This is more of a drivable helicopter than what most people imagine as a "flying car," but it's still pretty neat! Via Seeker:
Starting with the undercarriage, which PAL-V credits as their main breakthrough. The company was looking for a three-wheeled design that could still be stable when turning at normal road-going speeds. In 2005, they discovered the work of another Dutch company, Carver, which made 3-wheeled cars that tilted like motorcycles. A hydraulic tilting system like that could eliminate the need for a 4th wheel and also be useful to raise the whole vehicle up, giving it ground clearance for a rear-facing propeller. Then there was the matter of generating lift. Fixed wing aircraft need air to move over their wings fast enough to stay aloft, otherwise they'll stall. A fixed wing flying car has to compromise the size and shape of its wings in the name of practicality, meaning its risk of stalling is higher. So PAL-V chose a rotary wing design instead, but rather than make their flying car a helicopter, they decided it should be an autogyro.
Image: YouTube / Seeker