Print Page - KFLDIMX and KFLDRL Questions

Hello Everyone,
I'm trying to get my head around the relationship between these two. I have read the FR where these are mentioned but ended up with more questions than answers.
Please correct me if I am wrong.

My understanding is KFLDIMX output(LDTVR_W) is the DC needed to produce certain amount of boost at a given RPM and requested boost(plsolr_w).
LDTVR_W is then input to KFLDRL together with RPM and output is "linearized" DC going to N75. The FR definition of linearize is:

Code:

In order to use the entire TV area (varying gradients), it is necessary to close the controlled system on the SW side
linearize so that a linear behavior results from the point of view of the controller.
This is achieved with the map KFLDRL, which applies a duty cycle coming in from the controller via an opposite one
Non-linearity transformed in such a way that the controlled system appears linear from the controller's point of view.

How does this actually work? My stock KFLDRL map is equal to LDTVR_W (x-axis). Meaning, 10=10, 20=20, etc. on all RPM range. Does that mean it does not utilize linearization?
Say my values on x-axis is 60 = 52 at all RPM, does it mean the N75 will aim for 52 DC when DMIX is requesting 60?

Apologies for the noob question but I'm just trying to understand how it works before I start tweaking it. I do have a general understanding how PID works but not specific to motronic. At first I thought the DIMX works like a feedforward but later learned that we don't have that. I don't understand the need for both maps to be tuned then if one overrides the other.

Quote from: prj on June 01, 2022, 12:43:26 AM

I recommend reading the sticky thread I made, and using KFLDRL as feedforward.

I was actually reading that thread and planning to apply that method once I get the idea of this whole system.

So DIMX being I and works as steady state, would DRL work like P D? So if I set it to say 60=55/3000rpm, it would go to 55 DC quickly then switch to I (dimx) for the remaining 5?

NefMoto

Noob Zone => Noob Questions => Topic started by: Cheekano on June 01, 2022, 12:35:43 AM