Pneumatic valve springs are metal bellows filled with compressed air used as an alternative to the metal wire springs used to close valves in high-speed internal combustion engines. This system was introduced in the mid-1980s in Renault turbocharged 1.5 litre Formula One engines.
Read more about Pneumatic Valve Springs: Concept, Pneumatic Valve Technology in Racing, Future Valve Technology
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—T.S. (Thomas Stearns)
“If you would get exercise, go in search of the springs of life.”
—Henry David Thoreau (1817–1862)