Coupler mechanism for fuel injection valve, has two flexible seals, one facing compression spring area within receiving piston and balancing area, and other permitting relative axial motion between giving and receiving pistons

摘要

One of two flexible seals (8) interconnects and seals the giving piston (4) and receiving piston (5), while permitting relative axial motion between both pistons. The other seal (9) faces a compression spring area (11) within the receiving piston and a balancing area (7) connected to a coupler volume (6) between pistons.