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motor

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  4. [UPDATE] PCLink 5.6.6.3564 (on hold)

    in G4+

    Posted

    On 8/25/2018 at 11:34 PM, jetape said:

    Has something changed with pc log saving as far as automatic naming?  Before this updated when saving it automatically filled in the log file name with a nice timestamp, now the name is blank and you have to manually type something.  The timestamp names were really handy for quick saving without having to think about it, especially when working on a tablet where you wan to avoid typing.

    I have the same issue.

  5. I have a DBW close loop idle issue

    in G4+

    Posted

    17 hours ago, cj said:

    It looks like that while CL idle is active, whenever you press the throttle to the point where you exceed the AP lockout threshold, it adds 0.4 to the CL idle trim immediately. I cant see where its getting this 0.4 from so it might be hardcoded, or it might be some multiple of your proportional gain or ethrottle base numbers. I assume the idea here is to have it gently return to idle RPM rather than try to "catch the stall" that happens with low ethrottle targets where the RPM can drop really quickly below where you want it.

    You can see that in the 8 times you blip the throttle, it adds 0.4% for each of the first 7, and between them when you're at 0% AP, the CL logic is actually doing its thing to reduce the CL % as soon as you get off the gas pedal (note at 32.2 sec that the CL number drops from 1.0 to 0.9 and status is DEC IDLE). On the 8th blip of the throttle something different happens though because the RPM is already so high from the current throttle angle, that you are above the RPM lockout for CL idle, and this time the CL% doesnt move at all. In the later part of your log it start off the RPM is too high for CL to kick in and reduce the CL% (so catch 22 here), but eventually overrun ignition trim kicks in and pulls 10 deg of timing (35-36sec) because you are under 0.5% AP and over 1500RPM, which drags the RPM down enough for CL to kick in and start removing the CL trim% until you get back to normal idle at CL 0.1-0.2%. I'm not sure if you set this up on purpose to catch this or its just a co-incidence that it does a pretty good job of fixing the catch 22 of too high an idle RPM for CL to fix itself.

    As far as how you fix this, you could try changing your open loop trims, proportional gain table, or ethrottle target table by a bit and see if you can influence that 0.4% number that is getting added. You could also try adding quite a bit the the proportional gain table to get it to drop CL% quicker once off the throttle. The link guys might have some info on the background logic at work here as to where this 0.4% comes from and why its being added every time you cross the AP throttle lockout number rather than just the first time like I would expect if its to ensure a smooth return to idle. You could work around it by just not blipping the throttle this many times this quickly so it has time to return to normal idle. I dont think increasing any of the CL lockout parameters will help much - increasing the lockout RPM you are just trading off how many times you can blip the throttle against how bad a high idle you have once you hit the problem. You might somewhat fix it by lowering the RPM lockout by quite a lot - it will still have the same CL % getting added but if the idle RPM exceeds lockout on the first or seconds throttle blips, its only going to be say 200RPM above target anyway and from this RPM you can probably tune your idle ignition control to pull back  timing and get you back to where CL idle will work correctly. Its all a bit of a workaround though.

    Hi CJ,Thank you very much for your input, thank you for reading my log carefully, you are right and very detailed! Forgive my English。
    Regards!

  8. I have a DBW close loop idle issue

    in G4+

    Posted

    Already tested as you said, but still the same as before。please see log file，thanks!

     

     

    On 8/16/2018 at 11:02 AM, Adamw said:

    I tested the fix for the problem that "a6-quattro" reported above using his map and it seemed to work correctly.  I assumed you were reporting the same problem but now after looking at your map I think it maybe just because your E-throttle target and base position tables are set up wrong.  The top row of the E-throttle target should not have zero in it.  Usually this should have most of the idle throttle requirement "%" for normal hot idle in the top row of the target table, the base position table should only have small numbers in it to allow for fast idle warm up and small correction to normal idle. 

    Can you try to set up your base position and target tables like this and give us a new log and map if it is still not right for you.

     

    IOwvDGe.png

    On 8/16/2018 at 11:02 AM, Adamw said:

    I tested the fix for the problem that "a6-quattro" reported above using his map and it seemed to work correctly.  I assumed you were reporting the same problem but now after looking at your map I think it maybe just because your E-throttle target and base position tables are set up wrong.  The top row of the E-throttle target should not have zero in it.  Usually this should have most of the idle throttle requirement "%" for normal hot idle in the top row of the target table, the base position table should only have small numbers in it to allow for fast idle warm up and small correction to normal idle. 

    Can you try to set up your base position and target tables like this and give us a new log and map if it is still not right for you.

     

    IOwvDGe.png

    Already tested as you said, but still the same as before。please see log file，thanks!

     

     

     

  13. I have a DBW close loop idle issue

    in G4+

    Posted

    I have a DBW close loop idle issue,When I gently repeatedly step on the accelerator pedal, the“E throttle ISC CL Trim” add a little value about 2.5%.What kind of control logic is this? This automatically added value adversely affects closed-loop idle speed control.
    please see log  for details, thanks!(This happened  file time 0:03.630 and 0:26.654 )

     

     

  15. E throttle cl idle control

    in G4+

    Posted

    I have the same issue in my 2jzgte stock E throttle,open loop idle control is ok,but go to closed loop  the E throttle ISC CL Trim add  a little value of no reason,caused  idle speed can't  fall to target value.vehicle speed signal has been connected and set correctly.
    This issue has troubled me for a long time.

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