The principle of Miller cycle is the same as Atkinson cycle, but it is called Miller cycle for patent reasons.

In fact, most people like to call Miller cycle Atkinson cycle.

Ordinary gasoline engine is Otto cycle, which has four strokes when working, namely intake stroke, compression stroke, power stroke and exhaust stroke.

Atkinson cycle is to make the working stroke greater than the compression stroke, and the expansion ratio of the engine greater than the compression ratio of the engine, which can improve the efficiency of the engine and reduce the fuel consumption of the engine.

Atkinson cycle engine can only be seen in some hybrid vehicles, and Atkinson cycle engine is rarely used in pure gasoline vehicles.

Atkinson cycle engine has insufficient power at low speed, which is very suitable for hybrid electric vehicles.

Hybrid electric vehicles can rely on electric motors to provide power when driving at low speed.

When the engine is at a low speed, the motor can also drive the wheels together with the engine, and the driver will not feel lack of power.

Mazda's blue sky technology uses Atkinson cycle, while Mazda's engine uses Atkinson cycle under certain working conditions, and does not use Atkinson cycle under certain working conditions.

If you are interested in Atkinson cycle, you can try the Atkinson cycle engine car.