1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Prius Marathon Run

Discussion in 'Gen 2 Prius Main Forum' started by efusco, Jul 31, 2005.

  1. Ray Moore

    Ray Moore Active Member

    Joined:
    Mar 28, 2004
    857
    52
    0
    Location:
    Texas Hill Country
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I see you're from CA. Perhaps it was one of those flachbacks you were promised. Just a thought.
     
  2. Godiva

    Godiva AmeriKan Citizen

    Joined:
    Apr 8, 2005
    10,339
    14
    0
    Location:
    San Diego, CA
    Vehicle:
    2005 Prius
  3. IsrAmeriPrius

    IsrAmeriPrius Progressive Member

    Joined:
    May 27, 2004
    4,333
    7
    0
    Location:
    Southern California
    Vehicle:
    2005 Prius
    California Vehicle Code Section 21710:

     
  4. Godiva

    Godiva AmeriKan Citizen

    Joined:
    Apr 8, 2005
    10,339
    14
    0
    Location:
    San Diego, CA
    Vehicle:
    2005 Prius
    But we can drive barefoot, right?

    BTW....how can they see what gear I'm in?
     
  5. efusco

    efusco Moderator Emeritus
    Staff Member

    Joined:
    Nov 26, 2003
    19,891
    1,191
    9
    Location:
    Nixa, MO
    Vehicle:
    2004 Prius
    Model:
    N/A
    It is possible to ICE-off glide up to 41mph, but anywhere above that the ICE will at least spin even if no fuel is being consummed. Also, beyond 41mph it is exceptionally difficult to get a 'no-arrows' glide and sustain it.

    I generally use the upper limit of 39mph for my acceleration before glide as well...that gives a slight cushion in case I gain a little momentum on a down-hill or something so I don't exceed that 41mph limit and force the ICE to spin.
     
  6. tomdeimos

    tomdeimos New Member

    Joined:
    Feb 16, 2004
    995
    2
    0
    Location:
    Lexington, MA
    OK what if someone wanted to try that Marathon route to see how they could do in their Prius, but without the special mods to tires and oil?

    Can anyone figure the target mpg to shoot for if you had a regular car with 42/40 good tires and regular 5W/30 oil in it?
     
  7. efusco

    efusco Moderator Emeritus
    Staff Member

    Joined:
    Nov 26, 2003
    19,891
    1,191
    9
    Location:
    Nixa, MO
    Vehicle:
    2004 Prius
    Model:
    N/A
    I asked Dan about that, he said they did it with CC on most of the time and got around 85mpg. I asked about having a "normal driver" do it, he said they could find one!
     
  8. Danny

    Danny Admin/Founder
    Staff Member

    Joined:
    Nov 24, 2003
    7,093
    2,100
    1,174
    Location:
    Charlotte, NC
    Vehicle:
    2013 Prius Plug-in
    Model:
    Plug-in Base
    Wow, unfortunately I missed most of this from the weekend due to company being in town, but it's been great to catch up on it this morning!

    Do you know if we can get any hi-resolution photos of the group or the car for the 2006 PriusChat Calendar?
     
  9. efusco

    efusco Moderator Emeritus
    Staff Member

    Joined:
    Nov 26, 2003
    19,891
    1,191
    9
    Location:
    Nixa, MO
    Vehicle:
    2004 Prius
    Model:
    N/A
    There are some photos posted elsewhere, unfortunately the quality is someone lacking. I'll ask the guys if they have one they think would be good.
     
  10. hdrygas

    hdrygas New Member

    Joined:
    May 22, 2004
    3,650
    6
    0
    Location:
    Olympia Wa
    Vehicle:
    2004 Prius
    efusco, Can you explain the "dead-band" thing a bit better. I have gotten pumped after this and have been expermenting with it. I can get the ICE and MG1 to run sending power to either the battery or MG2. I can not get the ICE to run alone at city speeds (50-25mph) Is the dead band you are talking about when the ICE is driving MG1 and powering MG2 but not involving the battery at all, either in or out? I want to push the car above the low to mid 50 mpg.
     
  11. Ray Moore

    Ray Moore Active Member

    Joined:
    Mar 28, 2004
    857
    52
    0
    Location:
    Texas Hill Country
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    dead band acceleration is when there is no energy flow to or from the battery. I think that if it is teetering on the edge and going back and forth between to and from the battery then you are doing great. very little flow to and from the battery is almost as good as none.
     
  12. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    498
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    I have learned a lot as a result of participating in the marathon.

    The first thing that we could all agree on is that there seems to be no correct way to accellerate. The Prius is very forgiving as long as you keep acceleraton within the 15 - 50 MPG range. Maybe the range is even wider but we did not try anything outside. Rick used 15-20 for his 115 MPG shift, I used 25-35 for my 115 MPG shift and Wayne used 40-50 for his 120MPG shift. The extra 5 MPG was more likely due to gliding down to much lower speeds than Rick or myself.

    What I found best for my style was not deadband at all. It was what I call "accelerate with charge". I found that during the night the headlights made it difficult to maintain the HV battery charge so I had to revert to "accelerate with charge", pink arrows from ICE to wheels, green arrows from MG to battery, no orange arrows at all. This kept the battery level steady. I continued this technique on my second shift in the daytime and found that I had an abundance of charge (no headlights) and I could actually use stealth to help me over small hills instead of using the ICE. This is how I went from 105MPG to 112 MPG. So much for my deadband habit.

    Another habit that I broke was to glide partially up a hill and then switch to ICE power to pulse the rest of the way up the hill. I switched to DWL (drive with load) in which I switched to ICE power as I approached the hill, held the gas pedal steady at 50-60MPG while I slowly bled off the speed, targeting 32MPH at the peak of the hill.

    Combining those two changes, on my last shift, I was over 117 MPG before I decided it was time to end this marathon. Unfortunately I made that decision about 3 miles too early.

    Dan
     
    1 person likes this.
  13. dreichla

    dreichla New Member

    Joined:
    Feb 21, 2005
    2,230
    0
    0
    Location:
    Connecticut
     
  14. Ray Moore

    Ray Moore Active Member

    Joined:
    Mar 28, 2004
    857
    52
    0
    Location:
    Texas Hill Country
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Dan- I agree with everything you just said from my experience. The problem is that we have to compromise to keep other drivers happy so accelerate with charge is usually too slow.

    I would really like to see you achieve 128 MPG so we can claim one mile per ounce of gas. This latest effort got one miler per 1.17 ounces of gas.
     
  15. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    498
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    Next stop, one mile per tablespoon!
     
  16. ltu1542hvy

    ltu1542hvy New Member

    Joined:
    Nov 10, 2004
    338
    0
    0
    Location:
    Cotonou, Benin
    Vehicle:
    Other Non-Hybrid
  17. ehurtley

    ehurtley Junior Member

    Joined:
    Aug 10, 2005
    54
    0
    0
    Location:
    Portland, OR
    That would be a bit extreme, as that would be 256 miles per gallon.

    On a side note, I just registered (I've been over at PriusOnline for a while, and have read PriusChat for a while, but just registered,) and have to say one thing:

    I went to college with the commander of the Space Shuttle (Eileen Collins,) and know her as an 'acquaintance'; yet I was more enrapt by this feat of eco-friendliness by total strangers than by the status of the shuttle landing!
     
  18. vincent1449p

    vincent1449p Active Member

    Joined:
    May 24, 2004
    894
    331
    0
    Location:
    Singapore
    Vehicle:
    2012 Prius c
     
  19. ken1784

    ken1784 SuperMID designer

    Joined:
    Dec 18, 2003
    2,940
    1,359
    67
    Location:
    Yokohama, JAPAN
    Vehicle:
    2010 Prius
    Model:
    N/A
    Hi Vincent,
    Thank you for the nice spreadsheet.

    I don't understand what is the exact problem, but I'm going to try to solve...

    There is an ICE-ON distance counter internally on SuperMID, but the distance is not displayed because of lack of display space.

    For example, from the first Dan's data...
    Fuel used: 4.501 L
    ICE-ON FE: 12.41 km/L
    ICE-ON distance: 4.501 X 12.41 = 55.86 km (hidden ICE-ON distance)
    then
    Percent ICE-ON: 55.86 / 200.38 = 0.279 or 27.9%

    Is this calc clear for you?

    Ken@Japan
     
  20. tochatihu

    tochatihu Senior Member

    Joined:
    Apr 10, 2004
    8,973
    3,501
    0
    Location:
    Kunming Yunnan China
    Vehicle:
    2001 Prius
    Vincent, your spreadsheet is just as I was trying to develop, except you have kept in some of the seconday info I had skipped. Yours is better.

    Do you approve if I post it on other Prius groups with credit to you?

    DAS