| 摘要 |
PURPOSE:To control the quantity of intake air supplied to a diesel engine appropriately, by controlling an air valve adapted for controlling the flow rate of intake air by way of feedback control of a signal indicating partial vacuum in the intake pipe. CONSTITUTION:An air valve 3 and a piston type throttle valve 4 are provided in suction pipe 1. Further, there is provided a diaphragm means 26a to which suction vacuum between these two valves 3, 4 is transmitted. The diaphragm means 26a is connected, by means of lever 28, to a pilot valve 30 into which fuel in fuel tank 18 is furnished by pump 19. Through the movement of spool valve 36 in the pilot valve 30, fuel is supplied into cylinder chamber 41 and pressure is acted to piston 40. Opening of air valve 3 is changed with the movement of piston 40, depending on increase in fuel pressure. Further, a flow meter 8a is provided in the manner communicating to tank 18 and it is also connected operatively to air valve 3. The flow meter 8a is also communicated to injector 337 for controlling quantity of fuel injection. |
