DEFEATING ICE OPERATION

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Andyprius1, Aug 18, 2013.

Page 1 of 3
  1. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    Pressed on the gas pedal a bit too hard yesterday and instead of pulling over and rebooting, I just attained a bit more speed and put her in neutral and let the car glide to the next stop repositioning back into drive for the last 200 Ft, for regen. I did this for the next 4 blocks. And.... Ended up with only ONE Bar of 25 mpg, all the rest were 100mpg bars..suburban speeds only. This was only a 2 . 5 mile local trip. Speeds : 40 MPHr.
     
    #1 Andyprius1, Aug 18, 2013
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,745
    51,772
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i think you might be onto something here.:sneaky:
     
    #2 bisco, Aug 19, 2013
  3. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    . Hopefully, I will be checking the repeatability of this procedure.
     
    #3 Andyprius1, Aug 19, 2013
  4. ukr2

    ukr2 Senior Member

    Joined:
    Feb 5, 2007
    1,010
    275
    31
    Location:
    Victor, NY
    Vehicle:
    2021 Prius Prime
    Model:
    XLE
    Andy,

    But did it stop the ICE? Or did the ICE finish warming up?

    I approach 2 stop lights that sometimes are RED after I accidentially turn on the ICE. This gives me a chance to Stop, then re-Start the PIP, turning off the ICE.
     
    #4 ukr2, Aug 19, 2013
  5. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    Mmjj
    I think the ICE continued its warmup, but, never showed this. The fact that I now had only one .25 bar leads me believe, the ICE was still running with a very much minimized load = " " " " . Normally I will have 2-3 bars of varying and improving Mpg. Going into neutral changed the screen readout. Yes, I normally reboot using the same procedure you use, even going so far as to pull off the road and restart. It might prove educational if more people would try this, then we could form a consensus as to it's validity.
     
    #5 Andyprius1, Aug 19, 2013
  6. lensovet

    lensovet former BP Brigade 207

    Joined:
    May 23, 2009
    2,615
    496
    0
    Location:
    Burlington, NJ
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    guys, don't forget it's late august. today i accidentally accelerated too hard. ICE shut off less than 60 seconds later because it was 85+ degrees outside.
     
    #6 lensovet, Aug 20, 2013
  7. jnet

    jnet Member

    Joined:
    Aug 17, 2013
    196
    32
    0
    Vehicle:
    2012 Prius
    Model:
    Two

    I was thinking the same thing. Since the ICE would use so little gas, is it really worth wasting time pulling over and reboot? Not to mention risking getting hit by some drunk driver
     
    #7 jnet, Aug 20, 2013
  8. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    ßßß
    Uioppea"monobv""OoOiI
    . Sure, OAT is always a determinant. PS. How does one measure seconds in the car? Now that would be a useful digital readout ( amount of time ICE was on ).
     
    #8 Andyprius1, Aug 20, 2013
  9. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    The initial post referred to NOT having to do that ! /// coincidentally that was also the subject matter.
     
    #9 Andyprius1, Aug 20, 2013
  10. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    Attempted to deliberately duplicate this morning, unsuccessfully ! Had two bars of less than 100mpg.
     
    #10 Andyprius1, Aug 20, 2013
  11. Ken Blake

    Ken Blake Active Member

    Joined:
    Nov 29, 2012
    351
    180
    6
    Location:
    Portland, Oregon
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    I've read that not allowing the ICE to finish warming up is a bad idea. It only uses a tiny bit of gas to do it's warm-up thing, I'd rather not take the chance of hurting the engine.
     
    #11 Ken Blake, Aug 20, 2013
    markabele likes this.
  12. markabele

    markabele owner of PiP, then Leaf, then Model 3

    Joined:
    Mar 27, 2012
    5,084
    1,782
    1
    Location:
    Nebraska
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    I'm with you Ken. It is so worth that tiny little bit of gas to ensure that you aren't hurting the engine at all. Even if there is a slight chance the engine could be hurt in some small way it still seems like a no brainer.
     
    #12 markabele, Aug 20, 2013
    Andyprius1 likes this.
  13. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    . Where did you read this Ken? Also using my method as described in Post # 1 , I have no conclusive evidence that the engine was not running. In trying to duplicate what I did the first time, I noticed that each time I returned the car to EV, the screen showed the engine running. I still suspect I just Iightened the load on the ICE.
     
    #13 Andyprius1, Aug 20, 2013
  14. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    The discussion centers on continuing in EV as long as possible. When in EV the engine is not running! That must be terribly hard on the poor thing. Are you inferring I don't have a brain?
     
    #14 Andyprius1, Aug 20, 2013
  15. markabele

    markabele owner of PiP, then Leaf, then Model 3

    Joined:
    Mar 27, 2012
    5,084
    1,782
    1
    Location:
    Nebraska
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    It seems to me like this thread is about how to get the engine to shut off ASAP. Am I wrong?
     
    #15 markabele, Aug 20, 2013
  16. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    . Yes, It is about returning to ev when the driver inadvertently goes into Hv, however barring that option, is it possible to just let the car stay in Hv but still show good economy on the consumption, then letting the car return to ev, by it self automatically.
     
    #16 Andyprius1, Aug 20, 2013
  17. Andyprius1

    Andyprius1 Senior Member

    Joined:
    Feb 4, 2013
    2,327
    859
    1
    Location:
    Cool CA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    . # 1. Post says nothing about shutting the engine off.
     
    #17 Andyprius1, Aug 20, 2013
  18. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

    Joined:
    Jun 21, 2009
    3,097
    2,419
    0
    Location:
    Silicon Valley
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Can you explain how the ICE would be hurt? Remember that the ICE is being babied in the Prius all the time compared to the jerkiness of a regular car engine getting started. Regular cars get fuel injected into them when the engine isn't really ready for it and the oil has just started pumping.

    And in the PIP the ICE gets used even more infrequently than a regular Prius.

    Yes, I wouldn't do it every day, 5 times a day. But I wouldn't worry about it once every week or so. Remember what it was like in a regular car when the engine was hot and you shut it off and it dieseled. That is hurting the engine. Not allowing the ICE to always warm up probably just doesn't allow the catalytic converter to get up to its efficient temperature. Is it actually hurting anything. Don't know. But burning gas to heat it up then turning it off doesn't seem to make sense emissions wise. While it is warming up it is emitting bad stuff anyway.
    While the ICE is warming up the MG2 is spinning the engine smoothly and oil is pumping nicely.

    Mike
     
    #18 3PriusMike, Aug 20, 2013
  19. markabele

    markabele owner of PiP, then Leaf, then Model 3

    Joined:
    Mar 27, 2012
    5,084
    1,782
    1
    Location:
    Nebraska
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    I just remember all the people being against it said it had to do more with condensation build up.
     
    #19 markabele, Aug 20, 2013
  20. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

    Joined:
    Jun 21, 2009
    3,097
    2,419
    0
    Location:
    Silicon Valley
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Wouldn't more condensation build up when you don't even run the ICE at all? I could be wrong...but why does moisture only appear once you start the ICE but only for a little while?

    Mike
     
    #20 3PriusMike, Aug 21, 2013
(You must log in or sign up to post here.)
Page 1 of 3