To get to them, the company teamed with Porsche to build a liquid-cooled engine.

FORBES: Love into Money

By the early 20th century Syracuse became famous for production of Smith Corona typewriters, Syracuse China, Nettleton shoes, bicycles, wax candles and the Franklin, an ahead-of-its-time automobile with an air-cooled engine.

FORBES: Willis Carrier's Ghost

One is exhaust gas recirculation, which pumps cooled exhaust back into the engine air intake, lowering the combustion temperature and reducing NOx formation.

FORBES: Clearing the Air

The maps of these days, superimposed, would have made a tangle, but every morning he emerged from the same place, just as the sun came up, and every evening he returned there, tired now, darkened, switching off the bike, rolling it over the wooden threshold of the door leading into the courtyard, the engine ticking as it cooled.

NEWYORKER: Nawabdin Electrician

This new Harley has a liquid-cooled V-twin 1, 130cc engine, developed with Porsche, that runs at 115hp.

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This Lexus Hybrid Drive powertrain features an all-new, ultra-smooth running, 2.5 litre 4-cylinder petrol engine mated to a compact, high-output, water-cooled permanent magnet electric motor.

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