Quote:
Originally Posted by travislambert
GM must feel that "peak slip %" is usually somewhere between 5% and 15%.
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Between 5% and 15% would not surprise me, as that's at least in the same ballpark as the tangent trig function of slip angles on the left side of the peak on a mu-slip plot before the peak itself is reached.
Why not an algorithm that simply ignores slip% below some road speed? Unless I'm mistaken, ABS systems have commonly used this approach to avoid ABS intervention when you really are almost stopped. The necessary sensing should already be in place (ABS, stability control, and hill-start), so it should be possible to determine and in most cases independently verify when to let the slip% become recognized as a valid input.
Yes, this should probably be somewhat mode-specific, as you'd probably want to avoid any wheelspin in 'snow/wet' but you clearly would want to allow it in 'track' and allow at least a little in 'normal' if that's what it takes to avoid the car perhaps unexpectedly falling on its face in traffic.
Norm