The electronics magazine Circuit Cellar had a article on ABS a few months ago.
Check out http://www.circellar.com/
I cannot connect to their site right now, but if you try later you can locate
the correct issue from the 1997 index.  Walter Banks is very knowledgeable in
these control systems areas.  Can you give us a simplified explanation, Walter?

---- Steve



On Fri, 23 Jan 1998, Oyvind Kaurstad wrote:

> This system have sensors on the wheels that senses whether
> it is rotating or not. Usually it is sensing on a toothed disk of
> some kind. (Probably some kind of hall-effect gadget)
>
> This is perfectly suited to sense if there is rotation or not.
>
> But here comes the interesting part:
>
> How can a car with ABS brakes come to a stop in a hill?
>
> Why don't the ABS-system release the brakes when the car stops?
>
> And now you might say that the ABS-system is deactivated below
> a certain speed, which is absolutely correct.
>
> But what if a car standing still starts to slide? Will the ABS-system
> be able to release the brakes?
>
> Just wondering....
>
>
> -Oyvind
>