HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Page 1/4  >  >>
Ann R. Thryft
User Rank
Blogger
Re: Impressive savings
Ann R. Thryft   7/27/2012 12:58:20 PM
NO RATINGS
Jerry, it's well known that glass fiber composites don't give the strength-to-weight advantages of CF composites, in either commercial aerospace or high-volume automotive manufacturing. If they did the job, there wouldn't be much reason to investigate CF for these purposes. BTW, UPS is already using EV trucks:
http://pressroom.ups.com/Press+Releases/Archive/2011/Q3/UPS+Purchasing+100+All-Electric+Vehicles+for+California+Deployment

Jerry dycus
User Rank
Gold
Re: Impressive savings
Jerry dycus   7/26/2012 5:12:59 PM
NO RATINGS
 

  Even with the drivetrain, etc improvements 40% reduction is not believable. Now had they went battery dominated hybrid they might.

 

On your next article Ann ask them why they don't use medium tech composites instead of CF to save 80-95% in materials?

Ann R. Thryft
User Rank
Blogger
Re: Impressive savings
Ann R. Thryft   7/26/2012 2:01:49 PM
NO RATINGS
Sometimes people blame marketing departments as fudging numbers when the data don't seem to add up, but having worked in those departments for technical companies long ago, I tend to disagree with that assumption. Due to the reporting requirements of public companies like UPS, they generally don't make such claims unless they can back them up, since there are legal consequences. We don't have all the facts and for whatever reasons, UPS decided not to share them.

Ann R. Thryft
User Rank
Blogger
Re: Impressive savings
Ann R. Thryft   7/26/2012 1:59:57 PM
NO RATINGS
Thanks for doing the math Dave. It looks like only UPS (or Utilimaster) knows how they're boosting fuel efficiency by 40%. I suspect your hypothetical changes in the engine are key. The two things UPS mentions are weight reduction (of an empty vehicle) and powertrain improvements. Those are the same two factors I'm hearing while researching an upcoming feature on the use of carbon fiber-based components in cars. 

Rob Spiegel
User Rank
Blogger
Re: Impressive savings
Rob Spiegel   7/26/2012 1:30:16 PM
NO RATINGS
That link, Ann, spells out a lot more of the story. I think the commenters were savvy to catch the incongruity of the weight savings versus energy savings. But the links shows there is more to the story.

Dave Palmer
User Rank
Platinum
Re: Impressive savings
Dave Palmer   7/25/2012 1:30:08 PM
NO RATINGS
@Ann: Can you explain why a 10% reduction in empty weight results in more than a 10% reduction in gross (loaded) weight? I'm not sure I follow you.

It seems to me that it would be the opposite; 900 pounds is a smaller fraction of the gross weight than it is of the empty weight.  Assuming an 80% payload capacity, the gross weight should about be 9000 x 1.8 = 16,200 pounds.  900 pounds is about 6% of this.

On the other hand, the article mentions that there is also a 10% reduction in cargo capacity.  Obviously, this would reduce the loaded weight somewhat.  Again, assuming an 80% loading capacity, a 10% reduction in cargo capacity should mean a reduction of 0.1 x 0.8 x 9000 = 720 pounds, or about 4%.

900 pounds (6%) due to the reduction in the empty weight plus 720 pounds (4%) due to the reduction in cargo capacity adds up to 1620 pounds, or 10% of gross weight.

Still, if you take a 10% decrease in gross weight, along with a 30% reduction in horsepower (from 215 HP to 150 HP) and a 60% reduction in displacement (from 6.7L to 2.5L), plus some miscellaneous improvements in aerodynamics, a 40% reduction in fuel consumption is at least borderline believable.

JimT@Future-Product-Innovations
User Rank
Blogger
Re: Impressive savings
JimT@Future-Product-Innovations   7/25/2012 12:59:33 PM
NO RATINGS
I think you're saying the 40% fuel savings is a faulty claim, based on the data provided. I think you're right. Likely a number that was born in the Marketing department vs. the Engineering department.

Ann R. Thryft
User Rank
Blogger
Re: Impressive savings
Ann R. Thryft   7/25/2012 11:45:56 AM
NO RATINGS
The 900-lb weight savings is of the empty truck. As several commenters have rightly pointed out, a 10% savings in weight is nowhere near enough to produce a 40% fuel savings. Since fuel savings occur when the truck is out doing deliveries, i.e., loaded with packages, that's where added weight comes in to the formula, so the total loaded weight savings is obviously a lot more than 10%. There were some additional fuel savings because of powertrain improvements. The use of composites let Ultimaster re-design truck body components, and composite body panels are now easier to remove and repair/replace than components made of metal: http://pressroom.ups.com/pressroom/staticfiles/media/image/UPS_composite_vehicle.jpg

Rob Spiegel
User Rank
Blogger
Re: Impressive savings
Rob Spiegel   7/24/2012 2:53:49 PM
NO RATINGS
Yes, I agree, Jim. At some point things change when a new idea delivers efficiency. That efficiency gain will ultimately become a competitive factor. That will drive change.

JimT@Future-Product-Innovations
User Rank
Blogger
Re: Impressive savings
JimT@Future-Product-Innovations   7/23/2012 10:38:46 PM
NO RATINGS
That's the hardest thing about changing soooo many "set-in-stone" ideas and paradigms. One tired phrase I ALWAYS wince at, is: "That's the way its always been done". Kudus to both UPS and Utilimaster for getting out of that box.

Page 1/4  >  >>


Partner Zone
Latest Analysis
The phablet wars continue. Today we welcome the Nexus 6 -- a joint collaboration between Google and Motorola.
According to a study by the National Institute of Standards and Technology, one of the factors in the collapse of the original World Trade Center towers on Sept. 11, 2001, was the reduction in the yield strength of the steel reinforcement as a result of the high temperatures of the fire and the loss of thermal insulation.
If you have a Gadget Freak project, we have a reader who wants to make it. And not only will you get your 15 minutes of fame on our website and social media channels, you will also receive $500 and be automatically entered into the 2015 Gadget Freak of the Year contest.
Robots are getting more agile and automation systems are becoming more complex. Yet the most impressive development in robotics and automation is increased intelligence. Machines in automation are increasingly able to analyze huge amounts of data. They are often able to see, speak, even imitate patterns of human thinking. Researchers at European Automation call this deep learning.
Thanksgiving is a time for family. A time for togetherness. A time for… tech?
More:Blogs|News
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service