Combustion Process in a Divided Chamber Spark Ignition Engine

Abstract

One of the promising engines may be a divided chamber spark ignition engine (a torch ignition engine) which can be operated with lean mixtures. In its chamber configuration, however, there are some components which affect the combustion process and the engine performance. Experiments were carried out with combustion chambers of various constructional parameters, and it was found that the combustion process was mainly affected by the character of the torch issueing from the prechamber. Among the parameters, dimensions of an orifice which divides the combustion space have an important effect on the combustion process. Because of the dominant effect of the torch, even a lean mixture can be rapidly burned.