1. Attachments are working again! Check out this thread for more details and to report any other bugs.

EV to HV cut off speed

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by evebill8, Nov 11, 2012.

  1. evebill8

    evebill8 Member

    Joined:
    Oct 25, 2011
    139
    16
    0
    Location:
    San Jose, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Hi all,

    I am a new PIP owner. I was trying to find the setting of the EV to HV cut-off speed. The CNET review was saying it is 62 mile, but I am it is the default. I try to find it in manual, but I do not see any info. If you know the page no in the manual, please tell me. Thanks in advance!

    Billy
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i think it is 62, but not sure what you're asking.
     
  3. priuskitty

    priuskitty PIP FAN

    Joined:
    Nov 18, 2011
    2,286
    335
    0
    Location:
    Clawson, Michigan
    Vehicle:
    2015 Prius Plug-in
    Model:
    Plug-in Base
    page # in manual:D
     
  4. priuskitty

    priuskitty PIP FAN

    Joined:
    Nov 18, 2011
    2,286
    335
    0
    Location:
    Clawson, Michigan
    Vehicle:
    2015 Prius Plug-in
    Model:
    Plug-in Base
    actually, it's 100 kmh which equals 62 mph
     
  5. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    page 62?
     
  6. priuskitty

    priuskitty PIP FAN

    Joined:
    Nov 18, 2011
    2,286
    335
    0
    Location:
    Clawson, Michigan
    Vehicle:
    2015 Prius Plug-in
    Model:
    Plug-in Base
    funny wan, rnt u
     
  7. iplug

    iplug Senior Member

    Joined:
    Mar 21, 2012
    2,447
    1,695
    0
    Location:
    Rocklin, CA
    Vehicle:
    Other Electric Vehicle
    Model:
    ----USA----
    It's roughly 62 mph, but if you are not on an incline and gentle on the gas pedal, you can go several mph over this.
     
  8. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,994
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    If you go over 62 mph in EV mode, you don't get to the HV mode. You'll be in EV-Boost mode where the battery will continue to deplete while working together with the ICE.

    You'll have to hit the EV/HV toggle to enter the HV mode where the battery charge level would be maintained.
     
  9. john1701a

    john1701a Prius Guru

    Joined:
    Jan 6, 2004
    12,747
    5,243
    57
    Location:
    Minnesota
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    If you are in EV mode, the engine will fire up at 100 km/h (62.1 mph). However, you will continue to draw electricity at a higher rate than what you'd get from HV mode. The result is much higher MPG than usual. You can see that in the video below. We've coined this EV-BOOST mode. It will continue until you slow back down to automatically re-enter EV mode or run out of electricity (which then becomes HV mode).



    That EV/HV toggle button allows you to specify the modes as well, since sometimes you want to fire up the engine even when driving slower. For me, that's pretty much a necessity during the winter here in Minnesota. Using it for brief HV driving, you can then stay warm even while driving in EV mode.
     
  10. evebill8

    evebill8 Member

    Joined:
    Oct 25, 2011
    139
    16
    0
    Location:
    San Jose, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Thank you all very much!
     
  11. lensovet

    lensovet former BP Brigade 207

    Joined:
    May 23, 2009
    2,614
    495
    0
    Location:
    Burlington, NJ
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    Two things to add to what's already been said:
    -with very gentle acceleration, I've been able to get to 64 mph in pure EV mode
    -it is possible to be in pure EV mode even above these speeds if the engine has already warmed up and you're going at a slight (or not so slight) downhill. Earlier today, I was doing 72 mph with no engine input.
     
  12. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,994
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    It may not show an arrow on the screen but ICE should be spinning at around 1,000 rpm once you go over 62 mph.
     
  13. CharlesH

    CharlesH CA HOV Decal #5 on former PiP

    Joined:
    Nov 27, 2005
    2,783
    1,151
    0
    Location:
    Roseville, CA
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    As I understand it, there are mechanical consideration in the Power Split Device that connects the ICE, motor/generators, and wheels, that require the ICE to be spinning at least a little bit at speeds above 100 kmh. It may be providing very little power compared to the electric motors (the "EV-Boost" mode described above), but it has to be spinning.
     
  14. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,994
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Yup, MG1 would be spinning 9,500 rpm at 62 mph. It is rated for 10,000 rpm (65 mph) so I guess there is a safety limit.

    If the ICE spins at 1,000 rpm, MG1 speed drops down to 5,900 rpm (at 62 mph).
     
  15. evebill8

    evebill8 Member

    Joined:
    Oct 25, 2011
    139
    16
    0
    Location:
    San Jose, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    I forgot to ask. If there is a way to change the default, 62 mph, to other value?
     
  16. lensovet

    lensovet former BP Brigade 207

    Joined:
    May 23, 2009
    2,614
    495
    0
    Location:
    Burlington, NJ
    Vehicle:
    2018 Tesla Model 3
    Model:
    N/A
    no. unless you want to change the laws of physics :p
     
  17. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,994
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    We know it is possible with software because the limit for a regular Prius is 45 mph.

    To go higher speed, the PSD ratio needs to change. That would like result in lower MPG as we've seen in C-Max Energi.
     
  18. priuskitty

    priuskitty PIP FAN

    Joined:
    Nov 18, 2011
    2,286
    335
    0
    Location:
    Clawson, Michigan
    Vehicle:
    2015 Prius Plug-in
    Model:
    Plug-in Base
    what benefit would you get at speeds faster than 62 mph? at 62 mph your EV would be 6.2 miles at best
     
  19. evebill8

    evebill8 Member

    Joined:
    Oct 25, 2011
    139
    16
    0
    Location:
    San Jose, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    I asked because the CNET review made it sound like configurable.
     
  20. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,994
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    If you switch to the HV mode, the limit will be 45 mph. Enter the EV mode and it'll be 62 mph again. I guess it is selectable that way.