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IRIS engine
The IRIS Engine is a design for a new type of internal combustion engine. Its inventors say that engines constructed using this design can be smaller, lighter and significantly more efficient than traditional engines of comparable horsepower and displacement. The design replaces the piston and cylinder architecture of conventional engines with a purportedly novel mechanism called the Internally Radiating Impulse Structure, or IRIS.〔()〕
In January 2008, the IRIS Engine design won first prize for transportation technology in NASA's annual "Create the Future" design competition.〔〔(NASA Tech Briefs Create the Future Design Contest )〕 In October 2008, the Radial Expansion Engine (RXE), a variant of the IRIS design, won a major award in the ConocoPhillips Energy Prize competition.〔(Bot generated title --> )〕
==Geometry of the IRIS==
In an IRIS combustion chamber, a number of inverted segments of a circle, or "chordons," interact to create a continuously sealed chamber of variable volume. Instead of elongating during combustion, as a traditional engine does, the IRIS engine's chamber expands in diameter. The inventors claim that this innovation will reduce waste heat and will increase the amount of surface area the engine has available to produce torque.〔(Tendix Development | The IRIS Engine: A Breakthrough in Energy Efficiency )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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