| 摘要 |
PURPOSE:To make the injection rate that corresponds to an operation state in an engine controllable with a simple structure, by installing a plunger, a regulating valve regulating operation of the plunger and a select device selecting and operating this regulating valve altogether. CONSTITUTION:At a time when an engine is in a state of being high speed and high load, pump chamber pressure Pt to be fed to a pump chamber pressure leading port 12a comes into a state of being cut off by an external select device whereby the pump chamber pressure Pt will not be fed to a pressure chamber 21. Therefore, a spool 19 moves in a right direction and as a result, an oil chamber 37 and a sleeve 17 or a leak passage 26 are interconnected with each other. Accordingly, receiving the pressure of fuel oil, a needle valve 34 lifts up whereby the upper end surface of a pressure pin 35 comes into contact with the lower end surface of a plunger 29 and further pushes this lower end surface upward but the oil chamber 37 is interconnected to the leak passage 26 so that the plunger 29 is lifted up to the maximum extent. |
