Dual-fuel injector for IC engines of motor vehicles has hydraulic slide to connect either of two fuel supply channels to nozzle outlet

摘要

The injection has a nozzle body (1) with outlet (11) and two feed channels (13,23) for two fluids. A slide (21) located in a nozzle body chamber (20) is hydraulically actuated, so that dependent upon its position, it connects either the first or the second fluid supply channel to the nozzle outlet. The chamber is a ring chamber, the slide is formed as a ring-shaped piston, and separates the two fluids. There is an aperture or a gap (33) to return the first fluid, to scavenge the injector during or after operation of the slide. The first fluid is a fuel, and the second fluid is an additive or a fuel, which is injected during starting of an engine and/or during its warm-up period.