Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1995-08-28
1997-04-15
Spitzer, Robert
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55314, 55523, 55DIG10, 55DIG30, B01D 3518, B01D 4600
Patent
active
056204906
ABSTRACT:
This diesel particulate filter apparatus comprises a main filter, a sub-filter provided in a central portion of the main filter, and a bypass cylinder interposed between the main filter and sub-filter. A filter body constituting the main filter is made of long ceramic fiber, and the surface of the filter body is covered with a metal net, which is then fixed thereto. A heat resisting metal coil is provided on the surface of the filter body which is at the exhaust gas introducing side, and a ceramic fiber twisting is wound around and fixed to the filter body. A bypass valve adapted to be opened and closed by an actuator is provided on an exhaust gas introducing side of the sub-filter, and an admission port of the sub-filter is opened and closed by the bypass valve. Each wire rod constituting the metal net comprises a core member formed out of a material containing Ni and Cr and having a low resistance temperature coefficient and a large specific electric resistance value, and an intermediate member coating the core member and formed out of a material having a high resistance temperature coefficient and a small specific electric resistance value. The wire rod is covered with a corrosion resisting layer of coating of Al.sub.2 O.sub.3 or ZrO.sub.2.
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Isuzu Ceramics Research Institute Co. Ltd.
Spitzer Robert
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