Some racing cars have aero features, such as a large inverted aerofoils, which can generate enormous (100s of kg) downforce, for eg acceleration and cornering.
Today’s invention is a wing which can use this downforce, when it’s not required for accelerations, to pressurise eg gas in a piston/cylinder.
This gas can then be used to supply extra pressure in eg oil supply, turbocharger or braking systems.