ICE comes on anyway

So, wait, you accelerate and engage cruise control at the same time? My normal use of cruise is

1. Accelerate to desired speed.
2. Activate/set cruise control.
3. Adjust if necessary.

"Hey, Car. I'll show you how I want you to drive. Now you do it."

 

I'm not ready to do low temperature range testing, yet. In engineering, we like to hold constant as many variables as possible and only range test one. Speed is something the driver can control but temperature is for most of us, outside of our control.

Bob Wilson

 

Cruise was the unexpected element in the equation.

Normally, it is used for highway driving. With just a 25-mile EV capacity and a high probability of soon driving faster, engagement of that mode is instructing the system to be ready for more power to be demanded. So, it fires up the engine in preparation for that.

It's another easy-to-explain situation that took us a great deal of time to insolate detail for.

That's what we do as first-year owners.

 

Anything between 38-44F. My 50F failed and others have reported problems replicating in freezing weather.

If we can do an early cruise control ON that defeats engine ON at any subsequent speed, we'll have a great workaround.

Bob Wilson

 

Forgive me for taking what you said literally.

Still trying to come up with the exact formula so others can replicate.

 

Correct. It's just part of the chemistry... like how electric-resistance increases significantly when the battery-temp is lower than freezing... hence the addition of a battery-warmer to keep it from falling below 32°F.

 

Okay, now that we have that straightened out, do you want to try some more tests to see if we can find another workaround? So far, we have

• Drive at slower speeds for first 5 minutes
• Wait 5 minutes before driving off
• Don't use cruise control

 

Yes. But I think "5 minutes or so" might be a factor.

 

Do you want to try my other suggestion of drive off immediately, but park on the side street for 5 minutes before driving 35mph?

 

Engage cruise. Climate at whatever you would normally do when driving.

 

Yes. We have several different scenarios overlapping. ICE will kick in regardless, it's like an override.

Remember the 35 mph limit with PiP in the winter? That only applied when the pack was sitting outside in temps below 20°F. Speed came into play in that case.