Re: ABS Stuff

[DeWitt Harrison <de@aztek-eng.com>]

On Mon, 17 May 1999 15:28:28 -0700, Scott Fisher wrote:
>[ ... snip discussion of static vs. sliding coefficients of friction ...]]
>I *will* say that understanding this and implementing it at 100%
>efficiency, lap after lap, are two entirely different things; the last
>time some dimbulb in a minivan poked out in front of me, I still slammed
>on the (non-ABS) brakes and locked up at least one wheel, forgetting
>everything I learned about threshold braking.  But the understanding of
>what's actually going on down at the road surface will certainly help
>make anyone a more engaged driver, which is what this is all about.

Scott,

That was a bit more background theory than I needed but I
certainly appreciate your clarifying the issue. I think I was
attempting to make things too complicated.

In generating high braking force, I suspect there is some sort of
rotational slip analogous to cornering slip angle where the
tire contact surface is advancing  just slightly more slowly than
the vehicle's velocity - a condition of quasi-static friction which
exceeds the sliding friction of a locked tire.

Thanks,

DeWitt Harrison
Boulder, CO
88 5kcstq