Injector

摘要

A fuel injector comprises a valve needle (30) biased by a spring (58) towards a seating. The spring (58) engages a spring abutment member (48) which is moveable with a piston member (62). The spring abutment member (48) defines, with a member (46) carried by the needle (30), a damping chamber (50) which communicates through a restricted passage (54) with a low pressure drain to damp movement of the needle (30) relative to the piston member (62). <IMAGE>