| 摘要 |
PURPOSE:To simplify the structure of a fuel injection valve to aim at reducing the cost thereof, by dividing a pressure chamber communicated with a compression chamber which is pressurized in association with the rotation of a pump, into two subpressure chambers with the use of a plunger fitted into the pressure chamber, and by enabling the amounts of fuel fed to both pressure subchambers to be controlled with the use of only one shut-off means. CONSTITUTION:An injection plunger 9 which defines a first pressure chamber 100 communicated with fuel suction passages 40 in the number equal to the number of engine cylinders and a compression chamber 100 between a pair of pressure feed plungers 5, and a second pressure chamber 11 to which suction fuel passages 19 in the number equal to the number of engine cylinders are opened, is slidably fitted in a shaft 1 in which the pair of pressure feed plungers 5 are disposed, being opposed diametrial to each other while the plungers 5 are cooperated with a roller ring 4. Further, a solenoid valve 15 as a shut-off means is disposed between fuel passages 16, 14 to which fuel at a pressure P1 is fed, and the fuel passage 14 is selectively communicated with either a control passage 13 (not shown) which is adapated to be communicated with the first pressure chamber 10 or the suction fuel passages 19. Further, this solenoid valve 15 controls the amount of fuel fed to the pressure chambers 10, 11. |
