FUEL VALVE FOR INJECTION OF LIQUID FUEL INTO THE COMBUSTION CHAMBER OF A TWO-STROKE INTERNAL COMBUSTION ENGINE WITH TURBOCHARGER AND SELF-IGNITION AND REMOVER

摘要

A fuel valve (50) for injecting e.g. a low flashpoint liquid fuel into the combustion chamber of a large slow running two-stroke turbocharged self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52), a nozzle (54) with a closed tip (59) and a hollow interior that forms a chamber (55) connected to nozzle holes (56), a fuel inlet port (53) for connection to a source (60) of pressurized liquid fuel, an actuation liquid port (92), a pump piston (80) received in a first bore (81) with a pump chamber (82) in the first bore (81) on one side of the pump piston (80), an actuation piston (83) received in a second bore (84) in the valve housing (52) with an actuation chamber (85) in the second bore (84) on one side of the actuation piston (83), the pump piston (80) being connected to the actuation piston (83) to move in unison therewith, the actuation chamber (85) being connected to the actuation liquid port (92), a valve member with an axially displaceable shaft (67) that is received in a longitudinal bore (77), the valve member having a closed position and an open position, the axially displaceable shaft (67) is provided with a closure member (65) that rests on a valve seat (69) in the closed position and has lift from the valve seat (69) in the open position and the axially displaceable shaft (67) is biased towards the closed position by a spring (66), a conduit (57, 77) between the pump chamber (82) and the valve seat (69), the valve seat faces the chamber (55) in the nozzle (54), and the closure member (65) is at least partially disposed in the chamber (55) in the nozzle (54).