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P&G 45-60 mph

Discussion in 'Gen 3 Prius Fuel Economy' started by bwilson4web, Jul 23, 2009.

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Is P&G effective in a 45-60 mph test?

Poll closed Jul 30, 2009.

  1. 45-60 P&G will do better than 53 mph cruise control

    5 vote(s)
    45.5%

  2. 45-60 P&G will equal equivalent 53 mph cruise control

    2 vote(s)
    18.2%

  3. 45-60 P&G will do worse than 53 mph cruise control

    2 vote(s)
    18.2%

  4. P&G requires speeds at or below 46 mph to work at all

    4 vote(s)
    36.4%

  5. Cruise control pulse or "N" glide is not P&G (explain what is)

    0 vote(s)
    0.0%
Multiple votes are allowed.
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  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    No, I don't but I'm not sure I need one and I've bought some parts for another approach.

    Bob Wilson
     
    #21 bwilson4web, Jul 26, 2009
  2. FireEngineer

    FireEngineer Active Member

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    Bob, you need one if your going to get any kind of good data, the HSI is not a very good indicator and it is not consistant for given conditions.

    Wayne
     
    #22 FireEngineer, Jul 26, 2009
  3. DaveinOlyWA

    DaveinOlyWA 3rd Time was Solariffic!!

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    Bob; one thing i have noticed is that with all things equal (i drive pretty much the same routes over and over and over. ya, i have no life!!)

    the SOC also determines the instantaeuous mpg. i can be on a flat road holding the line on the HSI in ECO mode and as the SOC goes up, the instant MPG rises as well.

    obviously the amount of charge going back to the battery at any output level is constantly changing as well.
     
    #23 DaveinOlyWA, Jul 28, 2009
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Prime Plus
    I agree and found that a 25% power bar, the car tended to use a lot more battery energy than expected. In fact, my first run was all battery.

    What I'll have to do for the 25% power bar mode is read the traction battery current with the engine off to get the actual 'power to the wheels.'

    I've temporarily started using my wife's 2010 to check the Trip A vs Trip B vs tank mileage data. This will take about a week and then I'll get back to measuring the P&G for her 2010. I don't have enough trip meters to do both sets of tests at the same time (wishful thinking: Can we get sets of trip meters per keyfob so we can keep our 'significant others' mileage apart from ours?) <GRINS>

    Bob Wilson
     
    #24 bwilson4web, Jul 28, 2009
  5. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Sorry but I made a mistake on the ZVW30 test. Instead of a peak speed of 60 mph, I used 65 mph by accident. Yet curiously, the average speed seemed to be similar to the cruise control speed:

    Column 1 Column 2 Column 3 Column 4 Column 5
    0 model direction method MPG mph
    1 ZVW30 East cruise 70.2 53
    2 ZVW30 West P & G 54.6 54
    3 ZVW30 East P & G 57.7 54
    4 ZVW30 West cruise 64.7 53
    I'll have to analyze the GPS data to confirm speeds. But some observations:

    • P & G - seemed to run down the traction battery causing the subsequent cruise control leg to spend the first mile or so putting a charge back on the battery
    Again, my apologies for screwing up the protocol. I really should have stopped at 60 mph, not 65 mph on the pulse. However, the ZVW30 does seem to do pretty good compared to our NHW11. Still, the GPS data is interesting:
    [​IMG]

    Bob Wilson
     
    #25 bwilson4web, Aug 15, 2009
    DomoDriver likes this.
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