Connection to feed fuel and water into injection valve in Diesel internal combustion engine

摘要

A connecting element 4 has a first inlet 2 for a fuel line and a second inlet 3 for a second fluid, preferably water, the first inlet 2 leading to a flow passage 5 which is surrounded by an annular space 31 into which the second fluid is discharged and nozzle bores at the periphery of the flow passage 5 connecting the annular space 31 with the flow passage 5; the nozzle bores being arranged at an acute angle to an axis coaxial to the flow direction of the fuel in the fuel passage 5. The outlet 12 of the flow passage 5 may be directly attached to a fuel injection nozzle 1. Preferably a nozzle insert 18 is placed in the flow passage 5 separating the annular gap 31 from the flow passage 5 and through which the nozzles bores pass. The nozzle bores may co-operate with grooves in the flow passage 5 to increase turbulence and assist the emulsifying effect. The fuel-water ratio is a function of engine operating conditions.