CleanMPG Reviews the 2011 Chevrolet VOLT - Review Blog

Discussion in 'In the News' started by xcel, Jun 10, 2011.

  1. Re: CleanMPG Reviews the 2011 Chevrolet VOLT Review Blog

    Interesting. That seems kind of early for MG1 to clutch in, which is the only thing I could think of that would give that feeling. I can't say I've noticed it but I'll start paying attention.

    BTW, I remembered an interesting thread on gm-volt. Several people were theorizing about what feels like a "downshift" when you accelerate hard at highway speeds. It turns out that you're feeling the delay as MG1 slows down, stops, and declutches while the ring gear gets clutched to the case, shortening the effective ratio for better acceleration. A reader who has access to the diagnostic software provided the data.

    Anyway, this is the data I found interesting in light of your steady state highway testing:
    94km/h is 58mph. 33.3A @ 360V = 11.99 kW, which 10.4 kWh (usable pack size IIRC) of energy could sustain for 52 minutes, permitting 81.5km, or 50.5 miles, which has a familiar ring to it. :) The poster did say the current data was noisy though. It may just happened to have worked out in this case.
     
  2. xcel

    xcel PZEV, there's nothing like it :) Staff Member

    Re: CleanMPG Reviews the 2011 Chevrolet VOLT Review Blog

    Hi AnotherVotlOwner:

    I found your MG1/MG2 current finds and calcs almost spooky close to the actual highway drive at 50.9 miles AER.

    Wherever you found them, do you have more at different speeds under CD mode as they provide really good data points for varying steady state ranges.

    Wayne
     
  3. Re: CleanMPG Reviews the 2011 Chevrolet VOLT Review Blog

    Wayne,

    I wish I did. I provided a link to the post where I got the information. Unfortunately, it was a single snapshot.

    Somewhere in GM is a very nice curve showing power vs. speed in steady state operation, but we'll never see it. :) Hopefully, some enterprising nerd will use the diagnostic software to create one for the rest of us.
     
  4. xcel

    xcel PZEV, there's nothing like it :) Staff Member

    Re: CleanMPG Reviews the 2011 Chevrolet VOLT Review Blog

    Hi AnotherVoltOwner:

    Thank you for what you did find :)

    Wayne
     
  5. herm

    herm Well-Known Member

  6. xcel

    xcel PZEV, there's nothing like it :) Staff Member

    Hi Herm:

    I hope so as I loved the Converj when I first saw it in Detroit a few years back and it made perfect sense to be in a small luxury machine vs. a FSP of a V8.

    Wayne
     
  7. Harold

    Harold Well-Known Member

    Very nice styling! Looks great. H
     
  8. philmcneal

    philmcneal Has it been 10 years? Wow

    hey for the volt's navigation does it include traffic re-routing? I found that is the best feature for cars today instead of puttering along slowly on the highway.

    It's a shame after watching the video on the volt wayne posted, it wasn't as quiet as the 04 prius I had previously... hopefully the production version of the PHEV prius will be a game changer and perhaps a price cut for the volt :)

    perhaps I missed during the review, did you managed to do a 55 mph in CS mode and see what mpg you got? I know you quoted 58 mpgUS but not sure if that was entirely highway or all city.
     
  9. Kacey Green

    Kacey Green Well-Known Member

    The 2012s do, if not all nav equipped models
     
  10. herm

    herm Well-Known Member

    The Volt forum posts a very detailed thread on regen efficiency, they get 83% efficiency .. that is very high.

    http://gm-volt.com/2013/01/01/a-detailed-look-at-regeneration/

    another interesting tidbit is that there is no clutch wear on the Volt, all the clutches are engaged at zero gear rpm. Go check this thread out..
     

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