E8 WB Closed loop PID settings?
 

Does anybody have a recommended proportional and intergral settings for a closed loop control on the E8.

No matter what I do it always pegs it to the max limit of reduction or addition. (mine is set to 10%)

I tried to set it up for two hours on the highway. My target a/f map is set. It should be relatively easy to set up. Before I upgraded to 1.89 it appeared to work properly. Also there is nothing wrong with my wideband hook up or operation of the wideband.

I basically set everything to 0 and just increased proportional until i see the it hit setpoint and oscilate. It never hit anything. At 100% proportional band it would just sit at 2% correction and not even make it close to the target setpoint. When I set the intergral to .10 it slowly would increase to 10% and sit there.

It appears as if it does not work at all. I was going to use the E8 for closed loop boost response but it doesn't appear to work at all in closed loop??

Anybody with the E8 V1.89 soft actually have a working closed loop?

Ian

P.S. Yup I am the one that was fighting with the autronic 500R/E8 install. it all works well know. 300km and counting.

Ok, Delete this thread. I am an idiot. When I upgraded to 1.89 I must have missed that it when from wideband a/d 2 to wideband into 02 input.

Anyhow when I get it tuned satisfactory I will post the settings.

thanks,
Ian

Rule of thumb for setting the PID's is first and foremost the Derivative is ALWAYS ZERO.

Then, bring the Proportional upwards in 5% increments until the AFR start to oscillate. Then start bringing up the Integral until the oscillation is canceled out. Usually the Integral will be approximately half of the Proportional.

FWIW I have had great luck with the default values.

Awesome. Played with it for a while. Sort of hard seeing the response on the wideband display. Maybe with some datalogging it will be easier. Either way it appeared to oscillate a bit regardless of settings. Probable due to my tune?

My settings were Proportional 30% and intergral .25%