02 sensor - temprature compensation.

[Wen Yen Chan]

Hello,

Just a thought... Why not use a cheaper 1 wire o2 sensor and monitor its
temperature by measuring the sensor's impedence.  

Wen

On Fri, 19 Mar 1999, Bruce Plecan wrote:

> 
> -----Original Message-----
> From: Espen Hilde <mwichstr at online.no>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Friday, March 19, 1999 5:06 PM
> Subject: 02 sensor - temprature compensation.
> 
> Need to have a second sensor, independent of O2 for sensing temp.
> Now if you used a heated O2 sensor and used the resistance of the heater as
> an indication of the EG temperature, then your cooking.  Now that gm has 4
> wire O2s that is something to look at......   830mv, can be 12.5 to 11.3:1
> depending on EGT.
> Bruce
> 
> 
> >Seems like its difficult to accept that a regular o2 sensor is not accurate
> >in
> >rich or lean and high temp conditions.
> > Making  wide band sensor circuit have stranded 2 times......maybe its to
> >time consuming or to difficult?
> >The wide band sensor is expensive......
> >What about developing a temp compensating circuit for the LM 3914  based
> >led meter?
> >Is this easy?
> >Maybe a led temp meter with it?
> >Espen Hilde
> >
> 
>