Revisiting hill climb and descent

Discussion in 'Tesla' started by bwilson4web, Jul 17, 2021.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
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    Location:
    Huntsville AL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Test Vehicle
    • 2019 Std Rng Plus Model 3, Odometer 49824 mi
      • Version 2021.4.18.2
      • 4,000 lbs weighed in 2019 at truck stop scale
      • 18" Bridgestone ECOPIA, light weight rims, 50 psi
    Test Protocol

    • 73 F, 4:30 AM, no wind, dry pavement, 63 mph, Autopilot steering and speed control
    • Flat segment:
    • [​IMG] upload_2021-7-17_7-27-4.png
      • 1st pass: 1.5 mi, 229 Wh/mi
      • 2nd pass: 1.4 mi, 226 Wh/mi
    • Hill climb and descent:
    • upload_2021-7-17_7-28-12.png
    • Climb: 1.4 mi, 776 Wh/mi ~= 1,086 Wh
    • Descent: 1.5 mi, -241 Wh/mi (charged) ~= -239 Wh
    • ~2.9 mi, 847 Wh, ~292 Wh/mi
    • 292 - 228 ~= ~64 Wh lost ascending and descending 525 ft hill
    • 121.9 Wh / 1000 ft or ~0.53 miles / 1000 ft
    Vehicle energy graph:
    upload_2021-7-17_7-28-51.png

    I do have the original photos. Questions?

    Bob Wilson
     
    #1 bwilson4web, Jul 17, 2021
    Last edited: Jul 17, 2021
  2. Moving Right Along

    Moving Right Along Active Member

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    I’m assuming you mean watt hours and not kilowatt hours. Were the results roughly what you expected to see?
     
    bwilson4web likes this.
  3. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
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    Location:
    Huntsville AL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Thank you! Fixed units.

    I had no expectations beyond knowing hills have a modest effect because regeneration on descent is so effective. So we have foothills to the East towards Atlanta; the Piedmont plateau to the North towards Nashville, and some modest hills in Western Arkansas going towards Joplin. Past experience has shown my Tesla Model 3 handles them easily.

    Bob Wilson