Fuel injector valve and nozzle for internal combustion engine has electromagnetic coil moving valve needle with spherical end engaging nozzle lining with thickened portions round nozzle bores

摘要

The electromagnetic coil moves a cylindrical valve needle (3) with a spherical end (4). The diameter of the end is greater than the diameter of the cylindrical valve shaft. The nozzle (5) has a shallow spherical depression (37) with a lining with thickened portions (38) round the nozzle bores (7) to act as seals when the nozzle valve is closed.