| 摘要 |
A fuel injector comprises a pressurization section defining a variable-volume pressurization chamber. A nozzle section has a longitudinal bore, a nozzle chamber, an orifice and a nozzle valve. The nozzle valve is slides in the longitudinal bore between a first position that blocks fluid communication between the nozzle chamber and the orifice, and a second position that opens fluid communication between the nozzle chamber and the orifice. A check valve is between the pressurization chamber and the nozzle chamber. The check valve comprises a housing comprising an upper portion, a lower portion and a middle portion. The housing defines a check valve chamber. A valve member in the check valve chamber hydro-pneumatically moves between an open position that allows fluid communication from the pressurization chamber to the nozzle chamber and a closed position that prevents fluid communication from the nozzle chamber to the pressurization chamber. |
