Fuel metering device with two integrated exit ports

The fuel doser, comprising an outer cylinder (22) with an inlet (220) and two outlets (222, 224) through which fuel is injected into a combustion chamber, an inner distribution cylinder (24) moved by a control member and dosing piston (26) with an annular recess (260) forming a distribution chamber, has the distribution cylinder made with a series of radial feed ports (248) to allow fuel into the distribution chamber from the inlet. The fuel is expelled from the chamber through one or more dosing orifices (252) of exponential section, separated by a seal (244) round the distribution cylinder, and through the outlets (222, 224).