Jump to content
Sign in to follow this  
David SR20VET

Boost control

Recommended Posts

Hi All

I'm in the process of setting up closed loop boost control and I've read on he forum that you need to set the Waste gate DC on the boost solenoid to 100% in open loop to determine the maximum boost pressure that can be achieve and then progressively build up your target boost pressure table and waste gate DC to achieve the boost pressure.

Yesterday I set the DC on the solenoid to 100% and the boost pressure achieved was 170 KPa absolute. This is fine as I can adjust the setup to achieve the 200KPa target I'm looking to achieve. My query is however that with the DC set to 20% I can achieve a higher boost pressure than at 100% which doesn't make sense as the maximum boost pressure that should be achieved is at a DC of 100% - Correct?

Can someone please provide some clarity on this.

Ive attached a log of both a 20% DC run and a 100% DC run for viewing.

Logs.rar

Share this post


Link to post
Share on other sites

Sounds like you have not plumbed your valve in properly, the valve normally bleeds air off to atmosphere from the waste-gate line, so 100% duty will always be max boost and 0% minimum.

 

There are other ways to do this but this method is the safest / easiest / most common.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...