| 摘要 |
A fuel injector and a control valve used in it are disclosed. The control valve comprises: a valve seat (1) defining a valve seating surface (3) and a fuel passage (2) extending through the valve seating surface (3), the fuel passage (2) being in communication with an injection valve of the fuel injector and forming a pressure releasing path which is provided for controlling the operation of the injection valve; and a valve element (4) moveable in a longitudinal direction and configured to cooperate with the valve seat (1) to open and close the fuel passage (2); wherein the fuel passage (2) comprises a first passage (2a) and a second passage (2b), both extending in the longitudinal direction, and an a turn-back passage (2d,2e,2f) continuously joined between the first (2a) and second (2b) passages. Erosion of the valve element (4) can be suppressed. |
