# RE: how does an open differential work

• To: "quattro@coimbra.ans.net" <quattro@coimbra.ans.net>
• Subject: RE: how does an open differential work
• From: Dave Eaton <dave.eaton@minedu.govt.nz>
• Date: Thu, 26 Feb 1998 23:01:47 +0012
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```hey, you're on.

btw, power = torque * rotational speed.

if rotational speed is 0, then so is power.  power is what is required...

as for the modern quattro's, then they all have torsen.  they also have edl,
which is also as you suggest, basically an abs backwards...

dave
'95 rs2
'90 ur-q

>------------------------------
>
>Date: Wed, 25 Feb 1998 18:08:24 -0800
>From: "Buchholz, Steven" <Steven.Buchholz@kla-tencor.com>
>
>Hey Dave, I'll take you up on the \$1000 ... ;-)
>
>... just because the other wheel is not spinning does not mean that
>there is no torque applied to it ... the amount of torque that is being
>used to accelerate the spinning wheel simply isn't sufficient to cause
>the other to turn.  Now, let's start adding a bit of resistance on that
>freely spinning wheel ... let's say by applying the brake just slightly
>(not enough to actually cause it to stop spinning).  Eventually you will
>get to the point where enough torque is supplied to the "stationary"
>wheel to get it to start turning.
>
>Do you know why very few if any quattros have torsens any more?  They
>now use "EDL" which really is the same thing I described above ... use
>the brakes on slipping wheels to allow more torque to the wheels that
>have the grip ...
>
>Steve Buchholz
>San Jose, CA (USA)
>
>> ----------

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