Evan's turn for the PHV Prius!

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by efusco, Jul 22, 2010.

  1. Tideland Prius

    Tideland Prius Moderator of the North
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    That's great. Wouldn't it be nice if the nav tied into the car such that it knows how many km (or miles) left to your destination and it knows whether to do the pre-emptive warm-up cycle or to stay off til the range is 0?
     
  2. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Anybody stop you and ask you questions? It should be a great conversation starter at stop lights. I know I would if I see one.
     
  3. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    No one looked twice at me. Only those I told paid any attention. There were a couple times when I wanted to pull up next to another Prius, point to the plug-in cap and say, "it's a plug-in" but I figured they would think I'm crazy. Also, since there are after-market kits, they would have no real way of knowing that it was a "real" Toyota plug-in.
     
  4. efusco

    efusco Moderator Emeritus
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    I've had a few people who's looks seemed to linger longer than usual, but, of course, I start driving this and all the Prii I see on the road every day suddenly disappear! How'm I supposed to show this thing off?!

    Last night's commute to work report--Kind of interesting.

    I chose a 1/2 side road, 1/2 highway route (60mph max). I drove the entire way in EV with the exception of one, brief, highway stretch that is up a fairly long steep 60mph hill--I let the car stay set on 60mph on the cruise control. So, it EV'd up that hill and for a flat stretch until I yeilded and it shut off (ICE temp 117 degrees F)...maybe a total distance of 1/2 - 3/4 mile in HV mode.

    And, again, I was able to drive the rest of the way to work on EV only showing only 0.1 miles of EV range left when I got to work. It, again, did not turn on at 1.6 miles as it did for Tony--apparently since it had already done a partial warm-up cycle during the trip...the ICE temp had dropped to 100 degrees F by the time I parked.
     
  5. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Interesting... people thought it is just another Prius. It may be better for Toyota to market a separate plugin-only model.

    FT-CH size designed with PHV battery pack in the body, allowing room for spare tire.
     
  6. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I am thinking of another strategy. Why don't you start the ICE by strong acceleration while approaching that hill? So by the time you reach the top, ICE can shut off and EV can resume for a flat stretch.

    I would think it is a better use of PHV battery to maximize EV miles.
     
  7. efusco

    efusco Moderator Emeritus
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    Gonna confirm Tony's observation of mandatory ICE kick in at 1.6 miles left of EV range. I ALMOST made it home today in EV, but less than 1/4mile from my house, on the same hill mentioned earlier, I went from 1.8 mile range at the foot of the hill and within 100 yards up the hill it dropped to 1.6 miles and the ICE kicked in...arrived home with 1.4 miles EV left, but the ICE running.
     
  8. TheForce

    TheForce Stop War! Lets Rave! Make Love!

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    If the AMP gauge works on the SG you might want to try to use these amp ranges to keep speed.

    AMPS---MPH
    <15---<25
    20---30-35
    25---35-40
    30---40-45
    40-50---50

    Of course this is all for the gen 2 and what I see with my setup.
     
  9. efusco

    efusco Moderator Emeritus
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    I'll check, lots of the gauges don't work.
     
  10. efusco

    efusco Moderator Emeritus
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    Had an opportunity for a bit of a longer trip today. This morning I had a short errand which did not exceed the EV range--which was nice. But I punched it just a bit too hard pulling out of a parking lot to get onto the road, and ended up kicking on the ICE anyway--which wasn't as nice. I really didn't push that hard, but it must've just broken the threshold.

    This afternoon we took a drive to my lake house and back (~120 miles or so round trip). We started out with a full battery, had one side trip to the post office, then immediately onto 60mph highway. It actually stayed in EV quite well, even on relatively steep/long hills at 60mph--which impressed me. Once EV was depleted it drove just like any other Gen III Prius....

    And here's my technical 'discovery' of the day:
    Before the EV indicator goes off (indicating EV range depletion), the car will coast with ICE-off below 65mph--that's pretty nice and has always been an annoyance that I can't ICE-off coast my Gen II above 41mph. But, once the EV is turned off the system seems to revert to the exact same programming every other Gen III has and you now must be below 46mph to ICE-off glide.

    So, even though the vehicle is clearly capable of ICE-off glide below 65mph, it won't allow it once you're in HV mode with EV battery depletion. Now...why?? I can see no good reason for that. I have to wonder if it's simply a programming issue--that there are 2 sets of firmware--one for EV, one for HV and they simply plugged in the same HV firmware that is in the other/standard Gen III.
     
  11. ksstathead

    ksstathead Active Member

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    Agree, Evan. No reason to protect MG1 rpm at two different thresholds comes to my small mind. I expect that to disappear before production.
     
  12. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Wow, the ICE was at 0 RPM to 64 mph in PHV mode. Someone needs to hack it :) It appears PICC has done it already with their recent gen3 conversion.
     
  13. Tideland Prius

    Tideland Prius Moderator of the North
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    Methinks the threshold has something to do with the PWR region on the HSI.


    WRT to the engine-off feature, I thought below 65mph in PHV mode, it's in EV mode (i.e. it's not gliding, it's stealth). Perhaps in HV mode, the computer isn't programmed to drain the HV portion of the battery. It acts like a normal Prius which would put it in warp stealth.
     
  14. efusco

    efusco Moderator Emeritus
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    Well, the threshold has something to do with the HSI indication...but be that as it may, yes, if you accelerate and the HSI indicator goes into the "power" range that's when the ICE kicks in.


    That is the case, but I don't see why it still wouldn't let the ICE shut off if you're gliding/coasting/whatevering below 65mph as it does in EV mode.
     
  15. efusco

    efusco Moderator Emeritus
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    The Discovery of the Day:
    As Tony 'discovered' and discussed, if you've been driving in EV mode and never broke the threshold to fire up the ICE, when you reach 1.6 miles of EV range remaining the ICE will kick in no matter what to begin the warm-up cycle.

    What I don't think he mentioned is how incredibly sensitive the throttle becomes once you hit that 1.6 mile threshold--and I mean really sensitive. Very subtle movements of the pedal will result in pretty dramatic swings on the HSI almost as it if it wants you to hit the "power" section to start the ice back up. It actually can be quite difficult to use that last 1.6 miles of EV battery range without firing up the ICE again. It tends to extend the battery range b/c you're using the ICE more, but it's sure tough to drag out that last bit in pure EV.
     
  16. linuxpenguin

    linuxpenguin Active Member

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    My best guess is that when the PHEV battery is that low it needs to lower the discharge limits to prevent the PHEV battery from being damaged by low voltage (hence why it mostly uses the gasoline engine in that zone). /If/ that is true, then that might give us some insight in to how great of a DOD% Toyota is using on their extra battery packs.

    Andrew
     
  17. Rokeby

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  18. ukr2

    ukr2 Senior Member

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    Evan, where are you going for 9 months???
     
  19. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    Oh yeah. That reminds me: watch out once the ICE engages because the throttle gets really sensitive. :p
    I had the Hybrid System view up and once that ICE engages, the bar would swing wildly from left to right.
     
  20. efusco

    efusco Moderator Emeritus
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    Australia x ~6 1/2 months and then around the world.

    Ok, my
    Second PHV (mini)Discovery of the Day:
    Tested out B-mode today--in EV mode, dropping into B increases regen but absolutely does NOT kick in the ICE at any speed! Cool. Guess it figures there's plenty of room to regen or something.

    Final PHV note today:
    I had a lot of commuting, logged over 85 miles on the PHV over the course of the day starting with a 9am 25ish mile errand (full charge to start), then a trip to town for lunch (8 mile EV showing after partial charge)--~20 miles more. Then finally another fully charged ~30 mile trip (ok, my numbers are off somewhere, but I reset Trip A this morning and now it shows 85 miles--so that part is right).

    In any case, I held 99.9mpg for the day right up to the last 5 miles or so on the way home (cold start, no EV) and the Trip A mpg began to slowly drop. Ended up home with 96.4mpg on the Trip A HSI.

    Had I had a 220V charger (incomplete 2nd charge would have been a full charge) it would have been over 100mpg, but probably not a whole lot higher. Still, even with all that driving, a 13 mile range makes a difference. I think that normally I'd be right at 60mpg in my Gen II Prius for the same commute--and I was using the air conditioning in the PHV much more liberally than I do in my Gen II and took highway on a couple stretches where normally I'd have been on back roads.

    I think this is a great statement to what even a short EV range PHV can do for your real world fuel economy...color me happy.:D:rockon:
     
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