With much leaner charge, exhaust emissions should meet standards.
“The engine will function like a traditional gas engine at low revs, using spark plugs to ignite the air-fuel mixture in the combustion chamber. At higher revs, though, the plugs will deactivate and the gas will ignite under piston compression alone.”
Sounds pretty complex and a lot that could go wrong. I sure would not get Gen 1 but a lot of good potential. Reminds of the V8/6/4 idea Cadillac offered BRIEFLY.