So, to answer the question, do rotary engines have valves? Yes, they do ... have three power phases instead of just the one of a four-stroke engine. This, along with the way the rotor is mated ...

The four-stroke cycle of an automobile engine is detailed, highlighting the roles of intake, compression, power, and exhaust strokes. The film also introduces rotary engines, including steam ...

"There is no external oil being provided to lubricate the rotary valve, except through a 50:1 fuel oil mix used in two-stroke applications." Although this is a four-stroke engine, it needs this ...