Prius Marathon Run

vincent1449p · 08-10-2005, 11:21 AM

Quote:

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

Not that there is a problem. I know how the calc are being derived. It is just that I can't see the relationship of the percent ICE on w.r.t FE. For eg., low percentage does not lead to high FE and vice versa. So the strategy is not to keep the percentage as low as possible?

Vincent

DaveinOlyWA · 08-10-2005, 11:35 AM

gee sounds to me that if the test was done during all daylight hours, you might have made 128 mpg as the headlights on lowers your mileage some.

makes for interesting speculation. hmmm 109 mpg in August...

112 mpg on June 22...longest day

100 mpg on December 22... shortest day

either way, its an awesome display of user controlled destiny. here we have a car that can get ultra mileage if we choose. other cars cant. even if radically altering your driving style on a normal car, you would not get such dramatic results.

my neighbor had a Jetta and she was under the impression that her mileage was just below mine. well when we checked it and started tracking it, mine was nearly double hers.

so she started driving like me (since she stated that the only reason why my mileage was so high was because i drove like a wimp) and her mileage increased 2 mpg. now i dont know how well she stuck to the driving technique. she claims she did it all the time.

time will tell i think since she is a college student and the recent spike in gas prices will hopefully make her conserve by driving sensibly all the time. however, i tried to tell her that her car had 2½ strikes against it for trying to get high mileage...

vincent1449p · 08-10-2005, 11:38 AM

Quote:

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

No problem, actually I was hoping that the team members can add their comments or any other additional info. first.

Feel free to modify the spreadsheet.

Vincent

ken1784 · 08-10-2005, 12:26 PM

OK, I understand about that.

Quote:

So the strategy is not to keep the percentage as low as possible?

I would like to let Dan to respond about that.

Ken@Japan

krousdb · 08-10-2005, 01:53 PM

Quote:

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

Not that there is a problem. I know how the calc are being derived. It is just that I can't see the relationship of the percent ICE on w.r.t FE. For eg., low percentage does not lead to high FE and vice versa. So the strategy is not to keep the percentage as low as possible?

Vincent

I would phrase it a different way. The strategy is to keep the ICE off when you don't need it. Our shift data shows a low of 20% and a high of 36% IIRC. The difference relates to the rate of acceleration and there doesnt appear to be a specific rate that yields the best results. The HSD system is truly optimized in this respect.

It would appear that as long as you keep your accel between 20-55MPG, and you don't let the ICE run while you are not accelerating, you will maximize your FE.

Dan

DaveinOlyWA · 08-10-2005, 02:05 PM

iow, slow acceleration or fast acceleration rates yield the same results?

krousdb · 08-10-2005, 02:17 PM

Quote:

iow, slow acceleration or fast acceleration rates yield the same results?

Not exactly... a 20 MPG instantaneous is not what I would call fast acceleration. I would say that slow or moderate acceleration yield results that are similar.

Slow acceleration uses fuel at a lower rate, but takes longer to get to speed, while moderate acceleration uses fuel at a higher rate, but takes less time to get to speed. It appears to be a wash.

We did not experiment with fast acceleration, mainly because it would drain the battery. I prefer to use the battery power for stealth while the ICE is off. Using battery power at 80-90% efficiency seems a better idea than using ICE at max 38% efficiency. Slow to moderate acceleration will recharge the battery sufficiently during a pulse. If Ive gotta use the ICE to pulse, I might as well charge the battery also.

Dan

tomdeimos · 08-10-2005, 03:03 PM

Anybody tried this pulse glide stuff on the highway over 42 mph?
I did today and it seemed to help.

DaveinOlyWA · 08-10-2005, 06:54 PM

ok thanks for the clarification. many here have said that rapid or above moderate acceleration to the cruising speed will save more gas in the long run or appears to them to be the best method for higher mileage.

just wondering what your take was on this. personally, i feel that the slower you accelerate, the better the mileage. i dont consider what method of acceleration is used.

so for your results, there is no differences you noticed for rates up to moderate acceleration. that is good to know. how fast is moderate?

Ray Moore · 08-10-2005, 08:04 PM

I believe he said it didn't matter as long as you don't use assistance from the electric motor. That means not too dang fast.

08-10-2005, 11:35 AM	#122
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 12,375 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 24 Thanked 121 Times in 103 Posts Friends: 10	gee sounds to me that if the test was done during all daylight hours, you might have made 128 mpg as the headlights on lowers your mileage some. makes for interesting speculation. hmmm 109 mpg in August... 112 mpg on June 22...longest day 100 mpg on December 22... shortest day either way, its an awesome display of user controlled destiny. here we have a car that can get ultra mileage if we choose. other cars cant. even if radically altering your driving style on a normal car, you would not get such dramatic results. my neighbor had a Jetta and she was under the impression that her mileage was just below mine. well when we checked it and started tracking it, mine was nearly double hers. so she started driving like me (since she stated that the only reason why my mileage was so high was because i drove like a wimp) and her mileage increased 2 mpg. now i dont know how well she stuck to the driving technique. she claims she did it all the time. time will tell i think since she is a college student and the recent spike in gas prices will hopefully make her conserve by driving sensibly all the time. however, i tried to tell her that her car had 2½ strikes against it for trying to get high mileage... __________________ My Blue 2010 : Last tank 541.9 @ 49.48 pump (56.7 MFD) 5.54 CPM, 21 MPH, Lifetime:5442.2 miles 56.5 MPG pump. (62.22 MFD) 4.72 CPM. Summer MPG 57.4 Winter: 49.5 My 2006 SPM: Last tank 376.6 miles @38.21 pump (40.8 MFD) 7.17 cpm winter mpg 49.64 summer mpg 53.41 lifetime: 42,563.5 miles 51.5 mpg pump (52.7 mpg MFD) 5.51 cpm My 2007 Zenn total "fuel cost" $166.58 on "about" 9599.7 miles. 1.74 cents per mile (granted i plug in for free at work!!) My Plate: DUALPWR (Dual Power)

08-10-2005, 03:03 PM	#128
tomdeimos Join Date: Feb 2004 Location: Lexington, MA Posts: 995 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Re: Prius Marathon Run Anybody tried this pulse glide stuff on the highway over 42 mph? I did today and it seemed to help.

LinkBacks (?) LinkBack to this Thread: http://priuschat.com/forums/gen-ii-prius-main-forum/10132-prius-marathon-run.html
Posted By	For	Type	Date
Toyota Owners Club - Toyota Forum > Keep It Clean!	This thread	Refback	05-21-2009 06:27 PM
Keep It Clean! - Toyota Owners Club - Toyota Forum	This thread	Refback	05-08-2009 03:02 AM
Keep It Clean! - Toyota Owners Club - Toyota Forum	This thread	Refback	05-07-2009 07:53 PM
Brtax Car Seats, Car Seats 20 To 35 Lbs, Britex Baby Car Seats - Enduromotorcycles	This thread	Refback	03-09-2009 08:27 AM
Prius links	This thread	Refback	06-14-2008 07:02 PM
Prius links	This thread	Refback	02-10-2008 03:14 PM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Will a Britax Marathon Car Seat fit?	cgilmer	Gen II Prius Main Forum	11	07-06-2009 03:55 PM
Honda Insight Marathon	efusco	Gen II Prius Fuel Economy	17	06-03-2008 03:46 PM
Marathon Mod Day: PriusXM, Fog Lights and EV	baxsie	Gen II Prius Modifications	6	12-18-2005 11:55 PM

08-10-2005, 02:05 PM	#126
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 12,375 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 24 Thanked 121 Times in 103 Posts Friends: 10	iow, slow acceleration or fast acceleration rates yield the same results?

08-10-2005, 06:54 PM	#129
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 12,375 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 24 Thanked 121 Times in 103 Posts Friends: 10	ok thanks for the clarification. many here have said that rapid or above moderate acceleration to the cruising speed will save more gas in the long run or appears to them to be the best method for higher mileage. just wondering what your take was on this. personally, i feel that the slower you accelerate, the better the mileage. i dont consider what method of acceleration is used. so for your results, there is no differences you noticed for rates up to moderate acceleration. that is good to know. how fast is moderate?

08-10-2005, 08:04 PM	#130
Ray Moore Senior Member Join Date: Mar 2004 Location: Texas Hill Country Posts: 820 My Car: 2004 Prius Model: Package: #9 Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	I believe he said it didn't matter as long as you don't use assistance from the electric motor. That means not too dang fast.