Introduction-

UNIT – I
GAS POWER CYCLES
Syllabus
Otto, Diesel, Dual, Brayton cycles, Calculation of mean effective pressure, and air standard efficiency –Actual and theoretical PV diagram of four stroke and two stroke engines




The Otto Cycle The Otto cycle, which was first proposed by a Frenchman, Beau de Rochas in 1862, was first used on an engine built by a German, Nicholas A. Otto, in 1876. The cycle is also called a constant volume or explosion cycle. This is the equivalent air cycle for reciprocating piston engines using spark ignition. Figures 1 and 2 show the P-V and T-s diagrams respectively.

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