Method of assembling electromagnetically actuated disc-type valve

A method of assembling an electromagnetically actuatable disc-type valve for metering the supply of fluid, the valve having a body, a plastic jacket, electrical components, and a self-contained hydraulic sub-assembly including a lift stop member, a core member with an exterior surface, a nozzle with an interior surface, a valve seat, and an armature, the method comprising the steps of:

• assembling the self-contained hydraulic sub-assembly separate from the electrical components of the valve;
• providing a plastic jacket about at least a portion of the body of the valve and the electrical components of the valve prior to the assembly of the hydraulic sub-assembly within the plastic jacket and the valve body;
• static flow testing the hydraulic sub-assembly prior to the assembly of the hydraulic sub-assembly within the plastic jacket and the valve body and
• thereafter connecting the hydraulic sub-assembly with the body of the valve and the electrical components, including inserting the hydraulic sub-assembly into the plastic jacket and the valve body.

A method of assembling an electromagnetically actuatable disc-type valve for metering the supply of fluid, the valve having an electrical sub-assembly including a plastic jacket and at least one distinguishing feature, the valve having an hydraulic sub-assembly including a supply end and a delivery end disposed opposite to the supply end, the hydraulic sub-assembly also including a core member with an exterior surface at the supply end, the hydraulic sub-assembly further including at least one distinguishing feature on the delivery end, the at least one distinguishing features aligning the hydraulic sub-assembly and the electrical sub-assembly relative to each other, the method comprising the steps of:

• assembling each of the hydraulic sub-assembly and electrical sub-assembly separate from each other;
• providing the plastic jacket only as a component of the electrical sub-assembly prior to assembling the hydraulic sub-assembly and electrical sub-assembly;
• inserting the hydraulic sub-assembly through the plastic jacket and into the electrical sub-assembly so that each of the supply end and delivery end of the hydraulic sub-assembly protrudes past the electrical sub-assembly;
• disposing a top bushing between the hydraulic sub-assembly at the supply end of the hydraulic sub-assembly and an upper end of the plastic jacket;
• thereafter orienting the at least one distinguishing feature of the hydraulic sub-assembly with respect to the at least one distinguishing feature of the electrical sub-assembly;
• and
• thereafter welding the top bushing to the hydraulic sub-assembly so as to hold the hydraulic sub-assembly relative to the electrical sub-assembly.

A method of assembling an electromagnetically actuatable disc-type valve for metering the supply of fluid, the valve having an armature and a fluid filter, the method comprising the steps of:

• inserting the fluid filter into a core passage defined in the valve;
• thereafter inserting a calibration slide into the core passage of the valve so that said filter is disposed between said calibration slide and the armature;
• thereafter using said calibration slide to set the biasing tension on the armature;
• and
• wherein said step of inserting the fluid filter comprises disposing the filter within the core passage so as to be in position within the core passage relative to the calibration device to intercept any debris caused by said steps of inserting the calibration device and setting the biasing tension on the armature.