Mobility is changing — it’s electrifying. But not every vehicle is suited for electric propulsion and heavy battery systems. That’s where the rotary exhaust valve (REV) is revolutionary. The Advanced ...

GM has filed a patent application for a two-stroke engine valve system. The patent application is tagged with patent number US 2025/0354528 A1 and was filed with the United States Patent and Trademark ...

SAE Transactions, Vol. 101, Section 3: JOURNAL OF ENGINES (1992), pp. 1560-1570 (11 pages) The recent interest in two-stroke engines for automotive use has produced powerplants of such divergence that ...

Unless you're a motocross enthusiast, it's highly likely you haven't ben near a two-stroke engine in decades. While their mechanical simplicity, combined with an explosion on every complete revolution ...

Conventional wisdom suggests that our faithful internal combustion (IC) engines are heading the way of the buggy whip. The lithium-ion battery has arrived, emissions standards are tightening, and ...