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Author Topic: ME7.9.10 - Understanding the torque model  (Read 177457 times)
overspeed
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« Reply #45 on: August 08, 2017, 01:43:24 PM »


Essesse versions for example has a 300Kpa MAP 0281002437.

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robotchip
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« Reply #46 on: August 11, 2017, 07:24:10 AM »

I know essesse use 300kPa map sensor and i'm working on this ecu.
The problem is that i can reach 300kPa boost target ... i don't undesrtand where is VE map in this ecu. In Bosch ME7.1  the map KFURL shows how to convert boost to load in function of °kw and rpm, but in me7.9.10 i can't find any similar maps... i think that the key to reach the requested boost is this hidden map.
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woj
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« Reply #47 on: August 11, 2017, 09:09:25 AM »

It is probably because of one of the load or turbine compressor limiters that this ECU has plenty of. What ECU definition are you using? Post the bin, I might be able to help you (but just _might_).
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IamwhoIam
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« Reply #48 on: August 18, 2017, 06:24:34 AM »

woj, you have a PM
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I have no logs because I have a boost gauge (makes things easier)
woj
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« Reply #49 on: August 18, 2017, 03:04:51 PM »

Answer to the request. It is possible to find, but you would have to register on a couple of foreign speaking forums.
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robotchip
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« Reply #50 on: August 21, 2017, 06:43:29 AM »

It is probably because of one of the load or turbine compressor limiters that this ECU has plenty of. What ECU definition are you using? Post the bin, I might be able to help you (but just _might_).

Attached you will find ori and mod:  boost target  doesn't reach 300kPa, only 282 kPa at 2500 rpm than it goes down to 255 kPa.
Please look if there are any limiters that i don't know.
I need only to set the boost target to 300kPa, nothing else.
Thanks in advance
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woj
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« Reply #51 on: August 22, 2017, 12:53:53 PM »

Can't help you with your particular binaries, they do not match any of my definitions (and I do not have that many), even after chopping a 64K block out (0x8000-0x18000) that is normally not included on readouts from this ECU (BTW, which program read this binary out?). Nice to have a new binary, haven't seen this one before Wink

But, below a shot of a handful of maps from my Abarth bin that I believe could be the ones that you should look for. I am quite certain that this is not complete, but these are some obvious candidates. Most of them sit in the BGRLMX module, two in MDRLMAX (the two torque limiters, these you have probably not missed), and one in BGPVD (but this one I believe is irrelevant). Something tells me there was one more scalar value somewhere, but I cannot recall what it was at the moment, will re-post when I do. Hope that helps a tiny bit.
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robotchip
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« Reply #52 on: August 22, 2017, 03:17:45 PM »

Hello,

look at attached screenshot of the logged parameters...
Intake pressure is 2560 mbar (in mechanical boost gauge i read 2800 mbar) even if the map sensor is recalibrated up to 300 mbar, i think that is a problem of the convertion value of the diagnostic.
Desired boost don't go over 2751 mbar...  Embarrassed
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IamwhoIam
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« Reply #53 on: August 22, 2017, 04:36:42 PM »

robotchip, first off, your "abarth.ori" file isn't stock.... second, maybe you should take a look at all the maps you've modified, some values don't make much sense vs others... Also, you've (inadvertently) redimensioned at least ONE map, which makes me wonder how your car even runs...
« Last Edit: August 22, 2017, 04:59:14 PM by IamwhoIam » Logged

I have no logs because I have a boost gauge (makes things easier)
robotchip
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« Reply #54 on: August 22, 2017, 11:22:45 PM »

Hello,  the file "abarth.ori" is stock file from 500 abarth "tributo ferrari" 180 hp.
The file .mod is a test to see if the boost requested would go over 300 kPa, but the log shows that it doesn't reach 300 kPa. Do you know how this ecu calculate target Load ? It's not like standard me7 Vag.
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woj
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« Reply #55 on: August 23, 2017, 01:15:08 AM »

I have to question the stock-dness of your ori file too, the checksum does not add up, see attachments. I named and reorganised your files so that they have the more common layout and are more likely to fit existing definitions if anybody else wants to have a look at it.

I am worried about you talking about scaling the MAP sensor. If these are 3bar MAP sensors (which I believe they should be in a 180 hp version) then you should not be touching any MAP sensor scaling. (But you should also not be trying to go with boost up to 2 bar, you should have a margin to let the regulation do its job). If it is a 2.5 bar MAP sensor and you are trying to push the boost to 2 bar by "scaling" things, then I am afraid this has little chance of success.

And yes, the diagnostics will only show you 2560 mbar capped value for the intake pressure, but you can see that the load is calculated properly and goes above that (from what I can see).


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woj
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« Reply #56 on: August 23, 2017, 01:16:17 AM »

The other two attachments, pressed the wrong buttons :/
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robotchip
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« Reply #57 on: August 23, 2017, 02:05:33 AM »

Hello,
I'm sorry to have bad named the files and not checksummed the mod but my tool calculate checksum only in writing.
I summarize the problem to make understand all, i think it will be useful to study a solution for who have to tune similar car with strong mechanical modification.
The Car is 500 abarth 180 hp with bigger turbocharger TD04HL;
Map sensors are 300kPa (stock are so) and they don't need to be recalibrate;
With attached mod file  the boost requested doesn't reach 300 kPa even if map sensors can read properly 300kPa.
We need to know how this ecu calculate load/boost requested so that we can calibrate boost without problem.
I have seen Revlimit had done  gpa over 400 hp with more than 300kPa boost and stock ecu.
I hope it will be useful to study for all.

« Last Edit: August 23, 2017, 02:17:49 AM by robotchip » Logged
IamwhoIam
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« Reply #58 on: August 24, 2017, 03:58:30 AM »

Your "stock" file isn't stock. Wrong checksums indicates that 100%. You made some beginner mistakes in your "test file" and you don't even seem to be aware of that.
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I have no logs because I have a boost gauge (makes things easier)
robotchip
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« Reply #59 on: August 24, 2017, 01:40:37 PM »

Your "stock" file isn't stock. Wrong checksums indicates that 100%. You made some beginner mistakes in your "test file" and you don't even seem to be aware of that.

Thanks to tell me the mistake, you are right, the file isn't the correct stock  Cheesy ! i'm sorry, however, few days ago i did some other tests on Grande Punto SS 180 hp to see if it is possible to get 300kPa desidered boost (this car has 300kPa Map sensor from the factory).
Attached you will find stock file, test file and the screenshot of the log.
I'm afraid that it isn't possible to have 300kPa desidered boost without install a new MAP sensor with full scale 350 kPa..



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