3. Output shaft
The output shaft is a key component whose design is critical to the movement of the rotors within the housing during combustion. It is composed of circular lobes that are offset from the axis of the main shaft and fit into the rotor. These circular lobes convert the eccentric motion of the rotors through the pure rotational motion of the output shaft.
Working of a Wankel Engine
Every engine has a working medium, also known as combustible charge. A combustible charge consists of air and fuel mixed in a specific ratio to achieve optimal combustion. A Wankel engine operates on a thermodynamic cycle known as the Otto Cycle. This cycle has the following steps and can be understood in conjunction with the diagram below:
Assuming clockwise rotation of the rotor:
1. Intake (Drawing in of charge at atmospheric pressure)
As vertex 1 crosses the inlet port, while vertex 2 is still between the inlet and exhaust port, fresh combustible charge is drawn into the chamber.