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US 5,347,809 AGranted
Apparatus and method for removing particulate from an exhaust gas filter
AssigneeCaterpillar Inc.
InventorsMark D. Moeckel, Donald J. Waldman
Life of this patent
Estimating the term…
Abstract
An apparatus and method are provided for cleaning exhaust particulate from a contaminated vehicle exhaust gas filter. Regeneration gases, oxygen content, and input heat are controlled in order to efficiently control the heat of regeneration.
Claims13
Apparatus for cleaning exhaust particulate from a contaminated vehicle exhaust gas filter having walls, an inlet end, an outlet end, and a central conduit having an axis and extending through the filter and opening on each end of the filter, comprising:
- first means for controllably closing the outlet end of the filter;
- second means for controllably injecting pressurized air outwardly in a direction generally transverse the axis of the central conduit adjacent the outlet end of the filter;
- third means for heating the injected pressurized air and gas discharging from the filter conduit, in response to flow of the injected air, prior to flow of the resultant heated gas mixture onto the outlet end of the contaminated filter and through said filter;
- and
- fourth means for maintaining the temperature of filter regeneration at preselected temperatures sufficient for removing exhaust particulate from said contaminated filter.
2 more elements
A method for cleaning particulate from a contaminated vehicle exhaust gas filter, comprising:
- Step 1. passing a first high pressure stream of air into a chamber in a direction generally parallel to an outlet end of the filter adjacent a central conduit of the filter and thereby pulling a second stream of gas through the central conduit and into contact with said first stream and forming a gaseous mixture;
- Step 2. heating the gaseous mixture;
- Step 3. passing the heated gaseous mixture through the filter in a direction from the outlet to the inlet end of the filter;
- Step 4. continuing steps 1-3 until the temperature of filter regeneration reaches a preselected magnitude;
- and
- Step 5. maintaining the preselected temperature by controlling the heating of the gaseous mixture.
3 more elements
Dependencies are inferred from the claim text.