Fuel injector for high-pressure accumulator injection system i.e. common rail, has servo-valve operatively generating hydraulic force in opening direction during opening process of injection-valve member

摘要

The injector (10) has an injector body (12) including a nozzle chamber (16) that is loaded with fuel under system pressure by a high-pressure pipeline (14). An actuator (26) includes actuating side coupling parts (32, 34), and an injection-valve member (18) is operated by mechanical transmission elements (46, 64). A servo-valve (38) operatively generates hydraulic force in an opening direction during an opening process of the injection-valve member.