| 摘要 |
2106972 9217688 PCTABS00016 An efficient, economical, compact diesel particulate filter (10) comprising a casing (11) with a plurality of concentric, spaced, perforated, supported, substantially rigid tubes (15, 16, 17, 18, 19) substantially filling the casing (11) radially, wherein the perforated surface of each tube is covered by a filtering element (35, 36, 37, 38, 39) comprising substantially helically wound inorganic yarn, wherein each space between tubes is blocked at only one end of the tubes (15-19) so that exhaust entering an unblocked space at one end of the casing passes radially inwardly and outwardly through filtering elements (35-39) before exiting through an unblocked space at the other end of the casing (11).
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