| 摘要 |
PURPOSE:To enable the heightening of fuel injection pressure and the control of injection time, by providing an injection time controller, which moves a roller- guiding sliding cylinder perpendicularly to the axis of a fuel cam. CONSTITUTION:The centers O, O' of the outside and inside circumferential surfaces of a sliding cylinder 60 are eccentrically located so that when the sliding cylinder is turned by 180 deg. by moving a rack bar 602, the location of the centers O, O' is reversed in the right-to-left direction and the center O of motion of a sliding metal 8 is displaced leftward by two times of the distance between those O, O' of the sliding cylinder. As a result, a roller 9 is moved leftward on the sliding surface of a cam 10 so that the action start of the roller is delayed by an angle of alpha. As for a four-cycle engine, the fuel injection time can be delayed by 2alpha with regard to the angle of the crankshaft. If the centers O, O' of the sliding cylinder 60 are returned to the original positions, the fuel injection time can be advanced by 2alpha. According to this constitution, the fuel injection time can be appropriately set to achieve high performance over a wide range. |
