HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
<<  <  Page 8/8
Amclaussen
User Rank
Platinum
Now we are talking same language!
Amclaussen   3/4/2013 3:31:11 PM
NO RATINGS
I am confident that the loss of self-centering (restoring) force on the steering wheel that you previously referred as "torque-steer" is a result of front wheel drive non-optimal geometry when subjected to simultaneous turning and large torque application.  It is the same sensation referred in the Car and Driver article when describing the lack of return-to-center of the steering wheel in the powerful dodge SRT-4 that did not returned to center when accelerated. That the SRT-4 did NOT pull in the same direction of the turn means that in that respect, the overall steering design of the Dodge is better done than that V6 Honda, no doubt!

The sensation is VERY unpleasant, to say the least...  specially when the lock to lock ratio has many turns in it.  I clearly remember one of my first cars, a 2-door Valiant Duster (the mexican version of the Plymouth Duster) with the slant six 225 engine, manual steering with 24:1 ratio... in a slow turn, if I suddenly applied more than half accelerator without holding the steering wheel, the damn thing turned the steering into the turn until reaching the lock end!  It turned out that that was a new model platform, and that the factory did a mistake and set the front suspension on entirely wrong settings.  Once corrected camber/caster and toe (partially), that maddening tendency was subdued but not entirely fixed.  Best Regards.

 

Ivan Kirkpatrick
User Rank
Platinum
Re: Now we are talking same language!
Ivan Kirkpatrick   3/4/2013 3:42:41 PM
NO RATINGS
I remember the torque steer on the honda as being in effect in either direction of a turn.  Left or right the car would pull significantly in the direction of the turn.  I attributed this to the outside wheel receiving more if not all of the engine torque.  Perhaps front wheel differentials are different than the rear wheel ones I used to deal with.  the differentials I am familiar with only supply equal torque when the rotations of the output shafts are identical.  If one wheel is rotating slower than the other in a turn then the torue is essentially applied to the faster wheel only.

Your explanation would indicate the torque from the engine is applied equally at least as far as the differential output shaft and varous other factors produce the torque steer effect.  

I guess there are still some issues I don't quite follow regarding the front wheel differentials.  the papers you referred to would seem to indicarte that torque steer is a usually subtle affect based on steering geometry and torsional stiffness of the drive train on each wheel.  I thought it was a rather direct function of the differential.

<<  <  Page 8/8


Partner Zone
Latest Analysis
Industrial trade shows, like Design News' upcoming Pacific Design & Manufacturing, deserve proper planning in order to truly get the most out of them as marketing tools. Here's how to plan effectively.
Take a peek into the world of a test engineer – and then tell us about yourself! We want to know what part each of our readers plays in the wonderful umbrella known as design engineering.
On Sunday, when more than a hundred million Americans turn on their televisions to watch the Super Bowl, they might consider first giving thanks to a polymer known as polybutadiene. .
Design News is pleased to present the finalists in the Design Tools - Hardware & Software category of our 2016 Golden Mousetrap Awards.
The series now can interface with a wider array of EtherNet/IP-compliant hardware across many industrial sectors, including factory automation systems, plastic injection molding apparatus, and materials-handling equipment.
More:Blogs|News
Design News Webinar Series
1/28/2016 11:00 a.m. California / 2:00 p.m. New York
12/8/2015 11:00 a.m. California / 2:00 p.m. New York
2/18/2016 11:00 AM PT | 2:00 PM ET
2/24/2016 11:00 AM PT | 2:00 PM ET
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jan 11 - 15, Designing ARM Devices Using Segger Tools
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9


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 © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service