PURPOSE: To shut off the flow of fuel to an injector according to a command by providing a means for supplying an output pressure signal to a shutoff port and first and second input pressure signal generation valves for selectively supplying high and low input pressure signals to an output pressure signal generating means.

CONSTITUTION: High-pressure fuel 9 flows in a fuel supply line 12. A shutoff valve 10 is closed when high pressure is applied to an operation port 14. The operation port 14 is connected to a sequence valve 20, and the inlet ports 22 and 24 of high and low pressure lines and control ports 26 and 28 are provided. When high pressure is applied on the port 26 of a supply side, the inlet and outlet ports 24 and 18 are connected to open the shutoff valve 10, and when high pressure is applied to the control port 28, the shutoff valve 10 is closed. The sequence valve 20 is controlled by solenoid valves 30, 50 and 52 and, by the pressing of the solenoid valve 30, the operation port 14 is trained to open the shutoff valve 10. When the solenoid valve 50 is pressed, the shutoff valve 10 is closed. Thus, the flow of fuel is shut off by independent inputs.