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 ...

The rotary valve also means that the blockages caused by conventional poppet valves are not an issue as poppet valves are not needed in Alpha-Otto’s design. As the cylinder drops during combustion, ...

Rotary valve systems are not a new concept, having been used extensively in the 1970s in 2-stroke engine configurations. They were later dropped in favor of reed valves. We reached out to CEO and ...

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 ...

The valve comes with detents for manual operation with a knob or, alternatively, without detents for automatic operation with a servo or stepper motor. Nonselected ports vent to atmosphere. In an ...