Adaptive cruise

It's definitely wrong if it says that.

Though - you've put the question on the Gen 4 FORUM - but I'm certain that PRIME wouldn't either.

 

I does seem that the car is more hesitant to turn the engine off when driving a constant speed which is in the range of the EV mode. This could however be nothing more than a feeling. During traffic jams it shuts the engine off whenever it can do so.

It doesn't seem to have to much of an effect on mileage. For me it causes it to neatly drive in EV mode during the last mile home through town.

 

Yes, that it does. I drove home from Church just then - 30 km mixed traffic, but used DRCC most of the way - reads out 30% EV mode when I got home. Would have been the same if I'd driven it without DRCC.

 

completely false.
You can confirm this yourself. The next time you are using cruise control, in the info screen choose energy. You will see the engine charging the battery, and when it builds up enough charge the engine shuts off for a bit. The cruise being on or off doesnt change that.
I actually find it interesting to see how the car is making the decision on when to charge, use power, etc.

 

I can also state from personal observation that that claim was false. Engine behaves exactly the same in either cruise control mode as well as with CC turned off. In fact, I cannot think of a single reason for the engine to be forced on just because the DRCC is on. Makes no sense at all.

 

What I have seen on my Corolla is that when I drive without CC is that when I reach 80km/h (50mph) and I lift the throttle a bit it directly goes into EV mode. When using the CC to accelerate to 80km/h it doesn't do that. In the end it doesn't matter since whenever possible it runs in EV mode and for the rest the ICE is running.
I don't have any data on it but I don't think that it has any effect on mileage.

 

I have a scangauge so I can confirm this is false. However, if the car needs to slow down in DRCC due to traffic slowing down, it will force start the engine to use engine braking. This would be an excellent feature if going down a mountain but in flat florida its not so useful. Usually I prefer the charge over engine braking myself.

 

I can't say one way or the other for non-Primes, but there have been plenty of times someone has brake hard and I've even been cut off several times when on DRCC and it decelerated pretty hard. The engine never came on, but it did apply the brakes one time.

 

Not quite exactly the same. There are weird conditions related to battery temperature and state of charge when the engine will start if you turn on cruise control even if everything is otherwise right for EV mode.

Also, once the engine has warmed up, if cruise control is set the engine does seem to run more often at times when it wouldn't necessarily run if you were driving manually. Similar to how a traditional automatic transmission car seems more likely to downshift with cruise control on.

That is my experience too.

 

My engine has only come on in EV twice. Once when I accidentally used the defroster and the other time (in Colorado, btw) when the engine came on in EV mode and I think that was heat. We were coming down the north side of Grand Mesa, the SOC had gone from 10% to 98% in just a few miles, and I think it just got to the temperature limit.