| 摘要 |
PURPOSE:To enable the injection timing, injection amount and injection pressure of fuel to be adjusted during the operation of an internal-combustion engine even if the engine is not stopped while eliminate any necessity for reinforcing a member and a joint because of tendency of fuel injection to a higher pressure. CONSTITUTION:A pump piston 18 of a fuel valve 3 is driven by a servo piston 17, while a pump chamber 33, restricted by an end face of the pump piston 18, is connected to an automatic injection nozzle 12 with a closing valve. The first pressure source 1 supplies fuel to the pump chamber 33 through a solenoid valve 7 and a throttle member 19, further equips a control valve 4 driven by a cam 67 with a timing control 5. The second pressure source 2 is connected to a servo pressure chamber 21 of the fuel valve 3 through the control valve 4, and the servo pressure chamber 21 is connected to a return flow pipe 76 in the first switching position of the control valve 4. While the second pressure source 2 is connected to the servo pressure chamber 21 in the second switching position. Here a charge period of the pump piston 18 can be controlled by the solenoid valve 7, and a charge speed can be restricted by the throttle member 19. |
