Wastegate mod.....

[avos at cochlear.com.au]

     My Subaru uses a similar 2D table to control the solenoid, but the 
     contents of the table are the actual soleniod pulse widths. This works 
     fine except that it is not closed loop, but I am proposing something 
     slightly different where control is still closed loop PID control, but 
     the set point for the PID controller is the contents of the table so 
     the set point changes with revs/throttle position, but the PID 
     controller still maintains accurate boost with good throttle 
     response....
     
     Adrian


______________________________ Reply Separator _________________________________
Subject: Re: Wastegate mod.....
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    17/10/97 11:02


avos at cochlear.com.au wrote:
     
>      incorporating a 2D table that contains set points as a funtion of revs 
>      and throttle position. 
     
Will the turbo respond quickly enough to the wastegate? It's definitely 
possible to control the wastegate with the 2D table, but even if the 
wastegate responds, how long would it take for the turbo to slow down or 
speed up as the wastegate opens and closes?
-- 
********************Skulte Performance Designs******************** 
Andris Skulte   askulte at tufts.edu   http://www.tufts.edu/~askulte 
(617)627-1601   89 IROC M5 305 TPI  best ET:13.994  best MPH:103.9
     
Leave late, drive faster, still get there first. ;)