October 17, 2017

Autozone

Koenigsegg FreeValve

 

For more than a century, the internal combustion engine has relied on the ungainly camshaft. This spinning rod with variable lobes sits atop the engine, where it opens and closes intake and exhaust valves during the combustion cycle. But the camshaft has a limited range of motion, so its control over the valves is imprecise. This is the root of engine inefficiency. In April, Swedish supercar-maker Koenigsegg debuted the world’s first camless engine—the FreeValve—on a Chinese Qoros concept car. FreeValve forgoes the camshaft for electro-hydraulic-pneumatic actuators. They attach right to intake and exhaust valves, so engineers can control combustion within each cylinder. The design gets more power—imagine a four-cylinder getting 250 horsepower, sans turbo—and greater fuel economy out of otherwise standard engines. Cams, may you rest in peace.

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