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

More torque please

Discussion in 'Prime Main Forum (2017-2022)' started by Prashanta, Aug 16, 2017.

  1. john1701a

    john1701a Prius Guru

    Joined:
    Jan 6, 2004
    12,755
    5,245
    57
    Location:
    Minnesota
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I haven't ever had any trouble merging EV mode. If I did, I'd just drive in EV-Auto mode instead.
     
    #21 john1701a, Aug 18, 2017
    Last edited: Aug 18, 2017
    HPrimeAdvanced and joachimz like this.
  2. joachimz

    joachimz Senior Member

    Joined:
    Jan 21, 2012
    451
    612
    17
    Location:
    SoCal
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    me neither ... and I am in SoCal ...
     
    HPrimeAdvanced likes this.
  3. Prashanta

    Prashanta Active Member

    Joined:
    Oct 11, 2016
    292
    242
    0
    Location:
    Canada
    Vehicle:
    2017 Prius Prime
    Model:
    Technology
    The most compelling answers I'm getting are: (1) for efficiency, and (2) to save costs.

    Efficiency: Major reason that a heavier vehicle is less efficient than a lighter vehicle is that every time you break, you lose more kinetic energy to heat. This problem is largely mitigated in cars with regenerative breaking. This explains how (if the reports are true) the new Model 3 is able to manage 120+ mpge even with a large 80 kwh battery and quick acceleration.

    But I wanted a more powerful motor, not a bigger battery. The consensus seems to be that a more powerful motor would not have caused battery discharge beyond the operating parameters allowable by the 8.8 kwh battery. I don't believe a more powerful MG1 or MG2 would have significantly added to weight to factor into the efficiency equation.

    Cost: I am also not convinced that a more powerful motor would have significantly added to the costs. Otherwise the all-electric cars like the Bolt or the Model 3 or the upcoming Leaf would have been prohibitively expensive -- they all have significantly more powerful motors. For 10% additional cost (for motor), Toyota could have built something with much more than 10% additional power.

    "I buy Prius for its efficiency": I disagree with the sentiment that people purchase a Prius only for its efficiency and not for its handling or power or acceleration or _fill in the blank_. Toyota went to great lengths to improve the handling and ride comfort in Gen 4 Prius. Surely they could have spent that effort on making it even more efficient instead! Give the Gen 4 Prius more pep and low-profile tires, and you can almost pretend it's a sports car! People can value one aspect of a car, like efficiency, more than other aspects, but the importance of any one variable is never zero.

    People don't base their car purchases on their needs alone. They want to feel good about the purchase. It's an emotional decision. Cars that evoke such emotions from people give MORE than what people need. The Prime could have been that vehicle.

    Having said this, I'm still buying one!
     
    #23 Prashanta, Aug 18, 2017
    Last edited: Aug 18, 2017
    jaqueh likes this.
  4. Sam Spade

    Sam Spade Senior Member

    Joined:
    Dec 3, 2016
    2,036
    1,023
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    You are just blowing smoke.
    No two individuals have exactly the same motivations when buying a car.
    Yet you presume to know the minds of several million of them.
    Pure hogwash.

    If you are trying to impress us with your intelligence.......I think you are failing miserably.
    Others may not share my opinion.
     
  5. Mark57

    Mark57 2021 Tesla Model 3 LR AWD

    Joined:
    Aug 14, 2009
    2,945
    2,736
    0
    Location:
    OK
    Vehicle:
    Other Electric Vehicle
    Model:
    N/A
    Took a contractor to lunch in my vehicle. He was just in from LA. He asked why I kept using my turn signal (he was serious). He said turn signals were a sign of weakness in CA.
     
    Mendel Leisk, 1x1 and joachimz like this.
  6. jaqueh

    jaqueh Active Member

    Joined:
    Jul 13, 2013
    341
    199
    0
    Location:
    San Francisco
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    I honestly don’t understand ev-auto. How is it good for an engine that has been cold for hours to be fired up all of a sudden and running at full power?

    But yeah obviously if I find it risky to merge to a freeway in ev mode I turn the car to hybrid mode 5 minutes before.
     
  7. joachimz

    joachimz Senior Member

    Joined:
    Jan 21, 2012
    451
    612
    17
    Location:
    SoCal
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    I had to google "turn signal" :D:ROFLMAO: ... true statement.
    When you get your Prime, and you decide to not disable LDA, you might even use those suckers more often to avoid the distraction on your MID reminding you that you are changing lanes :):)
    Back on topic, my commute home, taking my normal route, I have to cross 6 (six) lanes to get from fwy entry into the carpool lane within ~1/2-3/4 mile (and traffic going 25mp in the right and 75mph in the far left lane), found myself going 80mph in EV and barely made it, no issue with acceleration, just frickin dangerous as the next entry into the carpool lane is 3 miles away and mostly stop/go ... so i changed my local route and now get onto a dedicated on-ramp in the middle of the fwy straight into the carpool lane ...
     
    Mark57 and HPrimeAdvanced like this.
  8. Prashanta

    Prashanta Active Member

    Joined:
    Oct 11, 2016
    292
    242
    0
    Location:
    Canada
    Vehicle:
    2017 Prius Prime
    Model:
    Technology
    I'm not trying to impress anybody, but thanks for your concern. I'm trying to understand why the Prime doesn't have a stronger motor because I strongly feel it would have been to Toyota's advantage.

    And what a douchy thing to say!
     
    #28 Prashanta, Aug 18, 2017
    Last edited: Aug 18, 2017
    HPrimeAdvanced and jaqueh like this.
  9. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,318
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    They made it more Efficient, more ride comfort (except Trim Two seats :( ), more pep, and (for the Prime) more EV and more starting acceleration by Combining MG1 & MG2 with a one-way clutch.

    Since you say you're buying one, that means your rant was in vain. Toyota wants to spend the minimum amount to get the sale and they did that.
     
    Trollbait and HPrimeAdvanced like this.
  10. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    22,124
    11,563
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    A more powerful motor would shorten a typical drivers EV range. Yes, the current battery could handle it, but you are draining it faster for that acceleration.

    The Prime starts at $27.5k and has tight margins. Even a small cost increase for a more powerful motor is going to be noticed. But it isn't just the only cost change. If it's physically bigger, it will require a new case for the motors and transaxle. It will require an inverter to match its higher power, along with software changes. The clutch added for the Prime, likely just replaces the bearing on the ICE input of the unit.

    Despite how Toyota markets it, the Prime is just a Prius, and the more you change the parts between the two, the more you increase the cost for the Prime. Toyota isn't going to support the Prime by subsuming some of its costs into Prius sales.
     
    HPrimeAdvanced likes this.
  11. I'mJp

    I'mJp Senior Member

    Joined:
    Mar 12, 2012
    628
    552
    0
    Location:
    Ma, USA
    Vehicle:
    Other Electric Vehicle
    Model:
    Three
    I find that the prime will "chirp" the tires way too often on my hasty take-offs, and acceleration seams good enough.

    Good enough until you get to about 33 miles per hour. Then it suck eggs.

    jp
     
    jaqueh likes this.
  12. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    22,124
    11,563
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    The tires needed to take advantage of any motor torque increases will drop efficiency for every mode.
     
  13. scm2000

    scm2000 Active Member

    Joined:
    Jul 18, 2007
    164
    125
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I dont understand that , ive driven my prime on expressways for 5 days now.. while in ev auto mode , eco mode, with ev miles left the car is much more responsive and peppy accelerating on an entrance ramp than in HV mode, where you have to go into power range and hope it gets up to speed in time.

    and in that 5 days the car stayed in ev mode till the ev battery drained befote turning on the ICE.
     
  14. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    44,934
    16,159
    41
    Location:
    Canada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    In my opinion, it's the additional cost of having another set of motors for one single model instead of simply using what they have in the parts bin - which is the Prius.

    Also, what would a more powerful motor do if the battery cannot output said power? A change in the discharge rate doesn't change the max output of a battery, right?
     
    Prashanta and Prodigyplace like this.
  15. jaqueh

    jaqueh Active Member

    Joined:
    Jul 13, 2013
    341
    199
    0
    Location:
    San Francisco
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Instant torque gives the illusion that the car is faster in ev mode, but it’s only quicker from 0-30mph. Also, what I meant with my post is ev auto puts unnecessary strain on the engine because it has to be turned on to big loads without completing a proper warm up cycle.
     
  16. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,696
    11,318
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    The Toyota HSD dies its best to have the engine complete its warmup cycle. It monitors the engine better and quicker than you can.
     
  17. scm2000

    scm2000 Active Member

    Joined:
    Jul 18, 2007
    164
    125
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I'll measure acceleration to highway speed in both modes. my impression is im further down the ramp in hv mode before i can merge.
     
    Tideland Prius and jaqueh like this.
  18. jaqueh

    jaqueh Active Member

    Joined:
    Jul 13, 2013
    341
    199
    0
    Location:
    San Francisco
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Yeah I understand that it completes the warmup cycle but there’s a reason why when you start this car in hv mode the engine is on but won’t be driving the front wheels for the first few minutes.
     
  19. scm2000

    scm2000 Active Member

    Joined:
    Jul 18, 2007
    164
    125
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    by the way about loads on a cold engine... i know it costs gas, but as far as engine life...

    i live in the north east very close to the expressway both at home and my destinations... i never let my 07 prius warm up... winter and summmer going highway speeds right away.

    i traded the car at ten years and 196 k miles... engine still delivering high mpgs.

    the mpgs i trade off for convenience of getting somewhere on time.
     
    Mark57, jaqueh and Prodigyplace like this.
  20. john1701a

    john1701a Prius Guru

    Joined:
    Jan 6, 2004
    12,755
    5,245
    57
    Location:
    Minnesota
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    It's basically like a gen-1 Prius plug-in mode, which never was a problem for me starting cold on a ramp.
     
    Mark57, jaqueh and Prodigyplace like this.