| 摘要 |
PURPOSE:To aim at safety in case of trouble happening in an overflow regulating solenoid valve, by installing a separate overflowing mechanism in addition to the overflow regulating solenoid valve. CONSTITUTION:An overflow regulating solenoid valve 20 is installed in a passage interconnecting a high pressure chamber 10 of a fuel-injection pump to the low pressure side, while as a separate overflowing mechanism, a spill port 51 and a spill ring 52 are installed in a plunger 8 and driven by an actuator 60. Thus even when trouble happens in the solenoid valve 20, this separate overflowing mechanism is operated whereby an injection quantity is limited to the specified value and any danger such as overrunning or the like is preventable from occurring. |
