engine torque must be limited at low gear ratios for reasons of strength.

The control module calculates the engaged gear by comparing engine speed with vehicle speed.

If the gear ratio corresponds with gear 1 or R, the control module reads bus information "Reverse gear selected" from DICE to distinguish between them.

Engine torque is limited to:

Gear 1 or R is limited to 230 Nm on engine alternative B205E/B235E. Engine torque is limited to 350 Nm in other gears.

On engine alternative B235E, gear 5 is gradually limited if the engine speed is below 2400 rpm. This is to avoid vibration.

On engine alternative B235R, gear 1 is limited to 280 Nm and reverse gear, R, is limited to 230 Nm. Torque limitation in gears 2-5 is 380 Nm.

The engine torque value is converted to mg air/combustion and constitutes the maximum air mass/combustion allowed by the gearbox.

TorqueCal.m_AirTorqMap This is where all torque limiters take their data from and therefor needs to be "fooled" if you are running 400nm+ or an automatic. 4sp automatic need the last row to be max 330nm, 5sp 350nm, as this is what the gearbox ECU is requesting as a max limit.

Data-matrix for nominal airmass. Engine speed and torque are used as support points. The value in the matrix + friction airmass (idle airmass) will create the pointed torque at the pointed engine speed. Resolution is 1 mg/c.

axis to the above map: TorqueCal.m_AirXSP

TorqueCal.M_EngMaxTab

Data-table for maximum engine out put torque for manual cars. Resolution is 1 Nm.

TorqueCal.M_EngMaxAutTab

Data-table for maximum engine out put torque for automatic cars. Resolution is 1 Nm.

TCM, engine torque limitation

The maximum engine torque must be limited in gear R, 1 and 2 for reasons of strength. TCM will send continuous bus information specifying the maximum permissible engine torque.

The maximum permitted engine torque is also limited during gear changing.

TCM sends maximum permissible engine speed:

R

270 Nm

1

330 Nm

2

330 Nm

3

330 Nm

4

350 Nm

5

350 Nm

TCM then sends maximum permissible engine torque to protect the gearbox.

Trionic T7 converts Nm to mg air/combustion with help of the Airtorque map. The value constitutes the maximum air mass/combustion permitted by the automatic transmission and it is therefor we currently need to trick T7 to think more airmass is still the same nm.

TorqueCal.M_5GearLimTab

Data-table for maximum engine out put torque for manual cars on fifth gear. Resolution is 1 Nm.

TorqueCal.M_EngMaxE85Tab ( if running on E85 )

Data-table for maximum engine out put torque when running on E85. Resolution is 1 Nm.