Injector fluid filter with upper and lower lip seal
AssigneeTenneco Automotive Operating Company Inc.
InventorOlaf Enke
Life of this patent
Estimating the term…
Abstract
An injector for injecting a reagent includes an axially translatable valve member positioned within a housing. A flux sleeve is surrounded by a coil of an electromagnet. A pole piece defines a return passageway for reagent to flow. A filter surrounds the pole piece and includes a cage and a mesh fixed to the cage. The cage includes a deformable first seal biasedly engaging an outer surface of the pole piece. The cage includes a second seal biasedly engaging the housing. The first and second seals define a closed volume such that all of the reagent flowing through the injector passes through the mesh.
Claims20
An injector for injecting a reagent, the injector comprising:
- a housing;
- an axially translatable valve member positioned within the housing;
- an electromagnet positioned within the housing and including a coil of wire circumscribing at least a portion of the axially translatable valve member, wherein the axially translatable valve member moves between a seated position and an unseated position in response to energizing the electromagnet;
- a flux frame surrounding the coil of wire, the flux frame including a first and second radially extending portions axially spaced apart from one another, extending along parallel planes positioned on opposite sides of the coil of wire;
- a flux sleeve including two magnetic flux bridge collar portions interconnected by one of a magnetic flux bridge portion and a non-magnetic flux break portion, each of the two magnetic flux bridge collar portions being intersected by one of first and second planes in which the first and second radially extending flux frame portions lie to define flux bridges, the one of a flux bridge portion and a flux break portion being surrounded by the coil of wire and axially positioned between the parallel planes;
- a tubular pole piece disposed within the housing, wherein the tubular pole piece defines a return passageway for reagent to flow when the axially translatable valve member is at at least one of the seated position and the unseated position;
- and
- a filter positioned within the housing and surrounding the tubular pole piece, the filter including a cage and a mesh fixed to the cage, the mesh covering windows extending through the cage, the cage having a deformable first seal biasedly engaging an outer surface of the tubular pole piece, the cage including a second seal biasedly engaging the housing, the deformable first seal and the second seal defining a closed volume between the housing and the filter such that all of the reagent flowing through the injector passes through the mesh.
An injector for injecting a reagent, the injector comprising:
- a housing;
- an axially translatable valve member positioned within the housing;
- a pole piece disposed within the housing;
- an electromagnet positioned within the housing and including a cylindrically-shaped coil of wire, wherein the axially translatable valve member moves between a seated position and an unseated position in response to energizing the electromagnet;
- a flux sleeve passing through the cylindrically-shaped coil of wire and including two magnetic portions interconnected by one of a magnetic flux bridge portion and a non-magnetic flux break portion, each of the magnetic portions being aligned with transverse planes defined by ends of the cylindrically-shaped coil of wire wherein a reagent flow path extends between the flux sleeve and the pole piece;
- and
- a filter positioned within the housing and surrounding the pole piece, the filter including a cage and a mesh fixed to the cage, the mesh covering windows extending through the cage, the cage having a deformable first seal biasedly engaging an outer surface of the pole piece, the cage including a second seal biasedly engaging the housing, the cage also including a seat engaging the flux sleeve, the deformable first seal and the second seal defining a closed volume between the housing and the filter such that all of the reagent flowing through the injector passes through the mesh.
Dependencies are inferred from the claim text.