sensorless electric motor position detection

John Hess JohnH at ixc-comm.net
Tue Dec 17 15:51:46 GMT 1996



Actually, most detect wheel lockup by measuring the rotation of the 
wheels and perform antilock by releasing the brake (or pulsing it) on 
the wheel(s) that has/have stopped turning (assuming other wheels are 
still turning).

----------
From:  kleenair at ix.netcom.com[SMTP:kleenair at ix.netcom.com]
Sent:  Tuesday, December 17, 1996 10:20 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: sensorless electric motor position detection

Dave Zug wrote:
>
> anyway, can someone tell me how ABS detects wheel 
position/movement?
> (keep this one for the FAQ!)
>
> and, is ABS considered EFI related? (be nice)

Hi Dave,
Most ABS systems use a tooth wheel at the hub.  I'm pretty sure most
system detect a wheel slip condition by calculating the deceleration 
rate
of the wheel.

Although its not EFI, many of the same processes apply to ABS

Mazda




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