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US 6,578,817 B2Granted
Solenoid valve
AssigneeUnisia Jecs Corporation
InventorsYukinori Otsuka, Masahiko Hara
Life of this patent
Estimating the term…
Abstract
A solenoid valve includes a moving part, a plunger of magnetic material having one end facing an end face of the moving part, and a protrusion formed at the one end of the plunger and abutting on the end face of the moving part. During energization, a magnetic path is formed from a valve body to the moving part to produce an attraction force between the valve body and the moving part across a clearance. Magnetic flux running along the magnetic path becomes saturated at the protrusion.
Claims16
A valve arrangement, comprising:
- a body with an end face;
- a moving part slidably received in the body, the moving part being provided with an end face;
- a plunger slidably received in the body, the plunger having one end facing an end face of the moving part, the plunger being formed out of a magnetic material;
- and
- a protrusion formed at the one end of the plunger, the protrusion abutting on the end face of the moving part,
- a predetermined clearance being defined between the end face of the body and the end face of the moving part,
- during energization, a predetermined magnetic path being formed from the body to the moving part, the predetermined magnetic path producing an attraction force between the body and the moving part across the predetermined clearance, the attraction force pressing the moving part toward the plunger to provide a closed valve state,
- a predetermined magnetic flux running along the magnetic path becoming saturated at the protrusion, and
- the protrusion having a predetermined sectional area allowing saturation of the magnetic flux.
6 more elements
A solenoid valve, comprising:
- a body with an end face;
- a seat member slidably received in the body;
- a moving part slidably received in the body, the moving part being provided with an end face;
- a plunger slidably received in the body between the seat member and the moving part, the plunger having one end facing the end face of the moving part, the plunger being formed out of a magnetic material;
- a protrusion formed at the one end of the plunger, the protrusion abutting on the end face of the moving part;
- and
- a valve part arranged at another end of the plunger, the valve part abutting on the seat member,
- a predetermined clearance being defined between the end face of the body and the end face of the moving part,
- during energization, a predetermined magnetic path being formed from the body to the moving part, the predetermined magnetic path producing an attraction force between the body and the moving part across the predetermined clearance, the attraction force pressing the moving part toward the plunger, which makes the valve part abut on the seat member to provide a closed valve state,
- a predetermined magnetic flux running along the magnetic path becoming saturated at the protrusion, and
- the protrusion having a predetermined sectional area allowing saturation of the flux.
8 more elements
A valve arrangement, comprising:
- a body with an end face;
- a moving part slidably received in the body, the moving part being provided with an end face;
- a plunger slidably received in the body, the plunger having one end facing an end face of the moving part, the plunger being formed out of a magnetic material;
- and
- a protrusion formed at the one end of the plunger, the protrusion abutting on the end face of the moving part,
- wherein a predetermined clearance is defined between the end face of the body and the end face of the moving part,
- wherein during energization, a predetermined magnetic path is formed from the body to the moving part, the predetermined magnetic path producing an attraction force between the body and the moving part across the predetermined clearance, the attraction force pressing the moving part toward the plunger to provide a closed valve state,
- wherein a predetermined magnetic flux running along the magnetic path becomes saturated at the protrusion,
- wherein the protrusion has a predetermined sectional area allowing saturation of the magnetic flux, and
- wherein the protrusion has a protrudent amount greater than the predetermined clearance.
7 more elements
A valve arrangement, comprising:
- a body with an end face;
- a moving part slidably received in the body, the moving part being provided with an end face;
- a plunger slidably received in the body, the plunger having one end facing an end face of the moving part, the plunger being formed out of a magnetic material;
- and
- a protrusion formed at the one end of the plunger, the protrusion abutting on the end face of the moving part,
- wherein a predetermined clearance is defined between the end face of the body and the end face of the moving part,
- wherein during energization, a predetermined magnetic path is formed from the body to the moving part, the predetermined magnetic path producing an attraction force between the body and the moving part across the predetermined clearance, the attraction force pressing the moving part toward the plunger to provide a closed valve state,
- wherein a predetermined magnetic flux running along the magnetic path becomes saturated at the protrusion,
- wherein the protrusion has a predetermined sectional area allowing saturation of the magnetic flux,
- wherein the protrusion has a protrudent amount greater than the predetermined clearance,
- wherein the protrusion is arranged at a center portion of the plunger at the one end thereof, and
- wherein the protrusion is circular in cross section.
9 more elements
Dependencies are inferred from the claim text.