SEALING SEAT OF A PRESSURE-COMPENSATED CONTROL VALVE OF A FUEL INJECTION VALVE

摘要

The present subject matter relates to a fuel injection valve for internal combustion engines. The fuel injection valve comprises a valve needle (4) that controls an opening of at least one injection opening (5) with its longitudinal movement. Further, a control chamber (17) is connected to a high-pressure storage (14). The control chamber (17) exerts a pressure at least indirectly on the valve needle (4). Moreover, the fuel injection valve has a control valve (23) having a valve seat (26) configured radially between a high-pressure valve chamber (22) connected to the control chamber (17) and a low-pressure valve chamber (24). The control valve (23) also has a control valve element (25) guided in an adjustable manner. The control valve element (25) radially delimits the high-pressure valve chamber (22) and acts together with the valve seat (26). The control valve element (25) has an annular projection (29) radially protruding into the high pressure valve chamber (22). Furthermore, the control valve element (25) has a projection surface (29a) of the projection (29) facing the valve seat (26) to form a sealing surface together with the valve seat (26).