Electromagnetic valve

An electromagnetic valve to be fixed to a base housing for controlling fluid flow in housing fluid passages provided in the base housing, comprising:

• a case member having a stator and a valve case, the case member being provided inside with a cylindrical hollow extending from the valve case to the stator;
• a coil member arranged around the case member on a side of the stator;
• and
• a cylindrical moving member having an armature and a valve body, the moving member being housed in the cylindrical hollow so that the valve body is in slidable contact with the valve case for controlling the fluid flow and being moved axially when the coil member is energized to generate magnetic flux passing through the stator and the armature,
• wherein the case member and the cylindrical moving member are characterized by at least one of a feature that the valve case and at least a part of the stator are integrally formed into one body to constitute a composite valve case and a feature that the valve body and the armature are integrally formed into one body to constitute a composite valve body, and
• wherein the case member is provided with a flange surface extending outward perpendicularly to an axis thereof and, when the electromagnetic valve is fixed to the base housing, a clearance between the flange surface and an outer wall surface of the base housing is fluid-tightly sealed.

An electromagnetic valve to be fixed to a base housing for controlling fluid flow in housing fluid passages provided in the base housing, comprising:

• a case member having a stator and a valve case, the case member being provided inside with a cylindrical hollow extending from the valve case to the stator;
• a coil member arranged around the case member on a side of the stator;
• and
• a cylindrical moving member having an armature and a valve body, the moving member being housed in the cylindrical hollow so that the valve body is in slidable contact with the valve case for controlling the fluid flow and being moved axially when the coil member is energized to generate magnetic flux passing through the stator and the armature,
• wherein the case member and the cylindrical moving member are characterized by at least one of a feature that the valve case and at least a part of the stator are integrally formed into one body to constitute a composite valve case and a feature that the valve body and the armature are integrally formed into one body to constitute a composite valve body, and
• wherein the case member is provided outside with a flange surface extending outward perpendicularly to an axis thereof and the coil member is urged toward and fixed to the flange surface.

An electromagnetic valve to be fixed to a base housing for controlling fluid flow in housing fluid passages provided in the base housing, comprising:

• a case member having a stator and a valve case which are integrally formed into one body to constitute a composite valve case, the case member having a cylindrical hollow extending from the valve case to the stator;
• a coil member disposed around the case member near the stator;
• and
• a cylindrical moving member having an armature and a valve body which are integrally formed into one body, the moving member being disposed in the cylindrical hollow so that the valve body can move in the valve case when the coil member is energized to generate magnetic flux passing through the stator and the armature,
• wherein the stator comprises a first stator, a magnetic flux restricting element and a second stator integrally formed in the case member so that the magnetic flux mainly passes from the first stator via the armature of the moving member to the second stator, while bypassing the magnetic flux restricting element.