Controlling Factors of Combustion in a D.I. Diesel Engine : Fundamental Factor in Controlled Combustion Period

Abstract

Using an ignition accelerator, some series of heat release progress for the variation in ignition timinng were collected and analyzed to clarify the influence of the burning characteristics of the rapid combustion period on the burning process of the succeeding combustion period of a quiescent chamber D.I. diesel engine. On the basis of clear correlations held between the values relating to the burning process, it was found that the mass of fuel injected in the period after the end of rapid combustion is the fundamental factor which controls the burning process in the controlled combustion period, and it governs such characteristic values of this period as the mass of the burnt fuel, the burnt proportion of fuel, and the burning speed. Discussions on the burning mechanism of the fuel spray are also given.