Patent ID: 6029682
Filing Date: 2000-02-29
Classification: F02M,F16K,Y10T

Abstract:
An electromagnetic valve in a fuel supply system, comprising:a valve body including a bore therein, the bore comprising at least one seat;a shuttle assembly including a spool disposed in the bore slideably between at least an open valve position in which the spool is spaced from the seat, and a closed valve position in which the spool is forcibly engaging the seat;an armature assembly connected with the valve body, the armature:moveable relative to the shuttle assembly;moveable relative to the valve body along a total range of motion that is limited in a first direction by a first armature position relative to the valve body at which the armature assembly is forcibly engaged with the valve body, and is limited in a second direction opposite the first direction by a second armature position relative to the valve body at which the armature assembly is forcibly engaged with the shuttle assembly;able to reach the first armature position only when the spool is at the fully open position;able to reach the second armature position only when the spool is at the closed position; andable to reach an intermediate position between the first armature position and the second armature position at which the armature assembly is not forcibly engaged with the shuttle assembly;an armature biasing member, connected with the armature assembly, that biases the armature in a first direction;a coupler biasing member, connected with the armature assembly and with the shuttle assembly, that biases the armature assembly and the shuttle assembly toward each other; anda solenoid connected to the valve body and actuateable to move the armature assembly in the second direction,the armature assembly and the shuttle assembly disposed in the valve such that whenever the armature assembly is at the second armature position the armature assembly is prevented from moving any further in the second direction by the forcible engagement of the armature assembly with the shuttle assembly.