Fuel return circuit for fuel injecting device in internal combustion engine, has closure pipe made of deformable material and provided in parallel to part of collecting pipe length so that pressure waves are returned to downstream portion

摘要

The circuit (3) has a leakage collecting pipe (11) whose downstream and upstream ends are connected to downstream and upstream end injectors (7a, 7d) by downstream and upstream end branches (11a, 11d), respectively, such that fuel expelled through leakage outlets (F) is flown through the downstream end of the pipe (11) towards a fuel reservoir (5). A closure pipe (20) made of deformable material is arranged in parallel to a part of length of the pipe (11) such that pressure waves propagated from downstream to upstream of the pipe (11), are returned to a downstream portion of the pipe (11). An independent claim is also included for a fuel injecting device for an internal combustion engine, comprising a fuel return circuit.