Diesel particulate monitor

Details Diesel particulate monitor Diesel particulate monitor

G - Physics

01

N

G01N 21/75 (2006.01) G01N 1/00 (2006.01) G01N 15/06 (2006.01) G01N 31/00 (2006.01) F02B 3/06 (2006.01) G01N 1/22 (2006.01) G01N 15/02 (2006.01) G01N 30/00 (2006.01)

Patent

CA 2089758

Particulate concentration of diesel exhaust is measured by collecting the diesel particulate on a filter (18) while measuring the amount of exhaust passing through the filter (18). The filtered particulate is then heated in an oxygen rich environment (32) to oxidize carbon within the particulate to carbon dioxide. The amount of resulting carbon dioxide is measured in meter (38) to de- rive a corresponding measurement of the amount of filtered particulate. Particulate concentration is calculated by comparing the amount of exhaust passed through the filter. Filtered particulate can be heated incrementally to obtain a measurement of volatile components within the particulate prior to the oxidation of the non-volatile carbon component. The filter (18) employed to collect the particulate is of a high temperature resistant type making it reusable and can be either integral with or inserted into the oxida- tion chamber of the instrument. Oxidation of the particulate inherently concurrently cleans the filter for reuse.

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