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0 pointssupermatt3y ago0 comments

Traction control on an AWD system can be composed of power management (overall torque output), power distribution (how much power goes to each axle/wheel) and braking (slowing down individual wheels).

Traction control on a 4WD can only consist of power management and braking, because there is no way to vary the distribution (otherwise it would be AWD, not 4WD).

There are some systems that under certain conditions will switch from 2WD to 4WD. Those systems are NOT considered AWD and dont have the benefits thereof.

FYI, ESP (Electronic Stability Program) is just a brand term for an ESC (Electronic Stability Control) which covers both TCS and ABS. When people talk about "traction control" they usually mean the entire ESC subsystem.

0 comments

alkonaut3y ago

I think part of why I consider them to be one and the same is because in the total absence of "true" 4WD/4x4 (approximately no one drives pickup trucks in Europe, I'm guessing that's where the true 4x4 still lives in the US) so the 4WD/2WD moniker has been used for 2WD/AWD as in "Will you get the 2WD or 4WD tesla is used somewhat sloppily?". It seems car manufacturers though are still careful not to call anything 4WD or 4x4 when it's not.

supermattOP3y ago

Lots of "true" 4WD vehicles in europe. Also, lots of AWD vehicles with lockable centre differentials (which effectively makes them 4WD when needed).

But thats not your typical SUV, no.

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