Ford beats BMW to the variable ratio punch? - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > General BMW Questions

General BMW Questions
Use this forum to ask general question about the BMW ownership and keep up on the latest BMW news. Direct all model specific questions to model specific forums below.

Reply
 
Thread Tools Display Modes
  #1  
Old 11-18-2002, 05:19 AM
JST's Avatar
JST JST is offline
A sudden sense of liberty
Location: U of ///M
 
Join Date: Dec 2001
Posts: 3,939
Mein Auto: F80 M3, Model 3, 987S
Ford beats BMW to the variable ratio punch?

I just read a review of the 03 T-bird, which indicates that the Bird and the Lincoln LS both come with ZF Servotronic II variable assist/variable ratio steering racks. I remember reading an article in Roundel about variable ratio steering systems, but got the impression that it was still in the future for BMW products (and that it would be an innovation when it came out). Any insight?

Relevant T-bird passage below, from thecarconnection:

"The Thunderbirdís low-speed tuning shocks in the rear were slightly revised to better handle bumps, and its spring rates lowered to LS (read sport sedan) levels. The T-Birdís engineering manager also mentioned its reduced braking effort and more assist at low speed provided by ZFís Servotronic II variable ratio rack-and-pinion system with speed sensitive variable assist that replaced the previous Visteon system.

According to Shanahan, varying both the ratio and the assist provides the precise, linear steering feel that his team sought for both the T-Bird and LS."
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 11-18-2002, 09:24 AM
The HACK's Avatar
The HACK The HACK is offline
Rest in peace, Coach
Location: People's Republic of United States
 
Join Date: Dec 2001
Posts: 9,106
Mein Auto: '06 MZ4C, '09 WRX Wagon
The ZF Servotronic steering has been in employee by BMW in the 745i for almost 2 years now, read the sidebar on that article.

The new steering the article is talking about is a much more advance rack which varies ratio and boost pressure and is closely tied into the DSC and the yaw sensor.
__________________
Quote:
"Bench racing" about track times driven by professionals are like a bunch of nerds arguing which Princess Leia is hotter, the slave Leia or the no-bra jail-bait Leia. No matter how compelling your argument is, the plain and simple fact is, none of you will EVER get to hit that.
Reply With Quote
  #3  
Old 11-18-2002, 09:25 AM
nate's Avatar
nate nate is offline
I like cookies.
Location: Houston
 
Join Date: Dec 2001
Posts: 18,102
Mein Auto: 328Ci
Quote:
Originally posted by The HACK
The ZF Servotronic steering has been in employee by BMW in the 745i for almost 2 years now, read the sidebar on that article.

The new steering the article is talking about is a much more advance rack which varies ratio and boost pressure and is closely tied into the DSC and the yaw sensor.
Yes, this is not the "Active Steering" system. (Which has gotten good reviews, btw)
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 11-18-2002, 09:47 AM
Kaz's Avatar
Kaz Kaz is offline
King of Rear Clunks
Location: OC, CA
 
Join Date: Dec 2001
Posts: 12,903
Mein Auto: 01 325iT, 88 M6
I believe Servotronic (I) has been available on both E38s and E39s. I believe all currently existing 'variable ratio' systems have a varying but fixed ratio (i.e. non-linear) but the active sterring can dynamically change the ratio.
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > General BMW Questions
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 04:11 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.