RSC
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« on: January 03, 2019, 04:30:38 PM »
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Hi ! In my way to understand how kfldimx and kfldrl works ,(to understand and learn how to play with boost ) i thinked dimx axis is lde but no ! Is plsorl_w which i dont know what means and drl axis is ldtvr_w,someone can explain in simple sentences what plsorl and ldtvr is ?
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nyet
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« Reply #1 on: January 03, 2019, 04:47:35 PM »
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Hi ! In my way to understand how kfldimx and kfldrl works ,(to understand and learn how to play with boost ) i thinked dimx axis is lde but no ! Is plsorl_w which i dont know what means and drl axis is ldtvr_w,someone can explain in simple sentences what plsorl and ldtvr is ?
Did you bother to read either the FR OR the tuning wiki page? https://s4wiki.com/wiki/Tuning#Boost_PIDKFLDIMX - LDR I-Regulator limit. The x-axis input is relative requested pressure (plsolr_w) in hPa (same as mBar), which, in the M-Box, is "requested absolute pressure (plsol_w)" - "ambient pressure (pu_w)".
KFLDRL - Map for linearization of boost pressure = f(TV). This is the post-PID waste-gate duty correction table. The result of the PID (ldtvr_w) is the input to this map. The actual DC (ldtv) is the output of this map. All of the results of the PID end up in this table to be linearized. That is to say, if you have a flat DC going into KFLDRL (ldtvr_w), the result should be a flat actual boost (most likely requiring a rising ldtv, and thus a rising KFLDRL for a given input ldtvr_w). Calibrating this correctly is time consuming, but worth the effort.[30]
Why did I bother if nobody is going to read it :/ |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #2 on: January 03, 2019, 04:59:32 PM »
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oh fuck .... was a big question and i thinked is more harder and i will not find an answare in s4..... i was so wrong ! Sorry and thank you ! |
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RSC
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« Reply #3 on: January 03, 2019, 05:18:02 PM »
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and another big question for me, i understood the imx map axis is plsolr (boost pressure ) and i think the output of this map is wgdc ! let’s say i will want to run 1300 mbar boost pressure , i need to scale the axis to 1300 mbar ,and the numbers will be 99 (this means 99%wgdc ! Ok until there ,but how ecu will open wg to dont make overboost ? |
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nyet
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« Reply #4 on: January 03, 2019, 05:20:32 PM »
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IMX is only the I component limiter. It is not the actual final pre-lin (not post-lin) DC.
Research PIDs. They are beyond the scope of this forum (and the s4 tuning wiki page for that matter).
BTW there is zero reason to scale the IMX axis unless you are using IMX for pre-control and/or very high boost application.
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« Last Edit: January 03, 2019, 05:22:24 PM by nyet »
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #5 on: January 03, 2019, 05:26:24 PM »
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IMX is only the I component limiter. It is not the actual final pre-lin (not post-lin) DC.
Research PIDs. They are beyond the scope of this forum (and the s4 tuning wiki page for that matter).
BTW there is zero reason to scale the IMX axis unless you are using IMX for pre-control and/or very high boost application.
i dont run on very high boost ,i just wanted to understand how wgdc is working ,how is it calculated and if i can incerease boost without ldrxnf irl iop(just from n75maps ) |
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nyet
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« Reply #6 on: January 03, 2019, 05:28:47 PM »
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i dont run on very high boost ,i just wanted to understand how wgdc is working ,how is it calculated
That would be via LDRPID if i can incerease boost without ldrxnf irl iop(just from n75maps )
No. There is zero reason to even bother thinking that. Get req boost where you want it. Tune the PID so actual matches req. It isn't hard, especially with stock hardware. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #7 on: January 03, 2019, 05:36:52 PM »
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No. There is zero reason to even bother thinking that. Get req boost where you want it. Tune the PID so actual matches req. It isn't hard, especially with stock hardware.
i think i will run on an harder wg spring , and becouse i.m a begginer ,i want to understand how to play with whdc how ecu will manage it after req meet actual boost ,i think this is a map with pressure mbar and it output is wgdc ,and snother problem is how ecu will manage it when actual is lower than requested boost .... |
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nyet
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« Reply #8 on: January 03, 2019, 05:39:28 PM »
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i think i will run on an harder wg spring
I have no idea what problem you think that will solve. If anything, it will make tuning part throttle a huge pain in the ass, and for no real gain elsewhere. I want to understand how to play with whdc how ecu will manage it after req meet actual boost ,i think this is a map with pressure mbar and it output is wgdc ,and snother problem is how ecu will manage it when actual is lower than requested boost ....
Not sure how many more times you have to be told that that is what a PID does. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #9 on: January 03, 2019, 05:41:27 PM »
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I have no idea what problem you think that will solve.
If anything, it will make tuning part throttle a huge pain in the ass, and for no real gain elsewhere.
Not sure how many more times you have to be told that that is what a PID does.
car is used only for dragracing ! |
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nyet
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« Reply #10 on: January 03, 2019, 05:43:12 PM »
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car is used only for dragracing !
Not sure how that is relevant. Are you saying that is why you want to run a stiffer spring (because part throttle doesn't matter), or so that you can avoid learning about PIDs? Either way 1) don't run a stiffer spring than you need (and from your logs, there is NOTHING to indicate you need a stiffer wg spring) 2) you should learn how PIDs work |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #11 on: January 03, 2019, 05:45:28 PM »
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IMX is only the I component limiter. It is not the actual final pre-lin (not post-lin) DC.
which is the map for pre lin wgdc ? |
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nyet
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« Reply #12 on: January 03, 2019, 05:46:23 PM »
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which is the map for pre lin wgdc ?
That question has no meaning. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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nyet
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« Reply #13 on: January 03, 2019, 05:47:41 PM »
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You should be asking why IMX dominates all other PID outputs....
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RSC
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« Reply #14 on: January 03, 2019, 05:48:39 PM »
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2) you should learn how PIDs work
you’re so right ,and i will start to do it,i wish i will found all the answare for my questions! And yes ,for mee dont metter the part throttle ! |
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