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

2ZR-FXE, 1.8L engine

Discussion in 'Gen 4 Prius Technical Discussion' started by bwilson4web, Feb 4, 2016.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    From the new car features, probably not unique to the 2016 Prius:
    • warm coolant from cylinder head - goes to the throttle body to prevent carb ice and also to the EGR exchange.
    • thermostat range - 80-84 C
    • air fuel ratio - provides proportional output to the oxygen level to adjust the fuel-air mixture
    • some suggestion that exhaust gas heating is not on all models (?!)
    • max HP: 96@5200
    • max torque: 105@3600 (ft*lb @ rpm) 72@3600
    • need to figure out which ones have exhaust heat recovery or not - Is this Level 2 ECO option?
    • traction battery case (NiMH) is plastic . . . at f*ckin' last!!!!
    Bob Wilson
     
    #1 bwilson4web, Feb 4, 2016
    kgall likes this.
  2. EZW1

    EZW1 Active Member

    Joined:
    Aug 20, 2008
    722
    80
    7
    Location:
    Phoenix, AZ
    Vehicle:
    2016 Prius v wagon
    Model:
    Four Touring
    I've read somewhere on this site that Toyota put the 12V battery under the hood. I don't like this because engine head and under-hood temperatures are always hard on the battery. Here in AZ it is typical for a 12V battery to die around 3years use. I would imagine the smaller prius battery would die quicker. Not sure why Toyota did this other than to reduce cost of the long wire run to the back of the car. They certainly didn't do it for weight distribution since the car is already front heavy.
     
    #2 EZW1, Feb 6, 2016
  3. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    Under the hood, they don't have to use a vented battery which is cheaper.

    Bob Wilson
     
    #3 bwilson4web, Feb 6, 2016
    wenreder likes this.
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,129
    50,045
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    they put in a larger battery, no worries.
     
    #4 bisco, Feb 6, 2016
    wenreder likes this.
  5. Grus

    Grus Member

    Joined:
    Sep 9, 2015
    79
    80
    14
    Location:
    China
    Vehicle:
    2012 Prius
    Extra luggage volume in the back is also important.
     
    #5 Grus, Feb 7, 2016
    wenreder likes this.
  6. Former Member 68813

    Former Member 68813 Senior Member

    Joined:
    Oct 3, 2010
    3,524
    981
    8
    Location:
    US
    Vehicle:
    Other Hybrid
    Model:
    N/A
    so, how is it different from gen 3, except for more EGR, less HP, and the carb use?
     
    #6 Former Member 68813, Feb 7, 2016
    CR94 likes this.
  7. kgall

    kgall Active Member

    Joined:
    May 3, 2009
    984
    152
    2
    Location:
    Olympic Peninsula, WA
    Vehicle:
    Other Hybrid
    Model:
    N/A
    What does the exhaust gas heat, and have you figured out whether it's only on some models?
    Thanks!
     
    #7 kgall, Feb 7, 2016
  8. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    I couldn't tell from the New Car Features. The earlier charts from the September reveal indicated there was a change in the intake manifold to improve 'tumble' but nothing in NCF. Speculation, changing the cylinder fill with more 'tumble' may reduce the amount of fuel-air at maximum power.

    One thing in NCF that I didn't mention is reference to an extended injector that avoids 'wetting' the intake manifold. The gas is injected on the intake valves and cylinder head port. It is as close to direct injection as possible. But I didn't check to see if it was in the 2010 model engine.
    Speculation, the Prius is sold in countries that may not be so persnickety about warm-up emissions and more purchase price sensitive. My first thought was Mexico or other more tropical countries.

    In the 2010, the exhaust heat exchanger is only used to 40C, usually just a mile or so. Elimination would lengthen the engine warm-up and subsequent emissions but also remove a part that can fail and has a cost.

    Bob Wilson
     
    #8 bwilson4web, Feb 8, 2016
    kgall likes this.
  9. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    22,447
    11,760
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    I was thinking the 'tumble' was for better mixing and distribution of the air:fuel charge in the cylinder.
     
    #9 Trollbait, Feb 8, 2016
  10. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    Yes. This improves efficiency but it may have reduced the amount of fuel-air drawn in the cylinder because of the tumbling. In effect, slightly choking the inflow.

    Bob Wilson
     
    #10 bwilson4web, Feb 8, 2016
  11. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    11,340
    3,596
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    Other Hybrid
    Model:
    N/A
    So far we're not getting from Toyota USA the nice, lengthy, detailed YouTube technical discussion Gen4 vs. Gen3 like we got for Gen3 vs. Gen2 when Gen3 came out.
     
    #11 wjtracy, Feb 8, 2016
  12. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    The engineer's report was pretty detailed about describing the areas of improvement. In April we should get access to the SAE papers and they will have more details . . . never enough but as much as we're likely to see. Then we'll see if any of the new owners go ODB nuts as I will when I can finally rent one for a week.

    Bob Wilson
     
    #12 bwilson4web, Feb 8, 2016
  13. Grus

    Grus Member

    Joined:
    Sep 9, 2015
    79
    80
    14
    Location:
    China
    Vehicle:
    2012 Prius
    Here is the fuel injector assembly in the old version 2ZR-FXE's NCF, I don't know if they are the same since I haven't had a look at the new one. This feature was not mentioned in the paper SAE 2009-01-1061 Development of New 1.8-Liter Engine for Hybrid Vehicles.

    fia2010.png

    According to Toyota Electronic Parts Catalog System, for the Prius Gen 3, the China model and Thailand model's exhaust pipe assemble (Part # 17410-37160) don't come with EHRS. All Japan models do have EHRS. There are some EUR and USA models don't have EHRS, but I don't know the exact areas they are sold.
    EPCehrs.png

    P. S.
    It seems that all PiP models have EHRS, while only USA & Canada's Prius V has EHRS.

    Speculation, cost / climate / emission regulation play differently in different areas.
     
    #13 Grus, Feb 9, 2016
    Last edited: Feb 9, 2016
    bwilson4web likes this.
  14. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,470
    6,871
    2
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Both the PIP and the Prius v were EPA tested* in MY2012, when they were introduced, while the Liftback was tested in MY2010, when it was introduced, perhaps it was too expensive to retest for EPA compliance for the new part.

    *Often this is by the manufacturer for the EPA, not by the EPA.
     
    #14 JimboPalmer, Feb 9, 2016
    Trollbait likes this.
  15. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    27,660
    15,661
    0
    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    The only overt text change is addition of "12-port" injector. The sketches are similar but resolution is too coarse to see the difference.

    Bob Wilson
     
    #15 bwilson4web, Feb 9, 2016
  16. JamesBurke

    JamesBurke Senior Member

    Joined:
    May 19, 2009
    1,222
    493
    27
    Location:
    Morgantown, WV
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    #16 JamesBurke, Feb 11, 2016
    Grus, Tideland Prius, krmcg and 1 other person like this.
  17. Grus

    Grus Member

    Joined:
    Sep 9, 2015
    79
    80
    14
    Location:
    China
    Vehicle:
    2012 Prius
    had a look at the TOYOTA EPC 201511
    in the "USA, Canada" area, there is a Ext. Pipe w/o EHRS marked as "MEXICO SPEC" for Prius Gen 4
    p4extpipefront.png
    And ... there is a special "MEXICO SPEC" (marked as "CRUDE" for EUROPE area) cooled-EGR system,
    I think it means low-fuel-quality-designated (often comes with not-strict-emission-standards).
    P4EGR.png
     
    #17 Grus, Feb 17, 2016
    Last edited: Feb 17, 2016
    aurelio and bwilson4web like this.
  18. aurelio

    aurelio Member

    Joined:
    Feb 15, 2012
    72
    56
    0
    Location:
    Mexico
    Vehicle:
    2016 Prius
    Model:
    N/A
    Hi Grus. Where can I get the epc? I'm waiting my new 4gen prius in a few days in Mexico, and I think it will be useful to have a copy.

    SM-N900W8 ?
     
    #18 aurelio, Apr 11, 2016
  19. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,666
    39,220
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Electronic Power Control? No..., I'm stumped. What do you mean by epc?

    Not a guru. :)

    Ahh, Electronic Parts Catalogue. Ne'mind.
     
    #19 Mendel Leisk, Apr 11, 2016
  20. Grus

    Grus Member

    Joined:
    Sep 9, 2015
    79
    80
    14
    Location:
    China
    Vehicle:
    2012 Prius
    if you are not in the dealership network
    you may google something like "Toyota EPC 11/2015"
    and find some torrent file leaked from somewhere & repacked by someone
    use it at your own risk ... it is not an authorized way
     
    #20 Grus, Apr 12, 2016
    Last edited: Apr 12, 2016
(You must log in or sign up to post here.)