| 摘要 |
PURPOSE:To stabilize the feul injection quantity by installing a driving means for moving a plunger in reciprocation and a coil spring wound in the reverse direction in the inclination direction of an inclined groove for urging the plunger towards the driving means. CONSTITUTION:A plunger 4 having an inclined groove 44 inclined to one edge side and a coil spring 6 which is wound in the reverse direction in the inclination direction of the inclined groove 44 are assembled. Therefore, the fuel pressure in a cylinder 3 lowers, and the force due to the pressure waves and the reaction force of the coil spring 6 are offset each other when a hole 23 is opened and closed when the coil spring 6 returns to an extension position from a contraction position, and the plunger 4 is pressed only in the direction for increasing the injection quantity of fuel. Therefore, the dispersion of the injection quantity of fuel due to the revolution or non-revolution of the plunger 4 in the direction for reducing the injection quantity of the fuel is suppressed, and the fuel injection quantity can be stabilized. |
