Internal combustion engine with injection of gaseous fuel

摘要

An internal combustion engine comprises a fuel injection nozzle disposed in a combustion chamber for injecting a gaseous fuel directly into the combustion chamber. An ignition device, also disposed within the combustion chamber, is installed in close proximity to the fuel injection nozzle. The ignition device comprises a sleeve that provides a shielded space around a hot surface igniter and the sleeve restricts flow between the shielded space and the combustion chamber. At least one inlet opening in the sleeve allows air and fuel to enter the shielded space to form a combustible mixture therein. The sleeve contains a substantial amount of the combustible mixture within the shielded space until it ignites and pressure builds within the shielded space to propel a combustion flame through at least one discharge opening and into contact with the fuel spray roots emerging from the fuel injection nozzle. The discharge opening(s) are oriented to direct the combustion flame in the direction of the fuel spray roots.