Fuel injecting valve for internal combustion engine, has valve needle controlled by control valve, and control boreholes coupled with low pressure/return system by control valve, where one of control boreholes is guided into control chamber

摘要

The injecting valve has a nozzle body (2) in which a valve needle (5) with a guide section is guided into a guide borehole in an axially movable manner, where the valve needle is controlled by a control valve (4). A pressure surface (81) forms a larger surface as a shoot surface so that an opening force is produced in the valve needle by a system pressure lying in the pressure surface. Control boreholes (341, 351) are connected with a low pressure/return system by the control valve, where the control borehole (351) is guided into a control chamber (30).