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Rick
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« Reply #15 on: April 26, 2011, 12:42:30 PM »
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Changing LAMFA won't work.
Firstly, you need to disable closed loop in the RPM areas you wish to run leaner.
You need the map RLRUN, lower load threshold for closed loop operation. This is an 8x1 map of rpm against load. Closed loop will be disabled below this load. Leave closed loop alone for idle rpm, then from say 1300rpm until 4000 rpm you can disable closed loop by entering a high load value in these bins. Once you have done this, use KFLF to tune to the AFR you require in these load/rpm areas.
Rick
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240sxpooter
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« Reply #16 on: April 26, 2011, 01:46:20 PM »
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Changing LAMFA won't work.
Firstly, you need to disable closed loop in the RPM areas you wish to run leaner.
You need the map RLRUN, lower load threshold for closed loop operation. This is an 8x1 map of rpm against load. Closed loop will be disabled below this load. Leave closed loop alone for idle rpm, then from say 1300rpm until 4000 rpm you can disable closed loop by entering a high load value in these bins. Once you have done this, use KFLF to tune to the AFR you require in these load/rpm areas.
Rick
Is there no way to set a leaner target for closed loop operation? Its RLLRUN |
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« Last Edit: April 26, 2011, 01:48:47 PM by 240sxpooter »
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Rick
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« Reply #17 on: April 26, 2011, 02:14:03 PM »
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On narrowband - no. On wideband - maybe? There probably is but I've never worked with one.
Rick
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240sxpooter
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« Reply #18 on: April 26, 2011, 02:27:40 PM »
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On narrowband - no. On wideband - maybe? There probably is but I've never worked with one.
Rick
This might be a real easy solution= LALIUS It would need to be perfected with an external wide band. Change the sensor calibration to a richer lambda than it really is. Done |
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AudiA4_20T
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« Reply #19 on: April 26, 2011, 02:48:06 PM »
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question. This may sound dumb to you tuners but the closed loop/open loop thing confuses me. Is closed loop a condition that relies on pre-determined maps in the ECU and sticks to it, while open loop is constantly taking in data from the sensors and adjusting accordingly? That is my interpretation of it. I know that in certain circumstances though like a busted CTS or something will keep the car in closed loop, is this true?
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240sxpooter
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« Reply #20 on: April 26, 2011, 02:59:45 PM »
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question. This may sound dumb to you tuners but the closed loop/open loop thing confuses me. Is closed loop a condition that relies on pre-determined maps in the ECU and sticks to it, while open loop is constantly taking in data from the sensors and adjusting accordingly? That is my interpretation of it. I know that in certain circumstances though like a busted CTS or something will keep the car in closed loop, is this true?
I think you have it backwards. Open loop is when the ecu is using internal maps to calculate its outputs. Closed loop is when the ecu uses the internal maps + external sensors to calculate its outputs. |
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AudiA4_20T
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« Reply #21 on: April 26, 2011, 05:33:16 PM »
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question. This may sound dumb to you tuners but the closed loop/open loop thing confuses me. Is closed loop a condition that relies on pre-determined maps in the ECU and sticks to it, while open loop is constantly taking in data from the sensors and adjusting accordingly? That is my interpretation of it. I know that in certain circumstances though like a busted CTS or something will keep the car in closed loop, is this true?
I think you have it backwards. Open loop is when the ecu is using internal maps to calculate its outputs. Closed loop is when the ecu uses the internal maps + external sensors to calculate its outputs. Got it. And I suppose in closed loop there are a bunch of maps that the ECU "refers" to based on certain inputs? Trying to understand more how the ME.7 works |
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Rick
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« Reply #22 on: April 27, 2011, 12:32:56 PM »
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The maps used are the same for open loop and closed loop. The difference is in closed loop the ECU will correct anytime the target lamda doesn't equal the actual lambda.
LALIUS would be no good unless it was at least dependant on load or rpm or both.
Rick
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Giannis
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« Reply #23 on: April 27, 2011, 12:33:21 PM »
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Thank you all for the great answers. My friend 240sx i would prefer not to change the calibration of the LAMBDA sensor because as i told you before i have no other way to mesure the REAL AFR. @Rick i think your way is more right. How much sould i raise the values of the map? Stock values are 6.000 in all rpm range. I'm thinking that from 1200rpm to 4000rpm should be ok. @ A4_20T the big difference between open and closed loop is that, in an open loop system you set some target values for something (eg target lambda) and the output is calculated by various sensor data and other formulas but YOU HAVE NO MEANS TO CORRECT IT to the desired level in case that something goes wrong with your calculations or one sensor. In closed loop you have everything that i said before PLUS A FEEDBACK OPTION in the final output so that it can be corrected again to match the desired output. Sorry but my english don't help me a lot. I am no tuner just an amateur and this is what i have understood so far. Forums literature and other people with much more knowledge than me helped me a lot. There are many of them in here.  |
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Rick
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« Reply #24 on: April 27, 2011, 12:38:16 PM »
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I find a good load threshold is around 60-70.
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Giannis
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« Reply #25 on: April 27, 2011, 12:39:48 PM »
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Thank you very much Rick i will test them and post the results.
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240sxpooter
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« Reply #26 on: April 27, 2011, 12:48:49 PM »
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Thank you all for the great answers. My friend 240sx i would prefer not to change the calibration of the LAMBDA sensor because as i told you before i have no other way to measure the REAL AFR. The sensor would still work just fine the scale could just be shifted and you could use the ecu to target the leaner lambda @Rick i think your way is more right. How much sould i raise the values of the map? Stock values are 6.000 in all rpm range. I'm thinking that from 1200rpm to 4000rpm should be ok. @ A4_20T the big difference between open and closed loop is that, in an open loop system you set some target values for something (eg target lambda) and the output is calculated by various sensor data and other formulas but YOU HAVE NO MEANS TO CORRECT IT to the desired level in case that something goes wrong with your calculations or one sensor. In closed loop you have everything that i said before PLUS A FEEDBACK OPTION in the final output so that it can be corrected again to match the desired output. Sorry but my english don't help me a lot. I am no tuner just an amateur and this is what i have understood so far. Forums literature and other people with much more knowledge than me helped me a lot. There are many of them in here. RLLRUN = 160A4 in a 018M ecu |
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Giannis
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« Reply #27 on: April 28, 2011, 05:23:04 AM »
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Great news guys!! closed loop seems to be inactive now. I am not getting any lambda addaptation values in vagcom channel 33 now, although i am running rich. Now i supose i much callibrate FKKVS to reach the desired AFR. An other happy sideffect of turning off closed loop is that by turning off ECU addaptation ability, you can calibrate your injectors much more easily because you can see the real AFR from the injection map applied. I will keep you informed thank you again.
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Rick
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« Reply #28 on: April 28, 2011, 01:52:24 PM »
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Cool, glad it's working for you  |
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Giannis
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« Reply #29 on: May 01, 2011, 01:53:27 AM »
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Rick i am still running rich. Witch maps should i use to fine tune my injectors? I also noticed that by tuning KFLASWLR seems the requested lambda changes for 1.00 to whatever you set it to. Have you tried to use this map to reach lambda 1.10 without dissabling the closed loop?
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