Launch Control EV

[JFM]

Hello, I'm trying to use the built-in Launch Control functions for my electric car, however I understand that this module has been designed for IC cars specifically. Does anyone know or have experience modifying the object so that it is based off of wheel speeds only, rather than fuel trimmings, ingnition timing etc?

[adrian]

If you take out the ICE control parts of the launch control module it is pretty basic. Assuming all you want is a torque request you can achieve the same thing with a table and a few parameters to enter/exit launch.

I haven't really tried, but I think it would be more effort to try and make the built-in module work than it would be to create the functionality yourself.

[raheelfarouk]

I'm actually building an EV package with M1 Build right now that has launch control in it. I would say it's fairly easy to build a custom one if all you want is torque control based on wheel speed.

Screenshot 2023-10-19 222622.png (46.17 KiB) Viewed 1599 times

This is a screenshot from the most basic launch control function I built for the EV package; the Torque Aim table uses 3 axes for us which is Wheel Speed, Launch Switch Position and Tire Temperatures. We then have a Torque Aim function that determines the actual torque request sent to the motor controller, this is just Throttle Pedal% * Launch Torque Aim when the launch switch is turned on.
We then tuned the aim torque when we were on track to find the ideal torque values.

I am also working on slip-ratio based launch control right now so feel free to PM me if you have any questions