Digital Calculations of Engine Cycles is a collection of seven papers which were presented before technical meetings of the Society of Automotive Engineers during 1962 and 1963. The papers cover the spectrum of the subject of engine cycle events, ranging from an examination of composition and properties of the working fluid to simulation of the pressure-time events in the combustion chamber. The volume has been organized to present the material in a logical sequence. The first two chapters are concerned with the equilibrium states of the working fluid. These include the concentrations of various species of any significance that may appear at equilibrium in the combustion products, as well as the pressures and temperatures to be expected. This is followed by separate chapters on Mollier diagrams of the combustion products and the Otto cycle. The last two chapters focus on the synthesis of the spark ignition engine cycle from basic information on thermodynamics, heat transfer, and combustion. The results of the synthesis of these cycles are then compared to the actual cycle produced by an engine.