Fuel injection valve with a piezoelectric or magnetorestrictive actuator for a combustion engine has hydraulic coupling with flexible section having a restricted outer expansion

摘要

A fuel injection valve for a combustion engine with a piezoelectric or magnetorestrictive actuator comprises a valve body and seat and a hydraulic fluid coupling having two movable pistons (9,10) and a coupling volume connected by a throttle to an equalization space(12) in a flexible section (13) which is constrained by an outside contacting body (33).