| 摘要 |
PURPOSE:To improve the regulation accuracy through simple structure by communicating/interrupting between the intake/cutoff port and the fuel intake path through a solenoid valve while controlling the open-valve time to control the injection and detecting the displacement of piston electrically. CONSTITUTION:When a plunger 12 is at the upper limit, intermediate or the lower limit position, an intake/cutoff port 19 will communicate/choke with an annular groove 14 and communicate with annular groove 15. Under the condition where a cam 25 has functioned to hole the port 19 at the full-close position by means of the plunger 12, a solenoid valve 30 is opened for predetermined time through a drive signal fed from an electronic controller to flow such volume of fuel as proportional with the open-valve time through a fuel suction path 29, the port 19, a communication hole 44 and a through-hole 43 into the pressure flow-in chamber 42 of an ejection volume detector 36 where the flow is the sum of the volume Q proportional with the open-valve time of the solenoid valve 30 and the counterflow E through a nozzle 3 while the ejection volume Q is detected electrically on the basis of the displacement of piston 39 thus to control the open- valve time of the solenoid valve 30 through the control signal fed from the electronic controller. |
