| 摘要 |
<p>A unitized fuel injection system having a common fuel rail (10), a fuel pressure regulator (18) permanently attached to one end of the fuel rail (10) and a plurality of fuel injector valves (20) having progressive die formed housings (80) permanently attached to the fuel rail (10). Each fuel injector valve (20) embodies a light weight movable valve member (110, 116) electromechanically actuated by a solenoid coil assembly (126), a stationary valve member (102) having a conical valve seat (106) and a metering plate (98) having a metering orifice (100). The movable valve member (110, 116) has an armature (116) and a valve stem (110) having a spherical end surface mating with the conical valve seat (106). The displacement of the movable valve member (110, 116) is sufficient to allow the fuel flow to be controlled by the size of the metering orifice (100) and virtually independent of the position of the valve stem (110). Design of the fuel injector valve (20) is directed to minimize machining operations of the valve's component parts.</p> |
