Mazda may have found the apex in ICE design with the Skyactiv-Z

bob1029

> No turbocharger is used, but a small Roots-type supercharger expands the compression ignition window by adding more air to the engine to allow leaner fuel mixes – especially at higher speeds where avoiding knock is more problematic. This is a surprising engineering decision considering the efficiency goals. I'd be curious to see how they managed to offset the parasitic losses. In a hellcat engine, the supercharger consumes anywhere from 10 to 100hp depending on engine load. You can never turn it off.

fxtentacle

“the apex of internal combustion engines means they’re doing more than just propelling a vehicle around roads and highways. They’d also be air purifiers, removing CO2 as they go.” which sounds amazing, but is followed by 0 facts or information on how that might work.