Voltage not reading correct afr

For discussion of Phil Tobin's Tuner Studio software (Only about the tuning software itself, not about how to tune or firmware features)

Moderator: LT401Vette

Voltage not reading correct afr

Postby maych87 » Mon May 01, 2017 7:50 pm

I am using my jimstim to test some outputs. I noticed that my wideband o2 voltage seems off. So I checked it. At 0v it should read 10 afr. It reads 10.1afr. Is that normal. If not how do I correct this. Attached is a picture of the calibrate afr table, afr gauge and exhaust gas oxygen voltage. As you can see it's set to 0v and is reading 10.1 afr.

Image


Sent from my iPhone using Tapatalk
maych87
MS/Extra Newbie
 
Posts: 28
Joined: Sun Feb 26, 2017 2:19 pm

Re: Voltage not reading correct afr

Postby racingmini_mtl » Mon May 01, 2017 8:31 pm

That's an artifact of the lag factor computation. If you set the Lambda lag factor to 100 (no smoothing), you will have the correct 10.0 at 0V. But you may then have a significant amount of noise on the AFR value.

Jean
jbperf.com Main site . . . . . . . . . . . . . . . . . . . . . . jbperf.com Forum
Image
racingmini_mtl
Super MS/Extra'er
 
Posts: 7806
Joined: Sun May 02, 2004 6:51 am
Location: Quebec, Canada

Re: Voltage not reading correct afr

Postby maych87 » Tue May 02, 2017 11:39 am

Does smoothing only affect the gauge reading? Or does it also affect how the reading is interpreted in the fuel tables?


Sent from my iPhone using Tapatalk
maych87
MS/Extra Newbie
 
Posts: 28
Joined: Sun Feb 26, 2017 2:19 pm

Re: Voltage not reading correct afr

Postby racingmini_mtl » Tue May 02, 2017 2:02 pm

It affects everything.
jbperf.com Main site . . . . . . . . . . . . . . . . . . . . . . jbperf.com Forum
Image
racingmini_mtl
Super MS/Extra'er
 
Posts: 7806
Joined: Sun May 02, 2004 6:51 am
Location: Quebec, Canada

Re: Voltage not reading correct afr

Postby maych87 » Tue May 02, 2017 3:43 pm

That does not give you a bad tune on the fuel tables? Is there a recommended lambda lag factor to set it to?


Sent from my iPhone using Tapatalk
maych87
MS/Extra Newbie
 
Posts: 28
Joined: Sun Feb 26, 2017 2:19 pm


Return to Tuner Studio

Who is online

Users browsing this forum: No registered users and 6 guests