Formula e | Energy Regeneration Question

W

WadeOhh

Registered
Hi all,

I have only really found the basics of what the 2 energy regeneration tools (the eMotor Torque Map on increment/decrement mixture and the Regen Mode on engine brake map up/down) in the Formula e car actually do. I read the energize guide, but it doesn't really go into detail of exactly what they accomplish and what they do to the car.

I wanted to find out in more detail what the 2 do in regards to what they accomplish, what they do to car behaviour, the trade offs, in which scenarios you'd use one over the other, roughly how much the different settings affect lap times (if known), even which is the 'high' and 'low' settings, eg: is '1' max charge or is '10' max charge (I always get a bit confused by number based settings). Basically I want to find out as much detail as possible.

I realise I could find out through testing, but I'd really like to see a proper description. Any help would be much appreciated. Thanks!
 
@SPASKIS I would suspect there aren't any new telemetry values to read. Maybe some of the existing systems/values are utilised in a different way, but if there are any new ones I doubt they've made it into the plugin interface as it tends to lag behind at the best of times.

In addition, you can only track engine mixture and brake map by knowing what the car started with (via the temporary setup file created when you get in the car), keeping count of the up/down presses, and knowing how many values the car has. I've done it for a league mod, but it's not feasible with unknown (to the plugin) mods.

Anyway, I haven't bought any DLC and modding/plugin support evidently isn't a focus for S397 (at the moment, at least).
 
Yes, I don't think engine mixture/regen are visible via internals, but some side effects of those changes can be tracked by monitoring mFuel, which now represents % of the charge. This value goes up and down (due to regeneration). So, I imagine doing laps with settings A and B and comparing mFuel readings might reveal interesting stuff.
 
Ricardo said:
Formula E Power, Regen, etc Explained - This is from a Talk and Drive video. Marcel Offermans explains how these systems operate in the game.
Click to expand...

Thanks for this @Ricardo. The talk and drive pretty much explained what I was looking for, well, the top level stuff I wanted to know. Some testing will be needed to know exact numbers on difference in lap times at the different settings, braking distances at the different settings, etc.

For anyone looking at this thread looking for info, here are the basics

eMotor Torque Map on the increment/decrement mixture buttons: This is basically your engine output. The higher the number setting, the more power you'll output, the faster you'll go. The trade off however (obviously), is that this comes at the expense of battery life. The higher the number, the faster you go, but the more battery you'll use.

Regen Mode on the engine brake map up/down buttons: This is the amount of power you put back into the battery off throttle. I downloaded a 3rd party plugin to see what effect this had on the rate recovered and from the numbers I saw, this energy seems to go back into the battery at the same rate when you are off the throttle or braking. Braking itself doesn't seem to increase the rate recovered. (IE: when you are coasting with no brake, or on the brake hard, the rate that the energy is going back into the battery is the same. Hope this makes sense). The higher the setting, the more energy you'll recover, however, this is at the expense of braking efficiency/effectiveness. The higher the number, the more energy you'll recover off throttle, but the longer your braking distances will be. Lower the number, the better you'll brake, but less energy will be put back into the battery.

Hopefully this helps someone (like myself) looking for this info in the future :)
 
Goanna said:
What 3rd party plugin did you download?
Click to expand...

V-HUD. It's on RaceDepartment. It's a really good customisable HUD much like Assetto Corsa. Many widgets that you can toggle off and on and a fuel/battery reading down to the 0.XX and also features a much more accurate 'fuel laps remaining' calculator than the stock HUD. Also, you can move the HUD items around much like Assetto (for Fe, I've put Fuel/battery just above the steering wheel).
Hope this helps ☺️
 
So, does rF2 now incorporate energy harvesting?
Would seem silly to make a F-E mod and not have harvesting. Even more so since it isnt free. :p

This will make next years F1 mod 100% accurate, so if this is the case then Im stoked.
 
WadeOhh said:
numbers I saw, this energy seems to go back into the battery at the same rate when you are off the throttle or braking
Click to expand...
I am curious, what is the source of energy that's being put back, if it's coming back even without braking? Or, is it simplification in rF2 itself?
 
The Iron Wolf said:
I am curious, what is the source of energy that's being put back, if it's coming back even without braking? Or, is it simplification in rF2 itself?
Click to expand...
To run an electric motor, you add energy. Stop adding energy and the electric motor turns into a generator as long as it is spinning, thus the kinetic energy of a car coasting in gear is generating electricity rather than consuming it.

In a big industrial plant, with lots of air handlers and shop motors, the electrical designer has to size the circuit breakers to account for loss of electricity as all those motors suddenly start producing energy!
 
Stupid question does the AI use Lift and Coast or do they drive full throttle until they are out of energy?
 
The Iron Wolf said:
I am curious, what is the source of energy that's being put back, if it's coming back even without braking? Or, is it simplification in rF2 itself?
Click to expand...

Basically it's just like engine braking, but technically it's like a headlight dynamo on a pushbike. Don't know what they're like these days with LEDs, but that dynamo used to introduce a fair amount of resistance...
 
Charmin said:
Stupid question does the AI use Lift and Coast or do they drive full throttle until they are out of energy?
Click to expand...

Not a stupid question :) Sadly, they just go full peg, so in a 23 lap race (which is a good lap to target without a stop for the player), they will stop once and if you do a full race distance (43 or 45 lap race) they will stop twice.

I hear they are working on this potentially for future updates.
 
WadeOhh said:
Not a stupid question :) Sadly, they just go full peg, so in a 23 lap race (which is a good lap to target without a stop for the player), they will stop once and if you do a full race distance (43 or 45 lap race) they will stop twice.

I hear they are working on this potentially for future updates.
Click to expand...
Thanks for the awnser, good to know, thought i m just to slow in race mode. Would be cool to make it possible that the AI use Lift and Coast, an other question, what about the power? I have the feeling the also use 200kw.
 
Charmin said:
Thanks for the awnser, good to know, thought i m just to slow in race mode. Would be cool to make it possible that the AI use Lift and Coast, an other question, what about the power? I have the feeling the also use 200kw.
Click to expand...
They use 180kw. Because I use 200 and I'm faster than they are on the straights. Plus, doesn't the AI always use the default setup?
 
So I'm grappling with Formula E and the power train settings. The native wheel in the FE car on the top right hand side has 3 settings:

Trq Map - What is this?? I haven't found a setting for it.
Brk Map - This is the Regen setting from 0 - 9, but I can't really ascertain any difference between the settings.
Eng Map - This is engine power and goes from something like 120kw up to qualifying 250kw

The real cars have regen paddles to apply regen but I can't find an analogue control to set it or use it. This seems to be missing. Some wheels have analogue paddles on the wheel as well as digital shifters eg APM on Fanatec wheels.

Also, lap delta need to be in the centre bottom box. And showing in Red/Green during lap. If need be instead of last lap, but there is lots of wasted real estate, so should be room for it. It is in the game as SimHub dashes can display it.
Plus N is huge - lots of space for the other items on the real wheel that are missing - vBatt and the green box next to N.


rF2FEsteering wheel.jpg


FEsteering wheel2.jpg
 
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