| 主权项 |
1. An injection nozzle for use in injecting lubricating oil into cylinders in large engines and adapted with mounting means for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with at least one nozzle outlet at the inner end of the nozzle rod, the nozzle rod including a valve with a cylindrical valve seat boring in which is provided a displaceable valve body having a cylindrical sealing surface which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body having an enlarged head at its outer end with a contact face for a spring disposed around the valve body for establishing a spring-loaded closing of the valve, the nozzle rod including a passage for pressurised oil for supplying pressurised oil to a pressure chamber in which the pressurised oil can exert a force on the valve body so that it is displaced against the action of the spring for opening the valve and establishing an overpressure injection of oil through the nozzle outlet until the oil pressure drops such that the spring establishes an efficient closing of the valve, wherein the valve body is formed by a cylindrical rod which has a turned recess in the cylindrical sealing face of the valve body, that the turned recess is arranged at the inner end of the valve body, with parts of the cylindrical sealing face of the valve body at each their side of the turned recess, for being connected with the nozzle outlet at the forward displacement of the valve body against the action of the spring, that the pressure chamber of the nozzle rod is formed by a pressure chamber boring with greater diameter than the valve seat boring for forming a pressure chamber in which the spring is located, and that the pressure chamber via a pressurised oil supply duct is connected with the turned recess in the valve body. |
