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Prius Prime Plus in my hands

Discussion in 'Prime Main Forum (2017-2022)' started by bwilson4web, Jan 19, 2017.

  1. Rebound

    Rebound Senior Member

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    The LiIon battery lasts longest in a moderately discharged state. Not fully discharged (which a Prius won't allow), but moderately discharged, between 20-40%.

    Therefore, I disagree with your suggestion that the cars should be fully charged at the factory, on the boat, etc. The dealer should do it before customer delivery. I don't think it's ideal for the car to be fully charged and undriven for potentially several months.

    As a rule, I prefer to charge my car in the morning (with a timer, if possible) and drive it to depletion.
     
  2. inferno

    inferno Senior Member

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    Prime cheaper to drive in electric at 18 cents kWH than gas @ $2.00. With my PiP it was more expensive to drive in electric (not counting my Solar production).

    Doesn't Toyota not allow fully charged batteries anyway? Am I wrong?
     
  3. EV-ish

    EV-ish Active Member

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    About 5.5 of of the nominal 8.8 kWh is used
     
  4. bisco

    bisco cookie crumbler

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    even so, they would go against there own recommendations if they charged them at the factory.
     
  5. bisco

    bisco cookie crumbler

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    what mpg are you comparing your 32 miles of ev to? in my pip, i use 15 miles ev and 60 mpg. so maybe $2.30 for 60 miles of electricity?
     
  6. bwilson4web

    bwilson4web BMW i3 and Model 3

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    So I climbed Brindley Mountain (Dixie Hwy) 525 ft (160m) 8% grade at 55 mph and burned about 0.12 0.08 gal. The descent at 55 mph added 6% to the SOC. Again, my impression that the last 20-25%, the rate of charge seemed to moderate. All under cruise control and ECO mode.

    Bob Wilson
     
    #206 bwilson4web, Feb 22, 2017
    Last edited: Feb 23, 2017
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  7. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Ok, here is the updated chart:
    [​IMG]
    This includes the ad hoc metric after the car was throughly warmed up.

    Bob Wilson
     
  8. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I am expecting one more report but here is the initial report:
    1. silicon content - disregard as both the engine and P610 transaxle use a silicon sealant. Beads on the inside break off and leach into the oil. In other cases, one would worry about dust/dirt BUT we know the sealant is the problem.
    2. engine oil and filter - both show molybdenum which is sad to say, a potentially conductive layer that makes it unsuitable for the P610 transaxle. Molybdenum grease is often used when assembling engines so this is nothing to worry about.
    3. engine oil copper - this is probably from the cam chain, crank shaft, and piston pin bearings. Initial wear, not a big problem if subsequent tests show the rate of increase per service mile is constant or tapering off.
    I have seen worse suggesting Toyota may have improved their manufacturing processes and/or the P610 is easier to assemble cleanly. Regardless of cause, I'm pretty happy.

    Bob Wilson
     

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  9. bisco

    bisco cookie crumbler

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    bob, are your mpg's based on strict hybrid use with no wall charge?
     
  10. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Correct!

    I need to know how to manage the fuel on a cross-country trip. My current thinking:
    1. Use EV when cold and slow - the car gets up to speed without putting a load on an engine that will be inefficient until warmed up.
    2. Reach cruise speed w/o expected stops and enable HV - the engine will come on and begin a warm-up cycle. During this time the EV battery level will decline a little and then recover. At this point the engine is working at peak efficiency.
    3. HV cruise as long as possible - this gets the maximum MPG for the fuel burned.
    4. Deceleration will add to battery - nice but don't inflate the value.
    Bob Wilson
     
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  11. bisco

    bisco cookie crumbler

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    70 mpg at 55 mpg is incredible. but i guess all my testing includes warm up and some side streets, so i don't know the actual steady state pip value.
     
  12. Gen 3 for me

    Gen 3 for me Member

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    I agree with your 4 and would add
    5) to not use cruise control unless the road were flat. I mean to keep your potential energy when going down hill (within reason for legal and safety reasons) and use that extra momentum for making it up the next hill fast when you first approach the hill and gradually decrease the load on the engine or traction battery as you climb the hill going slower and slower until you reach the hill peak at which point you can begin accelerating faster and faster down the next hill.
    6) You are already doing with higher tire inflation pressure.
    7) Remove unneeded weight. Just use the drivers floor mat. The carpeted version weighs 0.9 lb, the all weather version weighs 2.2 lbs. The complete carperted set including cargo are is 5.2 lbs, the all version complete set including cargo is 13.6 lbs. Leave out the tonneau cover. The light weight version is 0.8 lb, the roll shade type in the advanced model is about 3.8 lbs (based on a 2015 Prius that is very similar). Some of the manuals may not be needed, as well as the silver engine beauty cover.
    8) Keep the windows closed but dress appropriately to avoid using the AC.
    9) Just fill the gas tank half way on a refill to save weight and allow stretch breaks.
    10) Stay at motels that have the door on the outside of the room and try to stay in a less populated area of the motel so you could recharge the traction battery overnight by parking right in front of your door. Or find hotels that will guarantee you a charging port.
    11) Drive on 2 lane state highways at 50-55 mph were possible, rather than interstates.
     
  13. bwilson4web

    bwilson4web BMW i3 and Model 3

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    It took me several tries in 2005-06 with our Gen-1 to figure out the warm-up problem. The transmission was the hardest until I made a drain-plug with a thermistor ... 20 minutes is what it takes.

    Bob Wilson
     
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  14. bwilson4web

    bwilson4web BMW i3 and Model 3

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    We'll have to take different paths here. I sold our Gen-3 to get TSS-P with dynamic cruise control so I can use other traffic as pacing vehicles. It is NOT drafting but there is a volume of air that has some forward motion. We'll call it 'less headwind' and free with dynamic cruise control.

    Bob Wilson
     
  15. Lee Jay

    Lee Jay Senior Member

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    That's drafting. Which is fine, but it is drafting.
     
  16. Gen 3 for me

    Gen 3 for me Member

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    Bob, I had not considered that. I see your point. I'm so used to not having dynamic cruise control.

    Do you use dynamic cruise control on the least sensitive setting,1 bar showing on MID, allowing you to get closest to car in front, as opposed to 2 or 3 bars, to get the best mpg result.
     
  17. bwilson4web

    bwilson4web BMW i3 and Model 3

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    It varies. On 1 bar, it is blind to stopped traffic which means coming up so fast you get the BRAKE alarm. On 3 bar, it can be slow to accelerate when stopped. So I adjust to match the traffic.

    On the highway, I like 1 bar but if it looks like the trucker is 'checking me out', I'll back off to 2 or 3 bars. I am not on the road to cause others any grief.

    Bob Wilson
     
  18. Prodigyplace

    Prodigyplace Senior Member

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    On the Gen 4 Liftback DRCC acceleration is tied to the driving mode. Eco is much too sluggish for DRCC. The regular cruise on these models always has brisk acceleration. That is part of the reason I drive my Liftback in Normal instead of Eco. I am considering a switch to Pwr mode.
     
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  19. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I had not tried the other modes but it makes sense about acceleration.

    Bob Wilson
     
  20. Prodigyplace

    Prodigyplace Senior Member

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    I sort of wish it was configurable whether to use driving mode or not. I understand that some criticized the older DRCC because it did not change with driving mode.

    I wonder if the Prime acts the same as the Liftback.