Injection nozzle for liquids, particularly for fuels

Claim 1

An injection nozzle for liquids, said injection nozzle comprising a nozzle body having a discharge end, a cover plate opposing said nozzle body discharge end, said discharge end being configurated to define a central core having an end surface, said cover plate having an exhaust orifice therethrough in alignment with said core, said core end surface being of a greater size than said exhaust orifice and completely overlying said exhaust orifice, an annular recess in said nozzle body surrounding said core and together with said cover plate defining a spinning chamber, an inlet channel disposed outwardly of said spinning chamber, said inlet channel being defined by a recess in said nozzle body with said recess being closed by said cover plate, and spin channels extending from said inlet channel substantially tangentially into said spinning chamber immediately above said cover plate, said cover plate being permanently spaced from said core end surface and defining between said cover plate and said core end surface a narrow gap through which liquid being injected passes from said spinning chamber into said exhaust orifice, said spin channels discharging into said spinning chamber substantially at the level of said gap, and said gap having a flow section at the periphery of said core materially less than the cross section of said exhaust orifice.