The Wankel engine is a type of internal combustion engine using an eccentric rotary design to convert pressure into rotating motion. ... In one revolution, the rotor experiences power pulses and exhausts gas simultaneously, while the four stages of the Otto cycle occur at separate times.

Why are Wankel engines not used?

The Wankel engine was last seen in a production car in the Mazda RX-8, and currently there are no rotary engines in production. ... They also have problems with rotor sealing as a result of uneven temperatures in the combustion chamber since combustion only occurs in one portion of the engine.

Why do rotary engines burn oil?

By design, Wankel rotary engines burn oil. The consumed oil helps lubricate the engine and ensure that it isn't damaged. This oil consumption also adds to the fuel economy and emissions issues that the design already has.