[wheela]

Okay guys, here's (hopefully) a basic question - can you please help me better understand how load(s) is calculated in these DME's? I've searched google, but haven't found any equations, or specific descriptions.

My current understanding of load is based on reviewing fueling and ignition tables on Mitsubishi ECU's (specifically 3g eclipses and EVO 7, 8, and 9). Since those tables are based on % load and rpm for the axes, I've assumed that load is just airflow expressed as a percentage of maximum airflow that the motor will consume at that rpm based on natural aspiration. So my naturally aspirated 3G had load up to 100% and the EVO's had load up to 170, or 220, or whatever (I can't remember), because the boost from the turbo could push airflow past the 100% point. So then for given RPM and %load (airflow) the ECU used the tables to determine what fueling and timing to use for that combination of %load (airflow) and rpm.

In the boost section of this thread, it's mentioned that some of the % load is also supplied by fueling, vanos, and ignition timing. What I'm not understanding, is how can fueling and ignition timing contribute to load, when fueling and ignition values are looked up from a table based on load (and rpm)? Is there some different kind of load? I can see how these would contribute to the torque value the DME calculates, but I'm not understanding how this fits my current understanding of what load is? Perhaps I'm not properly understanding what %load is in the first place?

I get that our DME's target a % load based on pedal inputs, and then make adjustments to throttle plate, vanos, valvetronic, etc. to try and hit the load target, and then continually adjust based on the actual load being achieved. But in MHD, it looks like there are at least two different loads that are measured against the load request %: "Load act. (%)" and "Load actual RAM". What are these two different loads?

Am I at least partially on the right track, or completely lost lol?