FUEL VALVE FOR INJECTING FUEL OF LOW FLASH POINT TO COMBUSTION CHAMBER OF TURBOCHARGING TYPE LARGE-SIZED TWO-STROKE SELF-IGNITION INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel valve for injecting a low flash point fuel to a combustion chamber of a turbocharging type large-sized low-speed uniflow two-stroke internal combustion engine.SOLUTION: A fuel valve 50 includes a long fuel valve housing 52, a nozzle 54 disposed on a front end of the valve housing, a fuel inlet port 53, a working fluid port 78, and a valve needle 61 slidably received in a longitudinal needle cavity 64, axially displaceable, and having a close position and an open position. The fuel valve further has a combustion chamber 58 surrounding the valve needle and opened to a valve seat 69, a pump piston having a pump chamber 82 of the first cavity at one side received in the first cavity 81, and an operation piston 83 having an operation chamber 85 of a second cavity at one side received in the second cavity 84. The fuel valve has an outlet connected to the pump chamber and the combustion chamber, and an inlet connected to the fuel inlet port through a check valve 74 of the long fuel valve housing for preventing flow from the pump chamber to the fuel inlet port 53.SELECTED DRAWING: Figure 7