2 A FUEL VALVE AND METHOD FOR INJECTING A LIQUID FUEL INTO A COMBUSTION CHAMBER OF LARGE COMPRESSION-IGNITING TURBOCHARGED TWO-STROKE INTERNAL COMBUSTION ENGINE

摘要

A fuel valve 50 for injecting liquid fuel into the combustion chamber of a large low speed two stroke turbocharged compression ignition internal combustion engine comprises a elongated valve housing 52 having a rear end and a front end, A main bore 55 extending from the base 46 to the tip 59 closed and a plurality of nozzle holes 56 connected to the main bore 55. The main bore 55, And a base 51 disposed at the front end of the elongated valve housing 52 and having a nozzle 54 connected to the front end and a fuel inlet 54 in a elongated valve housing 52 for connection to a source of pressurized liquid fuel, A valve needle 61 slidably received in the longitudinal bore 77 in the elongated valve housing 52 and axially displaceable in a gap between the valve needle 61 and the needle bore 64, A valve needle 61 having a closed position and an open position, A valve needle 61 placed on the flange 69 and rising from the seat 69 in an open position and a valve needle 61 deflected toward the closed position, a fuel chamber 58 in the valve housing 52, A seat 69 disposed in the elongated valve housing 52 between the outlet ports 68 at the front end of the housing 52, an outlet port 68 directly connected to the main bore 55 in the nozzle 54, A fuel chamber 58 connected to the port 53, a clearance opening to the fuel chamber 58 at one end of the needle bore 64, a lubricant inlet port 78 for connection to a source 57 of pressurized lubricant, A lubricant supply conduit 76 for connecting the lubricant inlet port 70 to the gap at the first position Pl along the length of the needle bore 64 and an ignition fluid for connecting to the source of pressurized ignition fluid 65 Is closer to the fuel chamber 58 than the fuel chamber 58 or first position Pl from the inlet port 67 and the ignition liquid inlet port 67. [ It includes ignition fluid conduit (66) extending along the length of the needle bore (64) to the gap between the second position (P2).