Engine Exhaust Gas Particulate Filter having Helically Configured Cells
An engine exhaust gas particulate filter comprises a plurality of paired longitudinal flow cells having a first flow cell channel and a second flow cell channel. The first flow cell channel is disposed in fluid communication with the second flow cell channel through a common permeable filtration wall. Each of the plurality of paired longitudinal flow cells forms a non-linear flow path about a longitudinal axis of the engine exhaust gas particulate filter.
1 . An engine exhaust gas particulate filter comprising:
a plurality of paired longitudinal flow cells having a first flow cell channel and a second flow cell channel, the first flow cell channel being disposed in fluid communication with the second flow cell channel via a common permeable filtration wall;
wherein each of the plurality of paired longitudinal flow cells forms a non-linear shape about a longitudinal axis of the engine exhaust gas particulate filter.
2 . The engine exhaust gas particulate filter of claim 1 , wherein:
the first flow cell channel has a first open end at a proximal end of the engine exhaust gas particulate filter, and a second closed end at a distal end of the engine exhaust gas particulate filter.
3 . The engine exhaust gas particulate filter of claim 1 , wherein:
the second flow cell channel has a first closed end at a proximal end of the engine exhaust gas particulate filter, and a second open end at a distal end of the engine exhaust gas particulate filter.
4 . The engine exhaust gas particulate filter of claim 1 , wherein:
the non-linear shape is a generally helical shape.
5 . The engine exhaust gas particulate filter of claim 1 , wherein:
the non-linear shape is a compound bend.
6 . The engine exhaust gas particulate filter of claim 1 , wherein:
the non-linear shape is an increasing radius bend.
7 . The engine exhaust gas particulate filter of claim 1 , wherein:
the non-linear shape is a decreasing radius bend.
8 . The engine exhaust gas particulate filter of claim 1 , wherein:
the non-linear shape is a decreasing radius compound bend having a generally helical shape.
9 . An exhaust system comprising:
an engine exhaust gas particulate filter having a plurality of paired longitudinal flow cells, each of the plurality of paired longitudinal flow cells having a first flow cell channel and a second flow cell channel, the first flow cell channel being disposed in fluid communication with the second flow cell channel via a common permeable filtration wall;
wherein each of the plurality of paired longitudinal flow cells forms a non-linear shape about a longitudinal axis of the engine exhaust gas particulate filter.
10 . The exhaust system of claim 9 , wherein:
the first flow cell channel has a first open end at a proximal end of the engine exhaust gas particulate filter, and a second closed end at a distal end of the engine exhaust gas particulate filter.
12 . The exhaust system of claim 9 , wherein:
the second flow cell channel has a first closed end at a proximal end of the engine exhaust gas particulate filter, and a second open end at a distal end of the engine exhaust gas particulate filter.
13 . The exhaust system of claim 9 , wherein:
the non-linear shape is a generally helical shape.
14 . The exhaust system of claim 9 , wherein:
the non-linear shape is a compound bend.
15 . The exhaust system of claim 9 , wherein:
the non-linear shape is an increasing radius bend.
16 . The exhaust system of claim 9 , wherein:
the non-linear shape is a decreasing radius bend.
17 . The exhaust system of claim 9 , wherein:
the non-linear shape is a decreasing radius compound bend having a generally helical shape.
18 . A vehicle comprising:
an exhaust system having an engine exhaust gas particulate filter having a plurality of paired longitudinal flow cells, each of the plurality of paired longitudinal flow cells having a first flow cell channel and a second flow cell channel, the first flow cell channel being disposed in fluid communication with the second flow cell channel via a common permeable filtration wall;
the first flow cell channel having a first open end at a proximal end of the engine exhaust gas particulate filter, and a second closed end at a distal end of the engine exhaust gas particulate filter;
the second flow cell channel having a first closed end at a proximal end of the engine exhaust gas particulate filter, and a second open end at a distal end of the engine exhaust gas particulate filter
wherein each of the plurality of paired longitudinal flow cells forms a non-linear shape about a longitudinal axis of the engine exhaust gas particulate filter.
19 . The vehicle of claim 18 , wherein:
the non-linear shape is a generally helical shape.
20 . The vehicle of claim 18 , wherein:
the non-linear shape is a compound bend.