Exhaust treatment device facilitating through-wall flow
AssigneeFord Global Technologies, LLC
InventorsRay Willey, Bret A. Zimmerman, David J. Kubinski, Diana D. Brehob
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Abstract
A method of manufacturing an emissions treatment device for an internal combustion engine includes disposing washcoated fibers between layers of a porous substrate to form multiple substantially parallel layers with a first group of layers at least partially open along the entire length of the layer. The porous substrate may be a stainless steel mesh with the method further including washcoating the substrate prior to disposing the washcoated fibers between the layers.
Claims19
A method of manufacturing an emissions treatment device for an internal combustion engine, the method comprising:
- disposing washcoated fibers between layers of a porous substrate to form multiple substantially parallel layers with a first group of layers at least partially open along the entire length of the layer;
- and
- disposing different densities of washcoated fibers in different layers of the emissions treatment device.
A method of manufacturing an emissions treatment device, comprising:
- disposing washcoated fibers between layers of a porous substrate to form multiple substantially parallel layers with a first group of layers at least partially open along their entire length;
- and
- forming a second group of layers and substantially blocking the second group of layers only near one end by washcoated fibers, the second group of layers being at least partially open at an opposite end.
A method for manufacturing an emissions treatment device comprising:
- forming parallel layers of a porous substrate with a first group of layers at least partially open on both upstream and downstream ends and a second group of layers substantially blocked only near one end by washcoated fibers;
- and
- disposing washcoated fibers within at least some of the layers to increase back pressure and facilitate exhaust flow through the substrate to adjacent layers.
A method for making an emissions treatment device for an internal combustion engine, the method comprising:
- forming at least first and second groups of parallel channels in a porous substrate with the first group of channels at least partially open along their length;
- plugging channels of the second group at or near a first end and leaving a second end of the plugged channels at least partially open;
- washcoating the substrate after plugging the second group of channels;
- disposing washcoated fibers within at least some of the channels, wherein different densities of washcoated fibers are disposed in different channels;
- and
- forming flow restrictors in the first group of channels at or near an outlet end of each channel.
Dependencies are inferred from the claim text.