Four-stroke engines, which make up 99% of vehicles on the road, rely on a system for managing air intake, compression, ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

That alone reduces emissions and increases engine longevity. The rotary valve also means that the blockages caused by conventional poppet valves are not an issue as poppet valves are not needed in ...

Rotary engines are compact, smooth, and powerful, so why don't more automakers use them? Well, it's complicated.

It is quite ironic that internal combustion engines (ICEs) have remained basically the same for more than one hundred years. It is only now – when they are allegedly on the verge of disappearing – ...

Far more than just adapting the rotary engine for use as a range extender, Mazda has essentially added variable cam timing to a camless engine. A lot of research was done over the years in attempts to ...

Ah, the Wankel rotary engine. The Dorito-spinning engine configuration is perhaps one of the coolest, and financially most terrifying, bits of automotive engineering. Best known for its appearance in ...

Li Qiao, a professor in Purdue University’s College of Engineering, is testing a Tesla valve-inspired design to improve the performance of rotating detonation engines. Purdue University photo. WEST ...

Pushrod engines are a product of the past, yet they still deliver major performance in cars like the C8 Corvette. So why aren ...