Patent ID: 6989045
Filing Date: 2006-01-24
Classification: B01D,F01N,Y02T,Y10S

Abstract:
1. A particulate trap system for an internal combustion engine, comprising: at least one particulate trap module positioned to accept engine exhaust gas including a plurality of passages having porous walls for receiving the exhaust gas, wherein the porous walls filter particulate from the exhaust gas; a flow reverse device, said flow reverse devise periodically reversing a portion of the filtered exhaust gas back through the porous walls in reverse flow at sufficient pressure drop and resultant flow velocity to dislodge and erode any build-up of soot and ash from the porous walls; an entrance chamber for receiving the exhaust gas from the engine and operatively connected to a first side of the at least one particulate trap module; a separation chamber operatively attached to a second side of the at least one particulate trap module and for receiving some of the exhaust gas from the at least one particulate trap module; an exit chamber for receiving the filtered exhaust gas passing through the porous walls of the at least one particulate trap; and means for creating a pressure difference between the separation chamber and the exit chamber in response to a pre-established engine operating condition, wherein the pressure in the exit chamber is greater than the pressure in the separation chamber, thereby forcing the filtered exhaust gas from the exit chamber back through the porous walls to dislodge and blow out the build-up of soot and ash on inner surfaces of the porous walls.