VVL thresholds / parameters / logic

td-d · **Posted:** Tue Sep 25, 2012 7:01 pm

MOVED TO POST 1

MFB · **Posted:** Tue Sep 25, 2012 7:16 pm

Hi Oren, I have an Xv I can log for you.

td-d · **Posted:** Tue Sep 25, 2012 7:20 pm

MFB wrote:

Hi Oren, I have an Xv I can log for you.

Great - I assume it's the 2012 I put the definition together for? Will have a look for the relevant areas, and let you know.

MFB · **Posted:** Tue Sep 25, 2012 11:15 pm

td-d wrote:

MFB wrote:

Hi Oren, I have an Xv I can log for you.

Great - I assume it's the 2012 I put the definition together for? Will have a look for the relevant areas, and let you know.

Yep

http://www.romraider.com/forum/viewtopic.php?f=34&t=8611

td-d · **Posted:** Wed Sep 26, 2012 2:13 am

MFB wrote:

Hi Oren, I have an Xv I can log for you.

Ah well... so much for that:

Code:

ROM:00057CB0
ROM:00057CB0 SsmGet_VVL_Lift_Mode_P127:              ; DATA XREF: ROM:PtrSsmGet_VVL_Lift_Mode_P127o
ROM:00057CB0                 rts
ROM:00057CB2                 mov     #0, r0

throttlehappy · **Posted:** Wed Sep 26, 2012 7:15 am

As far as I am aware, only the H6 had VVL

2.0L has normal cams.

k3ys3r · **Joined:** Thu Apr 19, 2012 7:33 am **Posts:** 17

http://drive2.subaru.com/Spring07_whatmakes.htm

This suggests that it is also present on all 2.5L n/a engines post 2007

throttlehappy · **Posted:** Wed Sep 26, 2012 8:06 am

k3ys3r wrote:

http://drive2.subaru.com/Spring07_whatmakes.htm

This suggests that it is also present on all 2.5L n/a engines post 2007

Hmm, guess I need to recheck the NA Foresters I have done then! Would explain the timing tables though!!

td-d · **Posted:** Wed Sep 26, 2012 8:24 am

I was about to note - not on the 2.0l it seems, but on the NA 2.5's.

E.g. 2008 Legacy

Code:

ROM:00002000 aE2tb101l_0:    .sdata "E2TB101L"       ; DATA XREF: ROM:off_FFB80o
ROM:00002000                 .data.b 0
ROM:00002009 a25th4nEuAt_0:  .sdata "25TH4N EU AT           "

Code:

ROM:00055E0A ; ---------------------------------------------------------------------------
ROM:00055E0A
ROM:00055E0A SsmGet_VVL_Lift_Mode_P127:              ; DATA XREF: ROM:PtrSsmGet_VVL_Lift_Mode_P127o
ROM:00055E0A                 mov.l   #Ram_VVL_Lift_Mode, r3
ROM:00055E0C                 rts
ROM:00055E0E                 mov.b   @r3, r0

dschultz · **Posted:** Wed Sep 26, 2012 10:40 am

It shows on the 2008/09 USDM Subaru Impreza 2.5i MT EZ1E401G

Attachment:

vvl.png

td-d · **Posted:** Wed Sep 26, 2012 12:24 pm

Ok - here's what I have so far for D2WD701C. There are other single float parameters relating to oil temperature, and other not yet clear, which I will need some logging to better understand. There are two sets of tables for the most part (and two branches of the logic) which I'm sure is the left and right OCVs.

Code:

   <scaling name="VVL_Test_1" units="units" toexpr="x*0.000030517578" frexpr="x/0.000030517578" format="%.2f" min="0" max="255" inc="1" storagetype="uint16" endian="big"/>

   <table name="Table_VVL_Related_Engine_Load_Delta" address="cb2ac" type="2D" level="1" scaling="VVL_Test_1">
      <table name="Engine Load" address="cb278" type="X Axis" elements="13" scaling="EngineLoad(g/rev)1"/>
   </table>

   <table name="Table_VVL_Related_Engine_Load_Delta_2" address="cb2fc" type="2D" level="1" scaling="VVL_Test_1">
      <table name="Engine Load" address="cb2c8" type="X Axis" elements="13" scaling="EngineLoad(g/rev)1"/>
   </table>

   <table name="Table_VVL_Related_OCV_Duty_1" address="cb344" type="2D" level="1" scaling="VVL_Test_1">
      <table name="OCV Duty" address="cb318" type="X Axis" elements="11" scaling="rawecuvalue"/>
   </table>

   <table name="Table_VVL_Related_OCV_Duty_2" address="cb388" type="2D" level="1" scaling="VVL_Test_1">
      <table name="OCV Duty" address="cb35c" type="X Axis" elements="11" scaling="rawecuvalue"/>
   </table>

   <table name="Table_VVL_Related_Accelerator_Angle_" address="cb3bc" type="2D" level="1" scaling="rawecuvalue">
      <table name="Engine Speed" address="cb3a0" type="X Axis" elements="7" scaling="RPM"/>
   </table>

   <table name="Table_VVL_Related_Accelerator_Angle_2" address="cb3f4" type="2D" level="1" scaling="rawecuvalue">
      <table name="Engine Speed" address="cb3d8" type="X Axis" elements="7" scaling="RPM"/>
   </table>

   <table name="VVL RPM Thresholds" address="cb258" type="2D" level="1" scaling="RPM">
      <table name="RPM thresholds" type="Static X Axis" elements="2">
         <data>VVL low mode below</data>
         <data>VVL high mode above</data>
      </table>
   </table> 

   <table name="VVL Accel Pedal Thresholds?" address="cb224" type="1D" level="1" scaling="rawecuvalue"/>

   <table name="VVL Accel Pedal Thresholds2?" address="cb228" type="1D" level="1" scaling="rawecuvalue"/>

   <table name="VVL Minimum RPM (High Mode)" address="cb24c" type="1D" level="1" scaling="RPM"/>

   <table name="VVL OCV Duty (High Mode Immediate)" address="cb1d4" type="1D" level="1" scaling="rawecuvalue"/>

   <table name="VVL OCV Duty (High Mode)" address="cb1cc" type="1D" level="1" scaling="rawecuvalue"/>

   <table name="VVL OCV Duty (Low Mode)" address="cb1c8" type="1D" level="1" scaling="rawecuvalue"/>

And it looks like this:

I'm not sure how the accelerator pedal related table and thresholds work - it's interesting, in that the result from the table (Rpm to Accel pedal) is added to the first threshold. I'm betting that it's an accelerator pedal angle delta required to switch to high mode lower that the 4000 RPM base threshold, as seen in the logs posted earlier. It would make sense that a very large accelerator pedal delta would be required to switch to high mode low down on the RPM scale, and decreasingly less so as you reach the floor threshold of 4000 RPMs. Why it's added to a another value, 10, I'm not sure... In effect it means that the very low RPMs can never achieve the switch over at 110%.

The engine load table and OCV duty table is an adder of some sort (same scale) - to what, I'm not yet sure.

td-d · **Posted:** Wed Sep 26, 2012 12:27 pm

If you want to test it, here's the revised ecuflash XML.

Please understand that this is about as Alpha / experimental as it gets!

throttlehappy · **Posted:** Wed Sep 26, 2012 7:04 pm

I knew about the Liberty had it but surprised the Forester might!

Doing some testing shortly!

throttlehappy · **Posted:** Wed Sep 26, 2012 10:13 pm

Looks like a possible 4000rpm VVL switch point on the 09 Forester 2.5i?

td-d · **Posted:** Thu Sep 27, 2012 1:38 am

throttlehappy wrote:

Looks like a possible 4000rpm VVL switch point on the 09 Forester 2.5i?

From the preliminary examination I've done, I think it's actually 3100 - 3200. There is a 3800 and 4000 threshold in the rom, but looks like its not related to AVLS.

I'll have a look at the specific rom above as well.

RomRaider

VVL thresholds / parameters / logic

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