Inline filter assembly with purge valving
AssigneeCummins Emission Solutions Inc.
InventorsChetan Ponnathpur, Tushar Tej Dandu
Life of this patent
Estimating the term…
Abstract
An inline reductant filter assembly includes a filter housing, a filter media, and one or more valves. The filter housing is fluidly coupled to an upstream portion of a reductant line and a downstream portion of the reductant line. The filter media is positioned in the filter housing. The one or more valves are selectively movable from a first position to a second position. In the first position, the one or more valves permit fluid to flow along a first fluid flow path from the upstream portion of the reductant line, through the filter media, to the downstream portion of the reductant line. In the second position, the one or more valves prevent fluid from flowing along the first fluid flow path through the filter media.
Claims20
An assembly comprising:
- a reductant line comprising an upstream portion, a bypass portion continuous with the upstream portion, and a downstream portion continuous with the bypass portion;
- a filter housing configured to be fluidly coupled to the upstream portion of the reductant line and the downstream portion of the reductant line;
- a filter media positioned in the filter housing;
- and
- a first valve selectively movable from a first position to a second position;
- wherein:
- an inlet channel is located in the filter housing upstream of the filter media, and an outlet channel is located in the filter housing downstream of the filter media;
- when the first valve is in the first position, the first valve is located between the bypass portion of the reductant line and the downstream portion of the reductant line, and reductant is flowable along a first fluid flow path from the upstream portion of the reductant line, through the filter media, to the downstream portion of the reductant line;
- and
- when the first valve is in the second position, the first valve is located between the outlet channel of the filter and the downstream portion of the reductant line to prevent fluid from flowing along the first fluid flow path through the filter media, and reductant is flowable along a second fluid flow path from the downstream portion of the reductant line to the bypass portion of the reductant line and from the bypass portion of the reductant line to the upstream portion of the reductant line.
An assembly comprising:
- a reductant line comprising an upstream portion and a downstream portion;
- a purge line connected with the downstream portion of the reductant line;
- a filter housing configured to be fluidly coupled to the upstream portion of the reductant line and the downstream portion of the reductant line;
- a filter media positioned in the filter housing;
- and
- a first valve selectively movable from a first position to a second position;
- wherein:
- an inlet channel is located in the filter housing upstream of the filter media, and an outlet channel is located in the filter housing downstream of the filter media;
- when the first valve is in the first position, the first valve is located between the purge line and the downstream portion of the reductant line, and reductant is flowable along a first fluid flow path from the upstream portion of the reductant line, through the filter media, to the downstream portion of the reductant line;
- and
- when the first valve is in the second position, the first valve is located between the outlet channel of the filter and the downstream portion of the reductant line to prevent fluid from flowing along the first fluid flow path through the filter media, and reductant is flowable along a second fluid flow path from the downstream portion of the reductant line out to the purge line.
Dependencies are inferred from the claim text.