| 简介 |
FIELD : machine engineering.
SUBSTANCE : filter contains a flow substrate including a plurality of channels. The plurality of substrate channels comprises a plurality of input channels having an open input end and a closed output end and a plurality of output channels having a closed input end and an open output end. The inner walls surface of the plurality of inlet channels comprise a thin layer of at least one input coating composition comprising at least one refractory metal oxide, an optionally stabilized rare earth metal oxide. The outer surfaces of the inner walls of the plurality of outlet channels comprise a thin layer of at least one composition of the wall outlet coating comprising at least one refractory metal oxide, optionally a stabilized rare earth metal oxide. Coatings of the inlet and outlet channels may contain at least one catalytically active metal selected from the group consisting of platinum, palladium, iridium, rhodium, silver, gold, mixtures of any two or more thereof. The outlet coating length along the axis is greater than the inlet coating length along the axis. The invention also provides an exhaust system 40 comprising a catalytic particle filter 8 in accordance with the invention.
EFFECT : reliability increase.
45 cl, 3 dwg |
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