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My EV Driving ratio

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by usbseawolf2000, Oct 31, 2012.

  1. bisco

    bisco cookie crumbler

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    and climbing!:D
     
  2. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Yea, despite the colder weather. It'll be interesting to find out where it will settle.
     
  3. john1701a

    john1701a Prius Guru

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    The cold season is quickly becoming a fascinating topic for me.

    Today started with the Prius sitting outside all night, in temperatures below freezing and no plug. It warmed up a little, so the precipitation was rain rather than snow. Good thing too; otherwise, it would have been several inches. As the temperature dropped, it did indeed change to the white fluffy stuff. Fortunately, that was short lived. My morning drive was just ordinary HV mode. After lunch, I got a chance to recharge.

    With the temperature at 27°F, running around town was a mix of EV and HV. Being able to choose when, is nice. You have to remember to shut off the heater when you park though. Otherwise, you only have 7 seconds after starting to. If you don't, the engine fires up. But then again, it's cold enough to need the heater anyway.

    The total distance today was 45 miles. The resulting average was 59 MPG. To my delight, the EV distance was 12 miles. When the engine runs, excess power is directed to the generator. The result is more electricity available when driving. So, it looks like the loss of capacity due to the cold is made up for by the need to run the engine.

    I'm quite pleased with the results. Now I'm especially curious to find out what my commute brings in the winter. Being able to recharge at work will deliver remarkable efficiency, despite the cold.
     
  4. John H

    John H Senior Member

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    something to keep in mind when pursuing higher EV ratios with daily drive cycles greater than 10 miles.

    Results in Figure 8 consider just a
    single recharge of the battery per day. Charge/dischargethroughput
    of the small PHEV10 battery, which will be
    shown in future work, can increase significantly when
    multiple recharges/day are considered. This would shift much
    of the histogram in Figure 8a to the right, representing a more
    severe cycle-life requirement.

    http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/53817.pdf
     
  5. drinnovation

    drinnovation EREV for EVER!

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    Interesting data.. though not really anything about EV ratio. 12/45 is 26% EV..
    12 EV miles at that temp sounds pretty good, but maybe it was just the easy miles as the ICE MPG was bad.
    45 miles at 59MPG is .763 gallons, or with 12miles EV, 43MPG on ICE -- so you paid for the EV miles elsewhere. 59MPG sounds like regular hypermiler results, not Plugin. Do you really think 59MPG over 45 miles good?
     
  6. usbseawolf2000

    usbseawolf2000 HSD PhD

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    43.4 MPG for ICE efficiency is pretty good considering the car was parked outside in 27 deg F temp. A regular Prius would probably get the same in that condition.

    12 EV miles certainly shows that despite the temp/condition, the battery provide meaningful and measurable result. I see this as an example of battery and ICE working together as a team to cover each other's weakness.

    The range of a BEV would suffer greatly under this condition, if the battery has to work alone.
     
  7. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I have reached 40% EV and 60% HV.

    With Torque running, I tried to trigger the ICE in EV mode to see the max amp I can draw from this sucker.

    It hit 196.3 amp and the voltage was around 209v. That's 41 kW or 55 hp.

    The gas engine is rated 98hp @5,200 rpm so 55hp would be around 2,900 rpm assuming the torque curve is flat. At that rpm, ICE would start to roar.
     
  8. RBooker

    RBooker Member

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    Update:
    Est. miles 502
    EV:HV 65:35
    EV 328 miles 86 Kwh
    HV 174 miles 4 gallons

    Not bad considering the cool temps. My goals is 75% EV!
     
  9. john1701a

    john1701a Prius Guru

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    Where?
     
  10. lensovet

    lensovet former BP Brigade 207

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    Here's my ratio so far
    275 EV, 983 HV
    75 kWh, 20 gal
    Fuel saved 6.4 gal
    Note that this includes a 652-mile drive from Oregon at 75-80 mph speeds with an empty charge at the beginning. If we take that out, it's 275 EV/331 HV, or 45%.
     

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  11. lensovet

    lensovet former BP Brigade 207

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    btw, i recently discovered a really easy way to do this while waiting at a light. put the car in D. one foot on the brake, floor the accelerator with the other. engine will kick on even when you have plenty of charge left. was actually surprised this worked given the acceleration debacle toyota had.
     
  12. usbseawolf2000

    usbseawolf2000 HSD PhD

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    That's the force charging mode. I'll check the amount of amp pulled from the battery before the ICE kick in. I doubt it'll discharge 55 hp because if I let go of the brake, the car may smoke the tires. :)
     
  13. RBooker

    RBooker Member

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    Upstate NY, we had a 10 days with highs in the 35 to 45 range.
     
  14. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I have over 1,000 miles now and the ratio is down to 33% EV and 67% HV. I have been driving more due to holiday and a brother visiting.

    Yesterday, I drove him and his gf to Roosevelt Island to see the view of both Manhattan and Queens for great photos. I used EV miles on the Island. We then headed to the Central Park. I used gas climbing the Queens Borough bridge and downhill and the rest of the miles in Manhattan are on EV. I made it out of Manhattan with a few EV miles to spare.

    Loving it :D
     
  15. Jonas Studebaker

    Jonas Studebaker Junior Member

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    Very impressive indeed. My EV to HV ratio is 6% to 94% after six weeks. My charger timer is set to charge from 1am to 4am. Will it charge in the afternoon without me having to manually reset the timer?
     
  16. lensovet

    lensovet former BP Brigade 207

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    The timer is activated only if you press the corresponding button on the dash. If you don't press the button, the car will start charging immediately upon being plugged in.
     
  17. Jonas Studebaker

    Jonas Studebaker Junior Member

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    Thank you. I assume that after three hours of PiP charging, my home's electric meter slows down.
     
  18. bisco

    bisco cookie crumbler

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    i'm closing in on 50/50 after 6,000 miles. the only strategy is to charge whenever possible. i do less long distance driving in winter so ev is catching up from 44/56.
     
  19. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Update: My lifetime (2 months) is at 40% EV and 60% HV.

    About 264 Wh/mi (15% charging loss included) and about 55 MPG on gas. I LOVE this car!

    image (1).gif

    Bought it on Oct 20th and MPG (electric miles included) is on the rise:

    image (2).gif
     
    Jeff N likes this.
  20. bisco

    bisco cookie crumbler

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    i'll be getting gas on friday and posting my spectacular results!:D