O2 Sensor

[Don.F.Broadus at ucm.com]

>From what I have read in the SAE proceedings on automotive
sensors/monitoring the crankshaft monitoring with magnetorestrictive sensors
( crankshaft acceleration) was the only reliable method of miss  detection
on a cylinder by cylinder basis. In normal engine operation cylinder miss is
quite common and random. The severity of miss is the big issue, as
incomplete combustion can be tagged as a 'miss' by a crankshaft acceleration
sensor and not be felt by the driver. CARB had sponsored research in miss
detection in there ever increasing quest to burden car buyers and
manufactures with unrealistic requirements and expensive technology.    









> -----Original Message-----
> From:	Geoff Richards [SMTP:geoffsue at one.net.au]
> Sent:	Friday, September 17, 1999 7:09 AM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: O2 Sensor
> 
> >  If the  O2 sensor was any good at finding individual cylinders
> (mixtures),
> >then why did gm go to crankshaft accleration rates for miss detection?.
> >Grumpy
> 
> got time to explain this or or the whereabouts I can get the info ?
> 
> Geoff