How rotary engines works

Hello everybody,

Today I will talk a bit about a kind of engine that almost nobody knows, the rotary engines (Wankel).

Like Diesel engine, the rotary engine carries the name of its inventor, Felix Wankel.

Rotary Engine

Unlike what we’re used to see in alternative engines, it has no cylinders or pistons … It works with eccentric rotors that rotate and give rise to the famous four times a combustion engine.

On admission to the rotor turns pulling the air / fuel mix, continue turning until compress the mixture  against the walls of the engine, in these walls we will have the spark and ignition process.

After ignition, the expansion occurs and the next time they find the exit to escape.

4 times of a rotary engine

This type of engine is not much used due to the high friction between the rotor and the walls of the engine’s body, currently only some Mazdas use it (the most famous are  Rx-7 and RX-8).

Mazda Rx-8

Despite this disadvantage, there are many advantages in relation to default engines we see in cars today:

1)  Higher ratio hp / liter, Mazda RX-8 for example, can generate incredible 247hp with a 1.3 rotary engine.

2) Requires a lot less moving parts, including for example the camshaft. 

3) There is no alternative movement (who works with mechanics know what that means…).

4) The engine is more compact.

Then I’m posting two videos showing the operation of the rotary engine. Hope you enjoy.

This first show in a more mechanical;

This is a small illustration of the operation, with a touch of animation … 

This was the post about rotary engines, I hope you enjoyed it.

Rafael Basilio

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