Limits of Flame Propagation in Two-Stroke Cycle Gasoline Engines

Abstract

In a two-stroke cycle gasoline engine, the limits of flame propagation were measured under various operating conditions, and the composition temperature and pressure of the cylinder gas at the limits were investigated. The adiabatic flame temperature in a lean or rich limit mixture was calculated on the basis of the cylinder gas state at the time of ignition. It is shown that, in the case where the engine speed and the ignition timing are fixed, the adiabatic flame temperature remains almost constant along both the lean and rich limits, regardless of the residual gas concentration or the mixture temperature.