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Otto cycle

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noun Thermodynamics.
  1. an idealization of the thermodynamic cycle of the internal combustion engine with air as the working substance: intake of air at atmospheric pressure, then adiabatic compression, then ignition with an increase of pressure and temperature at constant volume, then adiabatic expansion and performance of work, then a drop to atmospheric pressure at constant volume and a rejection of heat to the environment, then the exhaust of air at constant pressure.
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Origin of Otto cycle

1885–90; named after Nikolaus August Otto, 1832–91, German engineer and inventor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for otto cycle

Historical Examples

  • Practically all motor-cycle engines work on the "Otto-cycle" principle.

    The Romance of Modern Mechanism

    Archibald Williams

  • In the ordinary "Otto-cycle" motor an explosion occurs once in every two revolutions of the crank.


British Dictionary definitions for otto cycle

Otto cycle

noun
  1. an engine cycle used on four-stroke petrol engines (Otto engines) in which, ideally, combustion and rejection of heat both take place at constant volumeCompare diesel cycle
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Word Origin

C19: named after Nikolaus August Otto (1832–91), German engineer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012