Diferencial Torsen (Autoblocante) / Self-locking Torsen Differential

Diferencial tipo TorSen de puente trasero
Hecho en Autodesk Inventor 2009.

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[martinmohr]

For those who don't see how it locks: best not to think of it "locking" because it doesn't actually lock. As someone has said, it's "analogue" (so not digital=on/off). When you have a diff locker on, both wheels will turn at the same speed which gives traction to the non-slipping wheel but doesn't help the wheel that's lost traction. In this case both wheels will get some traction but the one with most grip will be favoured. The fact that it uses a worm gear is the reason for it working — friction. If you think of a guitar's machine head: you tune the string with a normal gear going to a worm gear. The tension on the string can't unwind the string because of the friction, even though it's easy to do on the tuning knob side. Sometimes if a wheel has absolutely no traction (in the air), the system might not work. But you can get it back working by adding some friction by applying the brake a little.

[NullaNulla]

Thank you, ontop of "engineering explained"'s whiteboard explaination this makes sense of the diff very quickly and shows the bit I was missing/misunderstanding.

[ElPatillaDeCadi]

Yes, you can use an open diff + ESP + ABS and you will have a "limited slip" differentiation...but Torsen device is fully mechanic and you ndon't have to use brakes, and it's reaction time is much lower than any electronic computer ;)

[marinkojezabek]

The only way to properly understand how this works is to watch the recommended animation and slow it down to a quarter of the speed. Watch it a few times and it will click in your head. For me, this is an engineering master piece utilizing a few simple gears.

[jubuttib]

It depends. Torsens seem very common these days in road cars, almost every new fangled AWD car and several RWD cars seem to have them in some form or another, but they're pretty absent from race tracks. In fact when cars that have torsens are converted for racing use (like an Lancer Evolution for example) they tend to replace the torsens with more traditional units. So yeah, it depends.

[ElPatillaDeCadi]

I think that Audi quattro System is good for off-road use man!! Good also for handling

[ChuddleBuggy]

Ok fellas, very cool discussion here. Here's how I understand the torsen. This diff allows differential action but only to a LIMITED AMOUNT, unlike a regular diff. The reason lies in the WORM GEAR setup: it is much much more difficult to drive the gear from the worm end. At low differential speeds (little difference side to side) the difficulty starts to come on, and as the speeds differ more, it becomes close to impossible to keep up, so the stopped shaft is then forced to rotate a little.

[bernymonty]

Torsen diferencial is used, when car goes in a turn ( let say left). In a turn left side of car will lose grip so the torsen dif. will cut the power from left wheel and send it to right wheel where all weight of a car and a grip is. The resoult is better handling and less understear trough corner. Alfa Romeo Q2 system have a torsen dif. And sorrry for my english :)

[tmtim]

@ElPatillaDeCadi Yes i think i understand now. The parallel-axis torsen differential is called Torsen T-2 i think. Anyway thanks for the advice, keep up the good work!

[makatron]

esta genial! por mucho el torsen es el mejor diferencial anti-slip que existe

[hellohooman]

We need more animations like these because explaining alone most of the time just doesn't do it.

[safetyfirstintexas]

excellente animaticion, mucho gusto! con tex-mex.

[Phoenix_]

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[schwalbstar]

in addition the torsen diff. can be seen as self-locking caused by the friction, so it does not need the help of ESP/additional braking to equate low speed differences! - the newest differential type by audi in this case is the "Kronenrad-Differential" -> increased "self-locking" center diff. -> opinion is, not to need any electronics helping to equate speed differences -> reaction without any time lag

[schwalbstar]

yes in fact it IS a type of open diff. (the whole opinion of the torsen-diff. is to reduce the mechanical ability to equate speed dfferences! -> use of planet gears with helical gearing -> increased friction!)

like every "torque-feeling" differential it does NOT work, when 1 wheel left the street -> u need systems like ESP in addition to brake the wheel, torsen diff. is used by Audi Quattro to lock between the axles, but can be used of course between 2 wheels also.

[ScarlattaOhara]

Un video realmente bueno, enhorabuena ¡¡

[josemariv]

Gracias por el video, me has resuelto varias dudas :D

[TOBAYSON]

Este diferencial se usa en un 4x4? si una llanta quedara en el aire (por ejemplo al subir una duna o un cerro) el diferencial le mada toda la potencia a esta ¿o sigue suministrando la misma potencia a las dos llantas por igual?

[TOBAYSON]

Ok gracias por responder, pero mandan la fuerza igual a las dos llantas osea 50 y 50? me faltó agregar eso.

[hp]

Great video explanation !
Muchas Gracias !!