Fuel injection valve, especially for direct fuel injection into combustion engine combustion chamber, has at least partly elastic sealing section, coupler section subject to force directed away from respective other coupler section

摘要

The fuel injection valve (1) has a piezoelectric, electrostrictive or magnetostrictive actuator (2) and a valve closure body (7) that interacts with the actuator and with a valve seat surface and a coupler (4) with first and second sections (23,24) that are mutually relatively axially movable and interact via a hydraulic medium in a hydraulic volume (36) sealed by at least one first flexible section (27,28), which is at least partly elastic. At least one of the coupler sections is subjected to a force directed away from the respective other coupler section.