Taking its cue from Las Vegas, where casinos pump extra oxygen into the air
to keep gamblers awake at the roulette wheels, Toyota is patenting a system that
helps to prevent drivers falling asleep at the wheel (EP 773 188).
Air from outside is sucked into a cylinder that contains a magnetic field.
Oxygen is paramagnetic, so it moves in line with the field and through outlets
into the car. Nitrogen is diamagnetic and remains at the centre of the cylinder
where it is released back into the atmosphere.
