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Hybrid Vehicles Toyota Prius Toyota Prius MPG-Real World Numbers
769 messages, Last post on Dec 06, 2009 at 6:33 PM
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Replying to: xcel (Jul 14, 2005 2:02 pm) As an addendum, here are the definitions of some of the acronyms I used above. I may have got a bit ahead of myself  Delta’s: Elevation in feet of a hill or slope over and above the trough preceding it. Most overpasses have an ~ 25 – 30 ft. elevation Delta if that helps. Extreme Hypermiler: One who maintains at least 20% above the EPA highway over 5 + tanks going forward. In the Prius II, this is 61.2 mpg after 5 tanks or lmpg. Lmpg’s include both winter and summer temps and conditions so you can imagine how hard this pinnacle is to not only achieve but to maintain. FE: Fuel Economy. HW: Hardware. Hypermiler: One who averages and maintains at least the EPA combined over 5 + tanks going forward. In the Prius II, this is 55 mpg after 5 + tanks or lmpg. l/100 Km: Liters of gasoline consumed per 100 Kilometers. An example would be 100 mpg = 2.352 L/100 Kilometers. Lmpg: Lifetime Miles per Gallon MFD: Prius II specific “Multi Function Display” RT: Round Trip Segment: Any distance less then the distance you would travel over an entire tank. 75 - 125 miles are good segment distances to remove any warm up time from an overall fuel economy average. TC: Trip Computer Good Luck Wayne R. Gerdes
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Replying to: xcel (Jul 14, 2005 5:21 pm) Addendum #2. After a few more overseas and local E-Mails, there may have been some translation issues which might make “The Attempt” a possible easier hurdle. It appears the Japan Prius II record for FE over a tank is 85.84 mpg at 1,300 miles, not 102.7 mpg. The Japanese Prius II tanks are bladderless and can hold upwards of 15.9 gallons from my understanding? I will have to do some independent verification of that size tank in the Japanese versions as it seems a bit large vs. the US spec’ed tanks. We have a shot at 1,300 miles even with the US/Canadian spec’ed Prius’ 11.9 gallon tank if we can fill her up with an additional .75 or so gallons. We have an unproven technique for this and we will see if it works just before we begin the 38 + hour team drive. We will have to hit 102.x mpg or so over the tank to reach it but there is a good chance of this after seeing what Krousdb can and has done in regards to FE with his own Prius II on this particular route along the Ohio River near Pittsburgh, PA. In regards to a maximum FE segment, the Japanese Prius II FE record over a short segment is 107.7 mpg after a 40 Km drive at ~ 22 mph. Given our 105.2 mpg run over 4 - 22 mile segments (11 miles one way) at an average speed of ~ 36 mph, I am sure we nailed at least one of those segments at that level of FE performance although again, the US/Canadian spec’ed Prius II’s MFD is maxxed out so we did not have that level of resolution to see exactly what we achieved after any one RT segment. Good Luck Wayne R. Gerdes |
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Replying to: xcel (Jul 14, 2005 2:02 pm) I know you from driveaccord.net and i am curious about one thing. I am able to attain nice MPG with my honda accord.. 30 city 42 hwy. My question is this? Do you drive around , just to drive around or are the miles you put on your car miles that you NEEDED to drive to get to a particualr point in your life? The more I see your posts it seems like you are just driving around trying to get better and better MPG out of your car....and this concerns me, because the hybrids were made to save gas and it seems like you are driving around in a fog and wasting more gas than if you had bought an American SUV with 19MPG. My question is pretty blunt: Please answer it accordingly. I hope I am wrong in what I am accusing you of here, I have really respected your hypermiling tips before. Thanks, Phil K.
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Replying to: bigbucks1959 (Jul 20, 2005 10:56 am) As I posted over at DriveAccord, no. All my driving is to get back and forth to work, the store, the mall, or vacations etc. Except for the few miles of FE experimenting which is not anywhere near a whole tank. The record breakers are outlier’s of course but even those have some back and forth to work included as well. Good Luck Wayne R. Gerdes |
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Hi All: I think so http://hybridcars.about.com/od/news/a/100mpgattempt.htm Good Luck Wayne R. Gerdes
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Replying to: xcel (Jul 26, 2005 8:45 pm) Are there any modifications you do to the Prius itself-making the ECU even more MPG friendly etc?I try to max out my current vehicles(no hybrids yet,but soon)Prizm-Titan-Pilot-and my main "trick" is getting off the gas early and coasting down to a stop instead of using the brakes.I anticipate all stops waaay early if possible.The Titan gets an honst 21+mpg on the hy-decent for a 5000 lb truck with a V-8.It it were hybridized-put the electric motor "in" the 2 piece driveshaft,it could do much better in the city(12-17 current city).If it were diesel Hybrid,it might get an honest 22 mpg city-maybe 26 mpg hy. I have heard a lot of BS about why big rwd vehicles-full sized trucks especially-aren't suitable for Hybridizing.They seem like the perfect hybrids to me-small ish improvements are huge total fuel savings on them.Thanks.Charlie
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Replying to: phoebeisis (Jul 30, 2005 11:07 am) The point of hybridization is to get large improvements in MPG. That will not happen with large frontal areas and heavy weight. While it is true that on a percentage basis the MPG improvement is good, on an actual basis it is pretty low. The best one could hope for is 2 - 3 MPG on a large vehicle like a Titan (and that increase is mostly in-town, with very little increase on the highway). Contrast that to a Corolla at maybe 30 MPG in town vs. a similar sized Prius at 50 MPG in town - quite an improvement. The other type of hybrid is the GM pickup, which emphasizes having 120 volt power outlets for construction jobs, rather than any large increase in MPG. It would be far more economical to put in a diesel engine, at about the same cost, which would push up the MPG far more. I have heard of full sized GM pickups getting over 24 MPG on the road. |
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The following three articles are in Sunday's New York Times Automobiles section 12: http://www.nytimes.com/2005/07/31/automobiles/31AUTO.html? http://www.nytimes.com/2005/07/31/automobiles/31TOYOTA.html http://www.nytimes.com/2005/07/31/automobiles/31EPA.html You may have to register (it's free) to read them. The jist of the articles, that include much test driving, is that the fuel efficiency of the Lexus RX 440h and Toyota Highlander SUV hybrids was very dissappointing. There was barely any mileage difference between them and their much less expensive gasoline-powered relatives. |
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Replying to: phoebeisis (Jul 30, 2005 11:07 am) I hope the following Edmunds link works? xcel, "Hybrids in the News" #2490, 2 Aug 2005 12:59 pm Read the above post in the “Hybrids in the News” thread. The last link in particular will hopefully provide all the details you might be interested in? To answer you question directly, for this type of “Marathon - Attempt”, a technique called “Pulse and Glide” will be used almost exclusively with a small amount of DWL (Driving W/ Load), Rabbit and/or general Timing, and both regen and distance braking methods thrown in when they are appropriate. This is not for the average daily commute by any means but simply shows what is possible from a well setup hybrid. A non-hybrid of the Prius’ size, relatively comparable performance, and amenities will never be able to achieve this level of FE over that distance. Hopefully this helps move the discussion forward … Good Luck Wayne R. Gerdes |
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Hi. first, I have had my new Prius for 1 week. I have a 12 mile commute to work and because it is usually stop and go I get great gas mileage. Yesterday I averaged 79mpg. that was awesome. I heard the European Prius has an EV button that for short distances allows a person to use only electric power. That sounds great for grocery store hopping. Any ideas on retrofitting?
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