Quattro Evolutions

quattro evolutions

Last changed: 2019/01/01 00:00 / History	Upload picture / View syntax

!quattro V Used on Audi Q7 (2005-), RS4 B7 manual (2005-), S4 B7 manual (2006-), A4 B8 all modifications (2007-), A5, A6 facelift (? 2006- verify) Type: [Full-time all wheel drive\|full]. [Torsen] type III planetary type center differential, 40/60 torque split front to rear, automatically locking with torque transfer variable from 70/30 to 15/85 front to rear. Open rear differential, [Electronic Differential Lock\|EDL]. Audi S4 (2008-) - [Torque-Vectoring\|torque-vectoring] "active [sport differential\|http://www.motorauthority.com/blog/1026492_audi-improves-quattro-awd-with-new-sport-differential]". *Open front differential, [Electronic Differential Lock\|EDL]. [./images/audi-quattro-5-torsen-type-3-differential.jpg\|caption=Torsen type III center differential on quattro evolution V] Watch how "active sport differential" works (from 2:40): {html}<object width="400" height="225"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=3063542&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=3063542&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="225"></embed></object>{/html} [./images/audi-sport-differential.jpg\|caption=Audi active sport differential] A torque split was changed on this vehicle to improve handling. Previous quattro generations were critisized for their unstable behaviour in slippery conditions, where the car's behaviour could suddenly change from understeer to oversteer. Transferring more torque to the rear axle in quattro generation V gives a rear wheel drive-like feel. In on-road conditions the car will not be able to move only when all four wheels lose traction. In off-road conditions (wheels in the air and an obstacle restricting the vehicle from moving forward) the car will not move further when one front and one rear wheels lose traction. The reason of this behavior is that [Electronic Differential Lock\|EDL] is not a replacement for mechanical differential lock and it is not able to transfer enough torque to another wheel. The car will end up spinning one front and one rear wheel with crackling EDL trying to stop them from spinning. {html}<iframe width="420" height="315" src="https://www.youtube.com/embed/UejUaDu23BI" frameborder="0" allowfullscreen></iframe>{/html} Pros: Good all-weather all wheel drive for on-road use, no driver intervention. Cons: When both front or both rear wheels are on ice, rollers, or raised in the air, the four wheel drive does not work. минута это сколько секунд Summary of changes

Last changed: 2019/01/01 00:00 / History	Upload picture / View syntax

quattro evolutions