One-Dimensional Analysis of Combustion in a Spark-Ignition Engine

A theory based upon a concept of turbulent flame propagation has been developed and has resulted in the calculation of pressure versus crank angle and temperature versus both crank angle and chamber position as a function of various design parameters. Ultimately, the theory would result in the calculation of NO concentration. Turbulent mixing occurs to a significant extent throughout the chamber especially for larger turbulent eddy sizes. After burning is completed, the mixing tends to uniformize the temperature distribution somewhat.