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

Battery recharge cycle sucks...

Discussion in 'Gen 3 Prius Fuel Economy' started by Threej, Nov 13, 2018.

  1. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,039
    10,013
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    From the Gen3 BSFC (brake specific fuel consumption) charts published when this series was rolled out, I thought this engine was already quite close to top efficiency at that lower RPM, certainly better than on the Gen2. High efficiency is spread over a particularly wide RPM range.

    2500 RPM is too high for just simple battery charging, because that point on the ECU-managed engine operating curve is more power than the battery can accept.
     
    Threej likes this.
  2. Maarten28

    Maarten28 Active Member

    Joined:
    Jul 13, 2014
    414
    222
    1
    Location:
    Netherlands
    Vehicle:
    2011 Prius
    Model:
    Three
    Because the best efficiency is achieved at power outputs way higher than the battery can be charged at, so it is useless to be in that range just for charging the battery. Charging while being stationary is inefficient and should be avoided. That's also why it won't charge to 60% SOC while stationary.
     
  3. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    It does regen charge over 60% when warming up from cold soak or if ecu detects that engine temp is below threshold temp