Porsche has registered a patent for a hybrid powertrain combining compact and lightweight axial flux electric motors from supplier Yasa with an internal combustion engine.

The patent was registered with the World Intellectual Property Organization (WIPO). The document applies to any passenger car, but it specifically mentions application "in sports cars."

Instead of installing a relatively large radial flow electric motor in the PDK transmission case, as Porsche currently does in the 911 Carrera GTS, a thin axial flow disc motor will be located between the engine and transmission.

The axial flux motor (also known as a "disc motor") is an electric motor wherein the magnetic flux runs parallel to the rotational axis, unlike traditional radial motors where the flux is perpendicular to the axis. This allows for creating more compact, lighter, and efficient designs with high specific power and torque, especially at low speeds. 

The patent envisions the electric motor and internal combustion engine working together through a dual-clutch transmission. Due to the ultra-thin design of the electric motor (some modern models are just 7.9 centimeters thick), it will not increase the length of the entire powertrain.

It is claimed that this design contributes to less heat generation. Combined with a permeable chamber in the shape of a bowl or bell as described in the document, the electric motor and internal combustion engine should receive sufficient cooling. The main question: how much power can this hybrid system generate?

It is known that the most powerful Yasa units achieve outputs of over 470 hp and 800 Nm of torque. The hybrid Ferrari SF90 uses three Yasa motors with a total output of 217 hp, while the two Lamborghini Revuelto engines produce just under 296 hp. But both these systems work alongside large V8 and V12 engines.

If Porsche installs the new axial flow engine paired with a 3.6-liter turbo engine, the total output could exceed 800 hp.

Source: Carbuzz