Ferrari applied for a patent for a four-cylinder engine with regenerative exhaust energy from an electric compressor.

The following picture is taken from this patent. It looks complicated, but it basically shows a four-cylinder engine and an exhaust-driven turbine. It does not rotate the compressor like the traditional turbocharger, but rotates the generator, similar to the MGU-H system used in f 1. The compressor used to rotate the air intake sends more air into the engine, thus generating more power.

This system has another advantage. The patent says that the exhaust turbine can be used to change the sound of the engine. Basically, as more exhaust gas escapes, the faster the turbine rotates, the louder the sound. According to this patent, the speed of the turbine can be controlled by changing the regeneration intensity of the connected generator, which is similar to some electric vehicles that let you change the intensity of their braking energy regeneration system.

Ferrari, like other car manufacturers, is facing increasing environmental pressure, but can we really see a car with a four-cylinder engine? It seems strange, but the company will equip its fleet with SUVs in a few years.

However, such a power system is more likely to appear in Alfa Romeo or Maserati, and its engine comes from the prancing horse. Maybe it's just that Ferrari only applied for a patent to protect the design.