Featured 2019 Prius restyling

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by pilotgrrl, Apr 11, 2018.

  1. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    39,152
    27,860
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah I noticed the mention of port and direct, interesting. Thanks for the patient explanations.

    I remember back a few decades Honda we using a throttle body with a single injector, sort of one step removed from a traditional carburetor, a big step though, what with computer control.
     
  2. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,887
    6,458
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    Yes, there were many cars with Throttle-body Injection back in the '80s. From memory it was more used in US and Japanese cars, the Euros had used port fuel injection earlier, I believe (my '74 VOLVO had D Jetronic Bosch port injection).
     
    Mendel Leisk likes this.
  3. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    40,684
    12,257
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Trollbait covered most of it but yeah, direct injection improves fuel economy and boosts hp. It'll reduce CO2 emissions but it increases VOCs and particulate matter emissions. Also, there have been some cases where direct injection leads to greater build up of carbon deposits on the valve heads since you don't have that air-fuel mixture entering the intake pipe to clean the valve heads.

    Toyota's solution is to use both. Dual port/direct injection for pretty much most of the driving and switching to direct injection only when power is needed.

    Watch the 4th video

    Know Your Toyota Videos (Toyota Canada) | PriusChat
     
    Mendel Leisk and alanclarkeau like this.
  4. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    39,152
    27,860
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Our previous Honda Civic hybrid had dual-lift cam lobes: low lift for most situations, high lift for things like acceleration on an up-slope. Different, but same intent. Thanks for the link, good video resource, I'd forgotten/missed that.

    Addendum, Toyota's Valvematic is somewhat similar to the above dual-lift.
     
    #84 Mendel Leisk, Apr 25, 2018
    Last edited: Apr 25, 2018
  5. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    40,684
    12,257
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Np.

    Yeah, that's valvetrain technology rather than fuel injection technology. I am under the impression that VTEC was more for power production rather than fuel economy? (at least the "lift' part. Of course variable valve timing helps with fuel economy and emissions)
     
    Mendel Leisk likes this.
  6. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

    Joined:
    Nov 3, 2012
    2,731
    1,143
    0
    Location:
    Sanford, NC
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    As with Porsche's Variocam and Variocam Plus. Comes on around 4500 RPM.
     
    Tideland Prius likes this.
  7. bwilson4web

    bwilson4web i3 and Prime

    Joined:
    Nov 25, 2005
    23,274
    13,108
    0
    Location:
    Huntsville AL with 2014 BMW i3-REx
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    I understand the technical details but 'debacle' seems a little over the top. Has Toyota or customers pursued some remedy for the Gen-3 owners?

    I agree it is a poor design choice fixed in the Gen-4. It isn't clear that other than a periodic cleaning, this is a problem that demands legal or warranty remedies.

    Bob Wilson
     
    Lightning Racer and Mendel Leisk like this.
  8. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,188
    1,180
    0
    Location:
    Southern MN
    Vehicle:
    2010 Prius
    Model:
    II
    The Hyundai DI engines actually recommend/require somewhat frequent use of a 'techron-like' gasoline additive. We have had a Sonata since 2012 and it is still going strong though without any problem whatsoever. I have been using Techron fairly frequently though.
     
    Tideland Prius likes this.
  9. civicdriver06

    civicdriver06 Active Member

    Joined:
    May 27, 2009
    797
    324
    0
    Location:
    Germany
    Vehicle:
    Other Non-Hybrid
    I wonder why Toyota is going through the trouble improving the "old" 1.8 engine of the 3. gen. Prius yet again ?
    They allready have done that with the 2016 Prius.
    If they can get 50 mpg with a 2018 Camry which is bigger and heavier than a Prius and has significantly more hp than the new2.0 Hybrid system which has 180 hp,then I have no reason to believe that the new 2.0 l. system won't be extremely efficient!
    There is no reason to wait until gen. 5 Prius as the new power train is even lighter and more compact,so it will fit in perfectly without any space issues.
    They at least could make it an option !
     
    #89 civicdriver06, Apr 26, 2018
    Last edited: Apr 26, 2018
    pilotgrrl and RCO like this.
  10. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    10,989
    10,605
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    They would not want the Prius to outshine the PHV/Prime!
    People expect Gen 5 to be higher performance and more fuel efficient than Gen 4. The 2.0 HSD gives them some tools to help achieve that,
     
    pilotgrrl likes this.
  11. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    40,684
    12,257
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Good to know.

    Cost? (ROI really)

    Also, Toyota runs their engines on a 10 year cycle at the minimum so honestly, it's not even 10 years yet. They'll leave the all new engine for Gen 5.

    e.g. the first Camry Hybrid in 2007 MY used the same engine as the 2002 Camry (prior generation) - 2.4 litre.
     
    RCO and alanclarkeau like this.
  12. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    39,152
    27,860
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I think the designers have that bit in their teeth, but it's certainly not foremost for me.
     
  13. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    14,922
    6,716
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    That 52mpg Camry is the lightest trim with smaller wheels than the ICE model. Throw on larger wheels, and it only does mid-forties for MPG. Then its rating may not be as understated as the Prius's.

    A whole new engine in the current Prius means running, and paying for, a whole new set of fuel economy and emission tests.

    Ford built the V6 Vulcan for 22 years. Toyota is not going to ditch an engine line until they get what profit they want out of it.
     
  14. civicdriver06

    civicdriver06 Active Member

    Joined:
    May 27, 2009
    797
    324
    0
    Location:
    Germany
    Vehicle:
    Other Non-Hybrid
    On the other hand,the all new Auris Hybrid will outshine the Prius for long 3 years !
     
    RCO likes this.
  15. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    10,989
    10,605
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    Not in the US, though
     
  16. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    14,922
    6,716
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    And it already outsells the Prius in Europe because of price.
     
  17. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,887
    6,458
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    - same here - nothing like as good a car - but was $7000 cheaper which would be tempting to many.
     
  18. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,887
    6,458
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    To improve an engine is only $$chicken-feed$$ compared with putting an entirely new engine in a car, particularly one like PRIUS where the Hybrid Synergy Drivetrain is involved. We haven't seen the figures - my suspicion is that the improved 1.8 will be more efficient in PRIUS than the 2.0 or so close that it doesn't warrant the $$$$ development cost.

    They would also want to keep Gen 4 roughly equivalent during it's model life without big changes. There has been no mention by TOYOTA that even the Gen 5 PRIUS will get the 2.0l engine.

    Gen 5 might be a totally different concept - hopefully with a 5 seat Plug-In version.
     
    Trollbait, RCO and Tideland Prius like this.
  19. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    10,989
    10,605
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    You would need a change in Australian Toyota management for it to benefit you. :(
    They say Aussies do not want Plugins.
     
    alanclarkeau likes this.
  20. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,887
    6,458
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    I think they might have a change of view - depending on how well IONIQ & KONA (I think?) Plug-Ins sell. Plus VW is contemplating bringing one here. From comments I've read on journals, there's a pent-up demand, particularly now that a few (only a few) charging stations are starting to appear. But the number who comment that "I've got roof-top SOLAR, just want the PlugIn to go with it", hopefully the cars will start coming.

    Oh - and hopefully some decent colour choices - almost all the ones I've seen are plain white:
    upload_2018-4-27_8-33-42.png upload_2018-4-27_8-34-22.png
     
    RCO likes this.
Loading...