Wastegate Map

Developer topics relating to software that provides a tuning UI to alter ECU code and data

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Wastegate Map

Postby intrawrx » Sat Mar 18, 2006 7:01 am

Hi

I am currently trying to workout a way to calculate the wastegate throttle percentage on a 2D map. Would anyone have a forumla that works in big endian or the a way to find out the maximum throttle value?

I am currently using the formula : [value]*100/169

When i display up the wastegate section i get the following.

Anyone able to steer me in the right direction?
Attachments
wastegatebe.jpg
Image Capture of wastegate load issues
wastegatebe.jpg (53.65 KiB) Viewed 5063 times
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Postby cboles » Sat Mar 18, 2006 7:26 am

Here are the relevant scalings from the new EcuFlash - just substitute [value] for x, and I think it should work.

Colby

Code: Select all
      <scaling name="RPM" units="RPM" toexpr="x*50/256" frexpr="x*256/50" format="%.0f" min="0" max="9000" storagetype="uint16" endian="big"/>
   <scaling name="Throttle" units="%" toexpr="x*100/43516" frexpr="43516/100/x" format="%.2f" min="0" max="100" storagetype="uint16" endian="big"/>
   <scaling name="WGDuty" units="%" toexpr="x*100/246" frexpr="246/100/x" format="%.2f" min="0" max="100" storagetype="uint8"/>
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Postby intrawrx » Sat Mar 18, 2006 6:04 pm

Colby,

You are a champ!

All nice and neat now :)

I have noticed that a few people have marked out their "Target boost" maps with "BAR targets" , if i change it to "PSI" it seems to look a little more correct.

What would be your guys opinion on this?
Attachments
targetboostbar.jpg
Boost Target in BAR
targetboostbar.jpg (86.76 KiB) Viewed 5026 times
targetboostsi.jpg
Target Boost in PSI
targetboostsi.jpg (88.68 KiB) Viewed 5024 times
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Postby Jeramie » Mon Mar 20, 2006 5:52 am

Subscribe
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Postby mrtMY03Aust » Sun Apr 16, 2006 5:48 am

The BAR target's are in absolute pressure?

(ie, including the 1 atmo?)

Just a thought.
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Postby FrSTi » Thu Apr 20, 2006 12:21 pm

mrtMY03Aust wrote:The BAR target's are in absolute pressure?

(ie, including the 1 atmo?)

Just a thought.


They are.
They include the atmo, not necessary @ 1 ;)
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