| 摘要 |
A fuel injector for an engine having at least one combustion chamber is disclosed. The fuel injector has a needle valve element with a base end and a tip end. The tip end of the fuel injector has a valve sealing surface. The fuel injector also has a control chamber located at the base end of the needle valve element, and a nozzle member. The nozzle member has a central bore configured to slidingly receive the needle valve element, and a valve seating surface configured for engagement with the valve sealing surface of the needle valve element. The nozzle member also has at least one radially disposed injection orifice and an annular groove located within the valve seating surface. The injection orifice is configured to communicate the central bore with the at least one combustion chamber.
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