Patent ID: 7240669

Claim:
A method of operating a gaseous fuel internal combustion engine ( 1 ) having a cylinder bank ( 10 ) with at least one cylinder ( 8 ) a manifold ( 6 ) connected to each cylinder bank for conducting combustion air to each cylinder ( 8 ), a combustion air feed line ( 2 ) connected to the manifold ( 6 ) and a compressor ( 3 ) disposed in the combustion air feed line ( 2 ) for compressing the combustion air supplied to the engine ( 1 ), the method comprising the steps of introducing gaseous fuel from a gaseous fuel tank in an amount smaller than required for combustion with the combustion air in the internal combustion engine to the combustion air in the feed line ( 2 ) upstream of the compressor ( 3 ) for a thorough mixture in the compressor with the combustion air, and introducing an additional amount of fuel to the combustion air-gaseous fuel mixture downstream of the compressor ( 3 ) and upstream of the cylinders ( 8 ) of the internal combustion engine ( 1 ) the relative fuel amounts being determined as a function of the rotational speed of the compressor ( 3 ).