Definition of otto cycle in English English dictionary
the basic thermodynamic cycle of the normal four-stroke internal combustion engine - isentropic compression, constant-volume heat addition, isentropic expansion, and constant-volume heat rejection
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