COMBUSTION SYSTEM FOR GASEOUS FUELLED INTERNAL COMBUSTION ENGINE

摘要

Gaseous fuel injection pressures are normally less than liquid fuel injection pressures, resulting in reduced gaseous fuel jet momentum and mixing. A combustion system for an internal combustion engine comprises an intake port and valve, a cylinder and a piston that cooperate to provide a quiescent combustion chamber. The piston includes a re-entrant type piston bowl comprising an outer periphery and a protuberance emanating from the outer periphery. A fuel injector is configured to directly introduce a gaseous fuel into the combustion chamber and an ignition source is provided for igniting the gaseous fuel. A controller actuates the fuel injector such that a gaseous fuel jet is directed towards and splits upon impacting the protuberance forming first and second fuel plumes. The first fuel plume is redirected towards a first mixing zone adjacent a cylinder head and the second fuel plume redirected towards a second mixing zone adjacent the piston bowl.