Experimental and numerical analysis of a pre-chamber turbulent jet ignition combustion system
The growing demand for more efficient and less polluting internal combustion engine has pushed the development of non-conventional ignition systems. One of the most promising techniques appears to be the so-called Pre-Chamber initiated Turbulent Jet Ignition Combustion system in which a jet of hot combusting gasses is employed to initiate the combustion in the main chamber. In the present study, the combustion process related to this ignition system has been experimentally investigated in an optically accessible single cylinder Spark-Ignition engine. The pre-chamber was composed of a gas injector and a miniaturized spark-plug, embedded in a small annular chamber connected to the cylinder through a 4 holes pipette. A small amount of methane is injected within the pre-chamber for initiating the combustion. The flame reaches the combustion chamber through the four narrow orifices and rapidly consumes a homogeneous mixture of port injected gasoline and air.