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US 6,386,467 B1Granted
Injectors
AssigneeAisan Kogyo Kabushiki Kaisha
InventorSumito Takeda
Life of this patent
Estimating the term…
Abstract
An integrally formed cylinder 2 having alternating magnetic 2b, 2d and non-magnetic portions 2a, 2c, 2e for use in an injector. At least two solenoid coils 12, 14 are disposed about the cylinder 2 to urge an armature 4b to open and close a valve 4a. The non-magnetic portions 2a, 2c, 2e of the cylinder 2 ensure that magnetic paths for opening and closing the valve are magnetically insulated from each other. The integrally formed cylinder 2 is leak proof and thus does not require O-rings or other sealing structures for sealing the fuel path 4e, 4f from the solenoid coils 12, 14. A protrusion 2z may be formed on the cylinder 2 to assist in positioning the solenoid coils 12, 14.
Claims34
An injector comprising:
- a common cylinder comprising a first non-magnetic portion and first and second magnetic portions disposed on opposite sides of the first non-magnetic portion, the first non-magnetic portion and the first and second magnetic portions forming an integral, leak proof cylinder, wherein a substantially hollow fuel passage is defined within an interior of the common cylinder,
- an armature slidably disposed within the fuel passage of the common cylinder, the armature having a forward edge, a rearward edge and a substantially hollow fuel passage provided within an interior of the armature, the armature being adapted to move in response to magnetic fields,
- a first solenoid coil coaxially disposed about the common cylinder adjacent to the forward edge of the armature,
- a second solenoid coil coaxially disposed about the common cylinder adjacent to the rearward edge of the armature, wherein a space exists between the first solenoid coil and the second solenoid coil and said space is adjacent to the first non-magnetic portion of the common cylinder and
- a value coupled to the armature, wherein the valve closed in response to a magnetic field generated by the first solenoid coil and the valve opens in response to a magnetic field generated by the second solenoid coil.
2 more elements
An apparatus comprising:
- a common cylinder comprising a first, second and third non-magnetic portions and first and second magnetic portions, the first and second non-magnetic portions disposed on opposite sides of the first magnetic portion and the second and third non-magnetic portions disposed on opposite sides of the second magnetic portion, the first, second and third non-magnetic portions and the first and second magnetic portions forming an integral, leak proof cylinder,
- an armature slidably disposed within the common cylinder, the armature having a forward edge and a rearward edge, the armature being adapted to move in response to magnetic fields,
- a first solenoid coil coaxially disposed about the common cylinder adjacent to the forward edge of the armature,
- a second solenoid coil coaxially disposed about the common cylinder adjacent to the rearward edge of the armature, wherein a space exists between the first solenoid coil and the second solenoid coil and said space is adjacent to the second non-magnetic portion of the common cylinder, and
- a valve coupled to the armature, wherein the valve closes in response to a magnetic field generated by the first solenoid coil and the valve opens in response to a magnetic field generated by the second solenoid coil.
2 more elements
An apparatus comprising:
- a common cylinder comprising a non-magnetic portion and first and second magnetic portions disposed on opposite sides of the non-magnetic portion, the non-magnetic portion and the first and second magnetic portions forming an integral, leak proof cylinder, wherein the non-magnetic portion continuously extends from an inner surface of the common cylinder to an outer surface of the common cylinder and an axially formed protrusion is disposed on the outer surface of the non-magnetic portion,
- an armature slidably disposed within the common cylinder, the armature having a forward edge and a rearward edge, the armature being adapted to move in response to magnetic fields,
- a first solenoid coil coaxially disposed about the common cylinder adjacent to the forward edge of the armature,
- a second solenoid coil coaxially disposed about the common cylinder adjacent to the rearward edge of the armature, wherein a space exists between the first solenoid coil and the second solenoid coil and said space is adjacent to the non-magnetic portion of the common cylinder and wherein the axially formed protrusion of the common cylinder extends into the space between the first solenoid coil and the second solenoid coil, and
- a valve coupled to the armature, wherein the valve closes in response to a magnetic field generated by the first solenoid coil and the valve opens in response to a magnetic field generated by the second solenoid coil.
2 more elements
An apparatus comprising:
- a common cylinder comprising a non-magnetic portion and first and second magnetic portions disposed on opposite sides of the non-magnetic portion, the non-magnetic portion and the first and second magnetic portions forming an integral, leak proof cylinder, wherein the non-magnetic portion continuously extends from an inner surface of the common cylinder to an outer surface of the common cylinder,
- an armature slidably disposed within the common cylinder, the armature having a forward edge and a rearward edge, the armature being adapted to move in response to magnetic fields,
- a first solenoid coil coaxially disposed about the common cylinder adjacent to the forward edge of the armature,
- a second solenoid coil coaxially disposed about the common cylinder adjacent to the rearward edge of the armature, wherein a space exists between the first solenoid coil and the second solenoid coil and said space is adjacent to the non-magnetic portion of the common cylinder and
- a valve coupled to the armature, wherein the valve closes in response to a magnetic field generated by the first solenoid coil and the valve opens in response to a magnetic field generated by the second solenoid coil.
2 more elements
Dependencies are inferred from the claim text.