Rotary Engine

Function

The idea of this engine is to substitute the strong acceleration and subsequent delay of the stroke piston with a steady rotary movement of the rotor, managing a higher rev and above all quietness with low vibrations.

How it works

An eccentric shaft guides a rotor with three edges and slightly outwardly arched flanks in a case such that every edge via a sealing strip has contact with the casing. On the top left in the case is the outlet port, on the bottom left the intake port and to the right there are one or two spark plugs arranged.

One rotation of the shaft causes only 1/3 rotation of the rotor. Case, rotor and eccentric shaft together provide for an increase or decrease of the space per rotation of the rotor. Additionally, one flank sucks in at the same time as the compression or ignition takes place in the next flank, and the third flank expels the exhaust gas. After his inventor the rotary piston engine is also called Wankel engine.

The figure shows the rotor with piston bowls, the water-cooled case with the channels and two spark plugs.

Disadvantage

There is a danger of bad sealing and wear in the sealing strips. Furthermore, the engine features a long stretched combustion chamber with high fuel consumption values and unfavourable exhaust gas emissions. 06/08