Obravnava motorja z notranjim zgorevanjem in vbrizgavanjem plinskega goriva
A rapid-compression-machine study of gaseous fuel injection and combustion

english
slovenian

2004

volume 50, issue 1

Univerza v Ljubljani, Fakulteta za strojništvo

Rapid-compression-machine studies of an enginećs combustion system with the direct injection of gaseous fuel were made. The very short time available for the injection, combined with the poor penetration and mixing of the gas jet with the surrounding air, caused the serious problems with combustion initiation. One of the solutions to facilitate the ignition seems to be the use of a small ignition prechamber. The ignition takes place within the prechamber and the hot, chemically active combustion gases saturate the gaseous fuel jet that enters the main chamber where the mixing and combustion processes are continued. The results of the investigations aimed at obtaining an efficient and repetitive ignition of the gaseous fuel jet are presented. Various versions of the combustion chamber were investigated. The investigations were supported by the results of numerical calculations of the injection and mixing processes. We concluded that this type of combustion system has the potential to overcome the difficulties in achieving the repetitive ignition of the gaseous fuel jet.

16.09.2009