Otto cycle


  • Webster's Revised Unabridged Dictionary
    • Otto cycle (Thermodynamics) A four-stroke cycle for internal-combustion engines consisting of the following operations: First stroke, suction into cylinder of explosive charge, as of gas and air; second stroke, compression, ignition, and explosion of this charge; third stroke (the working stroke), expansion of the gases; fourth stroke, expulsion of the products of combustion from the cylinder. This is the cycle invented by Beau de Rochas in 1862 and applied by Dr. Otto in 1877 in the Otto-Crossley gas engine, the first commercially successful internal-combustion engine made.
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In literature:

Brodie, too, had taught her to drive a motor car, and she could discourse learnedly on silencers and the Otto cycle.
"The Strange Case of Mortimer Fenley" by Louis Tracy
This series is called the Beau de Rochas, or Otto, cycle, and includes four movements of the piston.
"How it Works" by Archibald Williams
About 1900 the Gasmotoren Fabrik Deutz built an Otto cycle engine of 1000 b.h.p.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4" by Various
The cycle employed was patented in 1862 by Beau de Rochas (d. 1892), but was first successfully carried out by Otto (1876).
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2" by Various
Temps, a quatre Otto cycle.
"English-French and French-English dictionary of the motor car, cycle, and boat" by Frederick Lucas