Pulse and Glide

[dcoyne78]

103 mpg for 47.8 miles round trip using pulse and glide

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Started at 508.9 miles 75 MPG on display, 6.785 gallons used since last fill, round trip segment to 556.7 miles 76.8 MPG , 7.248 gallons used since last fill. 47.8 miles for segment .463 gallons used, 103 mpg

trip od MPG--gal--miles--gal---MPG
--------disp--s/fill---------seg---seg
508.9 75.0 6.785
532.8 75.9 7.019 23.9 0.234 101.949
556.7 76.8 7.248 47.8 0.463 103.158

Pulse and glide does work, but it is not for everyone! My wife thinks I'm nuts.

Dennis
links to photos below

75.0 mpg at 508.9 mi start of segment

75.9 mpg at 532.8 middle of segment (turn around point)

76.8 mpg at 556.7 end segment (returned to starting point)

[troe]

<div class='quotetop'>QUOTE(maineprius947 @ Sep 12 2006, 11:37 AM) [snapback]318408[/snapback]</div>

103 mpg for 47.8 miles round trip using pulse and glide

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Started at 508.9 miles 75 MPG on display, 6.785 gallons used since last fill, round trip segment to 556.7 miles 76.8 MPG , 7.248 gallons used since last fill. 47.8 miles for segment .463 gallons used, 103 mpg

trip od MPG--gal--miles--gal---MPG
--------disp--s/fill---------seg---seg
508.9 75.0 6.785
532.8 75.9 7.019 23.9 0.234 101.949
556.7 76.8 7.248 47.8 0.463 103.158

Pulse and glide does work, but it is not for everyone! My wife thinks I'm nuts.

Dennis
photos below

75.0 mpg at 508.9 mi start of segment

Good job, I just refilled and put in 9.8 gal in 633 miles for 64.6 MPG. I now have to keep the improvement to get to your numbers.




75.9 mpg at 532.8 middle of segment (turn around point)


76.8 mpg at 556.7 end segment (returned to starting point)

[/b]

[galaxee]

mpg on mfd= miles driven/volume gas injected into engine converted to gallons

pulse and glide doesn't fool anything.

[DaveinOlyWA]

nice tank maine

[dcoyne78]

Thanks Dave and pcflorida. Note that I did not get 103 mpg for a whole tank only for 47.8 miles, my best tank is 77, see my precious prius over at greenhybrid to see some really amazing tanks by Carl H this summer. His average since May is between 83 and 84 MPG, truely amazing.

Dennis

[curtissac]

<div class='quotetop'>QUOTE(Soylent @ Sep 12 2006, 08:21 AM) [snapback]318248[/snapback]</div>

After doing a bit of P&G, I felt that the amount of energy used to "pulse", or accelerate, was not equal to the amount saved while "gliding." I feel like it's artificially increasing the average MPG because it looks like the computer measures the average MPG based on the amount of time you're going that certain MPG.
So you burn gas to accelerate for 20 seconds, then you go 99.9 mpg for a few minutes. That fools the computer into thinking that you've been going 99.9 MPG most of the time, when in fact you burned a lot of fuel for that 20 seconds. This raises your MPG average, even though it may not be accurate in the end. Or am I not seeing this correctly?
[/b]

It isn't going to artificially inflate the MPG. Miles per gallon is miles per gallon. The average miles per gallon is over time - it doesn't matter if you P&Ging or had your foot on the floor. The computer will divide the number of miles you have covered by the amount of fuel used since you last reset it and that will be your average MPG. Doesn't matter if you burn x gallons in 3 minutes or 3 days.

The five minute interval bars are just there for the convenience of seeing recent history. Each five minute bar is caluclated by the same computer that is measuring the average.

The computer smarts in this car controls the operation of three motors to meet drivng needs at any given time, measures fuel delivery in grams and monitors the health of everything... you really think that P&Ging will confuse it?

[forman]

<div class='quotetop'>QUOTE(Soylent @ Sep 12 2006, 08:50 AM) [snapback]318348[/snapback]</div>

Cool, thanks everyone. I'm still not too good at P&G, so I find that cruise control gets me the best mileage.
[/b]

I wish more people would use there cruise control

[barbaram]

I have always been a big fan of cruise control... until now.

Have just started driving without out it... and while it is more work, I am seeing an improvement in mileage. Here , we have lots of very minor changes in grade which can have a big impact on mileage- with the foot, can glide longer and have actually been able to glide uphill!

For some driving, like the NJ turnpike in traffic- I think there is probably nothing better than cruise..... just go with the flow and have a blast!

[hdrygas]

I drove with cruse control for about the first year on my car. The main reason I did not do pulse and glide from the get-go was that I have 2 numb feet from back problems. I did not think that I had the necessary sensation to do pulse and glide. August of 05 4 people in Pittsburg inspired me to give it a try. They got 110 mpg on one tank! So I started working on pulse and glide and now it is becoming automatic. I have gone from the low to mid 50 mpg to 5 months above 60 mpg and one tank above 70! If I can do it anyone can. I will not be getting 60 mpg/ month soon as winter arrives but I will do better than last winter.

[DaveinOlyWA]

great improvement Henry!! but i think you still have to look at the break in being part of that improvement as well. i am breaking in a new Prius and my mileage has dropped about 8 mpg and im in the best of parallel tests you can do. same driver, same basic routes, same driving technique. went from averaging 60+ mpg in the summer to struggling to get 53. whats worse, just saw article in paper that most of the country is going to winter formula gas today (sept 15) there goes another 5-8% lower mileage...


just had my first fillup on my Prius Part Deux and now i know why there is 3 asterisks around the

***Full Tank of Gas***

i think it means "your fullness may vary"

computer mileage 53.3
pump mileage......44.4

oh well, next year when the LT difference is less than ½ mpg and my average is up 4 mpg, the pain will begin to fade