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  #1 (permalink)  
Old 12-11-2005, 04:44 AM
Always > 50 mpgUS+
 
Real Name: Phil
Location: Metrotown Burnaby B.C
Hybrids: 04 NHW20 Salvage Prius
Posts: 467
Default How do you pulse & glide?

Hey how does one pulse & glide properly to get high mpg? Is it true that P & G only works on priuses? So practing on a non hybrid car would be meaningless? Whats the speed range do you guys try to keep at? I've been trying to practice P&G on the simulator and been having trouble trying to get 100 mpg average. When P&G Ing what's the average mpg you would normally shoot for and what kind of road conditions would you attempt P&G on? Are civics left alone when it comes to this topic?

.

i got around 20 km a liter when i drove a civic 5 spd using advanced hypermiler techniques
and now I drive a salvage nwh20 prius that gets almost to 25 km/l with 195,000 km to date.
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  #2 (permalink)  
Old 12-11-2005, 08:12 AM
Clubford00's Avatar
Active Enthusiast
 
Real Name: Dean
Location: Buffalo Grove, Ill
Hybrids: 05 Toyota Prius, Super white
Posts: 147
Default Re: How do you pulse & glide?

I dont know about all cars but i can tell you that my prius loves to drive at 38-40 mph on a flat grade with the cruise control on. i can stay in ev mode almost indefinetly. Also it likes warm weather much better than cold. I would say above 50-60 degrees F is best 85 F is heaven.

.

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  #3 (permalink)  
Old 12-11-2005, 08:38 AM
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Posts: 839
Default Re: How do you pulse & glide?

I second the warm weather recommendation.
The simulator will just frustrate you until then

.


R2-E2
, 2G Prius.
Highway/City/Husband/Wife MPG: 56.5, as of 12/2005, 26K miles

Jac Nasser, Ford President: "We are planning to launch a hybrid version of
this car [P2000] within this year [1998]. We will also make FCEV available in
2004."
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Old 12-11-2005, 12:18 PM
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Real Name: Alan
Location: Appleton, WI
Hybrids: Prius - Hylander
Posts: 11
Default Re: How do you pulse & glide?

These guys seem to have a pretty good handle on it..

http://www.toyota.com/html/hybridsyn.../marathon.html

The Prius is an excellent vehicle for P&G but they really minimize the use of the battery. The glide with no energy transmitted in either direction is a significant contributor.

Good Luck.
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Old 12-11-2005, 12:36 PM
MPG FANATIC WITH GUZZLERS
 
Real Name: CHARLIE
Location: New Orleans
Hybrids: Prius 2006
Posts: 521
Default P&G in Titan

I do my own form of P&G in my Titan ever since I got a SCANGUAGE.I get up to speed-30 or so more quickly,and then just take my foot off the gas once I'm at speed.The Titan seems to glide forever-much farther than the Prizm or Pilot(not sure why).During pulse it might read 1-8 mpg and 3 gph;this is for maybe 5 seconds max speed 40mph..During the glide it will read 30-50mpg+ and this can be 10-30 seconds during which it reads .6gph.I rarely can drive more than 1/4 miles without a full stop of some sort.
If I use the egg under pedal method to accelerate It will read 5-11 mpg and 2+ gph for maybe 10 seconds.
I get up to legal speed quickly, then completely drop throttle.Gentle accelerating uses too much fuel and time-it allows too little time-distance-at .6gph(idle)Thanks.Charlie
PS I think P&G works because it uses fewer engine revolutions to travel the same distance.The energy lost to friction-and lost to heat-pressure going out the tailpipe -is closely related to the total number of engine revolutions.I think it is a bigger factor at lower speeds where aerodynamic drag is less important.If I could D/C the motor during the Glide I would use 0 gph,but I'm not up for that.I leave it in D while Gliding;too chicken to try to slip it into N(which is right next to R.)

Last edited by phoebeisis; 12-11-2005 at 12:44 PM.
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Old 12-11-2005, 01:53 PM
Always > 50 mpgUS+
 
Real Name: Phil
Location: Metrotown Burnaby B.C
Hybrids: 04 NHW20 Salvage Prius
Posts: 467
Default Re: How do you pulse & glide?

hahah scan gauge ya its a neat a little too i was about to buy one myself till I found out they wouldn't work in hybrid cars! hm the way i keep my speed is by not CC but with "feathering" the pedal so i'm hovering about 35 mph, then drop to 30 then 35 again but with very light feathering almost if I'm teasing the cylinders with tiny amounts of gas. Not sure if my method works well but if those who has a scanguage does I'd appreciate it!

.

i got around 20 km a liter when i drove a civic 5 spd using advanced hypermiler techniques
and now I drive a salvage nwh20 prius that gets almost to 25 km/l with 195,000 km to date.
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Old 12-11-2005, 06:36 PM
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Location: Atlanta
Posts: 57
Default Re: How do you pulse & glide?

You can pulse and glide quite easily in the new Honda Civic Hybrid. It works the same way by feathering the gas pedal, letting the ICE shutdown, and establishing the most assist possible. It will peg out at 100 MPG+.
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  #8 (permalink)  
Old 12-11-2005, 07:07 PM
Enthusiast
 
Real Name: David Lingner
Hybrids: Honda Civic Hybrid 2006
Posts: 37
Default Re: P&G in Titan

Quote:
Originally Posted by phoebeisis
too chicken to try to slip it into N(which is right next to R.)
The 06 HCH does pretty well in neutral when on downhill slopes. The tachometer stays near 2 while in D, but drops to 1 in neutral. Fewer rotations means lower fuel consumption. The drawback is that you don't recharge the battery as you would in D on the downslope. Without adequate recharging, uphill climbs aren't as efficient.

My HCH does great on flat roads, getting over 50 mpg in both city and highway. On hills, however, fuel economy drops considerably.

.

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  #9 (permalink)  
Old 12-11-2005, 07:10 PM
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Real Name: Wayne Gerdes
Location: Northern Illinois
Posts: 2,567
Default Re: How do you pulse & glide?

Hi Philmcneal:

___P&G works in every car/truck I have tried it in with an FCD so it is not exclusively a Prius II/HH/RXh/FEH mode of operation.

___As for what to shoot for, max the meters no matter what you are driving. The Prius II should be maxxed at 99.9 and your 5 minute bars should be pegged as well. In the HCH-I, you want to shoot for its particular max of 120.0 + but its going to be real tough to get there. The FEH, 60.0 + pegged …

___Clubford00, read up on the technique. If I were a Prius II driver, those nightmares we both get stuck in between Half Day and Touhy/O’Hare out on I-94/294 on a daily basis are absolutely made for it. Lake Cook or Willow road pre and post rush is a great place for it as well Holding 38 - 40 mph is the wrong thing to do.

___Afalnes, welcome to GH. We have some seriously great write ups on P&G as well as every other technique known to mortals here at GH. I hope you have the time to jump in with both feet and learn, learn, and learn some more

___9G-Man, you have to be careful how you say it is easy to do this or that … Pegging an instantaneous is as simple as letting off the pedal from speed in any automobile. Even holding a pure DWL on a steep backside can peg an instantaneous even while applying a minimal amount of power. Until more data is in our hands, forget about maximum assist. A pure P&G via FAS will yield higher results but with all the gyrations. Max assist on the Pulse is the exact wrong thing to do in a Prius II, FEH, and HCH-I. I would tend to believe it is the wrong thing to do in the HCH-II as well but we shall see.

___Good Luck

___Wayne R. Gerdes

.



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  #10 (permalink)  
Old 12-11-2005, 08:30 PM
MPG FANATIC WITH GUZZLERS
 
Real Name: CHARLIE
Location: New Orleans
Hybrids: Prius 2006
Posts: 521
Default Non Hybrid-hard accel-soft accel-might work out the same

philmcneal,I played around wht the scanguage in the Titan a bit,and the hard accel might not be better than the soft-teasing method.Frankly,it looks like a wash. If I spend 4 seconds getting to 30 I use about 5 gph-If I take 8 seconds,I use about 2.5 gph-.Since I'm pretty much running from light to light-the time the motor will have to run is fixed,and the same for both methods.
I did do some half assed glide testing-from 30 mph,I lose about 1 mph every 3 seconds.In the 30 seconds dropping to 20 mph(before the next pulse)I'll travel about 360 yards-the Pulse will be about another 30-40 years-so a cycle will be about 400 yards-just under a 1/4 mile.I'll have to see how well it glides at 60 mph.I wish I could shut the motor down during the glide-but no practical way to do that.The .6gph is providing me some push-I do about 8-10 mph at idle-.6gph.Thanks.Charlie
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