free-piston engine

free-piston engine

[′frē ‚pis·tən ′en·jən]
(mechanical engineering)
A prime mover utilizing free-piston motion controlled by gas pressure in the cylinders.
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References in periodicals archive ?
An example of this is Sturman Industries' ADAPT system, which combines electronic fuel delivery, VVA air control, air-injection emission control, and a digital-hydraulic approach to a free-piston engine.
developer of the long-stroke free-piston engine and Sprague gear transmission that are licensed to Green Well Power the world's leading company in oil and gas / geothermal co-production, which recently signed a multi-million dollar project financing deal with Free Green Energy of Houston for the conversion of 200 end-of-life oil and gas wells into long-life electrical power generators expected to cost $280 million.
The company designs and builds a proprietary line of long-stoke, free-piston engines and permanent magnet linear alternators.