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ICE comes on anyway

Discussion in 'Prime Main Forum (2017-2022)' started by priuscatprimeguy, Feb 26, 2017.

  1. bisco

    bisco cookie crumbler

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    thanks, i forgot to include that. but charging indoors, even unheated, is completely different.
     
  2. priuscatprimeguy

    priuscatprimeguy Senior Member

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    When I got into my car this afternoon after charging the battery the cabin temperature was very warm (sunlight) did the same left turn onto 14 mile road, accelerated to 35 MPH set cruise to 35 MPH. ICE did not kick in
     
  3. mr88cet

    mr88cet Senior Member

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    Aha! So then, it sounds like the expectation/rumor that B mode behaves like Tesla's "normal" mode," as far as you can tell at least, is true?

    That is, in EV operation with a less-than-full battery, it's exactly the same as "D" except that it engages more regenerative braking when you ease your foot off the gas, true?


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  4. thatoneraccoon

    thatoneraccoon Active Member

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    Well I'm not sure about Tesla, I haven't drove one yet. However, it does seem like "B" is just a stronger Regen. I have started to use it more, like when I have to stop quick I'll slap the joy stick in B and recover more juice :D

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  5. Captmiddy

    Captmiddy Active Member

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    FYI - I don't think it is just the outside temp and the fact he is charging outside. I don't own a garage so I have only charged outside. I have gotten into the car when it was below zero and had it stay in EV mode until I was going down a long hill. In fact only 1 house out of seven in my section of the street owns a garage so if anyone else gets a plug-in they will also be charging outside.

    I would have to wonder if the more likely issue is that the battery heater isn't working as it should be. If the battery isn't being warmed during charge as expected, the car would start off cold, as soon as he gets moving the battery forces the ICE on when too much load is pulled for the cold battery.
     
  6. thatoneraccoon

    thatoneraccoon Active Member

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    Yeah I don't think the heater is working as it should be or a battery temp sensor isn't working properly. Something that should be able to be checked by a tech using Toyota tis one would think

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  7. priuscatprimeguy

    priuscatprimeguy Senior Member

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    Prime charging status 2-9-2017.JPG

    Here's the battery warmer in action, the left hand side shows the five hours to charge the battery, then the two other charges is the battery warmer in action. seems like warming the battery every twelve hours is really not enough times to adequately warm the battery
     
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  8. thatoneraccoon

    thatoneraccoon Active Member

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    Oh wow, yeah it sure looks that way. I would almost think 2 hours would be pushing it

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  9. priuscatprimeguy

    priuscatprimeguy Senior Member

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    welp, I took my usual trip to Kroger, left turn onto 14 mile road. Upon completion of the left turn accelerated to 35 MPH set cruise. outside temp. 46 degrees F. ICE did NOT come on.
     
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  10. thatoneraccoon

    thatoneraccoon Active Member

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    Well it looks like 46 is warm enough not to invoke the ice. I wonder what the cut off is temp wise.

    Also if tonight gets into the 30's, I'll fully charge my prime and I'll park it outside and not have it plugged in and see if the ice comes on, on my way to work. I have a hill and I usually take it to 50+ mph going up it, and I'll let ya know what mine does

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  11. thatoneraccoon

    thatoneraccoon Active Member

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    And next day I'll try leaving plugged in outside over night just too see what it does

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  12. priuscatprimeguy

    priuscatprimeguy Senior Member

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    50 degrees was the cutoff for the 2012-2015 PIP
     
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  13. thatoneraccoon

    thatoneraccoon Active Member

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    Well tonight is supposed to be 55, but rest of the week will be in the 20's and 30's. I'm also thinking of reworking the test. Leave plugged in over night with the 120, then next day 240 and 3 day not plugged in and see what happens. 1488298907070.png

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  14. mr88cet

    mr88cet Senior Member

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    Excellent! Looking forward to it when my P.Prime arrives.

    I realize this is a little off-topic, but just for comparison, the "normal" way to to drive a Tesla is with lots of regen. The effect is sometimes described as "single-pedal driving," since you comparatively rarely hit the brake pedal. You can switch to less regen, for a corresponding range reduction, but I gather that most Tesla drivers stick with "normal mode." I gather that the BMW i3 works similarly. I suspect I will do the same on my P.Prime when it arrives. Relatedly, on the Volt and the Bolt, "L"ow-gear on the shifter does essentially that too. They also have paddle on the back of the steering wheel that brings the car to a pre-defined reasonable-distance stop using as much regeneration as it possibly can.


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  15. thatoneraccoon

    thatoneraccoon Active Member

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    Yeah, I'd always use the volts "L" sadly "B" isn't as strong as a regen, kinda wish we were givin an option to adjust that

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  16. mr88cet

    mr88cet Senior Member

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    Good info (not as strong regen as the Volt/Bolt). Assuming that greater regen is all "B" does (again, in EV mode with a less-than fully-charged battery), then I suspect I'll use it a lot.

    I've heard at least one comment to the effect that the P.Prime uses 100% regenerative braking until it becomes ineffective, and then only then kicks in friction braking. If so, then that would be great, but I don't know how s/he can be sure that that's how it works. Since brakes must, above all else, stop the car with absolute reliability, I'd think that Toyota would be very very reluctant to put in anything that could turn off the friction brakes.


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  17. thatoneraccoon

    thatoneraccoon Active Member

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    Maybe it's just because I'm learning the Prius, but my braking score is a lot lower when I use B mode. However, you can see on the mfd that it recharges more and can feel it too. I should play with it more. So far I use it when I got to stop hard

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  18. mr88cet

    mr88cet Senior Member

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    Might be interesting to drive the same route a few time (in EV) in the same manner other than D vs B, and see how MPGe differs. I can't right off from the various YouTube videos whether it has an MPGe readout in EV mode...?


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  19. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I can't tell as I'm ~95% driving using dynamic cruise control ... all the time. The only thing is when someone turns off the road below 27-28 mph, the silly thing notices "Oh no one is there" followed by "OH NO, I'm too slow, kick myself out of dynamic cruise control."

    I wish it would just resume speed like it does when following stopped traffic at a light.

    Bob Wilson
     
  20. mr88cet

    mr88cet Senior Member

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    Speaking as a Gen-2 driver waiting for the call from the dealership saying that my P.Prime has arrived, I'm really looking forward to having the opportunity to be annoyed by the Prime's adaptive cruise control not driving ideally well! :)


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