Fuel-injection valve with capillary channel - which prevents gas reaching metering point and forming deposits reducing cross=section

摘要

The injection valve has a collection cavity (48) downstream of the nozzle opening (45). At least one capillary channel (49,50,53) is located downstream of this cavity and its cross-section is such that the pressure drop in the channel is not greater than ten per cent of the pressure drop occurring at the metering point (46) and at the capillary channel. The capillary channel is inclined to the axis of the valve such that it is tangential to the chamber (51) following it. The collection cavity, the capillary channel and, if required, the following chamber (51) are located in a sleeve (26) that slides onto the valve.