Quattro torque distribution - Audi Q3 Forum
User Tag List

 
Thread Tools
post #1 of 10 Old 09-24-2015, 02:54 AM Thread Starter
Member
 
Join Date: Sep 2015
Posts: 67
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Quattro torque distribution

Hi,

First posting here. I will be a Q3 owner very soon, in fact just a few more days. In the mean time I have some questions regarding how the Q3 quattro system works. I hope someone can chimp in

- From what I understand (from the Audi websites and wiki...etc), the Q3 has its majority of torque at the front axle under normal driving conditions. But I can't seem to find exactly the percentage though, like 80%/20%, 90/10, or 95/5...etc. Since the MPG is so close between the FWD and Quattro, I would guess it's at least 90% on the front axle. Anyone has more concrete numbers?

- And how about torque distribution between the left and right wheels? Some said only the front axle can freely distribute torque among the front wheels, but not the rear axle... I find that a bit strange... is that true?

Thanks in advance!
Edward
Edward is offline  
post #2 of 10 Old 09-24-2015, 11:06 AM
Senior Member
 
Join Date: Sep 2015
Posts: 239
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Garage
Quote:
Originally Posted by Edward View Post
Hi,

First posting here. I will be a Q3 owner very soon, in fact just a few more days. In the mean time I have some questions regarding how the Q3 quattro system works. I hope someone can chimp in

- From what I understand (from the Audi websites and wiki...etc), the Q3 has its majority of torque at the front axle under normal driving conditions. But I can't seem to find exactly the percentage though, like 80%/20%, 90/10, or 95/5...etc. Since the MPG is so close between the FWD and Quattro, I would guess it's at least 90% on the front axle. Anyone has more concrete numbers?

- And how about torque distribution between the left and right wheels? Some said only the front axle can freely distribute torque among the front wheels, but not the rear axle... I find that a bit strange... is that true?

Thanks in advance!
Edward
It uses a at least the 3rd gen Haldex sytem - prevalent on FWD/Traverse (sideways) engine mounted cars - & activated most of the time @ 95/5 Front wheel bias.
If the front wheels slip, the percentage going to the rear is increased upwards to 100% or any other % to the other non slipping driving wheels.


See #11 here

Listed under Vehicles equipped with Haldex AWD

Current Stable:
2015.VW GTI.4S in Midnight Blue+LP+MM
2016.Audi Q3 Prestige Quattro in Mythos Black+Chestnut+Aluminum+Sport Pack
Q3User is offline  
post #3 of 10 Old 09-24-2015, 08:09 PM
Senior Member
 
john's Avatar
 
Join Date: Aug 2015
Location: Go Bucks!
Posts: 379
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 105 Post(s)
Ahh good to know. So we basically have a front driver and all wheel driver only when needed!

2016 Audi Q3 Prestige Cortina White - Hers
2016 Audi Q3 Prestige Glacier White - His
2017 Chrysler Pacifica Limited Tusk White - Mine
john is offline  
 
post #4 of 10 Old 09-24-2015, 09:11 PM
Super Moderator
 
rnlabas's Avatar
 
Join Date: Jul 2014
Location: Greenville, SC - USA
Posts: 2,401
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 612 Post(s)
Garage
Other than trucks and off-road vehicles, THIS is a pretty normal setup for cars - and a quite desirable one. If you had say 60:40 all the time, first it would NOT be needed, and second would consume way too much fuel for sensibilities. Haldex cars are great in that they do exactly what you need just exactly when you need them to. There is nothing wrong with knowing that.

For strictly performance cars, like the RS cars or the R8, a rear-drive bias is also optimal, and having some front drive capability just improves that when pulling out of corners ... perhaps not as exciting looking as drifting, but when you look at the numbers, sideways is ALWAYS slower on asphalt than rolling at the edge. Just think about it - tires are designed to roll, not slide. MAXIMUM grip is attained when rolling, sliding has none - and this goes almost 3x for braking ...


- Roger
_______________________________________


2014 R8 V10+ 6MT, Daytona Gray Pearl/Black w/Diamond Stitching
2015 Q3 2.0 Quattro Prestige S-line, Tundra/Chestnut
2016 TTS, Nano/Express Red
rnlabas is offline  
post #5 of 10 Old 09-25-2015, 01:42 AM Thread Starter
Member
 
Join Date: Sep 2015
Posts: 67
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Thanks for the information. One more thing that I would like the understand more:

How about torque between the left and right wheels? According to those pages, seems like the front axle has an open diff with EDL (Electronic Differential Lock), but I am not sure about the rear axle. Let's say if both front wheels and 1 of the rear wheels lose traction, will the system able to send more torque to the remaining wheel (on the rear axle) that has more traction?

Thanks!
Edward is offline  
post #6 of 10 Old 09-25-2015, 05:06 PM
Super Moderator
 
rnlabas's Avatar
 
Join Date: Jul 2014
Location: Greenville, SC - USA
Posts: 2,401
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 612 Post(s)
Garage
In these cars (w/Haldex) the rear diffs are a limited slip type, usually affording about 75% lockup to the other side, when needed. The Sports-Diff is a bit more complex, but also a clutch-type that will be a bit more aggressive - say 90% side-to-side...


- Roger
_______________________________________


2014 R8 V10+ 6MT, Daytona Gray Pearl/Black w/Diamond Stitching
2015 Q3 2.0 Quattro Prestige S-line, Tundra/Chestnut
2016 TTS, Nano/Express Red
rnlabas is offline  
post #7 of 10 Old 09-25-2015, 06:29 PM Thread Starter
Member
 
Join Date: Sep 2015
Posts: 67
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Thanks a lot Roger! It's nice to understand how the system works.
Edward is offline  
post #8 of 10 Old 09-25-2015, 08:12 PM
Senior Member
 
john's Avatar
 
Join Date: Aug 2015
Location: Go Bucks!
Posts: 379
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 105 Post(s)
So my Q3 is a front driver - why don't I detect any torque steer?

2016 Audi Q3 Prestige Cortina White - Hers
2016 Audi Q3 Prestige Glacier White - His
2017 Chrysler Pacifica Limited Tusk White - Mine
john is offline  
post #9 of 10 Old 09-25-2015, 11:38 PM
Super Moderator
 
rnlabas's Avatar
 
Join Date: Jul 2014
Location: Greenville, SC - USA
Posts: 2,401
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 612 Post(s)
Garage
Quote:
Originally Posted by john View Post
So my Q3 is a front driver - why don't I detect any torque steer?
Mostly cuz Audi has designed the front suspension pretty well to mostly eliminate it. That coupled with a comparatively mild throttle tip-in for a car with substantial heft in the front, keeps it in check also (as well as nice tight control arm bushings, dampened intermediate shaft, etc.)

btw, with my SprintBooster turned up (red) and in Sport, yup - there's definitely a dose when you tromp on it ...


- Roger
_______________________________________


2014 R8 V10+ 6MT, Daytona Gray Pearl/Black w/Diamond Stitching
2015 Q3 2.0 Quattro Prestige S-line, Tundra/Chestnut
2016 TTS, Nano/Express Red
rnlabas is offline  
post #10 of 10 Old 09-26-2015, 12:15 PM
Senior Member
 
john's Avatar
 
Join Date: Aug 2015
Location: Go Bucks!
Posts: 379
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 105 Post(s)
Thanks Roger. I always appreciate your explanations!!

2016 Audi Q3 Prestige Cortina White - Hers
2016 Audi Q3 Prestige Glacier White - His
2017 Chrysler Pacifica Limited Tusk White - Mine
john is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Audi Q3 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



  Similar Threads
Thread Thread Starter Forum Replies Last Post
Audi A3 Quattro 1.8T TURBO Rinmike The Car Lounge 1 07-31-2015 01:08 PM
Month in with my Q3 2.0 TFSI quattro Technik tiptronic Vbesa Introductions 16 07-06-2015 01:27 PM
Test Drive: 2015 Audi Q3 Quattro Technik Quatto Audi Q3 Reviews 0 05-13-2015 12:41 PM
Electrified e-Quattro AWD Miyata The Car Lounge 2 01-29-2015 07:05 AM
Ur-Quattro will Inspire the 2017 Audi Q3 Design Otto Audi Q3 General Discussion 2 07-04-2014 04:31 PM

Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are Off