HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 3/3
warren@fourward.com
User Rank
Platinum
Re: New technology?
warren@fourward.com   7/16/2013 8:40:36 AM
NO RATINGS
I used to laugh at the thought of a car starting and stoping with each traffic stop.  I laughed until I was in a car that did that.  I thought it was fascinating!  It got me thinking of all the considerations for such a thing- airconditioning, lights, radio, and restarting, to name a few.  Someone has been thinking!  I am sold.  

I hope it was an engineer that came up with this and not a high school student...  Vanity rules!

Dr Bob
User Rank
Silver
stop start
Dr Bob   7/16/2013 8:37:37 AM
NO RATINGS
This is not new as it was fitted to one of my cars 25 years ago, a Fiat Regata ES, and termed as Citymatic.

 

returned 44mpg compared to 29mpg for the standard engine. Imperial gallons

RichR
User Rank
Iron
New technology?
RichR   7/16/2013 8:36:11 AM
NO RATINGS
Gas-powered golf carts have been using this technology for decades. Step on the gas pedal and the engine immediately starts to drive you to the next hole. Let up on it and the engine stops. I always wondered why this never propogated to cars.

Mydesign
User Rank
Platinum
New Technology -micro hybrid
Mydesign   7/16/2013 1:56:16 AM
NO RATINGS
1 saves
"It will be the move to the start-stop micro-hybrid -- a conventional gasoline-burning vehicle that uses an enhanced gear-based starter to enable its engine to shut down for short stops"

Charles, great. . We know in traffic, energy is wasting by keeping the vehicles in ON/Start position. I think by deploying this mechanism, fuel waste can be minimized and hence a better mileage

Charles Murray
User Rank
Blogger
Re: What's the downside?
Charles Murray   7/15/2013 6:26:17 PM
NO RATINGS
Another bunch of good questions here. In particular, I wonder about the software algorithms. My guess would be that the engine control algorithms can be tweaked to help deal with wear issues, especially by the automakers who are also building hybrids and already have the intellectual property. To be sure, we'll talk to the suppliers.

Charles Murray
User Rank
Blogger
Re: What's the downside?
Charles Murray   7/15/2013 6:21:30 PM
NO RATINGS
This is a good question. I don't believe there would be a problem with traffic stalls, Rob, since the engine is warmed up and the starters are designed for 250,000 to 500,000 starts. It's not as if the engine is being started cold every time, but this is a question that I need to discuss with some of the suppliers.

billkfromva
User Rank
Silver
Re: What's the downside?
billkfromva   7/15/2013 11:11:55 AM
NO RATINGS
That is a really good question that goes beyond stalled cars in traffic.  I have an Audi Q5 Hybrid - a well engineerd car, but I do worry about the long term efffects of the temperature excursions that must occur within a hot engine, as well as the additional wear that I would think is associated with increased engine rotations without the lubrications system running (i.e, engine lubrication is at its lowest during start cycles since the oil pump is only minimally operating).

The compute power deployed in hybrids seems to be capable of deciding when to implement start-stop, and when not to (which my Audi appears to do).  Are all cars using the start-stop technology going to employ the same sophisticated algorithms that the hybrids use?

I don't think that technology is the issue here, it is a matter of whether or not it is cost effective to employ that technology on an "inexpensive" start-stop system.  I really love my new hybrid, and have to trust that the engineers at Audi have thought everything through, but it has not withstood the ultimate test of time yet.

As I imagine we have all experienced - engineers don't always have the final say in the design that is ultimately produced.  Final designs are usually a compromise involving cost (understandably so).


Engineers need to keep asking the hard questions so that we end up with the best products possible for the dollar.

Rob Spiegel
User Rank
Blogger
What's the downside?
Rob Spiegel   7/15/2013 8:47:51 AM
NO RATINGS
Is there a downside to this technology, Chuck? Will there be a plethora of stalled-at-the-light vehicles once these cars are common on the street?

<<  <  Page 3/3


Partner Zone
Latest Analysis
This year, Design News is getting a head start on the Fourth of July celebration. In honor of our country and its legacy of engineering innovation -- in all of its forms -- we are taking you on an alphabetical tour through all 50 states to showcase interesting engineering breakthroughs and historically significant events.
Software developers beware: Your open-source components may not be secure.
For companies that have gone into corporate venturing, sponsoring and nurturing startup companies, the subsequent IP transfer is tricky.
Learn how to build Raspberry Pi controllers using Python during this free Continuing Education Center class presented by Design News and Digi-Key.
Earlier this year paralyzed IndyCar drive Sam Schmidt did the seemingly impossible -- opening the qualifying rounds at Indy by driving a modified Corvette C7 Stingray around the Indianapolis Motor Speedway.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 6 - 10, Building Raspberry Pi Controllers with Python
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


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.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service