Reference consumption decreases and increases depending on speed
Calculation of the reference consumption linked automatically by data from my car (Tesla Y LR) change a lot if driving slow or fast. The reference consumption should be what you write a theoretically consumption at 110km/h on a horizontal road with no wind and no rain.
It should not increase if you drive fast for some time. It should not decrease if you drive slow for some time. Your calculation is not correct due to the fact that the reference consumption change a lot - more than 25%. The only way I can use ABRP is not to use the automatically linked reference consumption as it is wrong. Please have your math revised.
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Comments8
Bo (ABRP)
Feb 3, 2025
Thanks for feedback, your understanding of the reference consumption is correct - it should stay the same. Are you possibly driving at autobahn speeds when you are driving fast? We have observed that vehicles at very high speeds consume a lot more than the model assumes and this will the screw up the ref consumption.
Michael Juhl Føns
Feb 3, 2025
Yes at 130-150 km/h the reference consumption will be WAY of. You have all the data (look at the same car driving at different speeds at constant weather and altitudes) and it should be easy correct your model. Your mathematical model you use now must be wrong. It could great to be informed when you have corrected it and I will use it again. Today I enter the consumption manually.
Bo (ABRP)
Feb 4, 2025
We have found an autobahn drive of yours and re-run the calibration on that data, and it shows a good calibration ref_cons of ~190 Wh/km - but that drive started with a very high ref cons of around 270 Wh/km which looks very odd.
While inspecting the data we notice that the DC charging sessions are often not registered as charging at all with Tesla streaming, so this seems to be a general issue which could impact calibration. We will investigate and get back to you!
Michael Juhl Føns
Feb 4, 2025
I will recommend to look into my drives from Italy to Denmark 1th February 2025. Even your reference consumption 190 is too high. I used 172 and that even estimated a shorter distance than the actual drive. Your are welcome to check the whole tour with all data. It was with no rain and nearly no wind for whole tour. Winter tires was installed.
Bo (ABRP)
Feb 5, 2025
Thank you, we will further check your data.
Bo (ABRP)
Feb 5, 2025
I see a gigant step in ref consumption after your charge stop in Bispingen - and this is due to the bug I mentioned above on detecting that you were charging. Basically we thought you were consuming enormous amounts of power while standing still :) This bug has now been fixed.
Remaining issue is that on Danish highways your ref cons is about 170 and at higher speeds on Autobahns it is around 190. This is probably due to the higher speeds being outside of what Tesla optimized for so higher temperatures, more cooling losses etc which we don’t account correctly for. We will look into that too.
Katya S.
Jan 28, 2025
Hi @Michael Juhl Føns,
Since these are two different issues I’ve separated point two in;
Rainy weather increases reference consumption
Reference consumption is impacted by driving style, such as driving slightly faster (or slower) than the speed limit, thus what you’re describing could be perfectly normal.
How much does the value increase/decrease for you?
Michael Juhl Føns
Jan 28, 2025
Regarding problem 1. The reference consumption should not change if you drive fast. The reference consumption should be what you car use at 110km/h. Your estimates increases more than 30% if you drive fast. The only way can get ABRP to work is be setting the consumption manual. It should not be like that. Please clarify.