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Argonne

Argonne Fuel Injector Flower

The nozzle of the fuel injector in a car sprays gasoline through tiny holes, designed to make as fine a mist as possible so the fuel burns better. Researchers at Argonne National Lab, attempting to make the engine even more efficient, reduced the size of the holes to less than the size of a single human hair. This image, by Argonne’s Nicholaos Demas, shows a nozzle with eight holes—polished from the tip down to reveal a flower-like pattern—seen under a microscope. The yellow area is the iron nozzle, the black areas are epoxy used to hold the nozzle, and the petals are the nickel-phosphorous material used to reduce the size of the holes.

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