BMW EDC16C31 Dynamic EGR

by **juice** » Sun Dec 30, 2018 10:54 am

Hi folks, i know the solution for VW ecu's where dynamic EGR helps engine on faster warming up.
Any idea if there is any solution for BMW edc16 ecu ? To keep EGR active until 70 - 75 degrees, then totally close it.
Thanks.

by **ztig** » Fri Feb 01, 2019 12:00 am

Hello, sorry for changing the subject but how about the dynamic egr for edc15?
I know what raivwo said in a different topic but I'm unsure as to how to convert the values to celsius degrees...

raivwo wrote:There is sequence 02951 02931 00900 00880 03931 03881
first two values is min coolant temperature for EGR function 22 and 20'C
next is minimal atmosphere pressure 900 and 880mbar for the same
and last is max coolant temperature for EGR function 120 and 115'C
Just change Patm values to 1100 and 1080 and EGR is OFF until Patm reaches 1100mbar :)
I found this solution, and it works 100%

by **Shooting** » Fri Feb 01, 2019 10:37 am

ztig wrote:Hello, sorry for changing the subject but how about the dynamic egr for edc15?
I know what raivwo said in a different topic but I'm unsure as to how to convert the values to celsius degrees...
raivwo wrote:There is sequence 02951 02931 00900 00880 03931 03881
first two values is min coolant temperature for EGR function 22 and 20'C
next is minimal atmosphere pressure 900 and 880mbar for the same
and last is max coolant temperature for EGR function 120 and 115'C
Just change Patm values to 1100 and 1080 and EGR is OFF until Patm reaches 1100mbar :)
I found this solution, and it works 100%

Try here first --> introduce-yourself

wbr

by **ztig** » Tue Feb 05, 2019 9:43 pm

Hmm, I don't get it why anyone wants an introduction? Do you determine someone's skills based on it or what's the point? :?:

by **Shooting** » Tue Feb 05, 2019 10:24 pm

ztig wrote:Hmm, I don't get it why anyone wants an introduction? Do you determine someone's skills based on it or what's the point? :?:

Do you think we give info etc to strangers? .. it's called respect for the rules..

wbr

by **ztig** » Tue Feb 05, 2019 10:37 pm

Its not like you get to know me in person or all my history... so still pointless but I get it. Communities are about helping each other and without an introduction I can't be part of the community. Got it in the end. Sorry.

For future reference, editing a post is not possible? I didn't want to make this post just to increase my post count... so an edit would of been perfect. EDIT: An edit button just showed for this post... weird.

Also not to make an increase in post count, now that I put up an introduction and I'm eager to learn, how is that celsius conversion done? I don't get it.
Thanks and sorry.

by **juice** » Sun Jun 02, 2019 5:38 am

Dynamic EGR solution fixed, i will post here
These are IQ related EGR hysteresys (Axis is rpm, values is IQ), this is for EGR off, just refreshing the minds.
E21FA 16x1 AirCtl_qHigh_CUR
E22A2 16x1 AirCtl_qLow_CUR

These are temperature related EGR hysteresys. Just set them at around 50* or 70* and this will disble EGR by coolant temp.
E2346 (single value 16bit HiLo) AirCtl_tClntWrmHi_C
E2348 (single value 16bit HiLo) AirCtl_tClntWrmLo_C
First value is when EGR goes OFF(highest temperature), then second is when comes back ON.

by **jovanzac** » Thu Sep 26, 2024 6:57 am

Hello,

I have E60 525d with 390905 where EGR hysteresis is 4x1 x 2 maps. This way EGR is off but MAF desired and boost desired are not the same as actual.
With this temp mode, will it be same as when engine is not hot and all the settings will be as if there is no conditions for EGR to work fully ? What values should Iset in order to disable EGR when engine reaches let say operating temp of 70 degrees ? Also, will shutter valve work when engine shuts off ?
And dont know where but I have read somewhere that voltage for EGR to operate should be changed, from default 8.9 to let say 5 but my intake shutter valve did not work when engine shutting off and I got DTC for it.

Thank you and sorry for long reply.

by **jovanzac** » Sun Oct 27, 2024 11:52 am

jovanzac wrote:Hello,

I have E60 525d with 390905 where EGR hysteresis is 4x1 x 2 maps. This way EGR is off but MAF desired and boost desired are not the same as actual.
With this temp mode, will it be same as when engine is not hot and all the settings will be as if there is no conditions for EGR to work fully ? What values should Iset in order to disable EGR when engine reaches let say operating temp of 70 degrees ? Also, will shutter valve work when engine shuts off ?
And dont know where but I have read somewhere that voltage for EGR to operate should be changed, from default 8.9 to let say 5 but my intake shutter valve did not work when engine shutting off and I got DTC for it.

Thank you and sorry for long reply.

Hello to all,

I have tried this dynamic EGR off and it works but eith one, for me, major minus. Boost desired and actual are same, MAF desired is lower than actual but not as much as with IQ hysteresis EGR off. But, intake shutter valve does not work and engine shut off is not smooth.

I will try Patm mode for EGR off but I think that it will have the same outcome becise all this AirCtl switches are in air control monitor section.

I want to find some mao which controls and tells the ecu to actuate EGR rate in corelation with engine temp and intake temp. What i have found is that egr rate is 15% when engine is 40 degrees and 60% with 60 degrees so there must be some factor map for this

by **jovanzac** » Sun Oct 27, 2024 3:04 pm

jovanzac wrote:
jovanzac wrote:Hello,

I have E60 525d with 390905 where EGR hysteresis is 4x1 x 2 maps. This way EGR is off but MAF desired and boost desired are not the same as actual.
With this temp mode, will it be same as when engine is not hot and all the settings will be as if there is no conditions for EGR to work fully ? What values should Iset in order to disable EGR when engine reaches let say operating temp of 70 degrees ? Also, will shutter valve work when engine shuts off ?
And dont know where but I have read somewhere that voltage for EGR to operate should be changed, from default 8.9 to let say 5 but my intake shutter valve did not work when engine shutting off and I got DTC for it.

Thank you and sorry for long reply.

Hello to all,

I have tried this dynamic EGR off and it works but eith one, for me, major minus. Boost desired and actual are same, MAF desired is lower than actual but not as much as with IQ hysteresis EGR off. But, intake shutter valve does not work and engine shut off is not smooth.

I will try Patm mode for EGR off but I think that it will have the same outcome becise all this AirCtl switches are in air control monitor section.

I want to find some mao which controls and tells the ecu to actuate EGR rate in corelation with engine temp and intake temp. What i have found is that egr rate is 15% when engine is 40 degrees and 60% with 60 degrees so there must be some factor map for this

I have tried Patm EGR off, meaning EGR will work if Patm is above 1200hpa. It works, intake shutter valve is working, smooth shutdown of the engine. Desired boost is circa the same, MAF not so. Engine pulls good. I hope DPF regen and function is not affected withbthis mode.

Will update