2 A LARGE TWO-STROKE COMPRESSION-IGNITED INTERNAL COMBUSTION ENGINE WITH FUEL INJECTION SYSTEM FOR A LOW FLASHPOINT FUEL AND A FUEL VALVE THEREFORE

摘要

A fuel valve (50) that injects low flash point liquid fuel into the combustion chamber of a large two-stroke engine. The fuel valve 50 includes a valve housing 52, a nozzle 54, a fuel inlet port 76 connecting to a source of pressurized low flash point fuel, a working fluid port 78 connecting to a working fluid source, and a valve needle ( Pump piston connected to valve needle 61, working piston 83 in the longitudinal bore of fuel valve 50 allowing flow of fuel from fuel cavity 58 to nozzle 54 when 61 is in the open position 80, working chamber 85 connected to working fluid port 78, pump chamber 82 fluidly connected to fuel cavity 58 and fluidly connected to fuel inlet port 76, pressurized sealed liquid source Ps Sealing liquid inlet port (70) connecting to, sealing liquid inlet port (70) connecting sealing liquid inlet port (70) to the longitudinal bore, ignition connecting to pressurized ignition liquid supply source (Pi) Liquid inlet port 92, first bore 81 from ignition liquid inlet port 92 to seal pump piston 80 within first bore 81 and to deliver a constant amount of ignition liquid to pump chamber 82 ) And the ignition liquid conduit 94 extending into the gap 91 between the pump piston 80.