Dosage arrangement in common-rail fuel injector of diesel engine

摘要

The dosage arrangement includes an electro-mechanical actuator for controlling an aperture process, and at least one resonant and loss-affected structure in an area of its surface for a noise reduction. The structure includes preferably at least one Helmholtz resonator (8, 81, 82) which is a multiple resonator, especially a dual resonator with at least two overlapping resonance curves. The resonator is embedded at a free surface or at a cover (6) of the dosage arrangement.