Two-way needle control valve

摘要

A two-way needle (212) control valve for controlling the position of the needle of a needle valve in a fuel injector is disclosed. A poppet member (224) configured for displacement between an open position and a closed position in a valve bore (232) of a valve body. The valve bore (232) includes drain (254) for draining fuel from valve when valve is open. The valve includes a supply line (242) that extends across at least a portion of the valve body. The supply line receives fuel from a high pressure fuel line. An inlet throttle line (244) is in fluid communication with the supply line, and delivers fuel from the supply line to a control chamber in a throttle plate (246). An outlet throttle line delivers fuel from the control chamber (252) to a valve body inlet line, which is configured to deliver fuel to the cavity (258) in the valve bore (232).