Just kinda throwing this out there for discussion because I was thinking it would be cool if possible.  I haven't looked in detail yet at what exactly the OEM's are doing when they do the cylinder deactivation for increased fuel economy when cruising on the highway. Spark and fuel cut on the deactivated cylinders is obvious, but ME7 only has control over the injection time by banks (ti_b1 and ti_b2), not by cylinder, correct?  If that's right, then I guess the idea is shot down right there, not to even mention the difficulty to deal with the desired load/torque, maf readings, etc.

Anywho, just thought I'd spark the conversation.

Yeah, I was thinking about that. Not sure on a narrowband car, but on a wideband car maybe just halve the desired lambda to account for the 2x as much air?  Not sure.

What they said.

Just FYI, there is cylinder specific injection control.