Well, it's been done.
Yep, a WOT WB Closed Loop routine, has been done for an oem ecm.

Was a GN guy, and he's still thinking about weither he'll public domain it. But, it's now been done.

Also, just the other day a GN public domained a close loop boost control routine for the stock ecm.

Now that's what I call progress.

Just need someone to wrap all this good stuff into say a public domained source code, and we'd really be onto something

 

WOW!

 

BRB....Have to go wipe! I just sh*t myself!

Damn that is exciting news to hear! Looks like I'm getting into this stuff at a good time........ Evem if the stuff isn't made PD, the fact that it has been done makes the stuff move along faster! Progress......

 

Was it a c3 or p4? I've been thinking about this for the longest time but just couldn't figure out the transients. If you know the details... is the closed loop a learning the VE in case of sensor fail or is it just a pure closed loop requring feedback all the time?
Our PE-ltd still doesn't have a closed loop wideband support. It's quassi right now where there is an AI 0-5, so we can change the percent of fuel delivery from the AO of the wideband. I haven't tested it yet but we will be testing it this week, hopefully tomorrow.
In anycase, that is a huge step from just datalogging WB , I'm excited for whoever got it working. Is he thinking about marketing it or is the hush hush to keep punks from profitting off of his work?

 

JPrevost - are you talking about a Performance Electronics Ecu? Do you work for them, or do you have one? I tuned this and last year's Cal Poly SLO car with it.

Not the point of my post though.

Grumpy, am I correct in assuming the WB closed loop uses an aftermarket WB controller such as the Innovate Motorsports LM1?

Not to brag, but, about a month ago I got our FIT9 ECU running closed loop LM1 at all loads (including WOT, and with whatever A/F you want at different loads) and with LEARNING!!!! We've had learning for well over a year, very similar to GM learning, but with a normal switching EGO, disabled with Power Enrichment of course (remember that post!), but learned values from the high load cells are still applied. Works awesome, can just throw in a generated fuel map to get the car running and let learning calibrate for you (and it remembers it on powerdown) - almost too easy.

My question is, can you change the target at different loads? Can you use 0-5V, or what? What's done about the EGO ready criteria? Is PE somehow enabled, and if not, how is a stoichiometric VE map modified for appropriate base fueling (or is learning used to add the 17% or so fuel)? How about spark?

One thing the average user could do right now with a wideband with a configurable output is to have it output 450 mV at the desired A/F, limit the output to 1000 mV or so, and turn PE tps up to 100%. Also, if possible, reduce the 150 mV +/- deadband around the 450 mV closed loop target. This wouldn't take care of the different targets at different loads, but maybe in some ECUs that's possible. All the block learns would jump up by a certain factor, and your cat may start smoking if the air pump is still pumping air on that rich mixture in the cat, though, and the mileage would drop by a lot, but if measures are taken (remove problems, or two BIN's on a switch, and a switch from a standard EGO to a WB), it's not a problem.

Hope I'm not letting any cats out. If I am, email me and I'll edit the post.

 

Too late...

 

Here's the links to what Grumpy mentioned at the start of this thread, for anyone who might be interested.

http://www.turbobuick.com/forums/sho...hreadid=122516

http://www.turbobuick.com/forums/sho...hreadid=122422

or

http://www.t6p.com/forums/showthread.php?t=2398

Very cool stuff!

 

:hail: :hail: If someone would make it work on $58 and 8D it would be great!

/N.

 

This may be slightly off topic, but couldn't you use a Innovate or PLX setup that has a wideband output, hook it through the PLX wideband to narrow converter, and tap that into the ECM? That way the computer is seeing a wideband output that is converted to the expected naroowband values, except instead of the values "switching", the mV would be linear.

Check you this site: PLX Converter and the video: PLX Video .

Just a thought

 

That....................................

is very very cool stuff ;-)

Gonna have all kinds of neat options available when i get to tuning my TTA when the engine comes home.... and a wideband to do it with :-)

Hopefully the WOT closed loop patch sees the lite of day... Kinda nice that i now have the skills to apply a patch(even if it take sme ten tries lol) All this time fubaring around is getting me somewhere, and my car will be all the better for it ...

Suprised no one has gone after the factory boost controller stuff before, think almost everyoen that I can think of with a TR or turbo 6 powered vehicle has run into that...

Stuff makes u think, whats next?
later
JEremy
PS this was bookmarked for future use :-)

 

I'm the boost control patch author. I have to admit I couldn't figure out why no one did one before. I think too many of the GN crowd would prefer to use a bleeder valve because its cheap figuring only the import crowd are willing spend dollars on something electronic to control boost.

The controller could have lots of things done to it to make it better, I hope someone tries it out.

 

RednGold86Z, I don't work for PE-ltd but my Formula SAE team is a big part of his ecu development team. I say his because there are only 2 people that work PE-ltd. Brian Lewis is my contact and he's a lot of help. We've been running his ecu for almost 2 years now and they have used our car to test starting issues.
Grumpy, no reply?