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Full, sustained glide at 60mph

Discussion in 'Gen 2 Prius Fuel Economy' started by nooaah, Dec 17, 2008.

  1. nooaah

    nooaah New Member

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    I've done this 10 times now. The last time lasted well over a minute and the only reason it stopped was because I hit the wrong end of the incline and had to accelerate. The screen was completely black each time.

    I had music on and couldn't hear the engine over that and the wheels. I am not able to reproduce this intentionally. It just happens every other week or so. Anyone else get a full on glide at high speeds and knows how to do it or is my MFD energy monitor on the fritz?
     
    #1 nooaah, Dec 17, 2008
  2. bestmapman

    bestmapman 04, 07 ,08, 09, 10, 16, 21 Prime

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    Above 42 MPH the MFD is running all the time. It does so as to prevent overspeeding of MG1. What you see on your screen is a simplified version of a power transmission graphic that the computer is doing at that moment. It does not show RPM of the ICE. To see that you need another gauge such as a scan guage II.

    It sounds like what you are trying to do is achieve what we call glide below 42 MPH. In this state, the ICE shuts down and there are no arrows on the screen. This of course assumes that the engine in warmed up and you are in S4 or above 43 MPH in S3.

    Above 42 MPH the ICE is always spinning. The simplist thing that most of have found to do and the easiest to enter is a mode that we call Warp Stealth. This is above 42 MPH, with the Go pedal feathered to show only the yellow power line.

    The screen isn't lying to you, it just isn't giving you all the information.

    This is the short answer. Hope this helps.
     
    #2 bestmapman, Dec 17, 2008
  3. nooaah

    nooaah New Member

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    I know what a glide is, that's why I'm baffled that I've seen a completely blank screen so many times at over 55mph...I also know how to do warp stealth (I do that daily). This is what I saw (not my pic, just to illustrate that I know what a glide is):

    [​IMG]
     
    #3 nooaah, Dec 17, 2008
  4. efusco

    efusco Moderator Emeritus
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    That is, by definition, warp stealth...just with a balance of energy flow below the threshold displayed. You'll really only ever see that when your battery SOC is above ~57% at speeds over 42mph.

    Your ICE is spinning, but there is no fuel flow and thus you can't hear it running. But it's not a true stealth b/c the ICE is spinning.
     
    #4 efusco, Dec 17, 2008
  5. bestmapman

    bestmapman 04, 07 ,08, 09, 10, 16, 21 Prime

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    Also, the MFD screen is an approximation of what is going on. Since you are not using power from the ICE and very little AMPS from the battery, no arrows are displayed. If you had a scanguage or Can View it is easy to see this condition.

    Like Evan said, you are in Warp Stealth, just not using much power from the battery.
     
    #5 bestmapman, Dec 17, 2008
  6. Bob64

    Bob64 Sapphire of the Blue Sky

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    The only way to do a full "glide" with ICE off at 60mph is to accelerate down a hill, with the ICE off before you hit 40mph, then shift into neutral before 41mph (41mph + causes the ice to turn on). Neutral prevents changes to the state of the ICE. (keeps it on or off).

    There are two "warp stealth"s

    The one with yellow arrows draining the battery at approx 6-15amps or a very lightly feathered warp stealth which draws no amps from the battery. You're seeing the second one.
     
    #6 Bob64, Dec 17, 2008
  7. nooaah

    nooaah New Member

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    Alright, I figured the energy screen wasn't showing me the whole story. Thanks. :)
     
    #7 nooaah, Dec 17, 2008
  8. Celtic Blue

    Celtic Blue New Member

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    Yes, it is charge dependent from what I've seen. If I have a high enough charge I can get into this mode on the highway if the grade and speed are right (last time I saw this was at 70 mph.) As you slowly burn off some charge in this mode (even though the powerflow is not displayed as it is below the threshhold) the throttle range that will allow this shrinks until you can't get back into now arrows warp glide.

    I really like the way the throttle responds at higher than target states of charge. The jittery/hunting aspect goes away.
     
    #8 Celtic Blue, Dec 17, 2008
  9. [H]ackerK

    [H]ackerK Geek

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    interesting. once in a while during summer time, I have seen my prius doing about 100-110km/h but on battery power only. Is that normal? And what happen to the ICE, is it spinning w/o fuel?
     
    #9 [H]ackerK, Dec 18, 2008
  10. efusco

    efusco Moderator Emeritus
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    Yep, it's being spun by MG1, no fuel flow
     
    #10 efusco, Dec 18, 2008
  11. ken1784

    ken1784 SuperMID designer

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    I can read "Energy Monitor" on the MFD screen.
    It doesn't say "ICE Status Monitor".

    Ken@Japan
     
    #11 ken1784, Dec 18, 2008
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