HarleyTechTalk

Dyno & Tuning Zone => AFR & Tuning Zone => Topic started by: Harley Pilot on December 28, 2018, 05:20:14 AM

Title: Closed Loop Lambda Range
Post by: Harley Pilot on December 28, 2018, 05:20:14 AM
Does this need to be addressed when running a Target Tune map? Mine is currently set for the narrow band O2  range.
Title: Re: Closed Loop Lambda Range
Post by: rigidthumper on December 28, 2018, 06:02:57 AM
Target tune is supposed to be closed loop anywhere you set the AFR desired table. Did you get a TT map from Dynojet?
Title: Re: Closed Loop Lambda Range
Post by: Harley Pilot on December 28, 2018, 06:04:31 AM
Quote from: rigidthumper on December 28, 2018, 06:02:57 AM
Target tune is supposed to be closed loop anywhere you set the AFR desired table. Did you get a TT map from Dynojet?

YES Sir I did.
Title: Re: Closed Loop Lambda Range
Post by: rigidthumper on December 28, 2018, 06:26:07 AM
TT maps are capable of using whatever value you set in the AFR table as closed loop- if you want 13.8 at idle, and 14 at cruise, and 12.5 load/power, simply set it there, & it should be able to adjust to that. There are limits that the system has, & if the VE table has spots that are beyond those limits (~+/- 30%), then auto tune runs/corrections should be made so the updated tables are within those limits, so the system can be closed loop everywhere.
Title: Re: Closed Loop Lambda Range
Post by: Jamie Long on December 28, 2018, 08:24:50 AM
Target Tune calibrations do not use the Closed Loop Lambda Range table, they use the AFR/Lambda table as absolute
Title: Re: Closed Loop Lambda Range
Post by: Harley Pilot on December 28, 2018, 08:37:06 PM
Quote from: Jamie Long on December 28, 2018, 08:24:50 AM
Target Tune calibrations do not use the Closed Loop Lambda Range table, they use the AFR/Lambda table as absolute
Thank you, is it normal to see afr readings of 15.0 - 16.0 after resarts??
Title: Re: Closed Loop Lambda Range
Post by: rbabos on December 29, 2018, 08:02:10 AM
Quote from: Harley Pilot on December 28, 2018, 08:37:06 PM
Quote from: Jamie Long on December 28, 2018, 08:24:50 AM
Target Tune calibrations do not use the Closed Loop Lambda Range table, they use the AFR/Lambda table as absolute
Thank you, is it normal to see afr readings of 15.0 - 16.0 after resarts??
Wouldn't surprise me with a heat soaked IAT on restarts. It can be countered somewhat in the warmup table, then ignore it as it can never be dialed in 100% for all varying heat soak temps. Normal IAT temps is what you want to check the mixtures at.
Ron
Title: Re: Closed Loop Lambda Range
Post by: Harley Pilot on December 29, 2018, 08:06:17 AM
[quote


[/quote]
Wouldn't surprise me with a heat soaked IAT on restarts. It can be countered somewhat in the warmup table, then ignore it as it can never be dialed in 100% for all varying heat soak temps. Normal IAT temps is what you want to check the mixtures at.
Ron
[/quote]

Thanks, just making sure everything is as it should be as the Target Tune is new to me.