Steady State Speed vs Fuel Economy results

Discussion in 'General' started by seftonm, Mar 22, 2014.

  1. RedylC94

    RedylC94 Well-Known Member

    That looks like it can't, at any constant speed, touch the efficiency Gord is typically scoring .

    At what stage is energy measured for those numbers---leaving the battery, going into the motor, or where? There must be sizeable losses between the kw-hr meter used for billing (if one is charging at home) and the motor input.
     
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  2. xcel

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

    Hi RedylC94:

    Public Chargers measure the energy from the charger. There are losses going into the vehicle of course.

    The Taycan is a completely different animal when comparing to Gord's Model 3. I have never completed a Speed vs Energy Consumption with a Model 3 so I am not sure.

    Wayne
     
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  3. RedylC94

    RedylC94 Well-Known Member

    Certainly, but at what stage is power typically measured for short-term distance-energy ratios like those in your graph, or Gord's short trips? Battery output or motor input, or something else?

    Thanks!
     
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  4. xcel

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

    Hi RedylC94:

    Speed vs Fuel or energy is always measured vs the onboard storage. I cannot measure losses upstream

    The Taycan's results however show that its rated efficiency and range fall far short of actual.

    Wayne
     
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  5. seftonm

    seftonm Veteran Staff Member

    That's impressive! I've read in a few places that the Taycan's range is underrated, but it's nice to see it confirmed with your usual attention to detail.
     
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