Does ICE turn on going downhill with fully charged battery?

[Ladogaboy]

Ah, that's my mistake. I thought your readout showed actual gas being used. If it's not, then you're probably just dealing with the same glitch as others.

I wonder if the Volt uses the ICE to retard forward movement when the battery is at capacity, since there is no need to regenerate extra energy while braking. That might make the system register ICE use, even though no gas is being used. Traditional cars can be used to compression brake in a very similar way.

[tboult]

Ah, that's my mistake. I thought your readout showed actual gas being used. If it's not, then you're probably just dealing with the same glitch as others.

I wonder if the Volt uses the ICE to retard forward movement when the battery is at capacity, since there is no need to regenerate extra energy while braking. That might make the system register ICE use, even though no gas is being used. Traditional cars can be used to compression brake in a very similar way.

Note it does not use the ICE to retard , it uses the second EV motor (already quoted that earlier in this thread).
But entering that mode might not have been tested enough interms of what it does for the display.

[ItsNotAboutTheMoney]

Given a fixed choice I think it's better to err on the side of CS because you're in a situation in which you should be using regen (which would come under EV), but you aren't, you potential-energy wastrel.

I think it would show a nice touch to allow owners to set a lower maximum charge limit just for this situation. It wouldn't hurt the battery, either.

And, just to correct what the OP wrote, in this situation (where a Prius driver uses B mode) saying that the Prius "runs" the gas engine to brake is misleading since no fuel is used. It uses charge to spin the engine to generate additional drag. (This can also occur 45mph in a Prius to allow a high-speed glide, but in that case it's to prevent the motor exceeding maximum rpm).

[pdxman1]

...

And, just to correct what the OP wrote, in this situation (where a Prius driver uses B mode) saying that the Prius "runs" the gas engine to brake is misleading since no fuel is used. It uses charge to spin the engine to generate additional drag. (This can also occur 45mph in a Prius to allow a high-speed glide, but in that case it's to prevent the motor exceeding maximum rpm).

There seems to be some dispute about the behavior of the Prius Plug In in this situation. Over on the Prius Chat forum, some people claim that the Prius uses the engine for braking without using fuel, but some claim that the Prius would turn on the engine and then continue to run because once it starts a cold engine, it must continue to run for a minimum amount of time. I didn't find a definitive answer over there.