Boost control e-wastegate

EMU PRO
1

Hi
having some fun with boost control, boost is higher than expected pressure. running turbosmart egate with blackbox, also have a laptop mounted just to see how wastegate works and it opens but too late to control pressure, if I set gate to be open 100% with turbosmart program pressure does not go above 130kpa. have tried different values ​​in target base map and in activation base map tried md 10 and 85% have also tried with different values ​​in margin target, at the attached log is with 2 different changes
2025_0403_1709.emuprolog boost control problem.emuprolog (1.1 MB)
rallyegolf pro 3-4-25.emupro .emupro (29.4 KB)

2

Looks like you need to invert PWM.

You have 0% as the control, and the boost doesn’t stop increasing.
I would assume the gate is closed when you have control of 0%.

3

skærm print boost controle
skærm print boost controle1920×1080 203 KB

Is this what you’re thinking, because I’ve tried with 15% and it’s the same result

4

in the log there are 2 pulse 1 with 85% and 1 with 15%

5

You must check the log to see the actual duty cycle on the output.

Every run has a 10% duty cycle when building a boost.

obraz
obraz1722×614 61.2 KB

  1. The actuator duty cycle is 10%.
  2. The actuator DC is calculated from the control value, which is 0%.
  3. Control is 0% because the boost state is “Above pressure max”.
  4. Boost pressure at that point is 111 kPa g.
  5. Maximum boost pressure is set to 80 kPa g. Above that control value is set to 0% to open the wastegate fully.

You can’t just swap values in the base table to invert PWM because the boost logic assumes control 0% is the gate fully open and control 100% is the gate fully closed.

You have to enable the “Invert output” option for the actuator.

obraz
obraz373×151 3.65 KB

6

boost max target
boost max target1920×1080 178 KB

Is it intended that max target is the boost pressure you want to drive with? I expected that, so I set it to 80kpa g to see what boost did?

7

That is not a target.
It’s not in the target category.
You are mixing things.

This parameter is under “Control / Pressure / Activation”.
That means it’s a control activation threshold.
“Max” value is the maximum allowed boost pressure.
Boost controller will always fully open the wastegate when boost pressure is above that value.
You should set it above the maximum boost pressure you are going to be running.

8

okay what values ​​would you suggest I set if I want a pressure of 250 kpa, if you would like, please show it in a screenshot