If we have Torsen controlling front/rear splits and EDL controlling side/side splits... what happens
01-28-2002, 09:14 AM
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If we have Torsen controlling front/rear splits and EDL controlling side/side splits... what happens
when half the car hydroplanes? I.E. I go flying through a puddle down the passenger side, but not the driver side?
It's pretty cut and dry if I go through with the entire front/rear in it...
But if the water puddle is long enough to hydroplane both the left wheels.... is EDL going to kick in and apply the brakes on both those wheels to transfer power to the right wheels?
Doesn't that sound like a really stupid thing to do in that situation?
It's pretty cut and dry if I go through with the entire front/rear in it...
But if the water puddle is long enough to hydroplane both the left wheels.... is EDL going to kick in and apply the brakes on both those wheels to transfer power to the right wheels?
Doesn't that sound like a really stupid thing to do in that situation?
01-28-2002, 09:49 AM
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Yes. I know. But I thought that's how EDL worked. It applies brakes to transfer power.
It's not a haldex based differential (clutch INSIDE the diff)... is it?
In either case, it's still the same principle... it's still preventing the wheel you're hydroplaning on from rolling along....to keep power to the other wheels...
Maybe it's me... but I'm still thinking that's a damn good way to unsettle the car in a situation like that.
EDL = apply brake to transfer power
ESP = apply brake to induce/reduce rotation
In either case, it's still the same principle... it's still preventing the wheel you're hydroplaning on from rolling along....to keep power to the other wheels...
Maybe it's me... but I'm still thinking that's a damn good way to unsettle the car in a situation like that.
EDL = apply brake to transfer power
ESP = apply brake to induce/reduce rotation
01-28-2002, 09:53 AM
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Only if there is slip
The EDL will only apply brakes to correct the tire slip. If you were accelerating hard (yes I know, s4s are always accelerating hard) through the puddle the planing tire would start to spin the EDL would apply brakes to the spinning wheel until the spinning stops. The goal of EDL is to stop the spinning of the tire (reletive to the other tires) and not to stop the wheel completely
01-28-2002, 10:53 AM
#5
Correct, not having a locking mechanism like older Audis, nor a viscous diff. it has to use the
brakes to 'transfer' power to the other side.
At highway speeds I doubt it would come into play, ESP would step in before is my guess.
EDL works ok, but in certain situations the CPU seems to get confused and doesn't appply the brales correctly.
Seen it when you are stuck on a small hill and sideways, my guess is that if it was straight up it would have less problem.
At highway speeds I doubt it would come into play, ESP would step in before is my guess.
EDL works ok, but in certain situations the CPU seems to get confused and doesn't appply the brales correctly.
Seen it when you are stuck on a small hill and sideways, my guess is that if it was straight up it would have less problem.
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