Gen 4 Staff Manual (In Japanese) =/ Specs/Design/Other Info

Discussion in 'Gen 4 Prius Main Forum' started by E46Prius, Sep 23, 2015.

  1. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    How did you get 6.2 in the first place? new Prius is 1,760 mm wide, 1470 mm tall, or 69.3" by 57.8'.
    5' 9.3" by 4'9.8" give you 6.0 sq ft?
     
  2. iplug

    iplug Senior Member

    Joined:
    Mar 21, 2012
    2,407
    1,677
    0
    Location:
    Rocklin, CA
    Vehicle:
    Other Electric Vehicle
    Model:
    ----USA----
    Yeah, scratch that. Looks like 6.2 was already CdA.
     
  3. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    Yes it is. EcoModder has a list of the cars. Gen4 should have 6.0 CdA, 4% less
     
  4. Lee Jay

    Lee Jay Senior Member

    Joined:
    Jun 25, 2009
    5,579
    3,825
    0
    Location:
    Westminster, Colorado
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    The other thing that can change drag A LOT is the rolling resistance coefficient of the tires (which itself changes with temperature). As I understand it, the one in Vegas had a newer version of the Bridgestone Ecopia than the ones that come on the 2015. If so, that could change mileage quite a lot on its own.
     
  5. usbseawolf2000

    usbseawolf2000 HSD PhD

    Joined:
    Sep 22, 2004
    14,487
    2,986
    0
    Location:
    Fort Lee, NJ
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Nice, 20% more efficient in those mechanical and electrical paths. Some improvements in aero drag. 4-5% increase in ICE efficiency.
     
  6. Lee Jay

    Lee Jay Senior Member

    Joined:
    Jun 25, 2009
    5,579
    3,825
    0
    Location:
    Westminster, Colorado
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    Car mileage is much, much less dependent on the peak efficiency of the engine than it is on the average efficiency over the driving cycle. If Toyota is able to hold it closer to the optimum point more, and if they are able to expand the width of the area around the peak, average efficiency could go up much more than the peak amount.

    I did a study a long time ago, and in that case, a flat efficiency of 90% was better than a normal curve peaking over 96%. That was for something entirely different than this, but they are similar in the demands they place on efficiency.
     
  7. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    Very true. Though it is hard them to beat now (sadly) discontinued Energy Savers. EP422 were only half way there.

    When we switched from EP20 to Mich ES, MPG jumped up 2-3MPG.
     
  8. energyandair

    energyandair Active Member

    Joined:
    Jun 9, 2009
    905
    338
    0
    Location:
    Victoria BC Canada
    Vehicle:
    2010 Prius
    Probably originally to differentiate engines with combustion internal to the engine from from steam engines with external combustion (in a boiler).
     
  9. Mendel Leisk

    Mendel Leisk Sand Pounder

    Joined:
    Oct 17, 2010
    46,034
    32,875
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah, akin to SLR, for Single Lens Reflex. It's long since triumphed over Twin Lens Reflex, but the need to differentiate lives on.
     
  10. giora

    giora Senior Member

    Joined:
    Aug 28, 2010
    1,966
    724
    0
    Location:
    Herzliya, Israel. Car: Euro version GLI
    Vehicle:
    2013 Prius Plug-in
    Model:
    N/A
    The reduction in battery peak power indicates to me that maybe the 'gear ratio' of the PSD was changed (fist time) to give less than 28% of ICE torque to MG1, giving more to the mechanical path.
    This way, the electrical path will have less losses both by the more efficient components as well as by the lower current through them.
    In this configuration battery peak power and MG2 rated power can both be lower.
     
    #190 giora, Oct 3, 2015
    Last edited: Oct 3, 2015
  11. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    that makes sense and would explain drop in ICE power output: they prioritized low end torque to compensate for it. In ICE realm improving low end usually means loss of the top, it is a trade off.
     
  12. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    Does anyone know what were the HSD losses in Gen3? Is it 20% of 5% or is it 20% of 20%?
     
  13. giora

    giora Senior Member

    Joined:
    Aug 28, 2010
    1,966
    724
    0
    Location:
    Herzliya, Israel. Car: Euro version GLI
    Vehicle:
    2013 Prius Plug-in
    Model:
    N/A
    The expected improvement in fuel economy which now seems to be 15 to 23% (depending on model and test cycle) is comprised of many small improvements in many areas. There is no other way to improve the current best.
    To me, the complete picture is of much more interest than trying to figure out how much each small improvement contributes.
     
  14. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    Well Mazda is talking about 30% improvement with SkyActiv2. How? Switching to HCCI and 1:18 CR. I agree with you unless you go to radically different technology improvements are incremental at best.
     
  15. ken1784

    ken1784 SuperMID designer

    Joined:
    Dec 18, 2003
    2,940
    1,348
    67
    Location:
    Yokohama, JAPAN
    Vehicle:
    2010 Prius
    Model:
    N/A
    #195 ken1784, Oct 5, 2015
    Last edited: Oct 6, 2015
  16. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    95,353
    43,226
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i wonder if that will allow for aftermarket sunroof.
     
  17. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    42,859
    14,332
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    It's a normal roof. No pagoda roof on the Gen 4.
     
    ken1784 likes this.
  18. Mendel Leisk

    Mendel Leisk Sand Pounder

    Joined:
    Oct 17, 2010
    46,034
    32,875
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Thank God for that...

    Capture.JPG
     
    telmo744 likes this.
  19. cyclopathic

    cyclopathic Senior Member

    Joined:
    Apr 15, 2011
    3,292
    546
    0
    Location:
    2014 Prius c
    Vehicle:
    2010 Prius
    Model:
    II
    I think they call it pagoda for those indentation lines.. maybe it is not such a big deal anymore
     
  20. Mendel Leisk

    Mendel Leisk Sand Pounder

    Joined:
    Oct 17, 2010
    46,034
    32,875
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Oh, I think I get it: when the sun roof opens it lifts up? There was discussion too, on the "what drives us" debrief show after Vegas reveal: the sun roof on 2016 no longer does this.
     
Loading...