EV mode not predictable

[rrolff]

I keep finding weird spots where in theory, I should be in EV, but the car won't let me, or it gives a strange message.

The latest today - in almost stopped traffic (dropping off for school), at 10MPH, and coasting down a hill at that speed (not even getting faster), no foot on gas, I get something to the tune of "EV inactivated due to excessive acceleration". I know the car was feeling the standard 9.8m/sq sec due to gravity - but the car is always under that constraint (at least at sea level).

I should start keeping a log (???).

Am I the only one???

[qbee42]

Perhaps a Valium would fix the problem.

Tom

[ken1784]

The max EV speed is 10mph when the coolant temperature is below 70C(158F).

Ken@Japan

[rrolff]

Originally Posted by ken1784

The max EV speed is 10mph when the coolant temperature is below 70C(158F).

Ken@Japan

Thanks - but it was running 10mph for a bit before giving the message - which has nothing to do with coolant (acceleration)...

[qbee42]

There are a number of parameters that feed into the EV calculation. Without access to Toyota documentation, we can only speculate and infer what they are. You can try to map out all of the permutations, or you can just shrug your shoulders and accept that it is what it is.

Tom

[rrolff]

Originally Posted by qbee42

There are a number of parameters that feed into the EV calculation. Without access to Toyota documentation, we can only speculate and infer what they are. You can try to map out all of the permutations, or you can just shrug your shoulders and accept that it is what it is.

Tom

Hrmm - I'll pass on the shrugging, and work at getting an answer... While 42 may work for some - I'm looking for more

[qbee42]

Originally Posted by rrolff

Hrmm - I'll pass on the shrugging, and work at getting an answer... While 42 may work for some - I'm looking for more

The Prius does offer a lot of mysteries to solve. It's like a rolling puzzle. That said, I'm pretty sure the answer *is* 42.

Tom

[patsparks]

Don't think about it so hard. Just drive it. Personally I let the system decide when to use EV, it is pretty good at it actually.

Things that kick you out of EV are, coolant temp, battery charge, battery temp and the right foot.

[Tideland Prius]

Originally Posted by rrolff

Thanks - but it was running 10mph for a bit before giving the message - which has nothing to do with coolant (acceleration)...

Have you ever considered that the engine cools down when you're not using it?

[rrolff]

Originally Posted by Tideland Prius

Have you ever considered that the engine cools down when you're not using it?

To all the above, the simple answers move from:
1. A message like "too much acceleration" when I am not accelerating, or moving more than 10mph, with foot off the gas for seconds, and no real perceived forward acceleration (I could feel the downward one - as I was firmly placed in my seat) - shows either an issue with software, or an issue with a sensor on my car.

2. The number 42 should only be an issue with dolphins or people waiting at a diner - not for someone trying to find the answer to the Prius.

3. Why do we take EV mode like it is some weird crazy alien animal that should be ignored - and not understood?????