There's an interesting bit of history behind the Chrysler 2.4 Tigershark engine. Chrysler established the Global Engine Manufacturing Alliance (GEMA) with Hyundai and Mitsubishi in 2002, a partnership ...
The defining characteristic of a two-stroke engine is to fire (combust) every time the piston is at top dead center. This makes them highly power dense, but also notoriously makes two-stroke engines ...
It looks like GM is working on modernising two-stroke engines by tackling their emissions problem. This could open a whole new chapter for internal combustion.