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09-07-2007, 09:11 AM
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Engineering first
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Real Name: Bob
Location: Huntsville, AL
Hybrids: Prius Classic 03
Posts: 4,730
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Cummin's MPG paper
Hi,
While looking for something else, I came across this interesting paper:
http://www.everytime.cummins.com/eve...Whitepaper.pdf
Long haul truckers have a similar interest in fuel efficiency and though there are some differences, many of their techniques apply to what we try to accomplish. For example, cresting a hill at the minimum possible speed and letting gravity handle the subsequent acceleration.
Bob Wilson
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09-11-2007, 02:11 PM
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Old Boomer Techie
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Real Name: BobB
Location: Pacific Northwest (WA)
Hybrids: '07 TCH (Titanium)
Posts: 503
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Re: Cummin's MPG paper
Yep, a lot in common. Low Rolling Resistance tires, tire inflation, streamlining (keep that hybrid clean), fuel and lubricaton choices, lubrication levels, systems management (A/C instead of air in our case), long range anticipation of stops, grades and speed changes, constant RPM operation in cruise, use of small grades.
Gosh, I now know how to talk to a trucker -- can't wait for the next "choke and puke" stop in the Interstate.
It is the ignorant among us that will eventually destroy us all.
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09-14-2007, 10:50 AM
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Active Enthusiast
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Real Name: Mike
Location: Oak Park, IL
Hybrids: Toyota Camry Hybrid
Posts: 99
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Re: Cummin's MPG paper
Dont forget the go go juice.
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09-19-2007, 09:10 AM
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Active Enthusiast
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Hybrids: Toyota Prius
Posts: 83
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Re: Cummin's MPG paper
Thanks for posting, that was an interesting read.
I was most surprised by the results of blacktop versus concrete. Obviously polished concrete is the way to go, but I would've thought fresh blacktop would be fairly smooth. Guess not 
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10-24-2007, 10:58 PM
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Enthusiast
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Real Name: Kerpal
Hybrids: Civic
Posts: 38
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Re: Cummin's MPG paper
Quote:
Originally Posted by Qslugs
Dont forget the go go juice.
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Wat gogo juice?
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10-25-2007, 09:06 AM
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Ridiculously Active Enthusiast
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Real Name: Harold Wilkie
Location: Grand Forks B.C.
Hybrids: HCH 11
Posts: 767
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Re: Cummin's MPG paper
Haven't you noticed the trucks wheels sinking into that nice smooth black-top on a hot day! H
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01-09-2008, 07:44 AM
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Active Enthusiast
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Real Name: Fadi
Hybrids: '04 HCH
Posts: 75
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Re: Cummin's MPG paper
interesting read. I guess when you only get 6mpg, every little change helps.
-Fadi
1991 Mazda Miata to beat Corvettes at the track
1999 Dodge Ram to climb through rocks and brush
2004 Honda Civic Hybrid to make up for the other 2
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01-09-2008, 10:16 AM
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Hybrid Technologist
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Real Name: John
Location: N.Colorado & S.Minnesota
Hybrids: 2005 Diet Ford Escape FWD, 2000 Honda Insight
Posts: 2,486
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Re: Cummin's MPG paper
I think that is a great article.
I think if you look at everything as a % most tips will apply.
I liked the part of for each 10'F lower temperature, wind resistance increases by 2%. Me at 0'F is 14% more wind resistance than someone in say, Jupiter Florida with 70'F. That's not counting the fact that the oil is colder, engine is colder, batteries are colder, winter fuel.... etc....
 I also liked the fact the bald tires get better MPG than new ones!
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01-10-2008, 06:23 AM
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Energy Independence!
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Real Name: Fernando
Location: South Texas
Hybrids: Honda Civic
Posts: 295
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Re: Cummin's MPG paper
I wonder what kind of mileage, the crooks in those police chase videos get. Doing 85+ miles per hour with four flat tires after running thru spikes, and the muffler scrapping against the pavement.... 
The U.S. has reached a point “where the priorities of Congress could become so distorted by politics” that it would turn its back on the next great global industry, clean power — Rhone Resch
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02-10-2008, 08:50 AM
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Active Enthusiast
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Hybrids: Honda Civic Gen 2
Posts: 90
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Re: Cummin's MPG paper
Quote:
Originally Posted by tekn0wledg
Thanks for posting, that was an interesting read.
I was most surprised by the results of blacktop versus concrete. Obviously polished concrete is the way to go, but I would've thought fresh blacktop would be fairly smooth. Guess not 
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I noticed lower MPG on blacktop too. I always thought that rather weird as it seems concrete has better traction for stopping and better mpg. I'm not a fan of blacktop at all. Its only advantage seems to be its better in the rain.
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