Integrated grommet filter
AssigneeCaterpillar Inc.
InventorsPrathap J. Boddeda, Stephen Ellis Oedewaldt
Life of this patent
Estimating the term…
Abstract
A diesel engine aftertreatment system is disclosed. The aftertreatment system includes a diesel exhaust fluid (DEF) injection system including a selective catalytic reduction (SCR) device, a DEF tank connected to the SCR device, a DEF injection device installed in the tank, and an integrated grommet filter. The integrated grommet filter includes a grommet having a top gasket portion and a bottom cylindrical skirt portion. The cylindrical skirt portion is integrally connected to a sock filter. In an embodiment, the integral connection between the skirt portion and the sock filter includes an overlap and stitching. In an embodiment, the gasket is a star shaped gasket.
Claims19
A diesel exhaust fluid (DEF) injection and filtration assembly for use in a DEF tank of an engine aftertreatment system, the DEF injection and filtration assembly comprising:
- a DEF injection device with a flange, the flange having a lip portion extending therefrom;
- and
- an integrated grommet filter comprising a grommet integrally connected to a sock filter, the grommet having a gasket portion and a skirt portion;
- wherein the gasket portion includes a plurality of cut-out portions annularly spaced apart from one another around a center axis;
- and
- wherein the gasket portion forms an outer periphery and an inner periphery, and the plurality of cut-out portions extend radially between the outer periphery and the inner periphery.
A fluid injection and filter assembly for use in a diesel exhaust fluid (DEF) tank, the fluid injection and filter assembly comprising:
- a skirt-style grommet including an annular gasket portion and a cylindrical skirt portion;
- the annular gasket portion including a plurality of cut-out portions annularly spaced around a center axis defined by the cylindrical skirt portion;
- a sock filter integrally connected to the cylindrical skirt portion;
- and
- a circular flange including a top portion and a lip portion protruding from an outer circumference of the top portion.
An integrated grommet filter for use in a diesel exhaust fluid (DEF) tank of an engine aftertreatment system, the integrated grommet filter comprising:
- a sock filter;
- a non-permeable flexible grommet having (i) a cylindrical skirt defining a center axis and having a bottom portion overlapping and integrally connected to the sock filter and (ii) a gasket orthogonally connected to a top portion of the cylindrical skirt, and the gasket including a plurality of protrusions extending radially outward, and a plurality of bolt holes formed in the plurality of protrusions;
- wherein the cylindrical skirt and the gasket of the non-permeable flexible grommet are formed as a single piece.
Dependencies are inferred from the claim text.