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« on: December 11, 2014, 10:12:44 AM »
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I can`t get this clear for me.
Which table/tables would consider VE in Me7, and how too improve it?
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« Last Edit: December 11, 2014, 10:15:02 AM by Mocke »
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nyet
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« Reply #1 on: December 11, 2014, 10:15:22 AM »
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There are many, many, many tables which depend on VE.
BTW changing those tables does not change the VE.
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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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Lost
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« Reply #2 on: December 11, 2014, 12:00:50 PM »
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BTW changing those tables does not change the VE.
[/quote]
I know that VE is beeing changed by hardware.
Can you be more specific about which tables?
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nyet
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« Reply #3 on: December 11, 2014, 01:21:58 PM »
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Depends on what you are trying to fix. Going through every table that has to be altered depending on VE would be a monumental task.
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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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Lost
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« Reply #4 on: December 11, 2014, 10:26:03 PM »
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Depends on what you are trying to fix. Going through every table that has to be altered depending on VE would be a monumental task.
I am not fixing anything. I just want to know, what, why, how..... |
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julex
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« Reply #5 on: December 12, 2014, 08:00:49 AM »
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I am not fixing anything.
I just want to know, what, why, how.....
Singularly most important map that can tell you what kind of efficiency engine is given NWS state and RPMs is map KFURL, it is used in conversion of air mass (PS, PS_W) to load (RL, RL_W) as visible in loggers and used through ME7. RL/RL_W is then naturally used downstream for everything. |
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« Reply #6 on: December 12, 2014, 09:01:02 AM »
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Singularly most important map that can tell you what kind of efficiency engine is given NWS state and RPMs is map KFURL, it is used in conversion of air mass (PS, PS_W) to load (RL, RL_W) as visible in loggers and used through ME7. RL/RL_W is then naturally used downstream for everything.
Alright, thanx Julex, I will look into this. |
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nyet
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« Reply #7 on: December 12, 2014, 11:46:00 AM »
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To what end? Small changes in VE aren't going to change the tune much; it will only screw up your req boost *even if you get it right* if you are targeting max power, and throw off the PID. rl is only used as a reference everywhere else, even if it is "wrong" you have to retune ALL the places where rl is used anyway.
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« Last Edit: December 12, 2014, 11:47:55 AM 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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Lost
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« Reply #8 on: December 12, 2014, 01:42:22 PM »
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To what end? Small changes in VE aren't going to change the tune much; it will only screw up your req boost *even if you get it right* if you are targeting max power, and throw off the PID. rl is only used as a reference everywhere else, even if it is "wrong" you have to retune ALL the places where rl is used anyway.
Learning and understanding. |
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nyet
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« Reply #9 on: December 12, 2014, 02:07:02 PM »
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Learning and understanding.
VE determines how much air mass is flowing through the motor for a given intake manifold pressure and RPM. Or the other way around: how much pressure is required to move a certain amount of air mass through the motor. Anywhere those calculations need to be done, VE is required. |
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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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prj
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« Reply #10 on: December 14, 2014, 04:49:54 AM »
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VE in ME7 is not used like it would be used in a standalone ECU.
The maps most related to VE are KFPBRK, KFPBRKNW, KFPRG, KFURL.
But technically you almost never need to change them. The most important part in ME7 is to have msdk_w and mshfm_w be as equal as possible, and make sure that ps_w is not much smaller than pvdk_w, otherwise you get into other sorts of trouble.
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Lost
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« Reply #11 on: December 14, 2014, 07:11:34 AM »
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VE in ME7 is not used like it would be used in a standalone ECU.
The maps most related to VE are KFPBRK, KFPBRKNW, KFPRG, KFURL.
But technically you almost never need to change them. The most important part in ME7 is to have msdk_w and mshfm_w be as equal as possible, and make sure that ps_w is not much smaller than pvdk_w, otherwise you get into other sorts of trouble.
I have noticed that reading a book on standalones. That's what made me interested of finding out and understanding it in our ECUs. Thanx for the info boys!! |
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nyet
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« Reply #12 on: December 14, 2014, 12:34:27 PM »
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make sure that ps_w is not much smaller than pvdk_w, otherwise you get into other sorts of trouble.
Or the other way around, if pvdk_w is near the ECU pressure limit and you aren't running the 5120 hack. |
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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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prj
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« Reply #13 on: December 18, 2014, 06:51:28 AM »
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Or the other way around, if pvdk_w is near the ECU pressure limit and you aren't running the 5120 hack.
Don't recommend it. Underscaling and messing with scaling results in lots of weirdness in load prediction and other code. |
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nyet
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« Reply #14 on: December 18, 2014, 10:58:03 AM »
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if ps_w is near the pressure limit you have no choice but to underscale, or run the 5120 hack.
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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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