How have engineers at the Ford Motor Company improved the fuel efficiency of a prototype car?
A. Doping its fuel with a trace of the heavy metal bismuth B. Building engine parts out of lightweight lithium C. Putting a big flashing sign on the dashboard that says \Slow Down!\ D. Giving the engine a shot of alcohol, but only when it really needs one
Giving the engine a shot of alcohol, but only when it really needs one
Driving and alcohol dont usually mix, but giving a petrol engine an occasional slug of the hard stuff could make it as fuel-efficient as a petrol-electric hybrid.
Called a direct-injection ethanol engine, the unit runs primarily on petrol.
When it needs to deliver maximum power - to climb a hill or overtake, for example - the engine managementcomputer adds a little ethanol to the fuel injected into the combustion chambers.
See Alcohol makes autos more climate-friendly