Patent ID: 6953030

Claim:
A method for fuel injection in an engine of piston-and-cylinder type with compression ignition, comprising: supplying inlet air into a combustion chamber of an engine cylinder; supplying a quantity of fuel to the combustion chamber in the engine cylinder, and driving each working cycle of the engine with air and the quantity of fuel in the combustion chamber, and producing hot EGR gases in the combustion chamber during the working cycle; feeding the hot EGR gases back to the combustion chamber; combining at least a first portion of the quantity of fuel with at least a first portion of the hot EGR gases before the combined quantity of fuel and EGR gases are mixed with the inlet air; supplying the quantity of fuel includes supplying the combined first portion of the quantity of fuel and the first portion of the EGR gases to the combustion chamber; and cooling a second portion of the hot EGR gases; and passing the cooled second portion of the EGR gases to the combustion chamber.