Abstract: An electromagnetically actuatable disc-type valve includes a pre-assembled hydraulic sub-assembly with a core member and a separately pre-assembled electrical sub-assembly with a body. The exterior surface of the core member is configured to facilitate insertion into the electrical sub-assembly and orientation relative thereto by use of a bushing. The outside diameter of the body of the valve is no more than 13.5 millimeters in the vicinity of the delivery end of the hydraulic sub-assembly. A fluid filter is disposed between a tensioning spring and a calibration slide to facilitate more accurate flow checking and leakage checking of the valve during manufacture.

Abstract: A method of assembling an electromagnetically actuatable disc-type valve permits separate assembly of the hydraulic components from the electrical components. The constant shape of the exterior surface of the core member enables the hydraulic sub-assembly to be assembled separately from the electrical sub-assembly and thereafter inserted into the electrical sub-assembly. The valve's plastic covering is applied to the electrical components separately and before the hydraulic components are assembled with the electrical components. In this way, the heat involved does not affect the calibration of the hydraulic components. A bushing is disposed to lock the two sub-assemblies at the desired relative orientation. The fluid filter is inserted into the valve before the calibration slide is inserted into the valve. The valve is flow checked before setting the tension on the armature of the valve.

Abstract: An electromagnetically actuatable disc-type valve includes a pre-assembled hydraulic sub-assembly with a core member and a separately pre-assembled electrical sub-assembly with a body. The exterior surface of the core member is configured to facilitate insertion into the electrical sub-assembly and orientation relative thereto by use of a bushing. The outside diameter of the body of the valve is no more than 13.5 millimeters in the vicinity of the delivery end of the hydraulic sub-assembly. A fluid filter is disposed between a tensioning spring and a calibration slide to facilitate more accurate flow checking and leakage checking of the valve during manufacture.

Abstract: A gasoline fuel injector wherein the valve member is in the form of a plate which is attracted towards a pair of pole faces when a winding is energized and the extent of movement of the valve member is limited by a non-magnetic spacer member which is of annular form. In order to reduce the possibility of the valve member sticking to the spacer member the contact area between the valve member and spacer member is minimized by the provision of radially inwardly extending circumferentially spaced tongues engageable by the valve member in the open position.