closed loop

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techsalvager
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closed loop

Post by techsalvager »

Is there anyways I can get closed loop operation separate from the AFR target table?
MS2extra
Mass Air Flow fuel and spark
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rickb794
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Re: closed loop

Post by rickb794 »

?????? "Closed loop" is the purpose of the AFR target table!

Auto tune borrows it for reference...
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techsalvager
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Re: closed loop

Post by techsalvager »

If I tell it to use a narrowband instead and target stoich will it still use the afr target table or will it target stoich off the narrowband unless it goes above or below the set map\tps\etc
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
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techsalvager
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Re: closed loop

Post by techsalvager »

rickb794 wrote:?????? "Closed loop" is the purpose of the AFR target table!

Auto tune borrows it for reference...
It is also my Main commanded fuel table which all my fueling is done from.
So you can see where I have an issue
Its both my commanded fuel table and my closed loop fuel table, but I need to separate them.
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
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jsmcortina
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Re: closed loop

Post by jsmcortina »

Your request isn't making a lot of sense.

What are you trying to achieve.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

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techsalvager
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Re: closed loop

Post by techsalvager »

find out if its possible to run a separate closed loop table or closed loop switch point from the AFR target table.
the AFR target table is my main fuel table
I want to separate these two if possible

If I can do it by suggesting a lambda switch point from a narrowband instead that will work for me as well.
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
TechSalvager is banned for ignoring admin warnings not to link to his childish videos.
techsalvager
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Re: closed loop

Post by techsalvager »

Narrow Band O2 Sensor If you have enabled a narrow band oxygen sensor, choose 'Narrow Band' under EGO Sensor Type in MegaTune, and MegaSquirt-II will try to adjust the amount fuel injected, up to the limits you specify, to give the oxygen sensor voltage specified in the tuning software. The AFR table is not used, instead a single oxygen sensor voltage target is used.

I read this in the documenetation, I guess I will try and report back if that works so I can use afrtarget table soley for main fuel table and keep the closed loop operation from using it.
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Mass Air Flow fuel and spark
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jsmcortina
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Re: closed loop

Post by jsmcortina »

techsalvager wrote:find out if its possible to run a separate closed loop table or closed loop switch point from the AFR target table.
the AFR target table is my main fuel table
I want to separate these two if possible
Certainly not as that would defeat the purpose of it being an AFR target table.
If I can do it by suggesting a lambda switch point from a narrowband instead that will work for me as well.
That would make it no longer target your AFR targets, which is therefore pointless.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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techsalvager
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Re: closed loop

Post by techsalvager »

well yes I agree
unfrountaly the main fuel table ( afr target table ) and the closed loop table ( afr target table ) are the same
and I have no option to change that off hand
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
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techsalvager
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Re: closed loop

Post by techsalvager »

if I could switch my main fuel table to the area that ve table 1 uses then I wouldn't have this issue.
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
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jsmcortina
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Re: closed loop

Post by jsmcortina »

Well why don't you then?

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
muythaibxr
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Re: closed loop

Post by muythaibxr »

techsalvager wrote:well yes I agree
unfrountaly the main fuel table ( afr target table ) and the closed loop table ( afr target table ) are the same
and I have no option to change that off hand
The main fuel table is the VE table not the AFR table. The AFR table can be used to normalize the VE table if you incorporate AFR into the fuel equation. Otherwise the AFR table's only use is for closed loop operation with a wideband sensor.

With a narrowband, just set a switchpoint, turn off incorporate AFR, ignore the AFR table, and tune the VE table.

Ken
Megasquirt is not for use on pollution controlled vehicles. Any advice I give is for off road use only.
techsalvager
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Re: closed loop

Post by techsalvager »

My VE table 1 is full of 100s and does nothing, completely useless space. I will upload a datalog in a few minutes
jsmcortina wrote:Well why don't you then?

James
because I can't code well enough to do it.
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
TechSalvager is banned for ignoring admin warnings not to link to his childish videos.
rickb794
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Re: closed loop

Post by rickb794 »

Are you saying that your VE table lower left corner is not smaller than the upper right corner? (Or not significantly smaller?)

Are you using a fixed fuel pressure? Or do you have some goofy manifold referenced pressure regulator?

Have you set (or altered) your injector dead time?

Does your Warm Up Enrichment end at a value different than 100%?
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
techsalvager
Master MS/Extra'er
Posts: 443
Joined: Sat Jun 28, 2008 3:47 am

Re: closed loop

Post by techsalvager »

Image
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
TechSalvager is banned for ignoring admin warnings not to link to his childish videos.
techsalvager
Master MS/Extra'er
Posts: 443
Joined: Sat Jun 28, 2008 3:47 am

Re: closed loop

Post by techsalvager »

rickb794 wrote:Are you saying that your VE table lower left corner is not smaller than the upper right corner? (Or not significantly smaller?)

Are you using a fixed fuel pressure? Or do you have some goofy manifold referenced pressure regulator?

Have you set (or altered) your injector dead time?

Does your Warm Up Enrichment end at a value different than 100%?
I'm saying the ve table has no real use in my setup, you can put whatever numbers you want into it and it will allways be at 100 durning operation.
So there is wasted space that could be used for a fuel table.
Just a normal FPR that takes from manifold pressure.
rx7 460cc injectors with a dead time of .75ms at 13.2v
WUE still ends at 100%
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
TechSalvager is banned for ignoring admin warnings not to link to his childish videos.
rickb794
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Posts: 6155
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Location: Portland OR

Re: closed loop

Post by rickb794 »

I did not realize you were using MAF. I have no usefull input in that area.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
techsalvager
Master MS/Extra'er
Posts: 443
Joined: Sat Jun 28, 2008 3:47 am

Re: closed loop

Post by techsalvager »

no problem rick
unfrountaly to use closed loop operation I have to switch to narrowband and switch my aem WB to simulated narrowband output mode.
works well enough
MS2extra
Mass Air Flow fuel and spark
Miata 1.6 turbo
TechSalvager is banned for ignoring admin warnings not to link to his childish videos.
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