HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Captain Hybrid

Steer-By-Wire to Reach Production Vehicles

NO RATINGS
< Previous Page 2 / 2
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 6/6
Battar
User Rank
Platinum
One more computer to go wrong
Battar   11/29/2012 9:16:10 AM
NO RATINGS
Today I drive a car with mechanical linkage and electric power boost (by chance, also a Nissan).  Nissan propose to give me the same, with an extra sensor and wire to the steering mechanism. The electrical signal will be the primary mechanism, but so what? It doesn't replace the existing linkage. Its extra - extra weight, extra power, extra complexity. What happened to "keep it simple" ? Keeping the mechanical linkage in place as a backup is Nissans' way of saying "we like the new system - but we don't fully trust it"

Cabe Atwell
User Rank
Blogger
Re: Mechanical Backup
Cabe Atwell   11/29/2012 2:17:07 AM
NO RATINGS
If airplanes mostly work that way, why not cars?

I think the only down side is the number of automobiles on the road. The chances of the system failing are far greater than with cars. You cannot guarantee that the car is professionally maintained. However, if this system is fool proof, I mean that with masses in mind, then it is the future.

Just a thought.

C

Charles Murray
User Rank
Blogger
Re: Mechanical Backup
Charles Murray   11/28/2012 6:07:18 PM
NO RATINGS
Right, Rob. For now, the clutch is there, but Nissan told us that if the mechanicals were ever removed, its engineers would incorporate a fail-safe sub-system. At this point however, it's not clear how the fail-safe sub-system would work.  

Rob Spiegel
User Rank
Blogger
Re: Mechanical Backup
Rob Spiegel   11/28/2012 4:26:50 PM
NO RATINGS
Interesting story, Chuck. It seems that the real gain will come when the redundant mechanical steering is eliminated. Yet that means that you wouldn't have steering if the electrical system failed.

Charles Murray
User Rank
Blogger
Re: Mechanical Backup
Charles Murray   11/28/2012 11:48:25 AM
NO RATINGS
You're not alone, Greg. I think most consumers will feel safer knowing the shaft is there, at least until steer-by-wire has a few years of success behind it.

naperlou
User Rank
Blogger
Re: Mechanical Backup
naperlou   11/28/2012 10:37:44 AM
NO RATINGS
Greg, the backup is absolutely required.  While it is rare, I have been in a car where the power failed and the power steering stopped working.  This was a hydralic system, and it was very hard to steer the car, but at least it could be done.  Electrical systems are more likely to go out on a car, I would venture to guess, than the purely mechanical ones.  Especially electrical systems that are digital. 

Greg M. Jung
User Rank
Platinum
Mechanical Backup
Greg M. Jung   11/28/2012 9:25:33 AM
NO RATINGS
I really like the mechanical shaft backup system for this design.  There is always a chance of an unintended failure and this backup shaft is a good way to mitigate this risk.

<<  <  Page 6/6
Partner Zone
More Blogs from Captain Hybrid
Electric vehicle batteries are progressing rapidly, but there’s still no sign on the horizon that the technology is going to revolutionize the auto industry anytime soon, experts said at The Battery Show in Detroit last week.
An engineering team from Ohio State University has set its sights on the unimaginable -- driving 400 mph in an electric vehicle.
We’ve collected photos of electric cars, designed for both the neighborhood blacktop and the commercial dragstrip. From the Crazyhorse Pinto and the Killacycle motorcycle to the Tesla Roadster and the 500-HP Renovo Coupe, we offer a peek at the blistering performance of the electric powertrain.
Tesla Motors might be planning to boost the driving range of its two-seat Roadster to 400 miles.
A Silicon Valley company has made the biggest splash yet in the high-performance end of the electric car market, announcing an EV that zips from 0 to 60 mph in 3.4 seconds and costs $529,000.
Design News Webinar Series
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.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.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
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.
Next Class: October 2
Sponsored by Altera
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