B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
172/17
B01D 39/20 (2006.01) F01N 3/027 (2006.01) F01N 3/032 (2006.01) F01N 9/00 (2006.01) F02B 1/04 (2006.01)
Patent
CA 1229556
-16- ABSTRACT An apparatus is disclosed for regenerating a filter trap used to collect particulates from the exhaust gas of an internal combustion engine. The apparatus comprises: (a) means providing a flow of a heat transfer medium through the filter trap; (b) means for heating the heat transfer medium to a temperature effective to incin erate the particulates in the filter trap; and (c) a flow mask stationed in the flow of heat transfer medium, upstream from said filter trap, effective to divert the heat transfer medium away from the radially inner zone of the filter trap while guiding the heat transfer medium to engage and ignite the particulates along a radially outer region of the filter trap. The mask is a circular disc and spaced upstream from the filter trap efective to mask a central core area of the flow of heat transfer medium. The means for heating comprises one or more electrically heated resistance elements arranged in a planar coil conrfiguration extending transversely across the flow of heat transfer medium. A flow diffuser is stationed upstream from the mask and is comprised of a plurality of foraminous plates effective to diffuse and slow down the flow of heat transfer medium for increasing heat exchange. The flow diffuser has a radiation reflec- tive coating to limit heat losses and a member is em- ployed for depressing the temperature required to ignite the particulates.
466700
Rao Vemulapalli D.n.
Wade Wallace R.
Ford Motor Company Of Canada Limited
Sim & Mcburney
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