RUN a car engine for half an hour, and 80 per cent of its hydrocarbon
emissions will be spewed out in the first two minutes, while it’s still cold.
But American researchers have found a way to make an engine behave as if it’s
warmed up all along, reducing pollution from the moment you turn the ignition
key.
Their secret? To keep a proportion of the car’s most volatile fuel to one
side and use it for the engine’s starting phase.
Car engines can only burn petrol once it has been vaporised. But much of the
fuel drawn into a…
