Tire temperature set points ?
Thread Starter
Instructor
Joined: Apr 2016
Posts: 103
Likes: 18
Tire temperature set points ?
Hi,
I read many threads on the subject and learned many people always see WARM as I do and summer tires have low traction and can crack in very low temperatures. I could not answer these basic questions:
-What are the temperatures that the system detects frozen/cold/warm/hot ? If GM never released this info I guess we must go on user experience.
-How accurate are these measurements ?
-Are the temperature sensors in the same sensor as the pressure sensors ?
The car is a 17 Z06 if that matters. I would have guessed sitting all day at 35F would be considered COLD but the display still said WARM.
Thanks,
Russ
I read many threads on the subject and learned many people always see WARM as I do and summer tires have low traction and can crack in very low temperatures. I could not answer these basic questions:
-What are the temperatures that the system detects frozen/cold/warm/hot ? If GM never released this info I guess we must go on user experience.
-How accurate are these measurements ?
-Are the temperature sensors in the same sensor as the pressure sensors ?
The car is a 17 Z06 if that matters. I would have guessed sitting all day at 35F would be considered COLD but the display still said WARM.
Thanks,
Russ
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
Very good question. I am running AS Contis and I remember last winter I took a drive in 10 degree weather. It took at least 10 miles of highway driving before my display said the tires were "Warm". It would be interesting to know if the TPMS sensors can also measure temperature but I doubt it.
Last edited by rmorin1249; Nov 23, 2016 at 09:09 AM.
Le Mans Master
Joined: Aug 2015
Posts: 6,884
Likes: 2,884
From: Toronto
I'm curious about this as well. I speculate they do. When I park in my warm garage and drive in cool temps it always reads as "warm". In the same temps if I park my car outside it reads "cold" and then transitions to "warm" after driving for a bit.
Drifting
Joined: Oct 2011
Posts: 1,872
Likes: 333
From: Olmsted Falls Ohio
St. Jude Donor '12 thru '24
FWIW, I've read information that seems to imply it is a somewhat extrapolated value. A while ago it was posted here (I believe here but can't find it with a quick look) it begins with the current OAT, whether the tires are rolling, how long the car has been started, miles travelled since start and so on. The computed values are then summarized for display into the cold, warm and hot categories. Seems I recall that the lower end of the warm category started around 45 degrees or so. The whole feeling of the discussion was that it was far more general than specific. Kind of reminds me of the 'Horsepower' pocket gauge.
On the other hand I've seen specific temperature values by taking files from my PDR and processing them through the free Cosworth ToolBox software. So somehow the telemetry, whether computed or a direct value from a TPMS sensor which I also doubt, makes it through to the PDR files.
I know, doesn't answer the question.
On the other hand I've seen specific temperature values by taking files from my PDR and processing them through the free Cosworth ToolBox software. So somehow the telemetry, whether computed or a direct value from a TPMS sensor which I also doubt, makes it through to the PDR files.
I know, doesn't answer the question.
Last edited by pickleseimer; Nov 23, 2016 at 09:56 AM.
Drifting
Joined: Oct 2011
Posts: 1,872
Likes: 333
From: Olmsted Falls Ohio
St. Jude Donor '12 thru '24
Well, this piqued my interest and I looked a little more. Here is a post from the 'other' forum which contains an item of information from a second source.
"Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science, but it is one that data modeling can largely overcome. And it's one more piece of information that can be utilized to enhance the driving experience.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly."
2014 Chevrolet Corvette: Seven Things You Don't Know About the C7 on Edmunds.com
"Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science, but it is one that data modeling can largely overcome. And it's one more piece of information that can be utilized to enhance the driving experience.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly."
2014 Chevrolet Corvette: Seven Things You Don't Know About the C7 on Edmunds.com
Administrator
Joined: Mar 2001
Posts: 368,037
Likes: 24,726
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Interesting info so far - maybe this could be an Ask Tadge question.
