| 摘要 |
PURPOSE:To improve the response and accuracy and to protect the engine by providing a check valve, normal-close solenoid valve, relief valve system and relief valve regulating system. CONSTITUTION:By the damping function of fuel existing between an armature 63 and sheet member and the resilient buffering function of the sheet member 67, the armature 63 is damped and contact against the core 65 to suppress bouncing of valve body 62 considerably thus to rise/fall the pressure of fuel in the needle chamber 42 quickly and to enable accurate control of injection timing and injection amount. In case of fault of solenoid valve 60, breakdown or runaway can be prevented reliably by means of a relief valve system 70 and a pressure regulator 76. electromagnetic actuator 80, etc. as the relief valve regulator. |
