| 摘要 |
PURPOSE:To securely control the EGR amount in relation to a load and simplify construction, by a method wherein the displacement of a mechanical operating mechanism such as a speed control lever is directly transmitted to an EGR valve as a displacement of a mechanical interlocking means such as a wire. CONSTITUTION:A controlling part body 5 of the EGR valve placed on a valve box 1 provided with a suction port 2 and a discharge port 3 in orthogonal directions is partitioned into upper and lower chambers 10, 11 by a diaphragm 7. The upper chamber 10 is so constructed that the negative pressure conducted into the chamber 10 through a pipe 23 can be regulated by a pressure-regulating mechanism comprising a valve device 14 provided in a partition part 6 fitted to the diaphragm 7. The valve device 14 is connected to a movable element 26 of a controlling mechanism 24 through a rod part 26a, and the movable element 26 is movably supported on a body 25 through a sealing member 29. One end of the wire 28 is connected to the element 26, and the other end is interlockedly connected to, for example, the speed control lever for a fuel injection pump. |
