Patent ID: 7131426

Claim:
A fuel injection system comprising a low pressure feed pump for pumping up fuel oil as fluid from a fuel tank, an amount control throttle valve for controlling, under the throttling effect, an amount of fuel oil fed by said feed pump and a supply pump for boosting the fuel oil, which has been controlled in amount by said amount control throttle valve, to higher pressure by movement of a plunger and supplying the same to fuel injection means, wherein said amount control throttle valve is a flow rate control valve for controlling the flow rate of fluid flowing through a valve by controlling opening/closing of said valve under the effect of electromagnetic force, wherein said flow rate control valve comprises a housing having an axis and an internal space, a cylindrical columnar mover placed in the internal space of said housing and movable in the axial direction under the effect of electromagnetic force while defining a first chamber and a second chamber which are closed by opposite end portions thereof, a valve member for controlling a passageway area through which the fluid flows, in response to the movement of said mover, and a flow passageway attached to said cylindrical columnar mover and for flowing the fluid from said first chamber to said second chamber or vice versa, in accordance with the movement of said mover, and wherein said flow rate control valve further comprises rotation means for rotating said mover about said axis by using of a work of the fluid flowing through said flow passageway and wherein the flow passageway attached to the cylindrical columnar mover is separated from the passageway including the valve through which the fluid to be controlled flows.