ABS

[Jens Stobernack]

On Wed, 29 Jan 1997, Mike Turner wrote:

> 
> I was one of the people affected by the server glitch and never received any 
> replies (maybe there were none.....), so I'm going to ask again....
> >>>I know this is an EFI group but ...... What type of sensor does Bosch ABS 
> use for rotation? Hall effect? Proximity? Something else? Does anyone know 
> what the minimum speed for ABS to be engaged is? Has anyone hacked
> one of these?<<<
> 

	I can only speak from VW experience. There is a toothed wheel 
on the brake hub of each wheel. It spins with the wheel. An inductive 
pickup sensor seats mm from the wheel, connected to a static part of 
the car. I think the ABS is always on. Even at slow speeds on ice you 
can engage it.

Hope this helps,
Jens