Large two-stroke compression ignition internal combustion engine with fuel injection system for low flash point fuel and fuel valve thereof

摘要

A fuel valve for injecting a low flash point liquid fuel into a combustion chamber of a large two-stroke engine. A fuel valve includes a valve housing 52, a nozzle 54, a working fluid port 78 for connecting a fuel introduction port and a working fluid source for pressurized low flash point fuel, and a fuel valve 50 located in an open position in a vertical hole. A valve needle 61 that allows the flow of fuel from the fuel cavity 58 to the nozzle at one time, a pump piston connected to the working piston 83 and a working chamber 85 connected to the working fluid port, a fuel cavity and a fuel inlet port. And a pump chamber 82 connected to the pressure chamber, a sealing liquid introduction port 70 connected to a pressurized sealing liquid source, and sealing oil flow paths 93, 96, 97 connecting the sealing liquid introduction port to a vertical hole. An ignition liquid introducing port 92 connected to the ignition liquid source and the pump piston 80 in the first hole 81 are sealed, and a fixed amount of the ignition liquid is supplied to the pump chamber from the ignition liquid introducing port between the hole and the pump piston. An ignition liquid pipe 94 extending to the gap 91 is provided. [Selection diagram] Fig. 7