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

100 mpg displayed, what going on with the ICE

Discussion in 'Gen 3 Prius Technical Discussion' started by joematlack, Aug 22, 2012.

  1. joematlack

    joematlack Junior Member

    Joined:
    Jun 2, 2012
    12
    3
    0
    Vehicle:
    2012 Prius
    Model:
    Two
    When the mpg guage jumps to 100mpg and you are above 42mph, what is the the ICE doing, I don't have a scanguage yet. Is the ICE still spinning with the fuel injectors shut off???
    thanks
    joe
     
    #1 joematlack, Aug 22, 2012
  2. F8L

    F8L Protecting Habitat & AG Lands

    Joined:
    Aug 14, 2006
    19,011
    4,081
    50
    Location:
    Grass Valley, CA.
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    It depends.

    If your SOC is fairly high (60%) and you are in a glide or coast then above 46mph the ICE is spinning but no fuel is being delivered (9999mpg). If your SOC is low (45%) then the ICE is on and fuel is being use to charge the HV battery and your fuel economy is around 150mpg. There a re a lot of situations where you are just cruising at a low speed above 46mph but you are traveling slightly downhill and your iMPG is 100+ but the factory display only goes to 99.9 so you don't know exactly what is going on. Having a Scangauge or the Torque app is very helpful. For us hypermilers, 99.9mpg just isn't enough and doesn't tell the whole story. There is a world of difference between 101mpg and 9999mpg. :)
     
    #2 F8L, Aug 22, 2012
(You must log in or sign up to post here.)