So, you are saying that ABS systems in general have independent
accelerometers at each wheel? (An accelerometer measures G-forces). As
well as having a computer which integrates the results instantaneously
and also tracks vehicle speed moment to moment?
I'm not disagreeing, but these features are what were in question in the
previous post.
This is more complex than the wheel-rotation-sensing concept that was
being discussed.
I would suspect different manufacturers have different solutions to this
problem, if only for patent-avoidance purposes.
I have an idea -- someone should look at a manufacturer's web site
(Volvo? GM? DaimlerChrysler?) to see if they have an explanation of their
particular system which we could discuss realistically, instead of
hypothetically. I know I have read descriptions of various systems in R&T
as they were introduced, but I don't know how I'd look them up.
REwald9535@aol.com had this to say:
>OK time for ABS 101 class
>
>In a message dated 01/21/2000 5:30:09 AM Pacific Standard Time,
>ckotting@iwaynet.net writes:
>
>Wrong, the answer is it can and does know the difference between a stopped
>car and one that is moving. How does it do this you ask. Simple the system
>calculates the G force (both positive and negative) for each wheel
>independently as well as an overall G force for the entire car. The system
>knows that it is impossible to go from 60 MPH to zero in oh say 0.01 seconds
>therefore the car is still moving. (yah I know about hitting a brick wall,
>but cut me some slack here) Also a good ABS system will not allow the brake
>to lock above a very low speed (2-3MPH) The scan tools that I use in my
>training center will display these G force figures, and can be knida fun to
>watch
>
>Rick Ewald
>
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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